diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 ## Changelog
 
+#### 0.7.0
+
+- `language-lua` now supports Lua 5.3.
+- Some warnings printed with `base >= 4.8` are fixed.
+
+#### 0.6.3.3
+
+- Some bugs related with assignment statement parsing are fixed(#22).
+- Wrong error message for expected `==` operator is fixed(#23).
+
 #### 0.6.3.2
 
 - Build fixed for GHC 7.10.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,34 @@
+language-lua - Lua 5.3 lexer, parser and pretty-printer
+-------------------------------------------------------
+
+[![Build Status](https://travis-ci.org/osa1/language-lua.svg?branch=master)](https://travis-ci.org/osa1/language-lua)
+[![Coverage Status](https://coveralls.io/repos/osa1/language-lua/badge.svg)](https://coveralls.io/r/osa1/language-lua)
+[![Hackage](https://budueba.com/hackage/language-lua)](https://hackage.haskell.org/package/language-lua)
+
+This package is just like any other *language x* packages. It provides lexer, parser and pretty-printer for [Lua](http://www.lua.org/) programming language.
+
+[Haddock documentation](https://hackage.haskell.org/package/language-lua)
+
+### Usage
+
+This module provides 3 parsers.
+
+- `chunk`: Lua file parser.
+- `exp`: Lua expression parser.
+- `stat`: Lua statement parser.
+
+Lexing is needed before running a parser. `parseText` function runs lexer before parsing. So if you want to parse a Lua expression, you can call `parseText exp string`, where string is the Lua expression to parse.
+
+`parseFile` is a helper to parse Lua files. Example: `parseFile "/path/to/lua/file"`. This is same as ```parseText chunk `fmap` readFile path```.
+
+Note that `parseText` may result with failure, so it's return type is `Either ParserError a`.
+
+### Lexer
+
+Lexer is not exported by top-level Language.Lua module. You need to import `Language.Lua.Lexer`. After that, `llex string` scans the string and returns token list. Tokens are defined in `Language.Lua.Token`.
+
+### Pretty-printer
+
+Pretty-printer is still under development, and subject to lots of changes. It works, but lots of functionality will be added.
+
+For now, you can use `pprint syntax_tree` to pretty-print a Lua syntax tree.
diff --git a/bench/Main.hs b/bench/Main.hs
--- a/bench/Main.hs
+++ b/bench/Main.hs
@@ -10,8 +10,8 @@
 
 main :: IO ()
 main = defaultMain
-  [ env (loadFiles "lua-5.2.2-tests") $ \files ->
-      bench "Parsing Lua files from 5.2.2 test suite" $
+  [ env (loadFiles "lua-5.3.1-tests") $ \files ->
+      bench "Parsing Lua files from 5.3.1 test suite" $
         nf (catMaybes . map (either (const Nothing) Just) . map (parseText chunk)) files
   ]
 
diff --git a/dist/build/Language/Lua/Annotated/Lexer.hs b/dist/build/Language/Lua/Annotated/Lexer.hs
new file mode 100644
--- /dev/null
+++ b/dist/build/Language/Lua/Annotated/Lexer.hs
@@ -0,0 +1,962 @@
+{-# LANGUAGE CPP,MagicHash #-}
+{-# LINE 1 "src/Language/Lua/Annotated/Lexer.x" #-}
+
+{-# OPTIONS_GHC -w #-}
+
+module Language.Lua.Annotated.Lexer
+  ( llex
+  , llexFile
+  , LTok
+  , AlexPosn(..)
+  ) where
+
+import Language.Lua.Token
+import Control.Applicative ((<$>))
+import Control.Monad (forM_, unless, when)
+import Data.Char (isNumber)
+import Data.List (foldl')
+import Safe (readMay)
+
+
+#if __GLASGOW_HASKELL__ >= 603
+#include "ghcconfig.h"
+#elif defined(__GLASGOW_HASKELL__)
+#include "config.h"
+#endif
+#if __GLASGOW_HASKELL__ >= 503
+import Data.Array
+import Data.Char (ord)
+import Data.Array.Base (unsafeAt)
+#else
+import Array
+import Char (ord)
+#endif
+#if __GLASGOW_HASKELL__ >= 503
+import GHC.Exts
+#else
+import GlaExts
+#endif
+{-# LINE 1 "templates/wrappers.hs" #-}
+{-# LINE 1 "templates/wrappers.hs" #-}
+{-# LINE 1 "<built-in>" #-}
+{-# LINE 1 "<command-line>" #-}
+{-# LINE 10 "<command-line>" #-}
+# 1 "/usr/include/stdc-predef.h" 1 3 4
+
+# 17 "/usr/include/stdc-predef.h" 3 4
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+{-# LINE 10 "<command-line>" #-}
+{-# LINE 1 "/usr/local/lib64/ghc-7.10.1/include/ghcversion.h" #-}
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+{-# LINE 10 "<command-line>" #-}
+{-# LINE 1 "templates/wrappers.hs" #-}
+-- -----------------------------------------------------------------------------
+-- Alex wrapper code.
+--
+-- This code is in the PUBLIC DOMAIN; you may copy it freely and use
+-- it for any purpose whatsoever.
+
+import Control.Applicative (Applicative (..))
+import Data.Word (Word8)
+{-# LINE 23 "templates/wrappers.hs" #-}
+
+import qualified Data.Bits
+
+-- | Encode a Haskell String to a list of Word8 values, in UTF8 format.
+utf8Encode :: Char -> [Word8]
+utf8Encode = map fromIntegral . go . ord
+ where
+  go oc
+   | oc <= 0x7f       = [oc]
+
+   | oc <= 0x7ff      = [ 0xc0 + (oc `Data.Bits.shiftR` 6)
+                        , 0x80 + oc Data.Bits..&. 0x3f
+                        ]
+
+   | oc <= 0xffff     = [ 0xe0 + (oc `Data.Bits.shiftR` 12)
+                        , 0x80 + ((oc `Data.Bits.shiftR` 6) Data.Bits..&. 0x3f)
+                        , 0x80 + oc Data.Bits..&. 0x3f
+                        ]
+   | otherwise        = [ 0xf0 + (oc `Data.Bits.shiftR` 18)
+                        , 0x80 + ((oc `Data.Bits.shiftR` 12) Data.Bits..&. 0x3f)
+                        , 0x80 + ((oc `Data.Bits.shiftR` 6) Data.Bits..&. 0x3f)
+                        , 0x80 + oc Data.Bits..&. 0x3f
+                        ]
+
+
+
+type Byte = Word8
+
+-- -----------------------------------------------------------------------------
+-- The input type
+
+
+type AlexInput = (AlexPosn,     -- current position,
+                  Char,         -- previous char
+                  [Byte],       -- pending bytes on current char
+                  String)       -- current input string
+
+ignorePendingBytes :: AlexInput -> AlexInput
+ignorePendingBytes (p,c,ps,s) = (p,c,[],s)
+
+alexInputPrevChar :: AlexInput -> Char
+alexInputPrevChar (p,c,bs,s) = c
+
+alexGetByte :: AlexInput -> Maybe (Byte,AlexInput)
+alexGetByte (p,c,(b:bs),s) = Just (b,(p,c,bs,s))
+alexGetByte (p,c,[],[]) = Nothing
+alexGetByte (p,_,[],(c:s))  = let p' = alexMove p c 
+                                  (b:bs) = utf8Encode c
+                              in p' `seq`  Just (b, (p', c, bs, s))
+
+
+{-# LINE 93 "templates/wrappers.hs" #-}
+
+{-# LINE 107 "templates/wrappers.hs" #-}
+
+{-# LINE 122 "templates/wrappers.hs" #-}
+
+-- -----------------------------------------------------------------------------
+-- Token positions
+
+-- `Posn' records the location of a token in the input text.  It has three
+-- fields: the address (number of chacaters preceding the token), line number
+-- and column of a token within the file. `start_pos' gives the position of the
+-- start of the file and `eof_pos' a standard encoding for the end of file.
+-- `move_pos' calculates the new position after traversing a given character,
+-- assuming the usual eight character tab stops.
+
+
+data AlexPosn = AlexPn !Int !Int !Int
+        deriving (Eq,Show)
+
+alexStartPos :: AlexPosn
+alexStartPos = AlexPn 0 1 1
+
+alexMove :: AlexPosn -> Char -> AlexPosn
+alexMove (AlexPn a l c) '\t' = AlexPn (a+1)  l     (((c+7) `div` 8)*8+1)
+alexMove (AlexPn a l c) '\n' = AlexPn (a+1) (l+1)   1
+alexMove (AlexPn a l c) _    = AlexPn (a+1)  l     (c+1)
+
+
+-- -----------------------------------------------------------------------------
+-- Default monad
+
+
+data AlexState = AlexState {
+        alex_pos :: !AlexPosn,  -- position at current input location
+        alex_inp :: String,     -- the current input
+        alex_chr :: !Char,      -- the character before the input
+        alex_bytes :: [Byte],
+        alex_scd :: !Int        -- the current startcode
+
+      , alex_ust :: AlexUserState -- AlexUserState will be defined in the user program
+
+    }
+
+-- Compile with -funbox-strict-fields for best results!
+
+runAlex :: String -> Alex a -> Either String a
+runAlex input (Alex f) 
+   = case f (AlexState {alex_pos = alexStartPos,
+                        alex_inp = input,       
+                        alex_chr = '\n',
+                        alex_bytes = [],
+
+                        alex_ust = alexInitUserState,
+
+                        alex_scd = 0}) of Left msg -> Left msg
+                                          Right ( _, a ) -> Right a
+
+newtype Alex a = Alex { unAlex :: AlexState -> Either String (AlexState, a) }
+
+instance Functor Alex where
+  fmap f a = Alex $ \s -> case unAlex a s of
+                            Left msg -> Left msg
+                            Right (s', a') -> Right (s', f a')
+
+instance Applicative Alex where
+  pure a   = Alex $ \s -> Right (s, a)
+  fa <*> a = Alex $ \s -> case unAlex fa s of
+                            Left msg -> Left msg
+                            Right (s', f) -> case unAlex a s' of
+                                               Left msg -> Left msg
+                                               Right (s'', b) -> Right (s'', f b)
+
+instance Monad Alex where
+  m >>= k  = Alex $ \s -> case unAlex m s of 
+                                Left msg -> Left msg
+                                Right (s',a) -> unAlex (k a) s'
+  return a = Alex $ \s -> Right (s,a)
+
+alexGetInput :: Alex AlexInput
+alexGetInput
+ = Alex $ \s@AlexState{alex_pos=pos,alex_chr=c,alex_bytes=bs,alex_inp=inp} -> 
+        Right (s, (pos,c,bs,inp))
+
+alexSetInput :: AlexInput -> Alex ()
+alexSetInput (pos,c,bs,inp)
+ = Alex $ \s -> case s{alex_pos=pos,alex_chr=c,alex_bytes=bs,alex_inp=inp} of
+                  s@(AlexState{}) -> Right (s, ())
+
+alexError :: String -> Alex a
+alexError message = Alex $ \s -> Left message
+
+alexGetStartCode :: Alex Int
+alexGetStartCode = Alex $ \s@AlexState{alex_scd=sc} -> Right (s, sc)
+
+alexSetStartCode :: Int -> Alex ()
+alexSetStartCode sc = Alex $ \s -> Right (s{alex_scd=sc}, ())
+
+
+alexGetUserState :: Alex AlexUserState
+alexGetUserState = Alex $ \s@AlexState{alex_ust=ust} -> Right (s,ust)
+
+alexSetUserState :: AlexUserState -> Alex ()
+alexSetUserState ss = Alex $ \s -> Right (s{alex_ust=ss}, ())
+
+
+alexMonadScan = do
+  inp <- alexGetInput
+  sc <- alexGetStartCode
+  case alexScan inp sc of
+    AlexEOF -> alexEOF
+    AlexError ((AlexPn _ line column),_,_,_) -> alexError $ "lexical error at line " ++ (show line) ++ ", column " ++ (show column)
+    AlexSkip  inp' len -> do
+        alexSetInput inp'
+        alexMonadScan
+    AlexToken inp' len action -> do
+        alexSetInput inp'
+        action (ignorePendingBytes inp) len
+
+-- -----------------------------------------------------------------------------
+-- Useful token actions
+
+type AlexAction result = AlexInput -> Int -> Alex result
+
+-- just ignore this token and scan another one
+-- skip :: AlexAction result
+skip input len = alexMonadScan
+
+-- ignore this token, but set the start code to a new value
+-- begin :: Int -> AlexAction result
+begin code input len = do alexSetStartCode code; alexMonadScan
+
+-- perform an action for this token, and set the start code to a new value
+andBegin :: AlexAction result -> Int -> AlexAction result
+(action `andBegin` code) input len = do alexSetStartCode code; action input len
+
+token :: (AlexInput -> Int -> token) -> AlexAction token
+token t input len = return (t input len)
+
+
+
+-- -----------------------------------------------------------------------------
+-- Monad (with ByteString input)
+
+{-# LINE 347 "templates/wrappers.hs" #-}
+
+
+-- -----------------------------------------------------------------------------
+-- Basic wrapper
+
+{-# LINE 374 "templates/wrappers.hs" #-}
+
+
+-- -----------------------------------------------------------------------------
+-- Basic wrapper, ByteString version
+
+{-# LINE 392 "templates/wrappers.hs" #-}
+
+{-# LINE 406 "templates/wrappers.hs" #-}
+
+
+-- -----------------------------------------------------------------------------
+-- Posn wrapper
+
+-- Adds text positions to the basic model.
+
+{-# LINE 423 "templates/wrappers.hs" #-}
+
+
+-- -----------------------------------------------------------------------------
+-- Posn wrapper, ByteString version
+
+{-# LINE 438 "templates/wrappers.hs" #-}
+
+
+-- -----------------------------------------------------------------------------
+-- GScan wrapper
+
+-- For compatibility with previous versions of Alex, and because we can.
+
+alex_base :: AlexAddr
+alex_base = AlexA# "\xf8\xff\xff\xff\xfd\xff\xff\xff\xa0\x00\x00\x00\xa0\x01\x00\x00\x64\x02\x00\x00\xdc\xff\xff\xff\xc1\x00\x00\x00\xc2\x00\x00\x00\xb4\x02\x00\x00\xda\x02\x00\x00\xd8\x02\x00\x00\x58\x03\x00\x00\x8b\xff\xff\xff\x8d\xff\xff\xff\x00\x00\x00\x00\xc9\x03\x00\x00\xf0\x01\x00\x00\x99\x04\x00\x00\xb0\x04\x00\x00\xd6\x04\x00\x00\x00\x00\x00\x00\x7e\x04\x00\x00\x7e\x05\x00\x00\xce\x05\x00\x00\x13\x06\x00\x00\xcf\x05\x00\x00\xcf\x06\x00\x00\x1f\x07\x00\x00\x64\x07\x00\x00\x20\x07\x00\x00\x20\x08\x00\x00\xe0\x07\x00\x00\x00\x00\x00\x00\xe0\x08\x00\x00\xa0\x08\x00\x00\xa0\x09\x00\x00\x64\x0a\x00\x00\xf5\x09\x00\x00\xb4\x0a\x00\x00\xcb\x0a\x00\x00\x07\x0b\x00\x00\x1e\x0b\x00\x00\x44\x0b\x00\x00\xde\xff\xff\xff\xd0\x00\x00\x00\xdf\x00\x00\x00\x07\x02\x00\x00\x21\x02\x00\x00\x6a\x0b\x00\x00\xcf\x02\x00\x00\xb7\x0b\x00\x00\x12\x02\x00\x00\xf1\x05\x00\x00\x27\x02\x00\x00\xcf\x0b\x00\x00\xf5\x0b\x00\x00\x1b\x0c\x00\x00\x32\x0c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\xf2\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf3\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\xdd\xff\xff\xff\x00\x00\x00\x00\xed\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x3b\x00\x00\x00\x3c\x00\x00\x00\xfb\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe6\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1a\x00\x00\x00\x00\x00\x00\x00\x14\x03\x00\x00\x4d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x3f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"#
+
+alex_table :: AlexAddr
+alex_table = AlexA# 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+
+alex_check :: AlexAddr
+alex_check = AlexA# 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+
+alex_deflt :: AlexAddr
+alex_deflt = AlexA# "\xff\xff\x43\x00\x40\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x14\x00\x14\x00\xff\xff\xff\xff\xff\xff\xff\xff\x20\x00\x20\x00\x03\x00\xff\xff\xff\xff\x03\x00\x23\x00\xff\xff\xff\xff\x23\x00\x43\x00\x43\x00\x43\x00\x40\x00\x40\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"#
+
+alex_accept = listArray (0::Int,103) [AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccNone,AlexAccSkip,AlexAcc (alex_action_1),AlexAcc (alex_action_2),AlexAcc (alex_action_2),AlexAcc (alex_action_3),AlexAcc (alex_action_4),AlexAcc (alex_action_4),AlexAcc (alex_action_5),AlexAcc (alex_action_6),AlexAcc (alex_action_7),AlexAcc (alex_action_7),AlexAcc (alex_action_8),AlexAcc (alex_action_9),AlexAcc (alex_action_10),AlexAcc (alex_action_10),AlexAcc (alex_action_11),AlexAcc (alex_action_12),AlexAcc (alex_action_12),AlexAcc (alex_action_13),AlexAccSkip,AlexAccSkip,AlexAcc (alex_action_15),AlexAcc (alex_action_16),AlexAcc (alex_action_16),AlexAcc (alex_action_17),AlexAcc (alex_action_18),AlexAcc (alex_action_19),AlexAcc (alex_action_20),AlexAcc (alex_action_21),AlexAcc (alex_action_22),AlexAcc (alex_action_23),AlexAcc (alex_action_24),AlexAcc (alex_action_25),AlexAcc (alex_action_26),AlexAcc (alex_action_27),AlexAcc (alex_action_28),AlexAcc (alex_action_29),AlexAcc (alex_action_30),AlexAcc (alex_action_31),AlexAcc (alex_action_32),AlexAcc (alex_action_33),AlexAcc (alex_action_34),AlexAcc (alex_action_35),AlexAcc (alex_action_36),AlexAcc (alex_action_37),AlexAcc (alex_action_38),AlexAcc (alex_action_39),AlexAcc (alex_action_40),AlexAcc (alex_action_41),AlexAcc (alex_action_42),AlexAcc (alex_action_43),AlexAcc (alex_action_44),AlexAcc (alex_action_45),AlexAcc (alex_action_46),AlexAcc (alex_action_47),AlexAcc (alex_action_48),AlexAcc (alex_action_49)]
+{-# LINE 108 "src/Language/Lua/Annotated/Lexer.x" #-}
+
+
+data AlexUserState = AlexUserState { stringState     :: !Bool
+                                   , stringDelimLen  :: !Int
+                                   , stringPosn      :: !AlexPosn
+                                   , stringValue     :: !String
+                                   -- comments
+                                   , commentState    :: !Bool
+                                   }
+
+alexInitUserState :: AlexUserState
+alexInitUserState = AlexUserState { stringState     = False
+                                  , stringDelimLen  = 0
+                                  , stringPosn      = AlexPn 0 0 0
+                                  , stringValue     = ""
+                                  , commentState    = False
+                                  }
+
+initString :: Int -> AlexPosn -> Alex ()
+initString i posn = Alex $ \s -> Right(s{alex_ust=(alex_ust s){stringState=True,stringValue="",stringDelimLen=i,stringPosn=posn}}, ())
+
+initComment :: Alex ()
+initComment = Alex $ \s -> Right(s{alex_ust=(alex_ust s){commentState=True}}, ())
+
+getStringDelimLen :: Alex Int
+getStringDelimLen = Alex $ \s@AlexState{alex_ust=ust} -> Right (s, stringDelimLen ust)
+
+getStringPosn :: Alex AlexPosn
+getStringPosn = Alex $ \s@AlexState{alex_ust=ust} -> Right (s, stringPosn ust)
+
+getStringValue :: Alex String
+getStringValue = Alex $ \s@AlexState{alex_ust=ust} -> Right (s, stringValue ust)
+
+getStringState :: Alex Bool
+getStringState = Alex $ \s@AlexState{alex_ust=ust} -> Right (s, stringState ust)
+
+getCommentState :: Alex Bool
+getCommentState = Alex $ \s@AlexState{alex_ust=ust} -> Right (s, commentState ust)
+
+addCharToStringValue :: Char -> Alex ()
+addCharToStringValue c = Alex $ \s -> Right (s{alex_ust=(alex_ust s){stringValue=c:stringValue (alex_ust s)}}, ())
+
+putInputBack :: String -> Alex ()
+putInputBack str = Alex $ \s -> Right (s{alex_inp=str ++ alex_inp s}, ())
+
+enterString :: AlexAction LTok
+enterString (posn,_,_,s) len = do
+  initString (if (s !! (len-1) == '\n') then len-1 else len) posn
+  alexMonadScan'
+
+enterComment :: AlexAction LTok
+enterComment _ _ = do
+  initComment
+  alexMonadScan'
+
+addString :: AlexAction LTok
+addString (_,_,_,s) len = do
+  forM_ (take len s) addCharToStringValue
+  alexMonadScan'
+
+addCharToString :: AlexAction LTok
+addCharToString (_,_,_,s) len = do
+  addCharToStringValue (head s)
+  alexMonadScan'
+
+endString :: Alex ()
+endString = Alex $ \s -> Right(s{alex_ust=(alex_ust s){stringState=False}}, ())
+
+endComment :: Alex ()
+endComment = Alex $ \s -> Right(s{alex_ust=(alex_ust s){commentState=False}}, ())
+
+testAndEndComment :: AlexAction LTok
+testAndEndComment _ _ = do
+  ss <- getStringState
+  if ss then alexMonadScan' else endComment >> alexSetStartCode 0 >> alexMonadScan'
+
+testAndEndString :: AlexAction LTok
+testAndEndString (_,_,_,s) len = do
+  startlen <- getStringDelimLen
+  if startlen /= len
+    then do addCharToStringValue (head s)
+            putInputBack (tail $ take len s)
+            alexMonadScan'
+    else do endString
+            alexSetStartCode 0
+            cs <- getCommentState
+            if cs
+              then do
+                endComment
+                alexMonadScan'
+              else do
+                val  <- getStringValue
+                posn <- getStringPosn
+                return (LTokSLit (reverse val), posn)
+
+{-# INLINE mkString #-}
+mkString :: Bool -> String -> Int -> AlexPosn -> LTok
+mkString True s l posn =
+    -- double quoted string, to make it Haskell readable
+    (LTokSLit (readString posn $ r (replaceCharCodes (take l s))), posn)
+  where
+    -- we could handle \z while reading characters, at the cost of adding
+    -- more state to the lexer. I wanted to go with simplest
+    -- implementation.
+    r ('\\' : 'z' : rest) = r (skipWS rest)
+    -- handle newline escaping
+    r ('\\' : '\n' : rest) = '\n' : r rest
+    -- skip escaped backslash
+    r ('\\' : '\\' : rest) = '\\' : '\\' : r rest
+    -- quote already escaped, Lua allows this. (ie. "\'")
+    r ('\\' : '\'' : rest) = '\'' : r rest
+
+    r (c : rest) = c : r rest
+    r [] = []
+mkString False s l posn =
+    -- single quoted string, to make it Haskell readable
+    (LTokSLit (readString posn $ '"' : r (replaceCharCodes (take (l-2) $ drop 1 s)) ++ "\""), posn)
+  where
+    -- handle \z
+    r ('\\' : 'z' : rest) = r (skipWS rest)
+    -- handle newline escaping
+    r ('\\' : '\n' : rest) = '\n' : r rest
+    -- skip escaped backslash
+    r ('\\' : '\\' : rest) = '\\' : '\\' : r rest
+    -- escaped single quote, remove the escaping
+    r ('\\' : '\'' : rest) = '\'' : r rest
+    -- double quote already escaped, Lua allows this. (ie. '\"')
+    r ('\\' : '"' : rest) = '\\' : '"' : r rest
+    -- unescaped double quote, escape it
+    r ('"' : rest) = '\\' : '"' : r rest
+    r (c : rest) = c : r rest
+    r [] = []
+
+replaceCharCodes :: String -> String
+replaceCharCodes s =
+  case s of
+    ('\\' : 'x' : h1 : h2 : rest) -> toEnum (hexToInt h1 * 16 + hexToInt h2) : replaceCharCodes rest
+    ('\\' : 'u' : '{' : rest) ->
+        case break (=='}') rest of
+          (ds,_:rest')
+             | code <= 0x10ffff -> toEnum code : replaceCharCodes rest'
+             | otherwise        -> '\xFFFD' : replaceCharCodes rest'
+             where code = foldl' (\acc d -> acc * 16 + hexToInt d) 0 ds
+          _ -> error "lexical error: unterminated unicode escape"
+    ('\\' : c1 : c2 : c3 : rest)
+      | isNumber c1 && isNumber c2 && isNumber c3 ->
+          toEnum (decToNum c1 * 100 + decToNum c2 * 10 + decToNum c3) : replaceCharCodes rest
+      | isNumber c1 && isNumber c2 ->
+          toEnum (decToNum c1 * 10 + decToNum c2) : replaceCharCodes (c3 : rest)
+      | isNumber c1 ->
+          toEnum (decToNum c1) : replaceCharCodes (c2 : c3 : rest)
+      | otherwise ->
+          '\\' : c1 : replaceCharCodes (c2 : c3 : rest)
+    ['\\', c1, c2]
+      | isNumber c1 && isNumber c2 ->
+          [toEnum (decToNum c1 * 10 + decToNum c2)]
+      | isNumber c1 ->
+          toEnum (decToNum c1) : replaceCharCodes [c2]
+      | otherwise -> s
+    ['\\', c1]
+      | isNumber c1 -> [toEnum (decToNum c1)]
+      | otherwise -> s
+    (c : rest) -> c : replaceCharCodes rest
+    [] -> []
+
+skipWS :: String -> String
+skipWS (' '  : rest) = skipWS rest
+skipWS ('\n' : rest) = skipWS rest
+skipWS ('\t' : rest) = skipWS rest
+skipWS str           = str
+
+hexToInt :: Char -> Int
+hexToInt c =
+  case c of
+    'A' -> 10
+    'a' -> 10
+    'B' -> 11
+    'b' -> 11
+    'C' -> 12
+    'c' -> 12
+    'D' -> 13
+    'd' -> 13
+    'E' -> 14
+    'e' -> 14
+    'F' -> 15
+    'f' -> 15
+    _   -> decToNum c
+
+{-# INLINE decToNum #-}
+decToNum :: Char -> Int
+decToNum c = fromEnum c - fromEnum '0'
+
+
+readString :: AlexPosn -> String -> String
+readString (AlexPn _ line col) s =
+  case readMay s of
+    Nothing -> error $ concat
+      [ "lexical error near line: ", show line, " col: ", show col, ": Cannot read string " ++ show s ]
+    Just s' -> s'
+
+-- | Lua token with position information.
+type LTok = (LToken, AlexPosn)
+
+-- type AlexAction result = AlexInput -> Int -> Alex result
+
+-- Helper to make LTokens with string value (like LTokNum, LTokSLit etc.)
+tokWValue :: (String -> LToken) -> AlexInput -> Int -> Alex LTok
+tokWValue tok (posn,_,_,s) len = return (tok (take len s), posn)
+
+tok :: LToken -> AlexInput -> Int -> Alex LTok
+tok t (posn,_,_,_) _ = return (t, posn)
+
+{-# INLINE ident #-}
+ident :: AlexAction LTok
+ident (posn,_,_,s) len = return (tok, posn)
+  where tok = case (take len s) of
+          "and"      -> LTokAnd
+          "break"    -> LTokBreak
+          "do"       -> LTokDo
+          "else"     -> LTokElse
+          "elseif"   -> LTokElseIf
+          "end"      -> LTokEnd
+          "false"    -> LTokFalse
+          "for"      -> LTokFor
+          "function" -> LTokFunction
+          "goto"     -> LTokGoto
+          "if"       -> LTokIf
+          "in"       -> LTokIn
+          "local"    -> LTokLocal
+          "nil"      -> LTokNil
+          "not"      -> LTokNot
+          "or"       -> LTokOr
+          "repeat"   -> LTokRepeat
+          "return"   -> LTokReturn
+          "then"     -> LTokThen
+          "true"     -> LTokTrue
+          "until"    -> LTokUntil
+          "while"    -> LTokWhile
+          ident'     -> LTokIdent ident'
+
+--data AlexPosn = AlexPn !Int  -- absolute character offset
+--                       !Int  -- line number
+--                       !Int  -- column number
+--
+--type AlexInput = (AlexPosn,     -- current position,
+--                  Char,         -- previous char
+--                  [Byte],       -- rest of the bytes for the current char
+--                  String)       -- current input string
+
+alexEOF :: Alex LTok
+alexEOF = return (LTokEof, AlexPn (-1) (-1) (-1))
+
+alexMonadScan' :: Alex LTok
+alexMonadScan' = do
+  inp <- alexGetInput
+  sc <- alexGetStartCode
+  case alexScan inp sc of
+    AlexEOF -> do cs <- getCommentState
+                  when cs endString
+                  alexEOF
+    AlexError ((AlexPn _ line col),ch,_,_) -> alexError $ concat
+        [ "lexical error near line: " , show line , " col: " , show col , " at char " , [ch] ]
+    AlexSkip  inp' len -> do
+        alexSetInput inp'
+        alexMonadScan'
+    AlexToken inp' len action -> do
+        alexSetInput inp'
+        action (ignorePendingBytes inp) len
+
+scanner :: String -> Either String [LTok]
+scanner str = runAlex str loop
+  where loop = do
+          t@(tok, _) <- alexMonadScan'
+          if tok == LTokEof
+            then do stringState <- getStringState
+                    if stringState
+                      then alexError "String not closed at end of file"
+                      else return [t]
+            else do toks <- loop
+                    return (t:toks)
+
+-- | Drop the first line of a Lua file when it starts with a '#'
+dropSpecialComment :: String -> String
+dropSpecialComment ('#':xs) = dropWhile (/='\n') xs
+dropSpecialComment xs = xs
+-- Newline is preserved in order to ensure that line numbers stay correct
+
+-- | Lua lexer.
+llex :: String -> [LTok]
+llex s = case scanner (dropSpecialComment s) of
+           Left err -> error err
+           Right r  -> r
+
+-- | Run Lua lexer on a file.
+llexFile :: FilePath -> IO [LTok]
+llexFile p = llex <$> readFile p
+
+
+state_comment,state_string :: Int
+state_comment = 1
+state_string = 2
+alex_action_1 =  ident 
+alex_action_2 =  tokWValue LTokNum 
+alex_action_3 =  tokWValue LTokNum 
+alex_action_4 =  tokWValue LTokNum 
+alex_action_5 =  tokWValue LTokNum 
+alex_action_6 =  tokWValue LTokNum 
+alex_action_7 =  tokWValue LTokNum 
+alex_action_8 =  \(posn,_,_,s) l -> return $ mkString True  s l posn 
+alex_action_9 =  \(posn,_,_,s) l -> return $ mkString False s l posn 
+alex_action_10 =  enterString `andBegin` state_string 
+alex_action_11 =  testAndEndString 
+alex_action_12 =  addCharToString 
+alex_action_13 =  enterComment `andBegin` state_comment 
+alex_action_15 =  testAndEndComment 
+alex_action_16 =  enterString `andBegin` state_string 
+alex_action_17 =  tok LTokPlus 
+alex_action_18 =  tok LTokMinus 
+alex_action_19 =  tok LTokStar 
+alex_action_20 =  tok LTokSlash 
+alex_action_21 =  tok LTokPercent 
+alex_action_22 =  tok LTokExp 
+alex_action_23 =  tok LTokSh 
+alex_action_24 =  tok LTokEqual 
+alex_action_25 =  tok LTokNotequal 
+alex_action_26 =  tok LTokLEq 
+alex_action_27 =  tok LTokGEq 
+alex_action_28 =  tok LTokLT 
+alex_action_29 =  tok LTokGT 
+alex_action_30 =  tok LTokAssign 
+alex_action_31 =  tok LTokLParen 
+alex_action_32 =  tok LTokRParen 
+alex_action_33 =  tok LTokLBrace 
+alex_action_34 =  tok LTokRBrace 
+alex_action_35 =  tok LTokLBracket 
+alex_action_36 =  tok LTokRBracket 
+alex_action_37 =  tok LTokDColon 
+alex_action_38 =  tok LTokSemic 
+alex_action_39 =  tok LTokColon 
+alex_action_40 =  tok LTokComma 
+alex_action_41 =  tok LTokDot 
+alex_action_42 =  tok LTokDDot 
+alex_action_43 =  tok LTokEllipsis 
+alex_action_44 =  tok LTokAmpersand 
+alex_action_45 =  tok LTokPipe 
+alex_action_46 =  tok LTokTilde 
+alex_action_47 =  tok LTokDLT 
+alex_action_48 =  tok LTokDGT 
+alex_action_49 =  tok LTokDGT 
+{-# LINE 1 "templates/GenericTemplate.hs" #-}
+{-# LINE 1 "templates/GenericTemplate.hs" #-}
+{-# LINE 1 "<built-in>" #-}
+{-# LINE 1 "<command-line>" #-}
+{-# LINE 10 "<command-line>" #-}
+# 1 "/usr/include/stdc-predef.h" 1 3 4
+
+# 17 "/usr/include/stdc-predef.h" 3 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+{-# LINE 10 "<command-line>" #-}
+{-# LINE 1 "/usr/local/lib64/ghc-7.10.1/include/ghcversion.h" #-}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+{-# LINE 10 "<command-line>" #-}
+{-# LINE 1 "templates/GenericTemplate.hs" #-}
+-- -----------------------------------------------------------------------------
+-- ALEX TEMPLATE
+--
+-- This code is in the PUBLIC DOMAIN; you may copy it freely and use
+-- it for any purpose whatsoever.
+
+-- -----------------------------------------------------------------------------
+-- INTERNALS and main scanner engine
+
+{-# LINE 21 "templates/GenericTemplate.hs" #-}
+
+
+
+
+
+-- Do not remove this comment. Required to fix CPP parsing when using GCC and a clang-compiled alex.
+#if __GLASGOW_HASKELL__ > 706
+#define GTE(n,m) (tagToEnum# (n >=# m))
+#define EQ(n,m) (tagToEnum# (n ==# m))
+#else
+#define GTE(n,m) (n >=# m)
+#define EQ(n,m) (n ==# m)
+#endif
+{-# LINE 51 "templates/GenericTemplate.hs" #-}
+
+
+data AlexAddr = AlexA# Addr#
+-- Do not remove this comment. Required to fix CPP parsing when using GCC and a clang-compiled alex.
+#if __GLASGOW_HASKELL__ < 503
+uncheckedShiftL# = shiftL#
+#endif
+
+{-# INLINE alexIndexInt16OffAddr #-}
+alexIndexInt16OffAddr (AlexA# arr) off =
+#ifdef WORDS_BIGENDIAN
+  narrow16Int# i
+  where
+        i    = word2Int# ((high `uncheckedShiftL#` 8#) `or#` low)
+        high = int2Word# (ord# (indexCharOffAddr# arr (off' +# 1#)))
+        low  = int2Word# (ord# (indexCharOffAddr# arr off'))
+        off' = off *# 2#
+#else
+  indexInt16OffAddr# arr off
+#endif
+
+
+
+
+
+{-# INLINE alexIndexInt32OffAddr #-}
+alexIndexInt32OffAddr (AlexA# arr) off = 
+#ifdef WORDS_BIGENDIAN
+  narrow32Int# i
+  where
+   i    = word2Int# ((b3 `uncheckedShiftL#` 24#) `or#`
+		     (b2 `uncheckedShiftL#` 16#) `or#`
+		     (b1 `uncheckedShiftL#` 8#) `or#` b0)
+   b3   = int2Word# (ord# (indexCharOffAddr# arr (off' +# 3#)))
+   b2   = int2Word# (ord# (indexCharOffAddr# arr (off' +# 2#)))
+   b1   = int2Word# (ord# (indexCharOffAddr# arr (off' +# 1#)))
+   b0   = int2Word# (ord# (indexCharOffAddr# arr off'))
+   off' = off *# 4#
+#else
+  indexInt32OffAddr# arr off
+#endif
+
+
+
+
+
+
+#if __GLASGOW_HASKELL__ < 503
+quickIndex arr i = arr ! i
+#else
+-- GHC >= 503, unsafeAt is available from Data.Array.Base.
+quickIndex = unsafeAt
+#endif
+
+
+
+
+-- -----------------------------------------------------------------------------
+-- Main lexing routines
+
+data AlexReturn a
+  = AlexEOF
+  | AlexError  !AlexInput
+  | AlexSkip   !AlexInput !Int
+  | AlexToken  !AlexInput !Int a
+
+-- alexScan :: AlexInput -> StartCode -> AlexReturn a
+alexScan input (I# (sc))
+  = alexScanUser undefined input (I# (sc))
+
+alexScanUser user input (I# (sc))
+  = case alex_scan_tkn user input 0# input sc AlexNone of
+	(AlexNone, input') ->
+		case alexGetByte input of
+			Nothing -> 
+
+
+
+				   AlexEOF
+			Just _ ->
+
+
+
+				   AlexError input'
+
+	(AlexLastSkip input'' len, _) ->
+
+
+
+		AlexSkip input'' len
+
+	(AlexLastAcc k input''' len, _) ->
+
+
+
+		AlexToken input''' len k
+
+
+-- Push the input through the DFA, remembering the most recent accepting
+-- state it encountered.
+
+alex_scan_tkn user orig_input len input s last_acc =
+  input `seq` -- strict in the input
+  let 
+	new_acc = (check_accs (alex_accept `quickIndex` (I# (s))))
+  in
+  new_acc `seq`
+  case alexGetByte input of
+     Nothing -> (new_acc, input)
+     Just (c, new_input) -> 
+
+
+
+      case fromIntegral c of { (I# (ord_c)) ->
+        let
+                base   = alexIndexInt32OffAddr alex_base s
+                offset = (base +# ord_c)
+                check  = alexIndexInt16OffAddr alex_check offset
+		
+                new_s = if GTE(offset,0#) && EQ(check,ord_c)
+			  then alexIndexInt16OffAddr alex_table offset
+			  else alexIndexInt16OffAddr alex_deflt s
+	in
+        case new_s of
+	    -1# -> (new_acc, input)
+		-- on an error, we want to keep the input *before* the
+		-- character that failed, not after.
+    	    _ -> alex_scan_tkn user orig_input (if c < 0x80 || c >= 0xC0 then (len +# 1#) else len)
+                                                -- note that the length is increased ONLY if this is the 1st byte in a char encoding)
+			new_input new_s new_acc
+      }
+  where
+	check_accs (AlexAccNone) = last_acc
+	check_accs (AlexAcc a  ) = AlexLastAcc a input (I# (len))
+	check_accs (AlexAccSkip) = AlexLastSkip  input (I# (len))
+{-# LINE 198 "templates/GenericTemplate.hs" #-}
+
+data AlexLastAcc a
+  = AlexNone
+  | AlexLastAcc a !AlexInput !Int
+  | AlexLastSkip  !AlexInput !Int
+
+instance Functor AlexLastAcc where
+    fmap f AlexNone = AlexNone
+    fmap f (AlexLastAcc x y z) = AlexLastAcc (f x) y z
+    fmap f (AlexLastSkip x y) = AlexLastSkip x y
+
+data AlexAcc a user
+  = AlexAccNone
+  | AlexAcc a
+  | AlexAccSkip
+{-# LINE 242 "templates/GenericTemplate.hs" #-}
+
+-- used by wrappers
+iUnbox (I# (i)) = i
diff --git a/language-lua.cabal b/language-lua.cabal
--- a/language-lua.cabal
+++ b/language-lua.cabal
@@ -1,9 +1,9 @@
 Name:                language-lua
 
 Description:
-    Lua 5.2 lexer, parser and pretty-printer.
+    Lua 5.3 lexer, parser and pretty-printer.
 
-Version:             0.6.3.2
+Version:             0.7.0
 Synopsis:            Lua parser and pretty-printer
 Homepage:            http://github.com/osa1/language-lua
 Bug-reports:         http://github.com/osa1/language-lua/issues
@@ -14,12 +14,13 @@
 Category:            Language
 Build-type:          Simple
 Stability:           Experimental
-Cabal-version:       >= 1.9.2
+Cabal-version:       >= 1.10
 
 Extra-source-files:  src/Text/PrettyPrint/LICENSE
                      tests/numbers
                      tests/strings
-                     lua-5.2.2-tests/*.lua
+                     lua-5.3.1-tests/*.lua
+                     README.md
                      CHANGELOG.md
 
 Source-repository head
@@ -28,6 +29,7 @@
 
 Library
   Hs-source-dirs:    src
+  Default-language:  Haskell2010
 
   Exposed-modules:   Language.Lua
                      Language.Lua.Token
@@ -56,6 +58,7 @@
 
 Test-Suite tests
   Type:              exitcode-stdio-1.0
+  Default-language:  Haskell2010
   Hs-source-dirs:    tests
   Main-is:           Main.hs
   Build-depends:     base >= 4.5 && < 4.9,
diff --git a/lua-5.2.2-tests/all.lua b/lua-5.2.2-tests/all.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/all.lua
+++ /dev/null
@@ -1,258 +0,0 @@
-
-local version = "Lua 5.2"
-if _VERSION ~= version then
-  io.stderr:write("\nThis test suite is for ", version, ", not for ", _VERSION,
-    "\nExiting tests\n")
-  return
-end
-
-
--- next variables control the execution of some tests
--- true means no test (so an undefined variable does not skip a test)
--- defaults are for Linux; test everything
-
-_soft = false      -- true to avoid long or memory consuming tests
-_port = false      -- true to avoid non-portable tests
-_no32 = false      -- true to avoid tests that assume 32 bits
-_nomsg = false     -- true to avoid messages about tests not performed
-_noposix = false   -- false assumes LUA_USE_POSIX
-_nolonglong = false  -- false assumes LUA_USE_LONGLONG
-_noformatA = false   -- false assumes LUA_USE_AFORMAT
-
-
-local usertests = rawget(_G, "_U")
-
-if usertests then
-  -- tests for sissies ;)  Avoid problems
-  _soft = true
-  _port = true
-  _no32 = true
-  _nomsg = true
-  _noposix = true
-  _nolonglong = true
-  _noformatA = true; 
-end
-
--- no "internal" tests for user tests
-if usertests then T = nil end
-
-T = rawget(_G, "T")  -- avoid problems with 'strict' module
-
-package.path = "?;./?.lua" .. package.path
-
-math.randomseed(0)
-
-collectgarbage("setstepmul", 200)
-collectgarbage("setpause", 200)
-
-
---[=[
-  example of a long [comment],
-  [[spanning several [lines]]]
-
-]=]
-
-print("current path:\n****" .. package.path .. "****\n")
-
-
-local c = os.clock()
-
-local collectgarbage = collectgarbage
-
-do   -- (
-
--- track messages for tests not performed
-local msgs = {}
-function Message (m)
-  if not _nomsg then
-    print(m)
-    msgs[#msgs+1] = string.sub(m, 3, -3)
-  end
-end
-
-assert(os.setlocale"C")
-
-local T,print,format,write,assert,type,unpack,floor =
-      T,print,string.format,io.write,assert,type,table.unpack,math.floor
-
--- use K for 1000 and M for 1000000 (not 2^10 -- 2^20)
-local function F (m)
-  local function round (m)
-    m = m + 0.04999
-    return m - (m % 0.1)     -- keep one decimal digit
-  end
-  if m < 1000 then return m
-  else
-    m = m / 1000
-    if m < 1000 then return round(m).."K"
-    else
-      return round(m/1000).."M"
-    end
-  end
-end
-
-local showmem
-if not T then
-  local max = 0
-  showmem = function ()
-    local m = collectgarbage("count") * 1024
-    max = (m > max) and m or max
-    print(format("    ---- total memory: %s, max memory: %s ----\n",
-          F(m), F(max)))
-  end
-else
-  showmem = function ()
-    T.checkmemory()
-    local total, numblocks, maxmem = T.totalmem()
-    local count = collectgarbage("count")
-    print(format(
-      "\n    ---- total memory: %s (%.0fK), max use: %s,  blocks: %d\n",
-      F(total), count, F(maxmem), numblocks))
-    print(format("\t(strings:  %d, tables: %d, functions: %d, "..
-                 "\n\tudata: %d, threads: %d)",
-                 T.totalmem"string", T.totalmem"table", T.totalmem"function",
-                 T.totalmem"userdata", T.totalmem"thread"))
-  end
-end
-
-
---
--- redefine dofile to run files through dump/undump
---
-local function report (n) print("\n***** FILE '"..n.."'*****") end
-local olddofile = dofile
-dofile = function (n)
-  showmem()
-  report(n)
-  local f = assert(loadfile(n))
-  local b = string.dump(f)
-  f = assert(load(b))
-  return f()
-end
-
-dofile('main.lua')
-
-do
-  local next, setmetatable, stderr = next, setmetatable, io.stderr
-  local mt = {}
-  -- each time a table is collected, create a new one to be
-  -- collected next cycle
-  mt.__gc = function (o)
-    stderr:write'.'    -- mark progress
-    local n = setmetatable({}, mt)   -- replicate object
-    o = nil
-    local a,b,c,d,e = nil    -- erase 'o' from the stack
-  end
-  local n = setmetatable({}, mt)   -- replicate object
-end
-
-report"gc.lua"
-local f = assert(loadfile('gc.lua'))
-f()
-
-collectgarbage("generational")
-dofile('db.lua')
-assert(dofile('calls.lua') == deep and deep)
-olddofile('strings.lua')
-olddofile('literals.lua')
-assert(dofile('attrib.lua') == 27)
-
-collectgarbage("incremental")   -- redo some tests in incremental mode
-olddofile('strings.lua')
-olddofile('literals.lua')
-dofile('constructs.lua')
-dofile('api.lua')
-
-collectgarbage("generational")   -- back to generational mode
-collectgarbage("setpause", 200)
-collectgarbage("setmajorinc", 500)
-assert(dofile('locals.lua') == 5)
-dofile('constructs.lua')
-dofile('code.lua')
-if not _G._soft then
-  report('big.lua')
-  local f = coroutine.wrap(assert(loadfile('big.lua')))
-  assert(f() == 'b')
-  assert(f() == 'a')
-end
-dofile('nextvar.lua')
-dofile('pm.lua')
-dofile('api.lua')
-assert(dofile('events.lua') == 12)
-dofile('vararg.lua')
-dofile('closure.lua')
-dofile('coroutine.lua')
-dofile('goto.lua')
-dofile('errors.lua')
-dofile('math.lua')
-dofile('sort.lua')
-dofile('bitwise.lua')
-assert(dofile('verybig.lua') == 10); collectgarbage()
-dofile('files.lua')
-
-if #msgs > 0 then
-  print("\ntests not performed:")
-  for i=1,#msgs do
-    print(msgs[i])
-  end
-  print()
-end
-
-print("final OK !!!")
-
-local debug = require "debug"
-
-debug.sethook(function (a) assert(type(a) == 'string') end, "cr")
-
--- to survive outside block
-_G.showmem = showmem
-
-end   --)
-
-local _G, showmem, print, format, clock, assert, open =
-      _G, showmem, print, string.format, os.clock, assert, io.open
-
--- file with time of last performed test
-local fname = T and "time-debug.txt" or "time.txt"
-local lasttime
-
-if not usertests then
-  -- open file with time of last performed test
-  local f = io.open(fname)
-  if f then
-    lasttime = assert(tonumber(f:read'*a'))
-    f:close();
-  else   -- no such file; assume it is recording time for first time
-    lasttime = nil
-  end
-end
-
--- erase (almost) all globals
-print('cleaning all!!!!')
-for n in pairs(_G) do
-  if not ({___Glob = 1, tostring = 1})[n] then
-    _G[n] = nil
-  end
-end
-
-
-collectgarbage()
-collectgarbage()
-collectgarbage()
-collectgarbage()
-collectgarbage()
-collectgarbage();showmem()
-
-local time = clock() - c
-
-print(format("\n\ntotal time: %.2f\n", time))
-
-if not usertests then
-  lasttime = lasttime or time    -- if there is no last time, ignore difference
-  -- check whether current test time differs more than 5% from last time
-  local diff = (time - lasttime) / time
-  local tolerance = 0.05    -- 5%
-  assert(diff < tolerance and diff > -tolerance)
-  assert(open(fname, "w")):write(time):close()
-end
-
diff --git a/lua-5.2.2-tests/api.lua b/lua-5.2.2-tests/api.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/api.lua
+++ /dev/null
@@ -1,1009 +0,0 @@
-
-if T==nil then
-  (Message or print)('\a\n >>> testC not active: skipping API tests <<<\n\a')
-  return
-end
-
-local debug = require "debug"
-
-local pack = table.pack
-
-
-function tcheck (t1, t2)
-  assert(t1.n == (t2.n or #t2) + 1)
-  for i = 2, t1.n do assert(t1[i] == t2[i - 1]) end
-end
-
-
-print('testing C API')
-
-a = T.testC("pushvalue R; return 1")
-assert(a == debug.getregistry())
-
-
--- absindex
-assert(T.testC("settop 10; absindex -1; return 1") == 10)
-assert(T.testC("settop 5; absindex -5; return 1") == 1)
-assert(T.testC("settop 10; absindex 1; return 1") == 1)
-assert(T.testC("settop 10; absindex R; return 1") < -10)
-
--- testing allignment
-a = T.d2s(12458954321123)
-assert(string.len(a) == 8)   -- sizeof(double)
-assert(T.s2d(a) == 12458954321123)
-
-a,b,c = T.testC("pushnum 1; pushnum 2; pushnum 3; return 2")
-assert(a == 2 and b == 3 and not c)
-
-f = T.makeCfunc("pushnum 1; pushnum 2; pushnum 3; return 2")
-a,b,c = f()
-assert(a == 2 and b == 3 and not c)
-
--- test that all trues are equal
-a,b,c = T.testC("pushbool 1; pushbool 2; pushbool 0; return 3")
-assert(a == b and a == true and c == false)
-a,b,c = T.testC"pushbool 0; pushbool 10; pushnil;\
-                      tobool -3; tobool -3; tobool -3; return 3"
-assert(a==false and b==true and c==false)
-
-
-a,b,c = T.testC("gettop; return 2", 10, 20, 30, 40)
-assert(a == 40 and b == 5 and not c)
-
-t = pack(T.testC("settop 5; gettop; return .", 2, 3))
-tcheck(t, {n=4,2,3})
-
-t = pack(T.testC("settop 0; settop 15; return 10", 3, 1, 23))
-assert(t.n == 10 and t[1] == nil and t[10] == nil)
-
-t = pack(T.testC("remove -2; gettop; return .", 2, 3, 4))
-tcheck(t, {n=2,2,4})
-
-t = pack(T.testC("insert -1; gettop; return .", 2, 3))
-tcheck(t, {n=2,2,3})
-
-t = pack(T.testC("insert 3; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=4,2,5,3,4})
-
-t = pack(T.testC("replace 2; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=3,5,3,4})
-
-t = pack(T.testC("replace -2; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=3,2,3,5})
-
-t = pack(T.testC("remove 3; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=3,2,4,5})
-
-t = pack(T.testC("copy 3 4; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=4,2,3,3,5})
-
-t = pack(T.testC("copy -3 -1; gettop; return .", 2, 3, 4, 5))
-tcheck(t, {n=4,2,3,4,3})
-
-
-
-
-t = pack(T.testC("insert 3; pushvalue 3; remove 3; pushvalue 2; remove 2; \
-                  insert 2; pushvalue 1; remove 1; insert 1; \
-      insert -2; pushvalue -2; remove -3; gettop; return .",
-      2, 3, 4, 5, 10, 40, 90))
-tcheck(t, {n=7,2,3,4,5,10,40,90})
-
-t = pack(T.testC("concat 5; gettop; return .", "alo", 2, 3, "joao", 12))
-tcheck(t, {n=1,"alo23joao12"})
-
--- testing MULTRET
-t = pack(T.testC("call 2,-1; gettop; return .",
-     function (a,b) return 1,2,3,4,a,b end, "alo", "joao"))
-tcheck(t, {n=6,1,2,3,4,"alo", "joao"})
-
-do  -- test returning more results than fit in the caller stack
-  local a = {}
-  for i=1,1000 do a[i] = true end; a[999] = 10
-  local b = T.testC([[pcall 1 -1; pop 1; tostring -1; return 1]],
-                    table.unpack, a)
-  assert(b == "10")
-end
-
-
--- testing globals
-_G.a = 14; _G.b = "a31"
-local a = {T.testC[[
-  getglobal a;
-  getglobal b;
-  getglobal b;
-  setglobal a;
-  gettop;
-  return .
-]]}
-assert(a[2] == 14 and a[3] == "a31" and a[4] == nil and _G.a == "a31")
-
-
--- testing arith
-assert(T.testC("pushnum 10; pushnum 20; arith /; return 1") == 0.5)
-assert(T.testC("pushnum 10; pushnum 20; arith -; return 1") == -10)
-assert(T.testC("pushnum 10; pushnum -20; arith *; return 1") == -200)
-assert(T.testC("pushnum 10; pushnum 3; arith ^; return 1") == 1000)
-assert(T.testC("pushnum 10; pushstring 20; arith /; return 1") == 0.5)
-assert(T.testC("pushstring 10; pushnum 20; arith -; return 1") == -10)
-assert(T.testC("pushstring 10; pushstring -20; arith *; return 1") == -200)
-assert(T.testC("pushstring 10; pushstring 3; arith ^; return 1") == 1000)
-a,b,c = T.testC([[pushnum 1;
-                  pushstring 10; arith _;
-                  pushstring 5; return 3]])
-assert(a == 1 and b == -10 and c == "5")
-mt = {__add = function (a,b) return setmetatable({a[1] + b[1]}, mt) end,
-      __mod = function (a,b) return setmetatable({a[1] % b[1]}, mt) end,
-      __unm = function (a) return setmetatable({a[1]* 2}, mt) end}
-a,b,c = setmetatable({4}, mt),
-        setmetatable({8}, mt),
-        setmetatable({-3}, mt)
-x,y,z = T.testC("arith +; return 2", 10, a, b)
-assert(x == 10 and y[1] == 12 and z == nil)
-assert(T.testC("arith %; return 1", a, c)[1] == 4%-3)
-assert(T.testC("arith _; arith +; arith %; return 1", b, a, c)[1] ==
-               8 % (4 + (-3)*2))
-
-
--- testing compare
--- EQ = 0; LT = 1; LE = 2
-
--- testing lessthan and lessequal
-assert(T.testC("compare 2 5 1, return 1", 3, 2, 2, 4, 2, 2))
-assert(T.testC("compare 2 5 2, return 1", 3, 2, 2, 4, 2, 2))
-assert(not T.testC("compare 3 4 1, return 1", 3, 2, 2, 4, 2, 2))
-assert(T.testC("compare 3 4 2, return 1", 3, 2, 2, 4, 2, 2))
-assert(T.testC("compare 5 2 1, return 1", 4, 2, 2, 3, 2, 2))
-assert(not T.testC("compare 2 -3 1, return 1", "4", "2", "2", "3", "2", "2"))
-assert(not T.testC("compare -3 2 1, return 1", "3", "2", "2", "4", "2", "2"))
-
--- non-valid indices produce false
-assert(not T.testC("compare 1 4 1, return 1"))
-assert(not T.testC("compare 9 1 2, return 1"))
-assert(not T.testC("compare 9 9 0, return 1"))
-
-local b = {__lt = function (a,b) return a[1] < b[1] end}
-local a1,a3,a4 = setmetatable({1}, b),
-                 setmetatable({3}, b),
-                 setmetatable({4}, b)
-assert(T.testC("compare 2 5 1, return 1", a3, 2, 2, a4, 2, 2))
-assert(T.testC("compare 2 5 2, return 1", a3, 2, 2, a4, 2, 2))
-assert(T.testC("compare 5 -6 1, return 1", a4, 2, 2, a3, 2, 2))
-a,b = T.testC("compare 5 -6 1, return 2", a1, 2, 2, a3, 2, 20)
-assert(a == 20 and b == false)
-a,b = T.testC("compare 5 -6 2, return 2", a1, 2, 2, a3, 2, 20)
-assert(a == 20 and b == false)
-a,b = T.testC("compare 5 -6 2, return 2", a1, 2, 2, a1, 2, 20)
-assert(a == 20 and b == true)
-
--- testing length
-local t = setmetatable({x = 20}, {__len = function (t) return t.x end})
-a,b,c = T.testC([[
-   len 2;
-   Llen 2;
-   objsize 2;
-   return 3
-]], t)
-assert(a == 20 and b == 20 and c == 0)
-
-t.x = "234"; t[1] = 20
-a,b,c = T.testC([[
-   len 2;
-   Llen 2;
-   objsize 2;
-   return 3
-]], t)
-assert(a == "234" and b == 234 and c == 1)
-
-t.x = print; t[1] = 20
-a,c = T.testC([[
-   len 2;
-   objsize 2;
-   return 2
-]], t)
-assert(a == print and c == 1)
-
-
--- testing __concat
-
-a = setmetatable({x="u"}, {__concat = function (a,b) return a.x..'.'..b.x end})
-x,y = T.testC([[
-  pushnum 5
-  pushvalue 2;
-  pushvalue 2;
-  concat 2;
-  pushvalue -2;
-  return 2;
-]], a, a)
-assert(x == a..a and y == 5)
-
--- concat with 0 elements
-assert(T.testC("concat 0; return 1") == "")
-
--- concat with 1 element
-assert(T.testC("concat 1; return 1", "xuxu") == "xuxu")
-
-
-
--- testing lua_is
-
-function B(x) return x and 1 or 0 end
-
-function count (x, n)
-  n = n or 2
-  local prog = [[
-    isnumber %d;
-    isstring %d;
-    isfunction %d;
-    iscfunction %d;
-    istable %d;
-    isuserdata %d;
-    isnil %d;
-    isnull %d;
-    return 8
-  ]]
-  prog = string.format(prog, n, n, n, n, n, n, n, n)
-  local a,b,c,d,e,f,g,h = T.testC(prog, x)
-  return B(a)+B(b)+B(c)+B(d)+B(e)+B(f)+B(g)+(100*B(h))
-end
-
-assert(count(3) == 2)
-assert(count('alo') == 1)
-assert(count('32') == 2)
-assert(count({}) == 1)
-assert(count(print) == 2)
-assert(count(function () end) == 1)
-assert(count(nil) == 1)
-assert(count(io.stdin) == 1)
-assert(count(nil, 15) == 100)
-
-
--- testing lua_to...
-
-function to (s, x, n)
-  n = n or 2
-  return T.testC(string.format("%s %d; return 1", s, n), x)
-end
-
-assert(to("tostring", {}) == nil)
-assert(to("tostring", "alo") == "alo")
-assert(to("tostring", 12) == "12")
-assert(to("tostring", 12, 3) == nil)
-assert(to("objsize", {}) == 0)
-assert(to("objsize", {1,2,3}) == 3)
-assert(to("objsize", "alo\0\0a") == 6)
-assert(to("objsize", T.newuserdata(0)) == 0)
-assert(to("objsize", T.newuserdata(101)) == 101)
-assert(to("objsize", 124) == 0)
-assert(to("objsize", true) == 0)
-assert(to("tonumber", {}) == 0)
-assert(to("tonumber", "12") == 12)
-assert(to("tonumber", "s2") == 0)
-assert(to("tonumber", 1, 20) == 0)
-assert(to("topointer", 10) == 0)
-assert(to("topointer", true) == 0)
-assert(to("topointer", T.pushuserdata(20)) == 20)
-assert(to("topointer", io.read) ~= 0)
-assert(to("func2num", 20) == 0)
-assert(to("func2num", T.pushuserdata(10)) == 0)
-assert(to("func2num", io.read) ~= 0)
-a = to("tocfunction", math.deg)
-assert(a(3) == math.deg(3) and a == math.deg)
-
-
-
--- testing deep C stack
-do
-  collectgarbage("stop")
-  local s, msg = pcall(T.testC, "checkstack 1000023 XXXX")   -- too deep
-  assert(not s and string.find(msg, "XXXX"))
-  s = string.rep("pushnil;checkstack 1 XX;", 1000000)
-  s, msg = pcall(T.testC, s)
-  assert(not s and string.find(msg, "XX"))
-  collectgarbage("restart")
-end
-
-local prog = {"checkstack 30000 msg", "newtable"}
-for i = 1,12000 do
-  prog[#prog + 1] = "pushnum " .. i
-  prog[#prog + 1] = "pushnum " .. i * 10
-end
-
-prog[#prog + 1] = "rawgeti R 2"   -- get global table in registry
-prog[#prog + 1] = "insert " .. -(2*12000 + 2)
-
-for i = 1,12000 do
-  prog[#prog + 1] = "settable " .. -(2*(12000 - i + 1) + 1)
-end
-
-prog[#prog + 1] = "return 2"
-
-prog = table.concat(prog, ";")
-local g, t = T.testC(prog)
-assert(g == _G)
-for i = 1,12000 do assert(t[i] == i*10); t[i] = nil end
-assert(next(t) == nil)
-prog, g, t = nil
-
--- testing errors
-
-a = T.testC([[
-  loadstring 2; pcall 0,1;
-  pushvalue 3; insert -2; pcall 1, 1;
-  pcall 0, 0;
-  return 1
-]], "x=150", function (a) assert(a==nil); return 3 end)
-
-assert(type(a) == 'string' and x == 150)
-
-function check3(p, ...)
-  local arg = {...}
-  assert(#arg == 3)
-  assert(string.find(arg[3], p))
-end
-check3(":1:", T.testC("loadstring 2; gettop; return .", "x="))
-check3("cannot read", T.testC("loadfile 2; gettop; return .", "."))
-check3("cannot open xxxx", T.testC("loadfile 2; gettop; return .", "xxxx"))
-
--- test errors in non protected threads
-function checkerrnopro (code, msg)
-  L = coroutine.create(function () end)
-  local stt, err = pcall(T.testC, code)
-  assert(not stt and string.find(err, msg))
-end
-
-checkerrnopro("pushnum 3; call 0 0", "attempt to call")
-function f () f() end
-checkerrnopro("getglobal 'f'; call 0 0;", "stack overflow")
-
-
--- testing table access
-
-a = {x=0, y=12}
-x, y = T.testC("gettable 2; pushvalue 4; gettable 2; return 2",
-                a, 3, "y", 4, "x")
-assert(x == 0 and y == 12)
-T.testC("settable -5", a, 3, 4, "x", 15)
-assert(a.x == 15)
-a[a] = print
-x = T.testC("gettable 2; return 1", a)  -- table and key are the same object!
-assert(x == print)
-T.testC("settable 2", a, "x")    -- table and key are the same object!
-assert(a[a] == "x")
-
-b = setmetatable({p = a}, {})
-getmetatable(b).__index = function (t, i) return t.p[i] end
-k, x = T.testC("gettable 3, return 2", 4, b, 20, 35, "x")
-assert(x == 15 and k == 35)
-getmetatable(b).__index = function (t, i) return a[i] end
-getmetatable(b).__newindex = function (t, i,v ) a[i] = v end
-y = T.testC("insert 2; gettable -5; return 1", 2, 3, 4, "y", b)
-assert(y == 12)
-k = T.testC("settable -5, return 1", b, 3, 4, "x", 16)
-assert(a.x == 16 and k == 4)
-a[b] = 'xuxu'
-y = T.testC("gettable 2, return 1", b)
-assert(y == 'xuxu')
-T.testC("settable 2", b, 19)
-assert(a[b] == 19)
-
--- testing next
-a = {}
-t = pack(T.testC("next; gettop; return .", a, nil))
-tcheck(t, {n=1,a})
-a = {a=3}
-t = pack(T.testC("next; gettop; return .", a, nil))
-tcheck(t, {n=3,a,'a',3})
-t = pack(T.testC("next; pop 1; next; gettop; return .", a, nil))
-tcheck(t, {n=1,a})
-
-
-
--- testing upvalues
-
-do
-  local A = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
-  t, b, c = A([[pushvalue U0; pushvalue U1; pushvalue U2; return 3]])
-  assert(b == 10 and c == 20 and type(t) == 'table')
-  a, b = A([[tostring U3; tonumber U4; return 2]])
-  assert(a == nil and b == 0)
-  A([[pushnum 100; pushnum 200; replace U2; replace U1]])
-  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
-  assert(b == 100 and c == 200)
-  A([[replace U2; replace U1]], {x=1}, {x=2})
-  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
-  assert(b.x == 1 and c.x == 2)
-  T.checkmemory()
-end
-
-
--- testing absent upvalues from C-function pointers
-assert(T.testC[[isnull U1; return 1]] == true)
-assert(T.testC[[isnull U100; return 1]] == true)
-assert(T.testC[[pushvalue U1; return 1]] == nil)
-
-local f = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
-assert(T.upvalue(f, 1) == 10 and
-       T.upvalue(f, 2) == 20 and
-       T.upvalue(f, 3) == nil)
-T.upvalue(f, 2, "xuxu")
-assert(T.upvalue(f, 2) == "xuxu")
-
-
--- large closures
-do
-  local A = "checkstack 300 msg;" ..
-            string.rep("pushnum 10;", 255) ..
-            "pushcclosure 255; return 1"
-  A = T.testC(A)
-  for i=1,255 do
-    assert(A(("pushvalue U%d; return 1"):format(i)) == 10)
-  end
-  assert(A("isnull U256; return 1"))
-  assert(not A("isnil U256; return 1"))
-end
-  
-
-
--- bug in 5.1.2
-assert(not pcall(debug.setuservalue, 3, {}))
-assert(not pcall(debug.setuservalue, nil, {}))
-assert(not pcall(debug.setuservalue, T.pushuserdata(1), {}))
-
-local b = T.newuserdata(0)
-local a = {}
-assert(debug.getuservalue(b) == nil)
-assert(debug.setuservalue(b, a))
-assert(debug.getuservalue(b) == a)
-assert(debug.setuservalue(b, nil))
-assert(debug.getuservalue(b) == nil)
-
-assert(debug.getuservalue(4) == nil)
-
-
-
--- testing locks (refs)
-
--- reuse of references
-local i = T.ref{}
-T.unref(i)
-assert(T.ref{} == i)
-
-Arr = {}
-Lim = 100
-for i=1,Lim do   -- lock many objects
-  Arr[i] = T.ref({})
-end
-
-assert(T.ref(nil) == -1 and T.getref(-1) == nil)
-T.unref(-1); T.unref(-1)
-
-for i=1,Lim do   -- unlock all them
-  T.unref(Arr[i])
-end
-
-function printlocks ()
-  local f = T.makeCfunc("gettable R; return 1")
-  local n = f("n")
-  print("n", n)
-  for i=0,n do
-    print(i, f(i))
-  end
-end
-
-
-for i=1,Lim do   -- lock many objects
-  Arr[i] = T.ref({})
-end
-
-for i=1,Lim,2 do   -- unlock half of them
-  T.unref(Arr[i])
-end
-
-assert(type(T.getref(Arr[2])) == 'table')
-
-
-assert(T.getref(-1) == nil)
-
-
-a = T.ref({})
-
-collectgarbage()
-
-assert(type(T.getref(a)) == 'table')
-
-
--- colect in cl the `val' of all collected userdata
-tt = {}
-cl = {n=0}
-A = nil; B = nil
-local F
-F = function (x)
-  local udval = T.udataval(x)
-  table.insert(cl, udval)
-  local d = T.newuserdata(100)   -- cria lixo
-  d = nil
-  assert(debug.getmetatable(x).__gc == F)
-  assert(load("table.insert({}, {})"))()   -- cria mais lixo
-  collectgarbage()   -- forca coleta de lixo durante coleta!
-  assert(debug.getmetatable(x).__gc == F)   -- coleta anterior nao melou isso?
-  local dummy = {}    -- cria lixo durante coleta
-  if A ~= nil then
-    assert(type(A) == "userdata")
-    assert(T.udataval(A) == B)
-    debug.getmetatable(A)    -- just acess it
-  end
-  A = x   -- ressucita userdata
-  B = udval
-  return 1,2,3
-end
-tt.__gc = F
-
--- test whether udate collection frees memory in the right time
-do
-  collectgarbage();
-  collectgarbage();
-  local x = collectgarbage("count");
-  local a = T.newuserdata(5001)
-  assert(T.testC("objsize 2; return 1", a) == 5001)
-  assert(collectgarbage("count") >= x+4) 
-  a = nil
-  collectgarbage();
-  assert(collectgarbage("count") <= x+1)
-  -- udata without finalizer
-  x = collectgarbage("count")
-  collectgarbage("stop")
-  for i=1,1000 do T.newuserdata(0) end
-  assert(collectgarbage("count") > x+10)
-  collectgarbage()
-  assert(collectgarbage("count") <= x+1)
-  -- udata with finalizer
-  x = collectgarbage("count")
-  collectgarbage()
-  collectgarbage("stop")
-  a = {__gc = function () end}
-  for i=1,1000 do debug.setmetatable(T.newuserdata(0), a) end
-  assert(collectgarbage("count") >= x+10)
-  collectgarbage()  -- this collection only calls TM, without freeing memory
-  assert(collectgarbage("count") >= x+10)
-  collectgarbage()  -- now frees memory
-  assert(collectgarbage("count") <= x+1)
-  collectgarbage("restart")
-end
-
-
-collectgarbage("stop")
-
--- create 3 userdatas with tag `tt'
-a = T.newuserdata(0); debug.setmetatable(a, tt); na = T.udataval(a)
-b = T.newuserdata(0); debug.setmetatable(b, tt); nb = T.udataval(b)
-c = T.newuserdata(0); debug.setmetatable(c, tt); nc = T.udataval(c)
-
--- create userdata without meta table
-x = T.newuserdata(4)
-y = T.newuserdata(0)
-
-assert(not pcall(io.input, a))
-assert(not pcall(io.input, x))
-
-assert(debug.getmetatable(x) == nil and debug.getmetatable(y) == nil)
-
-d=T.ref(a);
-e=T.ref(b);
-f=T.ref(c);
-t = {T.getref(d), T.getref(e), T.getref(f)}
-assert(t[1] == a and t[2] == b and t[3] == c)
-
-t=nil; a=nil; c=nil;
-T.unref(e); T.unref(f)
-
-collectgarbage()
-
--- check that unref objects have been collected
-assert(#cl == 1 and cl[1] == nc)
-
-x = T.getref(d)
-assert(type(x) == 'userdata' and debug.getmetatable(x) == tt)
-x =nil
-tt.b = b  -- create cycle
-tt=nil    -- frees tt for GC
-A = nil
-b = nil
-T.unref(d);
-n5 = T.newuserdata(0)
-debug.setmetatable(n5, {__gc=F})
-n5 = T.udataval(n5)
-collectgarbage()
-assert(#cl == 4)
--- check order of collection
-assert(cl[2] == n5 and cl[3] == nb and cl[4] == na)
-
-collectgarbage"restart"
-
-
-a, na = {}, {}
-for i=30,1,-1 do
-  a[i] = T.newuserdata(0)
-  debug.setmetatable(a[i], {__gc=F})
-  na[i] = T.udataval(a[i])
-end
-cl = {}
-a = nil; collectgarbage()
-assert(#cl == 30)
-for i=1,30 do assert(cl[i] == na[i]) end
-na = nil
-
-
-for i=2,Lim,2 do   -- unlock the other half
-  T.unref(Arr[i])
-end
-
-x = T.newuserdata(41); debug.setmetatable(x, {__gc=F})
-assert(T.testC("objsize 2; return 1", x) == 41)
-cl = {}
-a = {[x] = 1}
-x = T.udataval(x)
-collectgarbage()
--- old `x' cannot be collected (`a' still uses it)
-assert(#cl == 0)
-for n in pairs(a) do a[n] = nil end
-collectgarbage()
-assert(#cl == 1 and cl[1] == x)   -- old `x' must be collected
-
--- testing lua_equal
-assert(T.testC("compare 2 4 0; return 1", print, 1, print, 20))
-assert(T.testC("compare 3 2 0; return 1", 'alo', "alo"))
-assert(T.testC("compare 2 3 0; return 1", nil, nil))
-assert(not T.testC("compare 2 3 0; return 1", {}, {}))
-assert(not T.testC("compare 2 3 0; return 1"))
-assert(not T.testC("compare 2 3 0; return 1", 3))
-
--- testing lua_equal with fallbacks
-do
-  local map = {}
-  local t = {__eq = function (a,b) return map[a] == map[b] end}
-  local function f(x)
-    local u = T.newuserdata(0)
-    debug.setmetatable(u, t)
-    map[u] = x
-    return u
-  end
-  assert(f(10) == f(10))
-  assert(f(10) ~= f(11))
-  assert(T.testC("compare 2 3 0; return 1", f(10), f(10)))
-  assert(not T.testC("compare 2 3 0; return 1", f(10), f(20)))
-  t.__eq = nil
-  assert(f(10) ~= f(10))
-end
-
-print'+'
-
-
-
--- testing changing hooks during hooks
-_G.t = {}
-T.sethook([[
-  # set a line hook after 3 count hooks
-  sethook 4 0 '
-    getglobal t;
-    pushvalue -3; append -2
-    pushvalue -2; append -2
-  ']], "c", 3)
-local a = 1   -- counting
-a = 1   -- counting
-a = 1   -- count hook (set line hook)
-a = 1   -- line hook
-a = 1   -- line hook
-debug.sethook()
-t = _G.t
-assert(t[1] == "line")
-line = t[2]
-assert(t[3] == "line" and t[4] == line + 1)
-assert(t[5] == "line" and t[6] == line + 2)
-assert(t[7] == nil)
-
-
--------------------------------------------------------------------------
-do   -- testing errors during GC
-  local a = {}
-  for i=1,20 do
-    a[i] = T.newuserdata(i)   -- creates several udata
-  end
-  for i=1,20,2 do   -- mark half of them to raise errors during GC
-    debug.setmetatable(a[i], {__gc = function (x) error("error inside gc") end})
-  end
-  for i=2,20,2 do   -- mark the other half to count and to create more garbage
-    debug.setmetatable(a[i], {__gc = function (x) load("A=A+1")() end})
-  end
-  _G.A = 0
-  a = 0
-  while 1 do
-    local stat, msg = pcall(collectgarbage)
-    if stat then
-      break   -- stop when no more errors
-    else
-      a = a + 1
-      assert(string.find(msg, "__gc"))
-    end
-  end
-  assert(a == 10)  -- number of errors
-
-  assert(A == 10)  -- number of normal collections
-end
--------------------------------------------------------------------------
--- test for userdata vals
-do
-  local a = {}; local lim = 30
-  for i=0,lim do a[i] = T.pushuserdata(i) end
-  for i=0,lim do assert(T.udataval(a[i]) == i) end
-  for i=0,lim do assert(T.pushuserdata(i) == a[i]) end
-  for i=0,lim do a[a[i]] = i end
-  for i=0,lim do a[T.pushuserdata(i)] = i end
-  assert(type(tostring(a[1])) == "string")
-end
-
-
--------------------------------------------------------------------------
--- testing multiple states
-T.closestate(T.newstate());
-L1 = T.newstate()
-assert(L1)
-
-assert(T.doremote(L1, "X='a'; return 'a'") == 'a')
-
-
-assert(#pack(T.doremote(L1, "function f () return 'alo', 3 end; f()")) == 0)
-
-a, b = T.doremote(L1, "return f()")
-assert(a == 'alo' and b == '3')
-
-T.doremote(L1, "_ERRORMESSAGE = nil")
--- error: `sin' is not defined
-a, _, b = T.doremote(L1, "return sin(1)")
-assert(a == nil and b == 2)   -- 2 == run-time error
-
--- error: syntax error
-a, b, c = T.doremote(L1, "return a+")
-assert(a == nil and c == 3 and type(b) == "string")   -- 3 == syntax error
-
-T.loadlib(L1)
-a, b, c = T.doremote(L1, [[
-  string = require'string'
-  a = require'_G'; assert(a == _G and require("_G") == a)
-  io = require'io'; assert(type(io.read) == "function")
-  assert(require("io") == io)
-  a = require'table'; assert(type(a.insert) == "function")
-  a = require'debug'; assert(type(a.getlocal) == "function")
-  a = require'math'; assert(type(a.sin) == "function")
-  return string.sub('okinama', 1, 2)
-]])
-assert(a == "ok")
-
-T.closestate(L1);
-
-
-L1 = T.newstate()
-T.loadlib(L1)
-T.doremote(L1, "a = {}")
-T.testC(L1, [[getglobal "a"; pushstring "x"; pushnum 1;
-             settable -3]])
-assert(T.doremote(L1, "return a.x") == "1")
-
-T.closestate(L1)
-
-L1 = nil
-
-print('+')
-
--------------------------------------------------------------------------
--- testing memory limits
--------------------------------------------------------------------------
-assert(not pcall(T.newuserdata, 2^32-4))
-collectgarbage()
-T.totalmem(T.totalmem()+5000)   -- set low memory limit (+5k)
-assert(not pcall(load"local a={}; for i=1,100000 do a[i]=i end"))
-T.totalmem(1000000000)          -- restore high limit
-
--- test memory errors; increase memory limit in small steps, so that
--- we get memory errors in different parts of a given task, up to there
--- is enough memory to complete the task without errors
-function testamem (s, f)
-  collectgarbage(); collectgarbage()
-  local M = T.totalmem()
-  local oldM = M
-  local a,b = nil
-  while 1 do
-    M = M+7   -- increase memory limit in small steps
-    T.totalmem(M)
-    a, b = pcall(f)
-    T.totalmem(1000000000)  -- restore high limit
-    if a and b then break end       -- stop when no more errors
-    collectgarbage()
-    if not a and not    -- `real' error?
-      (string.find(b, "memory") or string.find(b, "overflow")) then
-      error(b, 0)   -- propagate it
-    end
-  end
-  print("\nlimit for " .. s .. ": " .. M-oldM)
-  return b
-end
-
-
--- testing memory errors when creating a new state
-
-b = testamem("state creation", T.newstate)
-T.closestate(b);  -- close new state
-
-
--- testing threads
-
--- get main thread from registry (at index LUA_RIDX_MAINTHREAD == 1)
-mt = T.testC("rawgeti R 1; return 1")
-assert(type(mt) == "thread" and coroutine.running() == mt)
-
-
-
-function expand (n,s)
-  if n==0 then return "" end
-  local e = string.rep("=", n)
-  return string.format("T.doonnewstack([%s[ %s;\n collectgarbage(); %s]%s])\n",
-                              e, s, expand(n-1,s), e)
-end
-
-G=0; collectgarbage(); a =collectgarbage("count")
-load(expand(20,"G=G+1"))()
-assert(G==20); collectgarbage();  -- assert(gcinfo() <= a+1)
-
-testamem("thread creation", function ()
-  return T.doonnewstack("x=1") == 0  -- try to create thread
-end)
-
-
--- testing memory x compiler
-
-testamem("loadstring", function ()
-  return load("x=1")  -- try to do load a string
-end)
-
-
-local testprog = [[
-local function foo () return end
-local t = {"x"}
-a = "aaa"
-for i = 1, #t do a=a..t[i] end
-return true
-]]
-
--- testing memory x dofile
-_G.a = nil
-local t =os.tmpname()
-local f = assert(io.open(t, "w"))
-f:write(testprog)
-f:close()
-testamem("dofile", function ()
-  local a = loadfile(t)
-  return a and a()
-end)
-assert(os.remove(t))
-assert(_G.a == "aaax")
-
-
--- other generic tests
-
-testamem("string creation", function ()
-  local a, b = string.gsub("alo alo", "(a)", function (x) return x..'b' end)
-  return (a == 'ablo ablo')
-end)
-
-testamem("dump/undump", function ()
-  local a = load(testprog)
-  local b = a and string.dump(a)
-  a = b and load(b)
-  return a and a()
-end)
-
-local t = os.tmpname()
-testamem("file creation", function ()
-  local f = assert(io.open(t, 'w'))
-  assert (not io.open"nomenaoexistente")
-  io.close(f);
-  return not loadfile'nomenaoexistente'
-end)
-assert(os.remove(t))
-
-testamem("table creation", function ()
-  local a, lim = {}, 10
-  for i=1,lim do a[i] = i; a[i..'a'] = {} end
-  return (type(a[lim..'a']) == 'table' and a[lim] == lim)
-end)
-
-testamem("constructors", function ()
-  local a = {10, 20, 30, 40, 50; a=1, b=2, c=3, d=4, e=5}
-  return (type(a) == 'table' and a.e == 5)
-end)
-
-local a = 1
-close = nil
-testamem("closure creation", function ()
-  function close (b,c)
-   return function (x) return a+b+c+x end
-  end
-  return (close(2,3)(4) == 10)
-end)
-
-testamem("coroutines", function ()
-  local a = coroutine.wrap(function ()
-              coroutine.yield(string.rep("a", 10))
-              return {}
-            end)
-  assert(string.len(a()) == 10)
-  return a()
-end)
-
-print'+'
-
--- testing some auxlib functions
-local function gsub (a, b, c)
-  a, b = T.testC("gsub 2 3 4; gettop; return 2", a, b, c)
-  assert(b == 5)
-  return a
-end
-
-assert(gsub("alo.alo.uhuh.", ".", "//") == "alo//alo//uhuh//")
-assert(gsub("alo.alo.uhuh.", "alo", "//") == "//.//.uhuh.")
-assert(gsub("", "alo", "//") == "")
-assert(gsub("...", ".", "/.") == "/././.")
-assert(gsub("...", "...", "") == "")
-
-
--- testing luaL_newmetatable
-local mt_xuxu, res, top = T.testC("newmetatable xuxu; gettop; return 3")
-assert(type(mt_xuxu) == "table" and res and top == 3)
-local d, res, top = T.testC("newmetatable xuxu; gettop; return 3")
-assert(mt_xuxu == d and not res and top == 3)
-d, res, top = T.testC("newmetatable xuxu1; gettop; return 3")
-assert(mt_xuxu ~= d and res and top == 3)
-
-x = T.newuserdata(0);
-y = T.newuserdata(0);
-T.testC("pushstring xuxu; gettable R; setmetatable 2", x)
-assert(getmetatable(x) == mt_xuxu)
-
--- testing luaL_testudata
--- correct metatable
-local res1, res2, top = T.testC([[testudata -1 xuxu
-   	 			  testudata 2 xuxu
-				  gettop
-				  return 3]], x)
-assert(res1 and res2 and top == 4)
-
--- wrong metatable
-res1, res2, top = T.testC([[testudata -1 xuxu1
-			    testudata 2 xuxu1
-			    gettop
-			    return 3]], x)
-assert(not res1 and not res2 and top == 4)
-
--- non-existent type
-res1, res2, top = T.testC([[testudata -1 xuxu2
-			    testudata 2 xuxu2
-			    gettop
-			    return 3]], x)
-assert(not res1 and not res2 and top == 4)
-
--- userdata has no metatable
-res1, res2, top = T.testC([[testudata -1 xuxu
-			    testudata 2 xuxu
-			    gettop
-			    return 3]], y)
-assert(not res1 and not res2 and top == 4)
-
--- erase metatables
-do
-  local r = debug.getregistry()
-  assert(r.xuxu == mt_xuxu and r.xuxu1 == d)
-  r.xuxu = nil; r.xuxu1 = nil
-end
-
-print'OK'
-
diff --git a/lua-5.2.2-tests/attrib.lua b/lua-5.2.2-tests/attrib.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/attrib.lua
+++ /dev/null
@@ -1,421 +0,0 @@
--- The tests for 'require' assume some specific directories and libraries;
--- better to avoid them in generic machines
-
-if not _port then --[
-
-print "testing require"
-
-assert(require"string" == string)
-assert(require"math" == math)
-assert(require"table" == table)
-assert(require"io" == io)
-assert(require"os" == os)
-assert(require"coroutine" == coroutine)
-
-assert(type(package.path) == "string")
-assert(type(package.cpath) == "string")
-assert(type(package.loaded) == "table")
-assert(type(package.preload) == "table")
-
-assert(type(package.config) == "string")
-print("package config: "..string.gsub(package.config, "\n", "|"))
-
-do
-  -- create a path with 'max' templates,
-  -- each with 1-10 repetitions of '?'
-  local max = 2000
-  local t = {}
-  for i = 1,max do t[i] = string.rep("?", i%10 + 1) end
-  t[#t + 1] = ";"    -- empty template
-  local path = table.concat(t, ";")
-  -- use that path in a search
-  local s, err = package.searchpath("xuxu", path)
-  -- search fails; check that message has an occurence of
-  -- '??????????' with ? replaced by xuxu and at least 'max' lines
-  assert(not s and
-         string.find(err, string.rep("xuxu", 10)) and
-         #string.gsub(err, "[^\n]", "") >= max)
-  -- path with one very long template
-  local path = string.rep("?", max)
-  local s, err = package.searchpath("xuxu", path)
-  assert(not s and string.find(err, string.rep('xuxu', max)))
-end
-
-do
-  local oldpath = package.path
-  package.path = {}
-  local s, err = pcall(require, "no-such-file")
-  assert(not s and string.find(err, "package.path"))
-  package.path = oldpath
-end
-
-print('+')
-
--- auxiliary directory with C modules and temporary files
-local DIR = "libs/"
-
--- prepend DIR to a name
-local function D (x) return DIR .. x end
-
-
-local function createfiles (files, preextras, posextras)
-  for n,c in pairs(files) do
-    io.output(D(n))
-    io.write(string.format(preextras, n))
-    io.write(c)
-    io.write(string.format(posextras, n))
-    io.close(io.output())
-  end
-end
-
-function removefiles (files)
-  for n in pairs(files) do
-    os.remove(D(n))
-  end
-end
-
-local files = {
-  ["names.lua"] = "do return {...} end\n",
-  ["err.lua"] = "B = 15; a = a + 1;",
-  ["A.lua"] = "",
-  ["B.lua"] = "assert(...=='B');require 'A'",
-  ["A.lc"] = "",
-  ["A"] = "",
-  ["L"] = "",
-  ["XXxX"] = "",
-  ["C.lua"] = "package.loaded[...] = 25; require'C'"
-}
-
-AA = nil
-local extras = [[
-NAME = '%s'
-REQUIRED = ...
-return AA]]
-
-createfiles(files, "", extras)
-
--- testing explicit "dir" separator in 'searchpath'
-assert(package.searchpath("C.lua", D"?", "", "") == D"C.lua")
-assert(package.searchpath("C.lua", D"?", ".", ".") == D"C.lua")
-assert(package.searchpath("--x-", D"?", "-", "X") == D"XXxX")
-assert(package.searchpath("---xX", D"?", "---", "XX") == D"XXxX")
-assert(package.searchpath(D"C.lua", "?", "/") == D"C.lua")
-assert(package.searchpath(".\\C.lua", D"?", "\\") == D"./C.lua")
-
-local oldpath = package.path
-
-package.path = string.gsub("D/?.lua;D/?.lc;D/?;D/??x?;D/L", "D/", DIR)
-
-local try = function (p, n, r)
-  NAME = nil
-  local rr = require(p)
-  assert(NAME == n)
-  assert(REQUIRED == p)
-  assert(rr == r)
-end
-
-a = require"names"
-assert(a[1] == "names" and a[2] == D"names.lua")
-
-_G.a = nil
-assert(not pcall(require, "err"))
-assert(B == 15)
-
-assert(package.searchpath("C", package.path) == D"C.lua")
-assert(require"C" == 25)
-assert(require"C" == 25)
-AA = nil
-try('B', 'B.lua', true)
-assert(package.loaded.B)
-assert(require"B" == true)
-assert(package.loaded.A)
-assert(require"C" == 25)
-package.loaded.A = nil
-try('B', nil, true)   -- should not reload package
-try('A', 'A.lua', true)
-package.loaded.A = nil
-os.remove(D'A.lua')
-AA = {}
-try('A', 'A.lc', AA)  -- now must find second option
-assert(package.searchpath("A", package.path) == D"A.lc")
-assert(require("A") == AA)
-AA = false
-try('K', 'L', false)     -- default option
-try('K', 'L', false)     -- default option (should reload it)
-assert(rawget(_G, "_REQUIREDNAME") == nil)
-
-AA = "x"
-try("X", "XXxX", AA)
-
-
-removefiles(files)
-
-
--- testing require of sub-packages
-
-local _G = _G
-
-package.path = string.gsub("D/?.lua;D/?/init.lua", "D/", DIR)
-
-files = {
-  ["P1/init.lua"] = "AA = 10",
-  ["P1/xuxu.lua"] = "AA = 20",
-}
-
-createfiles(files, "_ENV = {}\n", "\nreturn _ENV\n")
-AA = 0
-
-local m = assert(require"P1")
-assert(AA == 0 and m.AA == 10)
-assert(require"P1" == m)
-assert(require"P1" == m)
-
-assert(package.searchpath("P1.xuxu", package.path) == D"P1/xuxu.lua")
-m.xuxu = assert(require"P1.xuxu")
-assert(AA == 0 and m.xuxu.AA == 20)
-assert(require"P1.xuxu" == m.xuxu)
-assert(require"P1.xuxu" == m.xuxu)
-assert(require"P1" == m and m.AA == 10)
-
-
-removefiles(files)
-
-
-package.path = ""
-assert(not pcall(require, "file_does_not_exist"))
-package.path = "??\0?"
-assert(not pcall(require, "file_does_not_exist1"))
-
-package.path = oldpath
-
--- check 'require' error message
-local fname = "file_does_not_exist2"
-local m, err = pcall(require, fname)
-for t in string.gmatch(package.path..";"..package.cpath, "[^;]+") do
-  t = string.gsub(t, "?", fname)
-  assert(string.find(err, t, 1, true))
-end
-
-
-local function import(...)
-  local f = {...}
-  return function (m)
-    for i=1, #f do m[f[i]] = _G[f[i]] end
-  end
-end
-
--- cannot change environment of a C function
-assert(not pcall(module, 'XUXU'))
-
-
-
--- testing require of C libraries
-
-
-local p = ""   -- On Mac OS X, redefine this to "_"
-
--- check whether loadlib works in this system
-local st, err, when = package.loadlib(D"lib1.so", "*")
-if not st then
-  local f, err, when = package.loadlib("donotexist", p.."xuxu")
-  assert(not f and type(err) == "string" and when == "absent")
-  ;(Message or print)('\a\n >>> cannot load dynamic library <<<\n\a')
-  print(err, when)
-else
-  -- tests for loadlib
-  local f = assert(package.loadlib(D"lib1.so", p.."onefunction"))
-  local a, b = f(15, 25)
-  assert(a == 25 and b == 15)
-
-  f = assert(package.loadlib(D"lib1.so", p.."anotherfunc"))
-  assert(f(10, 20) == "1020\n")
-
-  -- check error messages
-  local f, err, when = package.loadlib(D"lib1.so", p.."xuxu")
-  assert(not f and type(err) == "string" and when == "init")
-  f, err, when = package.loadlib("donotexist", p.."xuxu")
-  assert(not f and type(err) == "string" and when == "open")
-
-  -- symbols from 'lib1' must be visible to other libraries
-  f = assert(package.loadlib(D"lib11.so", p.."luaopen_lib11"))
-  assert(f() == "exported")
-
-  -- test C modules with prefixes in names
-  package.cpath = D"?.so"
-  local lib2 = require"v-lib2"
-  -- check correct access to global environment and correct
-  -- parameters
-  assert(_ENV.x == "v-lib2" and _ENV.y == D"v-lib2.so")
-  assert(lib2.id("x") == "x")
-
-  -- test C submodules
-  local fs = require"lib1.sub"
-  assert(_ENV.x == "lib1.sub" and _ENV.y == D"lib1.so")
-  assert(fs.id(45) == 45)
-end
-
-_ENV = _G
-
-
--- testing preload
-
-do
-  local p = package
-  package = {}
-  p.preload.pl = function (...)
-    local _ENV = {...}
-    function xuxu (x) return x+20 end
-    return _ENV
-  end
-
-  local pl = require"pl"
-  assert(require"pl" == pl)
-  assert(pl.xuxu(10) == 30)
-  assert(pl[1] == "pl" and pl[2] == nil)
-
-  package = p
-  assert(type(package.path) == "string")
-end
-
-print('+')
-
-end  --]
-
-print("testing assignments, logical operators, and constructors")
-
-local res, res2 = 27
-
-a, b = 1, 2+3
-assert(a==1 and b==5)
-a={}
-function f() return 10, 11, 12 end
-a.x, b, a[1] = 1, 2, f()
-assert(a.x==1 and b==2 and a[1]==10)
-a[f()], b, a[f()+3] = f(), a, 'x'
-assert(a[10] == 10 and b == a and a[13] == 'x')
-
-do
-  local f = function (n) local x = {}; for i=1,n do x[i]=i end;
-                         return table.unpack(x) end;
-  local a,b,c
-  a,b = 0, f(1)
-  assert(a == 0 and b == 1)
-  A,b = 0, f(1)
-  assert(A == 0 and b == 1)
-  a,b,c = 0,5,f(4)
-  assert(a==0 and b==5 and c==1)
-  a,b,c = 0,5,f(0)
-  assert(a==0 and b==5 and c==nil)
-end
-
-a, b, c, d = 1 and nil, 1 or nil, (1 and (nil or 1)), 6
-assert(not a and b and c and d==6)
-
-d = 20
-a, b, c, d = f()
-assert(a==10 and b==11 and c==12 and d==nil)
-a,b = f(), 1, 2, 3, f()
-assert(a==10 and b==1)
-
-assert(a<b == false and a>b == true)
-assert((10 and 2) == 2)
-assert((10 or 2) == 10)
-assert((10 or assert(nil)) == 10)
-assert(not (nil and assert(nil)))
-assert((nil or "alo") == "alo")
-assert((nil and 10) == nil)
-assert((false and 10) == false)
-assert((true or 10) == true)
-assert((false or 10) == 10)
-assert(false ~= nil)
-assert(nil ~= false)
-assert(not nil == true)
-assert(not not nil == false)
-assert(not not 1 == true)
-assert(not not a == true)
-assert(not not (6 or nil) == true)
-assert(not not (nil and 56) == false)
-assert(not not (nil and true) == false)
-
-assert({} ~= {})
-print('+')
-
-a = {}
-a[true] = 20
-a[false] = 10
-assert(a[1<2] == 20 and a[1>2] == 10)
-
-function f(a) return a end
-
-local a = {}
-for i=3000,-3000,-1 do a[i] = i; end
-a[10e30] = "alo"; a[true] = 10; a[false] = 20
-assert(a[10e30] == 'alo' and a[not 1] == 20 and a[10<20] == 10)
-for i=3000,-3000,-1 do assert(a[i] == i); end
-a[print] = assert
-a[f] = print
-a[a] = a
-assert(a[a][a][a][a][print] == assert)
-a[print](a[a[f]] == a[print])
-assert(not pcall(function () local a = {}; a[nil] = 10 end))
-assert(not pcall(function () local a = {[nil] = 10} end))
-assert(a[nil] == nil)
-a = nil
-
-a = {10,9,8,7,6,5,4,3,2; [-3]='a', [f]=print, a='a', b='ab'}
-a, a.x, a.y = a, a[-3]
-assert(a[1]==10 and a[-3]==a.a and a[f]==print and a.x=='a' and not a.y)
-a[1], f(a)[2], b, c = {['alo']=assert}, 10, a[1], a[f], 6, 10, 23, f(a), 2
-a[1].alo(a[2]==10 and b==10 and c==print)
-
-a[2^31] = 10; a[2^31+1] = 11; a[-2^31] = 12;
-a[2^32] = 13; a[-2^32] = 14; a[2^32+1] = 15; a[10^33] = 16;
-
-assert(a[2^31] == 10 and a[2^31+1] == 11 and a[-2^31] == 12 and
-       a[2^32] == 13 and a[-2^32] == 14 and a[2^32+1] == 15 and
-       a[10^33] == 16)
-
-a = nil
-
-
--- test conflicts in multiple assignment
-do
-  local a,i,j,b
-  a = {'a', 'b'}; i=1; j=2; b=a
-  i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
-  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
-         b[3] == 1)
-end
-
--- repeat test with upvalues
-do
-  local a,i,j,b
-  a = {'a', 'b'}; i=1; j=2; b=a
-  local function foo ()
-    i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
-  end
-  foo()
-  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
-         b[3] == 1)
-  local t = {}
-  (function (a) t[a], a = 10, 20  end)(1);
-  assert(t[1] == 10)
-end
-
--- bug in 5.2 beta
-local function foo ()
-  local a
-  return function ()
-    local b
-    a, b = 3, 14    -- local and upvalue have same index
-    return a, b
-  end
-end
-
-local a, b = foo()()
-assert(a == 3 and b == 14)
-
-print('OK')
-
-return res
-
diff --git a/lua-5.2.2-tests/big.lua b/lua-5.2.2-tests/big.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/big.lua
+++ /dev/null
@@ -1,79 +0,0 @@
-if _soft then
-  return 'a'
-end
-
-print "testing large tables"
-
-local debug = require"debug" 
-
-local lim = 2^18 + 1000
-local prog = { "local y = {0" }
-for i = 1, lim do prog[#prog + 1] = i  end
-prog[#prog + 1] = "}\n"
-prog[#prog + 1] = "X = y\n"
-prog[#prog + 1] = ("assert(X[%d] == %d)"):format(lim - 1, lim - 2)
-prog[#prog + 1] = "return 0"
-prog = table.concat(prog, ";")
-
-local env = {string = string, assert = assert}
-local f = assert(load(prog, nil, nil, env))
-
-f()
-assert(env.X[lim] == lim - 1 and env.X[lim + 1] == lim)
-for k in pairs(env) do env[k] = nil end
-
--- yields during accesses larger than K (in RK)
-setmetatable(env, {
-  __index = function (t, n) coroutine.yield('g'); return _G[n] end,
-  __newindex = function (t, n, v) coroutine.yield('s'); _G[n] = v end,
-})
-
-X = nil
-co = coroutine.wrap(f)
-assert(co() == 's')
-assert(co() == 'g')
-assert(co() == 'g')
-assert(co() == 0)
-
-assert(X[lim] == lim - 1 and X[lim + 1] == lim)
-
--- errors in accesses larger than K (in RK)
-getmetatable(env).__index = function () end
-getmetatable(env).__newindex = function () end
-local e, m = pcall(f)
-assert(not e and m:find("global 'X'"))
-
--- errors in metamethods 
-getmetatable(env).__newindex = function () error("hi") end
-local e, m = xpcall(f, debug.traceback)
-assert(not e and m:find("'__newindex'"))
-
-f, X = nil
-
-coroutine.yield'b'
-
-if not _no32 then   -- {
-
-print "testing string length overflow"
-
-local repstrings = 192          -- number of strings to be concatenated
-local ssize = math.ceil(2^32 / repstrings) + 1   -- size of each string
-
-assert(repstrings * ssize > 2^32)  -- this should be larger than maximum size_t
-
-local longs = string.rep("\0", ssize)   -- create one long string
-
--- create function to concatentate 'repstrings' copies of its argument
-local rep = assert(load(
-  "local a = ...; return " .. string.rep("a", repstrings, "..")))
-
-local a, b = pcall(rep, longs)   -- call that function
-
--- it should fail without creating string (result would be too large)
-assert(not a and string.find(b, "overflow"))
-
-end   -- }
-
-print'OK'
-
-return 'a'
diff --git a/lua-5.2.2-tests/bitwise.lua b/lua-5.2.2-tests/bitwise.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/bitwise.lua
+++ /dev/null
@@ -1,115 +0,0 @@
-print("testing bitwise operations")
-
-assert(bit32.band() == bit32.bnot(0))
-assert(bit32.btest() == true)
-assert(bit32.bor() == 0)
-assert(bit32.bxor() == 0)
-
-assert(bit32.band() == bit32.band(0xffffffff))
-assert(bit32.band(1,2) == 0)
-
-
--- out-of-range numbers
-assert(bit32.band(-1) == 0xffffffff)
-assert(bit32.band(2^33 - 1) == 0xffffffff)
-assert(bit32.band(-2^33 - 1) == 0xffffffff)
-assert(bit32.band(2^33 + 1) == 1)
-assert(bit32.band(-2^33 + 1) == 1)
-assert(bit32.band(-2^40) == 0)
-assert(bit32.band(2^40) == 0)
-assert(bit32.band(-2^40 - 2) == 0xfffffffe)
-assert(bit32.band(2^40 - 4) == 0xfffffffc)
-
-assert(bit32.lrotate(0, -1) == 0)
-assert(bit32.lrotate(0, 7) == 0)
-assert(bit32.lrotate(0x12345678, 4) == 0x23456781)
-assert(bit32.rrotate(0x12345678, -4) == 0x23456781)
-assert(bit32.lrotate(0x12345678, -8) == 0x78123456)
-assert(bit32.rrotate(0x12345678, 8) == 0x78123456)
-assert(bit32.lrotate(0xaaaaaaaa, 2) == 0xaaaaaaaa)
-assert(bit32.lrotate(0xaaaaaaaa, -2) == 0xaaaaaaaa)
-for i = -50, 50 do
-  assert(bit32.lrotate(0x89abcdef, i) == bit32.lrotate(0x89abcdef, i%32))
-end
-
-assert(bit32.lshift(0x12345678, 4) == 0x23456780)
-assert(bit32.lshift(0x12345678, 8) == 0x34567800)
-assert(bit32.lshift(0x12345678, -4) == 0x01234567)
-assert(bit32.lshift(0x12345678, -8) == 0x00123456)
-assert(bit32.lshift(0x12345678, 32) == 0)
-assert(bit32.lshift(0x12345678, -32) == 0)
-assert(bit32.rshift(0x12345678, 4) == 0x01234567)
-assert(bit32.rshift(0x12345678, 8) == 0x00123456)
-assert(bit32.rshift(0x12345678, 32) == 0)
-assert(bit32.rshift(0x12345678, -32) == 0)
-assert(bit32.arshift(0x12345678, 0) == 0x12345678)
-assert(bit32.arshift(0x12345678, 1) == 0x12345678 / 2)
-assert(bit32.arshift(0x12345678, -1) == 0x12345678 * 2)
-assert(bit32.arshift(-1, 1) == 0xffffffff)
-assert(bit32.arshift(-1, 24) == 0xffffffff)
-assert(bit32.arshift(-1, 32) == 0xffffffff)
-assert(bit32.arshift(-1, -1) == (-1 * 2) % 2^32)
-
-print("+")
--- some special cases
-local c = {0, 1, 2, 3, 10, 0x80000000, 0xaaaaaaaa, 0x55555555,
-           0xffffffff, 0x7fffffff}
-
-for _, b in pairs(c) do
-  assert(bit32.band(b) == b)
-  assert(bit32.band(b, b) == b)
-  assert(bit32.btest(b, b) == (b ~= 0))
-  assert(bit32.band(b, b, b) == b)
-  assert(bit32.btest(b, b, b) == (b ~= 0))
-  assert(bit32.band(b, bit32.bnot(b)) == 0)
-  assert(bit32.bor(b, bit32.bnot(b)) == bit32.bnot(0))
-  assert(bit32.bor(b) == b)
-  assert(bit32.bor(b, b) == b)
-  assert(bit32.bor(b, b, b) == b)
-  assert(bit32.bxor(b) == b)
-  assert(bit32.bxor(b, b) == 0)
-  assert(bit32.bxor(b, 0) == b)
-  assert(bit32.bnot(b) ~= b)
-  assert(bit32.bnot(bit32.bnot(b)) == b)
-  assert(bit32.bnot(b) == 2^32 - 1 - b)
-  assert(bit32.lrotate(b, 32) == b)
-  assert(bit32.rrotate(b, 32) == b)
-  assert(bit32.lshift(bit32.lshift(b, -4), 4) == bit32.band(b, bit32.bnot(0xf)))
-  assert(bit32.rshift(bit32.rshift(b, 4), -4) == bit32.band(b, bit32.bnot(0xf)))
-  for i = -40, 40 do
-    assert(bit32.lshift(b, i) == math.floor((b * 2^i) % 2^32))
-  end
-end
-
-assert(not pcall(bit32.band, {}))
-assert(not pcall(bit32.bnot, "a"))
-assert(not pcall(bit32.lshift, 45))
-assert(not pcall(bit32.lshift, 45, print))
-assert(not pcall(bit32.rshift, 45, print))
-
-print("+")
-
-
--- testing extract/replace
-
-assert(bit32.extract(0x12345678, 0, 4) == 8)
-assert(bit32.extract(0x12345678, 4, 4) == 7)
-assert(bit32.extract(0xa0001111, 28, 4) == 0xa)
-assert(bit32.extract(0xa0001111, 31, 1) == 1)
-assert(bit32.extract(0x50000111, 31, 1) == 0)
-assert(bit32.extract(0xf2345679, 0, 32) == 0xf2345679)
-
-assert(not pcall(bit32.extract, 0, -1))
-assert(not pcall(bit32.extract, 0, 32))
-assert(not pcall(bit32.extract, 0, 0, 33))
-assert(not pcall(bit32.extract, 0, 31, 2))
-
-assert(bit32.replace(0x12345678, 5, 28, 4) == 0x52345678)
-assert(bit32.replace(0x12345678, 0x87654321, 0, 32) == 0x87654321)
-assert(bit32.replace(0, 1, 2) == 2^2)
-assert(bit32.replace(0, -1, 4) == 2^4)
-assert(bit32.replace(-1, 0, 31) == 2^31 - 1)
-assert(bit32.replace(-1, 0, 1, 2) == 2^32 - 7)
-
-
-print'OK'
diff --git a/lua-5.2.2-tests/calls.lua b/lua-5.2.2-tests/calls.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/calls.lua
+++ /dev/null
@@ -1,310 +0,0 @@
-print("testing functions and calls")
-
-local debug = require "debug"
-
--- get the opportunity to test 'type' too ;)
-
-assert(type(1<2) == 'boolean')
-assert(type(true) == 'boolean' and type(false) == 'boolean')
-assert(type(nil) == 'nil' and type(-3) == 'number' and type'x' == 'string' and
-       type{} == 'table' and type(type) == 'function')
-
-assert(type(assert) == type(print))
-f = nil
-function f (x) return a:x (x) end
-assert(type(f) == 'function')
-
-
--- testing local-function recursion
-fact = false
-do
-  local res = 1
-  local function fact (n)
-    if n==0 then return res
-    else return n*fact(n-1)
-    end
-  end
-  assert(fact(5) == 120)
-end
-assert(fact == false)
-
--- testing declarations
-a = {i = 10}
-self = 20
-function a:x (x) return x+self.i end
-function a.y (x) return x+self end
-
-assert(a:x(1)+10 == a.y(1))
-
-a.t = {i=-100}
-a["t"].x = function (self, a,b) return self.i+a+b end
-
-assert(a.t:x(2,3) == -95)
-
-do
-  local a = {x=0}
-  function a:add (x) self.x, a.y = self.x+x, 20; return self end
-  assert(a:add(10):add(20):add(30).x == 60 and a.y == 20)
-end
-
-local a = {b={c={}}}
-
-function a.b.c.f1 (x) return x+1 end
-function a.b.c:f2 (x,y) self[x] = y end
-assert(a.b.c.f1(4) == 5)
-a.b.c:f2('k', 12); assert(a.b.c.k == 12)
-
-print('+')
-
-t = nil   -- 'declare' t
-function f(a,b,c) local d = 'a'; t={a,b,c,d} end
-
-f(      -- this line change must be valid
-  1,2)
-assert(t[1] == 1 and t[2] == 2 and t[3] == nil and t[4] == 'a')
-f(1,2,   -- this one too
-      3,4)
-assert(t[1] == 1 and t[2] == 2 and t[3] == 3 and t[4] == 'a')
-
-function fat(x)
-  if x <= 1 then return 1
-  else return x*load("return fat(" .. x-1 .. ")")()
-  end
-end
-
-assert(load "load 'assert(fat(6)==720)' () ")()
-a = load('return fat(5), 3')
-a,b = a()
-assert(a == 120 and b == 3)
-print('+')
-
-function err_on_n (n)
-  if n==0 then error(); exit(1);
-  else err_on_n (n-1); exit(1);
-  end
-end
-
-do
-  function dummy (n)
-    if n > 0 then
-      assert(not pcall(err_on_n, n))
-      dummy(n-1)
-    end
-  end
-end
-
-dummy(10)
-
-function deep (n)
-  if n>0 then deep(n-1) end
-end
-deep(10)
-deep(200)
-
--- testing tail call
-function deep (n) if n>0 then return deep(n-1) else return 101 end end
-assert(deep(30000) == 101)
-a = {}
-function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
-assert(a:deep(30000) == 101)
-
-print('+')
-
-
-a = nil
-(function (x) a=x end)(23)
-assert(a == 23 and (function (x) return x*2 end)(20) == 40)
-
-
--- testing closures
-
--- fixed-point operator
-Z = function (le)
-      local function a (f)
-        return le(function (x) return f(f)(x) end)
-      end
-      return a(a)
-    end
-
-
--- non-recursive factorial
-
-F = function (f)
-      return function (n)
-               if n == 0 then return 1
-               else return n*f(n-1) end
-             end
-    end
-
-fat = Z(F)
-
-assert(fat(0) == 1 and fat(4) == 24 and Z(F)(5)==5*Z(F)(4))
-
-local function g (z)
-  local function f (a,b,c,d)
-    return function (x,y) return a+b+c+d+a+x+y+z end
-  end
-  return f(z,z+1,z+2,z+3)
-end
-
-f = g(10)
-assert(f(9, 16) == 10+11+12+13+10+9+16+10)
-
-Z, F, f = nil
-print('+')
-
--- testing multiple returns
-
-function unlpack (t, i)
-  i = i or 1
-  if (i <= #t) then
-    return t[i], unlpack(t, i+1)
-  end
-end
-
-function equaltab (t1, t2)
-  assert(#t1 == #t2)
-  for i = 1, #t1 do
-    assert(t1[i] == t2[i])
-  end
-end
-
-local pack = function (...) return (table.pack(...)) end
-
-function f() return 1,2,30,4 end
-function ret2 (a,b) return a,b end
-
-local a,b,c,d = unlpack{1,2,3}
-assert(a==1 and b==2 and c==3 and d==nil)
-a = {1,2,3,4,false,10,'alo',false,assert}
-equaltab(pack(unlpack(a)), a)
-equaltab(pack(unlpack(a), -1), {1,-1})
-a,b,c,d = ret2(f()), ret2(f())
-assert(a==1 and b==1 and c==2 and d==nil)
-a,b,c,d = unlpack(pack(ret2(f()), ret2(f())))
-assert(a==1 and b==1 and c==2 and d==nil)
-a,b,c,d = unlpack(pack(ret2(f()), (ret2(f()))))
-assert(a==1 and b==1 and c==nil and d==nil)
-
-a = ret2{ unlpack{1,2,3}, unlpack{3,2,1}, unlpack{"a", "b"}}
-assert(a[1] == 1 and a[2] == 3 and a[3] == "a" and a[4] == "b")
-
-
--- testing calls with 'incorrect' arguments
-rawget({}, "x", 1)
-rawset({}, "x", 1, 2)
-assert(math.sin(1,2) == math.sin(1))
-table.sort({10,9,8,4,19,23,0,0}, function (a,b) return a<b end, "extra arg")
-
-
--- test for generic load
-local x = "-- a comment\0\0\0\n  x = 10 + \n23; \
-     local a = function () x = 'hi' end; \
-     return '\0'"
-function read1 (x)
-  local i = 0
-  return function ()
-    collectgarbage()
-    i=i+1
-    return string.sub(x, i, i)
-  end
-end
-
-function cannotload (msg, a,b)
-  assert(not a and string.find(b, msg))
-end
-
-a = assert(load(read1(x), "modname", "t", _G))
-assert(a() == "\0" and _G.x == 33)
-assert(debug.getinfo(a).source == "modname")
--- cannot read text in binary mode
-cannotload("attempt to load a text chunk", load(read1(x), "modname", "b", {}))
-cannotload("attempt to load a text chunk", load(x, "modname", "b"))
-
-a = assert(load(function () return nil end))
-a()  -- empty chunk
-
-assert(not load(function () return true end))
-
-
--- small bug
-local t = {nil, "return ", "3"}
-f, msg = load(function () return table.remove(t, 1) end)
-assert(f() == nil)   -- should read the empty chunk
-
--- another small bug (in 5.2.1)
-f = load(string.dump(function () return 1 end), nil, "b", {})
-assert(type(f) == "function" and f() == 1)
-
-
-x = string.dump(load("x = 1; return x"))
-a = assert(load(read1(x), nil, "b"))
-assert(a() == 1 and _G.x == 1)
-cannotload("attempt to load a binary chunk", load(read1(x), nil, "t"))
-cannotload("attempt to load a binary chunk", load(x, nil, "t"))
-
-assert(not pcall(string.dump, print))  -- no dump of C functions
-
-cannotload("unexpected symbol", load(read1("*a = 123")))
-cannotload("unexpected symbol", load("*a = 123"))
-cannotload("hhi", load(function () error("hhi") end))
-
--- any value is valid for _ENV
-assert(load("return _ENV", nil, nil, 123)() == 123)
-
-
--- load when _ENV is not first upvalue
-local x; XX = 123
-local function h ()
-  local y=x   -- use 'x', so that it becomes 1st upvalue
-  return XX   -- global name
-end
-local d = string.dump(h)
-x = load(d, "", "b")
-assert(debug.getupvalue(x, 2) == '_ENV')
-debug.setupvalue(x, 2, _G)
-assert(x() == 123)
-
-assert(assert(load("return XX + ...", nil, nil, {XX = 13}))(4) == 17)
-
-
--- test generic load with nested functions
-x = [[
-  return function (x)
-    return function (y)
-     return function (z)
-       return x+y+z
-     end
-   end
-  end
-]]
-
-a = assert(load(read1(x)))
-assert(a()(2)(3)(10) == 15)
-
-
--- test for dump/undump with upvalues
-local a, b = 20, 30
-x = load(string.dump(function (x)
-  if x == "set" then a = 10+b; b = b+1 else
-  return a
-  end
-end))
-assert(x() == nil)
-assert(debug.setupvalue(x, 1, "hi") == "a")
-assert(x() == "hi")
-assert(debug.setupvalue(x, 2, 13) == "b")
-assert(not debug.setupvalue(x, 3, 10))   -- only 2 upvalues
-x("set")
-assert(x() == 23)
-x("set")
-assert(x() == 24)
-
-
--- test for bug in parameter adjustment
-assert((function () return nil end)(4) == nil)
-assert((function () local a; return a end)(4) == nil)
-assert((function (a) return a end)() == nil)
-
-print('OK')
-return deep
diff --git a/lua-5.2.2-tests/checktable.lua b/lua-5.2.2-tests/checktable.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/checktable.lua
+++ /dev/null
@@ -1,77 +0,0 @@
-
-assert(rawget(_G, "stat") == nil)  -- module not loaded before
-
-if T == nil then
-  stat = function () print"`querytab' not active" end
-  return
-end
-
-
-function checktable (t)
-  local asize, hsize, ff = T.querytab(t)
-  local l = {}
-  for i=0,hsize-1 do
-    local key,val,next = T.querytab(t, i + asize)
-    if key == nil then
-      assert(l[i] == nil and val==nil and next==nil)
-    elseif key == "<undef>" then
-      assert(val==nil)
-    else
-      assert(t[key] == val)
-      local mp = T.hash(key, t)
-      if l[i] then
-        assert(l[i] == mp)
-      elseif mp ~= i then
-        l[i] = mp
-      else  -- list head
-        l[mp] = {mp}   -- first element
-        while next do
-          assert(ff <= next and next < hsize)
-          if l[next] then assert(l[next] == mp) else l[next] = mp end
-          table.insert(l[mp], next)
-          key,val,next = T.querytab(t, next)
-          assert(key)
-        end
-      end
-    end
-  end
-  l.asize = asize; l.hsize = hsize; l.ff = ff
-  return l
-end
-
-function mostra (t)
-  local asize, hsize, ff = T.querytab(t)
-  print(asize, hsize, ff)
-  print'------'
-  for i=0,asize-1 do
-    local _, v = T.querytab(t, i)
-    print(string.format("[%d] -", i), v)
-  end
-  print'------'
-  for i=0,hsize-1 do
-    print(i, T.querytab(t, i+asize))
-  end
-  print'-------------'
-end
-
-function stat (t)
-  t = checktable(t)
-  local nelem, nlist = 0, 0
-  local maxlist = {}
-  for i=0,t.hsize-1 do
-    if type(t[i]) == 'table' then
-      local n = table.getn(t[i])
-      nlist = nlist+1
-      nelem = nelem + n
-      if not maxlist[n] then maxlist[n] = 0 end
-      maxlist[n] = maxlist[n]+1
-    end
-  end
-  print(string.format("hsize=%d  elements=%d  load=%.2f  med.len=%.2f (asize=%d)",
-          t.hsize, nelem, nelem/t.hsize, nelem/nlist, t.asize))
-  for i=1,table.getn(maxlist) do
-    local n = maxlist[i] or 0
-    print(string.format("%5d %10d %.2f%%", i, n, n*100/nlist))
-  end
-end
-
diff --git a/lua-5.2.2-tests/closure.lua b/lua-5.2.2-tests/closure.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/closure.lua
+++ /dev/null
@@ -1,244 +0,0 @@
-print "testing closures"
-
-local A,B = 0,{g=10}
-function f(x)
-  local a = {}
-  for i=1,1000 do
-    local y = 0
-    do
-      a[i] = function () B.g = B.g+1; y = y+x; return y+A end
-    end
-  end
-  local dummy = function () return a[A] end
-  collectgarbage()
-  A = 1; assert(dummy() == a[1]); A = 0;
-  assert(a[1]() == x)
-  assert(a[3]() == x)
-  collectgarbage()
-  assert(B.g == 12)
-  return a
-end
-
-local a = f(10)
--- force a GC in this level
-local x = {[1] = {}}   -- to detect a GC
-setmetatable(x, {__mode = 'kv'})
-while x[1] do   -- repeat until GC
-  local a = A..A..A..A  -- create garbage
-  A = A+1
-end
-assert(a[1]() == 20+A)
-assert(a[1]() == 30+A)
-assert(a[2]() == 10+A)
-collectgarbage()
-assert(a[2]() == 20+A)
-assert(a[2]() == 30+A)
-assert(a[3]() == 20+A)
-assert(a[8]() == 10+A)
-assert(getmetatable(x).__mode == 'kv')
-assert(B.g == 19)
-
-
--- testing equality
-a = {}
-for i = 1, 5 do  a[i] = function (x) return x + a + _ENV end  end
-assert(a[3] == a[4] and a[4] == a[5])
-
-for i = 1, 5 do  a[i] = function (x) return i + a + _ENV end  end
-assert(a[3] ~= a[4] and a[4] ~= a[5])
-
-local function f()
-  return function (x)  return math.sin(_ENV[x])  end
-end
-assert(f() == f())
-
-
--- testing closures with 'for' control variable
-a = {}
-for i=1,10 do
-  a[i] = {set = function(x) i=x end, get = function () return i end}
-  if i == 3 then break end
-end
-assert(a[4] == nil)
-a[1].set(10)
-assert(a[2].get() == 2)
-a[2].set('a')
-assert(a[3].get() == 3)
-assert(a[2].get() == 'a')
-
-a = {}
-local t = {"a", "b"}
-for i = 1, #t do
-  local k = t[i]
-  a[i] = {set = function(x, y) i=x; k=y end,
-          get = function () return i, k end}
-  if i == 2 then break end
-end
-a[1].set(10, 20)
-local r,s = a[2].get()
-assert(r == 2 and s == 'b')
-r,s = a[1].get()
-assert(r == 10 and s == 20)
-a[2].set('a', 'b')
-r,s = a[2].get()
-assert(r == "a" and s == "b")
-
-
--- testing closures with 'for' control variable x break
-for i=1,3 do
-  f = function () return i end
-  break
-end
-assert(f() == 1)
-
-for k = 1, #t do
-  local v = t[k]
-  f = function () return k, v end
-  break
-end
-assert(({f()})[1] == 1)
-assert(({f()})[2] == "a")
-
-
--- testing closure x break x return x errors
-
-local b
-function f(x)
-  local first = 1
-  while 1 do
-    if x == 3 and not first then return end
-    local a = 'xuxu'
-    b = function (op, y)
-          if op == 'set' then
-            a = x+y
-          else
-            return a
-          end
-        end
-    if x == 1 then do break end
-    elseif x == 2 then return
-    else if x ~= 3 then error() end
-    end
-    first = nil
-  end
-end
-
-for i=1,3 do
-  f(i)
-  assert(b('get') == 'xuxu')
-  b('set', 10); assert(b('get') == 10+i)
-  b = nil
-end
-
-pcall(f, 4);
-assert(b('get') == 'xuxu')
-b('set', 10); assert(b('get') == 14)
-
-
-local w
--- testing multi-level closure
-function f(x)
-  return function (y)
-    return function (z) return w+x+y+z end
-  end
-end
-
-y = f(10)
-w = 1.345
-assert(y(20)(30) == 60+w)
-
--- testing closures x repeat-until
-
-local a = {}
-local i = 1
-repeat
-  local x = i
-  a[i] = function () i = x+1; return x end
-until i > 10 or a[i]() ~= x
-assert(i == 11 and a[1]() == 1 and a[3]() == 3 and i == 4)
-
-
--- testing closures created in 'then' and 'else' parts of 'if's
-a = {}
-for i = 1, 10 do
-  if i % 3 == 0 then
-    local y = 0
-    a[i] = function (x) local t = y; y = x; return t end
-  elseif i % 3 == 1 then
-    goto L1
-    error'not here'
-  ::L1::
-    local y = 1
-    a[i] = function (x) local t = y; y = x; return t end
-  elseif i % 3 == 2 then
-    local t
-    goto l4
-    ::l4a:: a[i] = t; goto l4b
-    error("should never be here!")
-    ::l4::
-    local y = 2
-    t = function (x) local t = y; y = x; return t end
-    goto l4a
-    error("should never be here!")
-    ::l4b::
-  end
-end
-
-for i = 1, 10 do
-  assert(a[i](i * 10) == i % 3 and a[i]() == i * 10)
-end
-
-print'+'
-
-
--- test for correctly closing upvalues in tail calls of vararg functions
-local function t ()
-  local function c(a,b) assert(a=="test" and b=="OK") end
-  local function v(f, ...) c("test", f() ~= 1 and "FAILED" or "OK") end
-  local x = 1
-  return v(function() return x end)
-end
-t()
-
-
--- test for debug manipulation of upvalues
-local debug = require'debug'
-
-do
-  local a , b, c = 3, 5, 7
-  foo1 = function () return a+b end;
-  foo2 = function () return b+a end;
-  do
-    local a = 10
-    foo3 = function () return a+b end;
-  end
-end
-
-assert(debug.upvalueid(foo1, 1))
-assert(debug.upvalueid(foo1, 2))
-assert(not pcall(debug.upvalueid, foo1, 3))
-assert(debug.upvalueid(foo1, 1) == debug.upvalueid(foo2, 2))
-assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo2, 1))
-assert(debug.upvalueid(foo3, 1))
-assert(debug.upvalueid(foo1, 1) ~= debug.upvalueid(foo3, 1))
-assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo3, 2))
-
-assert(debug.upvalueid(string.gmatch("x", "x"), 1) ~= nil)
-
-assert(foo1() == 3 + 5 and foo2() == 5 + 3)
-debug.upvaluejoin(foo1, 2, foo2, 2)
-assert(foo1() == 3 + 3 and foo2() == 5 + 3)
-assert(foo3() == 10 + 5)
-debug.upvaluejoin(foo3, 2, foo2, 1)
-assert(foo3() == 10 + 5)
-debug.upvaluejoin(foo3, 2, foo2, 2)
-assert(foo3() == 10 + 3)
-
-assert(not pcall(debug.upvaluejoin, foo1, 3, foo2, 1))
-assert(not pcall(debug.upvaluejoin, foo1, 1, foo2, 3))
-assert(not pcall(debug.upvaluejoin, foo1, 0, foo2, 1))
-assert(not pcall(debug.upvaluejoin, print, 1, foo2, 1))
-assert(not pcall(debug.upvaluejoin, {}, 1, foo2, 1))
-assert(not pcall(debug.upvaluejoin, foo1, 1, print, 1))
-
-print'OK'
diff --git a/lua-5.2.2-tests/code.lua b/lua-5.2.2-tests/code.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/code.lua
+++ /dev/null
@@ -1,182 +0,0 @@
-if T==nil then
-  (Message or print)('\a\n >>> testC not active: skipping opcode tests <<<\n\a')
-  return
-end
-print "testing code generation and optimizations"
-
-
--- this code gave an error for the code checker
-do
-  local function f (a)
-  for k,v,w in a do end
-  end
-end
-
-
-function check (f, ...)
-  local arg = {...}
-  local c = T.listcode(f)
-  for i=1, #arg do
-    -- print(arg[i], c[i])
-    assert(string.find(c[i], '- '..arg[i]..' *%d'))
-  end
-  assert(c[#arg+2] == nil)
-end
-
-
-function checkequal (a, b)
-  a = T.listcode(a)
-  b = T.listcode(b)
-  for i = 1, #a do
-    a[i] = string.gsub(a[i], '%b()', '')   -- remove line number
-    b[i] = string.gsub(b[i], '%b()', '')   -- remove line number
-    assert(a[i] == b[i])
-  end
-end
-
-
--- some basic instructions
-check(function ()
-  (function () end){f()}
-end, 'CLOSURE', 'NEWTABLE', 'GETTABUP', 'CALL', 'SETLIST', 'CALL', 'RETURN')
-
-
--- sequence of LOADNILs
-check(function ()
-  local a,b,c
-  local d; local e;
-  local f,g,h;
-  d = nil; d=nil; b=nil; a=nil; c=nil;
-end, 'LOADNIL', 'RETURN')
-
-check(function ()
-  local a,b,c,d = 1,1,1,1
-  d=nil;c=nil;b=nil;a=nil
-end, 'LOADK', 'LOADK', 'LOADK', 'LOADK', 'LOADNIL', 'RETURN')
-
-do
-  local a,b,c,d = 1,1,1,1
-  d=nil;c=nil;b=nil;a=nil
-  assert(a == nil and b == nil and c == nil and d == nil)
-end
-
-
--- single return
-check (function (a,b,c) return a end, 'RETURN')
-
-
--- infinite loops
-check(function () while true do local a = -1 end end,
-'LOADK', 'JMP', 'RETURN')
-
-check(function () while 1 do local a = -1 end end,
-'LOADK', 'JMP', 'RETURN')
-
-check(function () repeat local x = 1 until true end,
-'LOADK', 'RETURN')
-
-
--- concat optimization
-check(function (a,b,c,d) return a..b..c..d end,
-  'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN')
-
--- not
-check(function () return not not nil end, 'LOADBOOL', 'RETURN')
-check(function () return not not false end, 'LOADBOOL', 'RETURN')
-check(function () return not not true end, 'LOADBOOL', 'RETURN')
-check(function () return not not 1 end, 'LOADBOOL', 'RETURN')
-
--- direct access to locals
-check(function ()
-  local a,b,c,d
-  a = b*2
-  c[4], a[b] = -((a + d/-20.5 - a[b]) ^ a.x), b
-end,
-  'LOADNIL',
-  'MUL',
-  'DIV', 'ADD', 'GETTABLE', 'SUB', 'GETTABLE', 'POW',
-    'UNM', 'SETTABLE', 'SETTABLE', 'RETURN')
-
-
--- direct access to constants
-check(function ()
-  local a,b
-  a.x = 0
-  a.x = b
-  a[b] = 'y'
-  a = 1 - a
-  b = 1/a
-  b = 5+4
-  a[true] = false
-end,
-  'LOADNIL',
-  'SETTABLE', 'SETTABLE', 'SETTABLE', 'SUB', 'DIV', 'LOADK',
-  'SETTABLE', 'RETURN')
-
--- constant folding
-local function f () return -((2^8 + -(-1)) % 8)/2 * 4 - 3 end
-
-check(f, 'LOADK', 'RETURN')
-assert(f() == -5)
-
-
--- bug in constant folding for 5.1
-check(function () return -nil end,
-  'LOADNIL', 'UNM', 'RETURN')
-
-
-check(function ()
-  local a,b,c
-  b[c], a = c, b
-  b[a], a = c, b
-  a, b = c, a
-  a = a
-end, 
-  'LOADNIL',
-  'MOVE', 'MOVE', 'SETTABLE',
-  'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
-  'MOVE', 'MOVE', 'MOVE',
-  -- no code for a = a
-  'RETURN')
-
-
--- x == nil , x ~= nil
-checkequal(function () if (a==nil) then a=1 end; if a~=nil then a=1 end end,
-           function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
-
-check(function () if a==nil then a=1 end end,
-'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
-
--- de morgan
-checkequal(function () local a; if not (a or b) then b=a end end,
-           function () local a; if (not a and not b) then b=a end end)
-
-checkequal(function (l) local a; return 0 <= a and a <= l end,
-           function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
-
-
--- if-goto optimizations
-check(function (a)
-        if a == 1 then goto l1
-        elseif a == 2 then goto l2
-        elseif a == 3 then goto l2
-        else if a == 4 then goto l3
-             else goto l3
-             end
-        end
-        ::l1:: ::l2:: ::l3:: ::l4:: 
-end, 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'JMP', 'RETURN')
-
-checkequal(
-function (a) while a < 10 do a = a + 1 end end,
-function (a) ::L2:: if not(a < 10) then goto L1 end; a = a + 1;
-                goto L2; ::L1:: end
-)
-
-checkequal(
-function (a) while a < 10 do a = a + 1 end end,
-function (a) while true do if not(a < 10) then break end; a = a + 1; end end
-)
-
-print 'OK'
-
diff --git a/lua-5.2.2-tests/constructs.lua b/lua-5.2.2-tests/constructs.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/constructs.lua
+++ /dev/null
@@ -1,310 +0,0 @@
-;;print "testing syntax";;
-
-local debug = require "debug"
-
--- testing semicollons
-do ;;; end
-; do ; a = 3; assert(a == 3) end;
-;
-
-
--- testing priorities
-
-assert(2^3^2 == 2^(3^2));
-assert(2^3*4 == (2^3)*4);
-assert(2^-2 == 1/4 and -2^- -2 == - - -4);
-assert(not nil and 2 and not(2>3 or 3<2));
-assert(-3-1-5 == 0+0-9);
-assert(-2^2 == -4 and (-2)^2 == 4 and 2*2-3-1 == 0);
-assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
-assert(not(2+1 > 3*1) and "a".."b" > "a");
-
-assert(not ((true or false) and nil))
-assert(      true or false  and nil)
-
--- old bug
-assert((((1 or false) and true) or false) == true)
-assert((((nil and true) or false) and true) == false)
-
-local a,b = 1,nil;
-assert(-(1 or 2) == -1 and (1 and 2)+(-1.25 or -4) == 0.75);
-x = ((b or a)+1 == 2 and (10 or a)+1 == 11); assert(x);
-x = (((2<3) or 1) == true and (2<3 and 4) == 4); assert(x);
-
-x,y=1,2;
-assert((x>y) and x or y == 2);
-x,y=2,1;
-assert((x>y) and x or y == 2);
-
-assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
-
-
--- silly loops
-repeat until 1; repeat until true;
-while false do end; while nil do end;
-
-do  -- test old bug (first name could not be an `upvalue')
- local a; function f(x) x={a=1}; x={x=1}; x={G=1} end
-end
-
-function f (i)
-  if type(i) ~= 'number' then return i,'jojo'; end;
-  if i > 0 then return i, f(i-1); end;
-end
-
-x = {f(3), f(5), f(10);};
-assert(x[1] == 3 and x[2] == 5 and x[3] == 10 and x[4] == 9 and x[12] == 1);
-assert(x[nil] == nil)
-x = {f'alo', f'xixi', nil};
-assert(x[1] == 'alo' and x[2] == 'xixi' and x[3] == nil);
-x = {f'alo'..'xixi'};
-assert(x[1] == 'aloxixi')
-x = {f{}}
-assert(x[2] == 'jojo' and type(x[1]) == 'table')
-
-
-local f = function (i)
-  if i < 10 then return 'a';
-  elseif i < 20 then return 'b';
-  elseif i < 30 then return 'c';
-  end;
-end
-
-assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == nil)
-
-for i=1,1000 do break; end;
-n=100;
-i=3;
-t = {};
-a=nil
-while not a do
-  a=0; for i=1,n do for i=i,1,-1 do a=a+1; t[i]=1; end; end;
-end
-assert(a == n*(n+1)/2 and i==3);
-assert(t[1] and t[n] and not t[0] and not t[n+1])
-
-function f(b)
-  local x = 1;
-  repeat
-    local a;
-    if b==1 then local b=1; x=10; break
-    elseif b==2 then x=20; break;
-    elseif b==3 then x=30;
-    else local a,b,c,d=math.sin(1); x=x+1;
-    end
-  until x>=12;
-  return x;
-end;
-
-assert(f(1) == 10 and f(2) == 20 and f(3) == 30 and f(4)==12)
-
-
-local f = function (i)
-  if i < 10 then return 'a'
-  elseif i < 20 then return 'b'
-  elseif i < 30 then return 'c'
-  else return 8
-  end
-end
-
-assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == 8)
-
-local a, b = nil, 23
-x = {f(100)*2+3 or a, a or b+2}
-assert(x[1] == 19 and x[2] == 25)
-x = {f=2+3 or a, a = b+2}
-assert(x.f == 5 and x.a == 25)
-
-a={y=1}
-x = {a.y}
-assert(x[1] == 1)
-
-function f(i)
-  while 1 do
-    if i>0 then i=i-1;
-    else return; end;
-  end;
-end;
-
-function g(i)
-  while 1 do
-    if i>0 then i=i-1
-    else return end
-  end
-end
-
-f(10); g(10);
-
-do
-  function f () return 1,2,3; end
-  local a, b, c = f();
-  assert(a==1 and b==2 and c==3)
-  a, b, c = (f());
-  assert(a==1 and b==nil and c==nil)
-end
-
-local a,b = 3 and f();
-assert(a==1 and b==nil)
-
-function g() f(); return; end;
-assert(g() == nil)
-function g() return nil or f() end
-a,b = g()
-assert(a==1 and b==nil)
-
-print'+';
-
-
-f = [[
-return function ( a , b , c , d , e )
-  local x = a >= b or c or ( d and e ) or nil
-  return x
-end , { a = 1 , b = 2 >= 1 , } or { 1 };
-]]
-f = string.gsub(f, "%s+", "\n");   -- force a SETLINE between opcodes
-f,a = load(f)();
-assert(a.a == 1 and a.b)
-
-function g (a,b,c,d,e)
-  if not (a>=b or c or d and e or nil) then return 0; else return 1; end;
-end
-
-function h (a,b,c,d,e)
-  while (a>=b or c or (d and e) or nil) do return 1; end;
-  return 0;
-end;
-
-assert(f(2,1) == true and g(2,1) == 1 and h(2,1) == 1)
-assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
-assert(f(1,2,'a')
-~=          -- force SETLINE before nil
-nil, "")
-assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
-assert(f(1,2,nil,1,'x') == 'x' and g(1,2,nil,1,'x') == 1 and
-                                   h(1,2,nil,1,'x') == 1)
-assert(f(1,2,nil,nil,'x') == nil and g(1,2,nil,nil,'x') == 0 and
-                                     h(1,2,nil,nil,'x') == 0)
-assert(f(1,2,nil,1,nil) == nil and g(1,2,nil,1,nil) == 0 and
-                                   h(1,2,nil,1,nil) == 0)
-
-assert(1 and 2<3 == true and 2<3 and 'a'<'b' == true)
-x = 2<3 and not 3; assert(x==false)
-x = 2<1 or (2>1 and 'a'); assert(x=='a')
-
-
-do
-  local a; if nil then a=1; else a=2; end;    -- this nil comes as PUSHNIL 2
-  assert(a==2)
-end
-
-function F(a)
-  assert(debug.getinfo(1, "n").name == 'F')
-  return a,2,3
-end
-
-a,b = F(1)~=nil; assert(a == true and b == nil);
-a,b = F(nil)==nil; assert(a == true and b == nil)
-
-----------------------------------------------------------------
--- creates all combinations of 
--- [not] ([not] arg op [not] (arg op [not] arg ))
--- and tests each one
-
-function ID(x) return x end
-
-function f(t, i)
-  local b = t.n
-  local res = math.fmod(math.floor(i/c), b)+1
-  c = c*b
-  return t[res]
-end
-
-local arg = {" ( 1 < 2 ) ", " ( 1 >= 2 ) ", " F ( ) ", "  nil "; n=4}
-
-local op = {" and ", " or ", " == ", " ~= "; n=4}
-
-local neg = {" ", " not "; n=2}
-
-local i = 0
-repeat
-  c = 1
-  local s = f(neg, i)..'ID('..f(neg, i)..f(arg, i)..f(op, i)..
-            f(neg, i)..'ID('..f(arg, i)..f(op, i)..f(neg, i)..f(arg, i)..'))'
-  local s1 = string.gsub(s, 'ID', '')
-  K,X,NX,WX1,WX2 = nil
-  s = string.format([[
-      local a = %s
-      local b = not %s
-      K = b
-      local xxx; 
-      if %s then X = a  else X = b end
-      if %s then NX = b  else NX = a end
-      while %s do WX1 = a; break end
-      while %s do WX2 = a; break end
-      repeat if (%s) then break end; assert(b)  until not(%s)
-  ]], s1, s, s1, s, s1, s, s1, s, s)
-  assert(load(s))()
-  assert(X and not NX and not WX1 == K and not WX2 == K)
-  if math.fmod(i,4000) == 0 then print('+') end
-  i = i+1
-until i==c
-
-print '+'
-
-------------------------------------------------------------------
-print 'testing short-circuit optimizations'
-
-_ENV.GLOB1 = 1
-_ENV.GLOB2 = 2
-
-local basiccases = {
-  {"nil", nil},
-  {"false", false},
-  {"true", true},
-  {"10", 10},
-  {"(_ENV.GLOB1 < _ENV.GLOB2)", true},
-  {"(_ENV.GLOB2 < _ENV.GLOB1)", false},
-}
-
-
-local binops = {
-  {" and ", function (a,b) if not a then return a else return b end end},
-  {" or ", function (a,b) if a then return a else return b end end},
-}
-
-local mem = {basiccases}    -- for memoization
-
-local function allcases (n)
-  if mem[n] then return mem[n] end
-  local res = {}
-  -- include all smaller cases
-  for _, v in ipairs(allcases(n - 1)) do
-    res[#res + 1] = v
-  end
-  for i = 1, n - 1 do
-    for _, v1 in ipairs(allcases(i)) do
-      for _, v2 in ipairs(allcases(n - i)) do
-        for _, op in ipairs(binops) do
-            res[#res + 1] = {
-              "(" .. v1[1] .. op[1] .. v2[1] .. ")",
-              op[2](v1[2], v2[2])
-            }
-        end
-      end
-    end
-    print('+')
-  end
-  mem[n] = res   -- memoize
-  return res
-end
-
--- do not do too many combinations for soft tests
-local level = _soft and 3 or 4
-
-for _, v in pairs(allcases(level)) do
-  local res = load("return " .. v[1])()
-  assert(res == v[2])
-end
-------------------------------------------------------------------
-
-print'OK'
diff --git a/lua-5.2.2-tests/coroutine.lua b/lua-5.2.2-tests/coroutine.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/coroutine.lua
+++ /dev/null
@@ -1,728 +0,0 @@
-print "testing coroutines"
-
-local debug = require'debug'
-
-local f
-
-local main, ismain = coroutine.running()
-assert(type(main) == "thread" and ismain)
-assert(not coroutine.resume(main))
-assert(not pcall(coroutine.yield))
-
-
-
--- tests for multiple yield/resume arguments
-
-local function eqtab (t1, t2)
-  assert(#t1 == #t2)
-  for i = 1, #t1 do
-    local v = t1[i]
-    assert(t2[i] == v)
-  end
-end
-
-_G.x = nil   -- declare x
-function foo (a, ...)
-  local x, y = coroutine.running()
-  assert(x == f and y == false)
-  assert(coroutine.status(f) == "running")
-  local arg = {...}
-  for i=1,#arg do
-    _G.x = {coroutine.yield(table.unpack(arg[i]))}
-  end
-  return table.unpack(a)
-end
-
-f = coroutine.create(foo)
-assert(type(f) == "thread" and coroutine.status(f) == "suspended")
-assert(string.find(tostring(f), "thread"))
-local s,a,b,c,d
-s,a,b,c,d = coroutine.resume(f, {1,2,3}, {}, {1}, {'a', 'b', 'c'})
-assert(s and a == nil and coroutine.status(f) == "suspended")
-s,a,b,c,d = coroutine.resume(f)
-eqtab(_G.x, {})
-assert(s and a == 1 and b == nil)
-s,a,b,c,d = coroutine.resume(f, 1, 2, 3)
-eqtab(_G.x, {1, 2, 3})
-assert(s and a == 'a' and b == 'b' and c == 'c' and d == nil)
-s,a,b,c,d = coroutine.resume(f, "xuxu")
-eqtab(_G.x, {"xuxu"})
-assert(s and a == 1 and b == 2 and c == 3 and d == nil)
-assert(coroutine.status(f) == "dead")
-s, a = coroutine.resume(f, "xuxu")
-assert(not s and string.find(a, "dead") and coroutine.status(f) == "dead")
-
-
--- yields in tail calls
-local function foo (i) return coroutine.yield(i) end
-f = coroutine.wrap(function ()
-  for i=1,10 do
-    assert(foo(i) == _G.x)
-  end
-  return 'a'
-end)
-for i=1,10 do _G.x = i; assert(f(i) == i) end
-_G.x = 'xuxu'; assert(f('xuxu') == 'a')
-
--- recursive
-function pf (n, i)
-  coroutine.yield(n)
-  pf(n*i, i+1)
-end
-
-f = coroutine.wrap(pf)
-local s=1
-for i=1,10 do
-  assert(f(1, 1) == s)
-  s = s*i
-end
-
--- sieve
-function gen (n)
-  return coroutine.wrap(function ()
-    for i=2,n do coroutine.yield(i) end
-  end)
-end
-
-
-function filter (p, g)
-  return coroutine.wrap(function ()
-    while 1 do
-      local n = g()
-      if n == nil then return end
-      if math.fmod(n, p) ~= 0 then coroutine.yield(n) end
-    end
-  end)
-end
-
-local x = gen(100)
-local a = {}
-while 1 do
-  local n = x()
-  if n == nil then break end
-  table.insert(a, n)
-  x = filter(n, x)
-end
-
-assert(#a == 25 and a[#a] == 97)
-
-
--- yielding across C boundaries
-
-co = coroutine.wrap(function()
-       assert(not pcall(table.sort,{1,2,3}, coroutine.yield))
-       coroutine.yield(20)
-       return 30
-     end)
-
-assert(co() == 20)
-assert(co() == 30)
-
-
-local f = function (s, i) return coroutine.yield(i) end
-
-local f1 = coroutine.wrap(function ()
-             return xpcall(pcall, function (...) return ... end,
-               function ()
-                 local s = 0
-                 for i in f, nil, 1 do pcall(function () s = s + i end) end
-                 error({s})
-               end)
-           end)
-
-f1()
-for i = 1, 10 do assert(f1(i) == i) end
-local r1, r2, v = f1(nil)
-assert(r1 and not r2 and v[1] ==  (10 + 1)*10/2)
-
-
-function f (a, b) a = coroutine.yield(a);  error{a + b} end
-function g(x) return x[1]*2 end
-
-co = coroutine.wrap(function ()
-       coroutine.yield(xpcall(f, g, 10, 20))
-     end)
-
-assert(co() == 10)
-r, msg = co(100)
-assert(not r and msg == 240)
-
-
--- errors in coroutines
-function foo ()
-  assert(debug.getinfo(1).currentline == debug.getinfo(foo).linedefined + 1)
-  assert(debug.getinfo(2).currentline == debug.getinfo(goo).linedefined)
-  coroutine.yield(3)
-  error(foo)
-end
-
-function goo() foo() end
-x = coroutine.wrap(goo)
-assert(x() == 3)
-local a,b = pcall(x)
-assert(not a and b == foo)
-
-x = coroutine.create(goo)
-a,b = coroutine.resume(x)
-assert(a and b == 3)
-a,b = coroutine.resume(x)
-assert(not a and b == foo and coroutine.status(x) == "dead")
-a,b = coroutine.resume(x)
-assert(not a and string.find(b, "dead") and coroutine.status(x) == "dead")
-
-
--- co-routines x for loop
-function all (a, n, k)
-  if k == 0 then coroutine.yield(a)
-  else
-    for i=1,n do
-      a[k] = i
-      all(a, n, k-1)
-    end
-  end
-end
-
-local a = 0
-for t in coroutine.wrap(function () all({}, 5, 4) end) do
-  a = a+1
-end
-assert(a == 5^4)
-
-
--- access to locals of collected corroutines
-local C = {}; setmetatable(C, {__mode = "kv"})
-local x = coroutine.wrap (function ()
-            local a = 10
-            local function f () a = a+10; return a end
-            while true do
-              a = a+1
-              coroutine.yield(f)
-            end
-          end)
-
-C[1] = x;
-
-local f = x()
-assert(f() == 21 and x()() == 32 and x() == f)
-x = nil
-collectgarbage()
-assert(C[1] == nil)
-assert(f() == 43 and f() == 53)
-
-
--- old bug: attempt to resume itself
-
-function co_func (current_co)
-  assert(coroutine.running() == current_co)
-  assert(coroutine.resume(current_co) == false)
-  assert(coroutine.resume(current_co) == false)
-  return 10
-end
-
-local co = coroutine.create(co_func)
-local a,b = coroutine.resume(co, co)
-assert(a == true and b == 10)
-assert(coroutine.resume(co, co) == false)
-assert(coroutine.resume(co, co) == false)
-
-
--- attempt to resume 'normal' coroutine
-co1 = coroutine.create(function () return co2() end)
-co2 = coroutine.wrap(function ()
-        assert(coroutine.status(co1) == 'normal')
-        assert(not coroutine.resume(co1))
-        coroutine.yield(3)
-      end)
-
-a,b = coroutine.resume(co1)
-assert(a and b == 3)
-assert(coroutine.status(co1) == 'dead')
-
--- infinite recursion of coroutines
-a = function(a) coroutine.wrap(a)(a) end
-assert(not pcall(a, a))
-
-
--- access to locals of erroneous coroutines
-local x = coroutine.create (function ()
-            local a = 10
-            _G.f = function () a=a+1; return a end
-            error('x')
-          end)
-
-assert(not coroutine.resume(x))
--- overwrite previous position of local `a'
-assert(not coroutine.resume(x, 1, 1, 1, 1, 1, 1, 1))
-assert(_G.f() == 11)
-assert(_G.f() == 12)
-
-
-if not T then
-  (Message or print)('\a\n >>> testC not active: skipping yield/hook tests <<<\n\a')
-else
-  print "testing yields inside hooks"
-
-  local turn
-  
-  function fact (t, x)
-    assert(turn == t)
-    if x == 0 then return 1
-    else return x*fact(t, x-1)
-    end
-  end
-
-  local A,B,a,b = 0,0,0,0
-
-  local x = coroutine.create(function ()
-    T.sethook("yield 0", "", 2)
-    A = fact("A", 10)
-  end)
-
-  local y = coroutine.create(function ()
-    T.sethook("yield 0", "", 3)
-    B = fact("B", 11)
-  end)
-
-  while A==0 or B==0 do
-    if A==0 then turn = "A"; assert(T.resume(x)) end
-    if B==0 then turn = "B"; assert(T.resume(y)) end
-  end
-
-  assert(B/A == 11)
-
-  local line = debug.getinfo(1, "l").currentline + 2    -- get line number
-  local function foo ()
-    local x = 10    --<< this line is 'line'
-    x = x + 10
-    _G.XX = x
-  end
-
-  -- testing yields in line hook
-  local co = coroutine.wrap(function ()
-    T.sethook("setglobal X; yield 0", "l", 0); foo(); return 10 end)
-
-  _G.XX = nil;
-  _G.X = nil; co(); assert(_G.X == line)
-  _G.X = nil; co(); assert(_G.X == line + 1)
-  _G.X = nil; co(); assert(_G.X == line + 2 and _G.XX == nil)
-  _G.X = nil; co(); assert(_G.X == line + 3 and _G.XX == 20)
-  assert(co() == 10)
-
-  -- testing yields in count hook
-  co = coroutine.wrap(function ()
-    T.sethook("yield 0", "", 1); foo(); return 10 end)
-
-  _G.XX = nil;
-  local c = 0
-  repeat c = c + 1; local a = co() until a == 10
-  assert(_G.XX == 20 and c == 10)
-
-  co = coroutine.wrap(function ()
-    T.sethook("yield 0", "", 2); foo(); return 10 end)
-
-  _G.XX = nil;
-  local c = 0
-  repeat c = c + 1; local a = co() until a == 10
-  assert(_G.XX == 20 and c == 5)
-  _G.X = nil; _G.XX = nil
-
-
-  print "testing coroutine API"
-  
-  -- reusing a thread
-  assert(T.testC([[
-    newthread      # create thread
-    pushvalue 2    # push body
-    pushstring 'a a a'  # push argument
-    xmove 0 3 2   # move values to new thread
-    resume -1, 1    # call it first time
-    pushstatus
-    xmove 3 0 0   # move results back to stack
-    setglobal X    # result
-    setglobal Y    # status
-    pushvalue 2     # push body (to call it again)
-    pushstring 'b b b'
-    xmove 0 3 2
-    resume -1, 1    # call it again
-    pushstatus
-    xmove 3 0 0
-    return 1        # return result
-  ]], function (...) return ... end) == 'b b b')
-
-  assert(X == 'a a a' and Y == 'OK')
-
-
-  -- resuming running coroutine
-  C = coroutine.create(function ()
-        return T.testC([[
-                 pushnum 10;
-                 pushnum 20;
-                 resume -3 2;
-                 pushstatus
-                 gettop;
-                 return 3]], C)
-      end)
-  local a, b, c, d = coroutine.resume(C)
-  assert(a == true and string.find(b, "non%-suspended") and
-         c == "ERRRUN" and d == 4)
-
-  a, b, c, d = T.testC([[
-    rawgeti R 1    # get main thread
-    pushnum 10;
-    pushnum 20;
-    resume -3 2;
-    pushstatus
-    gettop;
-    return 4]])
-  assert(a == coroutine.running() and string.find(b, "non%-suspended") and
-         c == "ERRRUN" and d == 4)
-
-
-  -- using a main thread as a coroutine
-  local state = T.newstate()
-  T.loadlib(state)
-
-  assert(T.doremote(state, [[
-    coroutine = require'coroutine';
-    X = function (x) coroutine.yield(x, 'BB'); return 'CC' end;
-    return 'ok']]))
-
-  t = table.pack(T.testC(state, [[
-    rawgeti R 1     # get main thread
-    pushstring 'XX'
-    getglobal X    # get function for body
-    pushstring AA      # arg
-    resume 1 1      # 'resume' shadows previous stack!
-    gettop
-    setglobal T    # top
-    setglobal B    # second yielded value
-    setglobal A    # fist yielded value
-    rawgeti R 1     # get main thread
-    pushnum 5       # arg (noise)
-    resume 1 1      # after coroutine ends, previous stack is back
-    pushstatus
-    gettop
-    return .
-  ]]))
-  assert(t.n == 4 and t[2] == 'XX' and t[3] == 'CC' and t[4] == 'OK')
-  assert(T.doremote(state, "return T") == '2')
-  assert(T.doremote(state, "return A") == 'AA')
-  assert(T.doremote(state, "return B") == 'BB')
-
-  T.closestate(state)
-
-  print'+'
-
-end
-
-
--- leaving a pending coroutine open
-_X = coroutine.wrap(function ()
-      local a = 10
-      local x = function () a = a+1 end
-      coroutine.yield()
-    end)
-
-_X()
-
-
-if not _soft then
-  -- bug (stack overflow)
-  local j = 2^9
-  local lim = 1000000    -- (C stack limit; assume 32-bit machine)
-  local t = {lim - 10, lim - 5, lim - 1, lim, lim + 1}
-  for i = 1, #t do
-    local j = t[i]
-    co = coroutine.create(function()
-           local t = {}
-           for i = 1, j do t[i] = i end
-           return table.unpack(t)
-         end)
-    local r, msg = coroutine.resume(co)
-    assert(not r)
-  end
-end
-
-
-assert(coroutine.running() == main)
-
-print"+"
-
-
-print"testing yields inside metamethods"
-
-local mt = {
-  __eq = function(a,b) coroutine.yield(nil, "eq"); return a.x == b.x end,
-  __lt = function(a,b) coroutine.yield(nil, "lt"); return a.x < b.x end,
-  __le = function(a,b) coroutine.yield(nil, "le"); return a - b <= 0 end,
-  __add = function(a,b) coroutine.yield(nil, "add"); return a.x + b.x end,
-  __sub = function(a,b) coroutine.yield(nil, "sub"); return a.x - b.x end,
-  __concat = function(a,b)
-               coroutine.yield(nil, "concat");
-               a = type(a) == "table" and a.x or a
-               b = type(b) == "table" and b.x or b
-               return a .. b
-             end,
-  __index = function (t,k) coroutine.yield(nil, "idx"); return t.k[k] end,
-  __newindex = function (t,k,v) coroutine.yield(nil, "nidx"); t.k[k] = v end,
-}
-
-
-local function new (x)
-  return setmetatable({x = x, k = {}}, mt)
-end
-
-
-local a = new(10)
-local b = new(12)
-local c = new"hello"
-
-local function run (f, t)
-  local i = 1
-  local c = coroutine.wrap(f)
-  while true do
-    local res, stat = c()
-    if res then assert(t[i] == nil); return res, t end
-    assert(stat == t[i])
-    i = i + 1
-  end
-end
-
-
-assert(run(function () if (a>=b) then return '>=' else return '<' end end,
-       {"le", "sub"}) == "<")
--- '<=' using '<'
-mt.__le = nil
-assert(run(function () if (a<=b) then return '<=' else return '>' end end,
-       {"lt"}) == "<=")
-assert(run(function () if (a==b) then return '==' else return '~=' end end,
-       {"eq"}) == "~=")
-
-assert(run(function () return a..b end, {"concat"}) == "1012")
-
-assert(run(function() return a .. b .. c .. a end,
-       {"concat", "concat", "concat"}) == "1012hello10")
-
-assert(run(function() return "a" .. "b" .. a .. "c" .. c .. b .. "x" end,
-       {"concat", "concat", "concat"}) == "ab10chello12x")
-
-assert(run(function ()
-             a.BB = print
-             return a.BB
-           end, {"nidx", "idx"}) == print)
-
--- getuptable & setuptable
-do local _ENV = _ENV
-  f = function () AAA = BBB + 1; return AAA end
-end
-g = new(10); g.k.BBB = 10;
-debug.setupvalue(f, 1, g)
-assert(run(f, {"idx", "nidx", "idx"}) == 11)
-assert(g.k.AAA == 11)
-
-print"+"
-
-print"testing yields inside 'for' iterators"
-
-local f = function (s, i)
-      if i%2 == 0 then coroutine.yield(nil, "for") end
-      if i < s then return i + 1 end
-    end
-
-assert(run(function ()
-             local s = 0
-             for i in f, 4, 0 do s = s + i end
-             return s
-           end, {"for", "for", "for"}) == 10)
-
-
-
--- tests for coroutine API
-if T==nil then
-  (Message or print)('\a\n >>> testC not active: skipping coroutine API tests <<<\n\a')
-  return
-end
-
-print('testing coroutine API')
-
-local function apico (...)
-  local x = {...}
-  return coroutine.wrap(function ()
-    return T.testC(table.unpack(x))
-  end)
-end
-
-local a = {apico(
-[[
-  pushstring errorcode
-  pcallk 1 0 2;
-  invalid command (should not arrive here)
-]],
-[[getctx; gettop; return .]],
-"stackmark",
-error
-)()}
-assert(#a == 6 and
-       a[3] == "stackmark" and
-       a[4] == "errorcode" and
-       a[5] == "ERRRUN" and
-       a[6] == 2)       -- 'ctx' to pcallk
-
-local co = apico(
-  "pushvalue 2; pushnum 10; pcallk 1 2 3; invalid command;",
-  coroutine.yield,
-  "getctx; pushvalue 2; pushstring a; pcallk 1 0 4; invalid command",
-  "getctx; gettop; return .")
-
-assert(co() == 10)
-assert(co(20, 30) == 'a')
-a = {co()}
-assert(#a == 10 and
-       a[2] == coroutine.yield and
-       a[5] == 20 and a[6] == 30 and
-       a[7] == "YIELD" and a[8] == 3 and
-       a[9] == "YIELD" and a[10] == 4)
-assert(not pcall(co))   -- coroutine is dead now
-
-
-f = T.makeCfunc("pushnum 3; pushnum 5; yield 1;")
-co = coroutine.wrap(function ()
-  assert(f() == 23); assert(f() == 23); return 10
-end)
-assert(co(23,16) == 5)
-assert(co(23,16) == 5)
-assert(co(23,16) == 10)
-
-
--- testing coroutines with C bodies
-f = T.makeCfunc([[
-        pushnum 102
-	yieldk	1 U2
-	return 2
-]],
-[[
-	pushnum 23   # continuation
-	gettop
-	return .
-]])
-
-x = coroutine.wrap(f)
-assert(x() == 102)
-assert(x() == 23)
-
-
-f = T.makeCfunc[[pushstring 'a'; pushnum 102; yield 2; ]]
-
-a, b, c, d = T.testC([[newthread; pushvalue 2; xmove 0 3 1; resume 3 0;
-                       pushstatus; xmove 3 0 0;  resume 3 0; pushstatus;
-                       return 4; ]], f)
-
-assert(a == 'YIELD' and b == 'a' and c == 102 and d == 'OK')
-
-
--- testing chain of suspendable C calls
-
-local count = 3   -- number of levels
-
-f = T.makeCfunc([[
-  remove 1;             # remove argument
-  pushvalue U3;         # get selection function
-  call 0 1;             # call it  (result is 'f' or 'yield')
-  pushstring hello      # single argument for selected function
-  pushupvalueindex 2;   # index of continuation program
-  callk 1 -1 .;		# call selected function
-  errorerror		# should never arrive here
-]],
-[[
-  # continuation program
-  pushnum 34	# return value
-  gettop
-  return .     # return all results
-]],
-function ()     -- selection function
-  count = count - 1
-  if count == 0 then return coroutine.yield
-  else return f
-  end
-end
-)
-
-co = coroutine.wrap(function () return f(nil) end)
-assert(co() == "hello")   -- argument to 'yield'
-a = {co()}
--- three '34's (one from each pending C call)
-assert(#a == 3 and a[1] == a[2] and a[2] == a[3] and a[3] == 34)
-
-
--- testing yields with continuations
-
-co = coroutine.wrap(function (...) return
-       T.testC([[
-          getctx
-          yieldk 3 2
-          nonexec error
-       ]],
-       [[  # continuation
-         getctx
-         yieldk 2 3 
-       ]],
-       [[  # continuation
-         getctx
-         yieldk 2 4 
-       ]],
-       [[  # continuation
-          pushvalue 6; pushnum 10; pushnum 20;
-          pcall 2 0     # call should throw an error and execution continues
-          pop 1		# remove error message
-          pushvalue 6
-          getctx
-          pcallk 2 2 5  # call should throw an error and jump to continuation
-          cannot be here!
-       ]],
-       [[  # continuation
-         gettop
-         return .
-       ]],
-       function (a,b)  x=a; y=b; error("errmsg") end,
-       ...
-)
-end)
-
-local a = {co(3,4,6)}; assert(a[1] == 6 and a[2] == "OK" and a[3] == 0)
-a = {co()}; assert(a[1] == "YIELD" and a[2] == 2)
-a = {co()}; assert(a[1] == "YIELD" and a[2] == 3)
-a = {co(7,8)};
--- original arguments
-assert(type(a[1]) == 'string' and type(a[2]) == 'string' and
-     type(a[3]) == 'string' and type(a[4]) == 'string' and
-     type(a[5]) == 'string' and type(a[6]) == 'function')
--- arguments left from fist resume
-assert(a[7] == 3 and a[8] == 4)
--- arguments to last resume
-assert(a[9] == 7 and a[10] == 8)
--- error message and nothing more
-assert(a[11]:find("errmsg") and #a == 11)
--- check arguments to pcallk
-assert(x == "YIELD" and y == 4)
-
-assert(not pcall(co))   -- coroutine should be dead
-
--- testing ctx
-
-a,b = T.testC(
-       [[ pushstring print; pcallk 0 0 12    # error
-          getctx; return 2 ]])
-assert(a == "OK" and b == 0)   -- no ctx outside continuations
-
-
--- bug in nCcalls
-local co = coroutine.wrap(function ()
-  local a = {pcall(pcall,pcall,pcall,pcall,pcall,pcall,pcall,error,"hi")}
-  return pcall(assert, table.unpack(a))
-end)
-
-local a = {co()}
-assert(a[10] == "hi")
-
-
-print'OK'
diff --git a/lua-5.2.2-tests/db.lua b/lua-5.2.2-tests/db.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/db.lua
+++ /dev/null
@@ -1,631 +0,0 @@
--- testing debug library
-
-debug = require "debug"
-
-local function dostring(s) return assert(load(s))() end
-
-print"testing debug library and debug information"
-
-do
-local a=1
-end
-
-function test (s, l, p)
-  collectgarbage()   -- avoid gc during trace
-  local function f (event, line)
-    assert(event == 'line')
-    local l = table.remove(l, 1)
-    if p then print(l, line) end
-    assert(l == line, "wrong trace!!")
-  end
-  debug.sethook(f,"l"); load(s)(); debug.sethook()
-  assert(#l == 0)
-end
-
-
-do
-  assert(not pcall(debug.getinfo, print, "X"))   -- invalid option
-  assert(debug.getinfo(1000) == nil)   -- out of range level
-  assert(debug.getinfo(-1) == nil)     -- out of range level
-  local a = debug.getinfo(print)
-  assert(a.what == "C" and a.short_src == "[C]")
-  a = debug.getinfo(print, "L")
-  assert(a.activelines == nil)
-  local b = debug.getinfo(test, "SfL")
-  assert(b.name == nil and b.what == "Lua" and b.linedefined == 13 and
-         b.lastlinedefined == b.linedefined + 10 and
-         b.func == test and not string.find(b.short_src, "%["))
-  assert(b.activelines[b.linedefined + 1] and
-         b.activelines[b.lastlinedefined])
-  assert(not b.activelines[b.linedefined] and
-         not b.activelines[b.lastlinedefined + 1])
-end
-
-
--- test file and string names truncation
-a = "function f () end"
-local function dostring (s, x) return load(s, x)() end
-dostring(a)
-assert(debug.getinfo(f).short_src == string.format('[string "%s"]', a))
-dostring(a..string.format("; %s\n=1", string.rep('p', 400)))
-assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
-dostring(a..string.format("; %s=1", string.rep('p', 400)))
-assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
-dostring("\n"..a)
-assert(debug.getinfo(f).short_src == '[string "..."]')
-dostring(a, "")
-assert(debug.getinfo(f).short_src == '[string ""]')
-dostring(a, "@xuxu")
-assert(debug.getinfo(f).short_src == "xuxu")
-dostring(a, "@"..string.rep('p', 1000)..'t')
-assert(string.find(debug.getinfo(f).short_src, "^%.%.%.p*t$"))
-dostring(a, "=xuxu")
-assert(debug.getinfo(f).short_src == "xuxu")
-dostring(a, string.format("=%s", string.rep('x', 500)))
-assert(string.find(debug.getinfo(f).short_src, "^x*$"))
-dostring(a, "=")
-assert(debug.getinfo(f).short_src == "")
-a = nil; f = nil;
-
-
-repeat
-  local g = {x = function ()
-    local a = debug.getinfo(2)
-    assert(a.name == 'f' and a.namewhat == 'local')
-    a = debug.getinfo(1)
-    assert(a.name == 'x' and a.namewhat == 'field')
-    return 'xixi'
-  end}
-  local f = function () return 1+1 and (not 1 or g.x()) end
-  assert(f() == 'xixi')
-  g = debug.getinfo(f)
-  assert(g.what == "Lua" and g.func == f and g.namewhat == "" and not g.name)
-
-  function f (x, name)   -- local!
-    name = name or 'f'
-    local a = debug.getinfo(1)
-    assert(a.name == name and a.namewhat == 'local')
-    return x
-  end
-
-  -- breaks in different conditions
-  if 3>4 then break end; f()
-  if 3<4 then a=1 else break end; f()
-  while 1 do local x=10; break end; f()
-  local b = 1
-  if 3>4 then return math.sin(1) end; f()
-  a = 3<4; f()
-  a = 3<4 or 1; f()
-  repeat local x=20; if 4>3 then f() else break end; f() until 1
-  g = {}
-  f(g).x = f(2) and f(10)+f(9)
-  assert(g.x == f(19))
-  function g(x) if not x then return 3 end return (x('a', 'x')) end
-  assert(g(f) == 'a')
-until 1
-
-test([[if
-math.sin(1)
-then
-  a=1
-else
-  a=2
-end
-]], {2,3,4,7})
-
-test([[--
-if nil then
-  a=1
-else
-  a=2
-end
-]], {2,5,6})
-
-test([[a=1
-repeat
-  a=a+1
-until a==3
-]], {1,3,4,3,4})
-
-test([[ do
-  return
-end
-]], {2})
-
-test([[local a
-a=1
-while a<=3 do
-  a=a+1
-end
-]], {1,2,3,4,3,4,3,4,3,5})
-
-test([[while math.sin(1) do
-  if math.sin(1)
-  then break
-  end
-end
-a=1]], {1,2,3,6})
-
-test([[for i=1,3 do
-  a=i
-end
-]], {1,2,1,2,1,2,1,3})
-
-test([[for i,v in pairs{'a','b'} do
-  a=i..v
-end
-]], {1,2,1,2,1,3})
-
-test([[for i=1,4 do a=1 end]], {1,1,1,1,1})
-
-
-
-print'+'
-
--- invalid levels in [gs]etlocal
-assert(not pcall(debug.getlocal, 20, 1))
-assert(not pcall(debug.setlocal, -1, 1, 10))
-
-
--- parameter names
-local function foo (a,b,...) local d, e end
-local co = coroutine.create(foo)
-
-assert(debug.getlocal(foo, 1) == 'a')
-assert(debug.getlocal(foo, 2) == 'b')
-assert(debug.getlocal(foo, 3) == nil)
-assert(debug.getlocal(co, foo, 1) == 'a')
-assert(debug.getlocal(co, foo, 2) == 'b')
-assert(debug.getlocal(co, foo, 3) == nil)
-
-assert(debug.getlocal(print, 1) == nil)
-
-
--- varargs
-local function foo (a, ...)
-  local t = table.pack(...)
-  for i = 1, t.n do
-    local n, v = debug.getlocal(1, -i)
-    assert(n == "(*vararg)" and v == t[i])
-  end
-  assert(not debug.getlocal(1, -(t.n + 1)))
-  assert(not debug.setlocal(1, -(t.n + 1), 30))
-  if t.n > 0 then
-    (function (x)
-      assert(debug.setlocal(2, -1, x) == "(*vararg)")
-      assert(debug.setlocal(2, -t.n, x) == "(*vararg)")
-     end)(430)
-     assert(... == 430)
-  end
-end
-
-foo()
-foo(print)
-foo(200, 3, 4)
-local a = {}
-for i = 1,1000 do a[i] = i end
-foo(table.unpack(a))
-a = nil
-
--- access to vararg in non-vararg function
-local function foo () return debug.getlocal(1, -1) end
-assert(foo(10) == nil)
-
-
-a = {}; L = nil
-local glob = 1
-local oldglob = glob
-debug.sethook(function (e,l)
-  collectgarbage()   -- force GC during a hook
-  local f, m, c = debug.gethook()
-  assert(m == 'crl' and c == 0)
-  if e == "line" then
-    if glob ~= oldglob then
-      L = l-1   -- get the first line where "glob" has changed
-      oldglob = glob
-    end
-  elseif e == "call" then
-      local f = debug.getinfo(2, "f").func
-      a[f] = 1
-  else assert(e == "return")
-  end
-end, "crl")
-
-
-function f(a,b)
-  collectgarbage()
-  local _, x = debug.getlocal(1, 1)
-  local _, y = debug.getlocal(1, 2)
-  assert(x == a and y == b)
-  assert(debug.setlocal(2, 3, "pera") == "AA".."AA")
-  assert(debug.setlocal(2, 4, "maçã") == "B")
-  x = debug.getinfo(2)
-  assert(x.func == g and x.what == "Lua" and x.name == 'g' and
-         x.nups == 1 and string.find(x.source, "^@.*db%.lua$"))
-  glob = glob+1
-  assert(debug.getinfo(1, "l").currentline == L+1)
-  assert(debug.getinfo(1, "l").currentline == L+2)
-end
-
-function foo()
-  glob = glob+1
-  assert(debug.getinfo(1, "l").currentline == L+1)
-end; foo()  -- set L
--- check line counting inside strings and empty lines
-
-_ = 'alo\
-alo' .. [[
-
-]]
---[[
-]]
-assert(debug.getinfo(1, "l").currentline == L+11)  -- check count of lines
-
-
-function g(...)
-  local arg = {...}
-  do local a,b,c; a=math.sin(40); end
-  local feijao
-  local AAAA,B = "xuxu", "mamão"
-  f(AAAA,B)
-  assert(AAAA == "pera" and B == "maçã")
-  do
-     local B = 13
-     local x,y = debug.getlocal(1,5)
-     assert(x == 'B' and y == 13)
-  end
-end
-
-g()
-
-
-assert(a[f] and a[g] and a[assert] and a[debug.getlocal] and not a[print])
-
-
--- tests for manipulating non-registered locals (C and Lua temporaries)
-
-local n, v = debug.getlocal(0, 1)
-assert(v == 0 and n == "(*temporary)")
-local n, v = debug.getlocal(0, 2)
-assert(v == 2 and n == "(*temporary)")
-assert(not debug.getlocal(0, 3))
-assert(not debug.getlocal(0, 0))
-
-function f()
-  assert(select(2, debug.getlocal(2,3)) == 1)
-  assert(not debug.getlocal(2,4))
-  debug.setlocal(2, 3, 10)
-  return 20
-end
-
-function g(a,b) return (a+1) + f() end
-
-assert(g(0,0) == 30)
- 
-
-debug.sethook(nil);
-assert(debug.gethook() == nil)
-
-
--- testing access to function arguments
-
-X = nil
-a = {}
-function a:f (a, b, ...) local arg = {...}; local c = 13 end
-debug.sethook(function (e)
-  assert(e == "call")
-  dostring("XX = 12")  -- test dostring inside hooks
-  -- testing errors inside hooks
-  assert(not pcall(load("a='joao'+1")))
-  debug.sethook(function (e, l) 
-    assert(debug.getinfo(2, "l").currentline == l)
-    local f,m,c = debug.gethook()
-    assert(e == "line")
-    assert(m == 'l' and c == 0)
-    debug.sethook(nil)  -- hook is called only once
-    assert(not X)       -- check that
-    X = {}; local i = 1
-    local x,y
-    while 1 do
-      x,y = debug.getlocal(2, i)
-      if x==nil then break end
-      X[x] = y
-      i = i+1
-    end
-  end, "l")
-end, "c")
-
-a:f(1,2,3,4,5)
-assert(X.self == a and X.a == 1   and X.b == 2 and X.c == nil)
-assert(XX == 12)
-assert(debug.gethook() == nil)
-
-
--- testing upvalue access
-local function getupvalues (f)
-  local t = {}
-  local i = 1
-  while true do
-    local name, value = debug.getupvalue(f, i)
-    if not name then break end
-    assert(not t[name])
-    t[name] = value
-    i = i + 1
-  end
-  return t
-end
-
-local a,b,c = 1,2,3
-local function foo1 (a) b = a; return c end
-local function foo2 (x) a = x; return c+b end
-assert(debug.getupvalue(foo1, 3) == nil)
-assert(debug.getupvalue(foo1, 0) == nil)
-assert(debug.setupvalue(foo1, 3, "xuxu") == nil)
-local t = getupvalues(foo1)
-assert(t.a == nil and t.b == 2 and t.c == 3)
-t = getupvalues(foo2)
-assert(t.a == 1 and t.b == 2 and t.c == 3)
-assert(debug.setupvalue(foo1, 1, "xuxu") == "b")
-assert(({debug.getupvalue(foo2, 3)})[2] == "xuxu")
--- upvalues of C functions are allways "called" "" (the empty string)
-assert(debug.getupvalue(string.gmatch("x", "x"), 1) == "")  
-
-
--- testing count hooks
-local a=0
-debug.sethook(function (e) a=a+1 end, "", 1)
-a=0; for i=1,1000 do end; assert(1000 < a and a < 1012)
-debug.sethook(function (e) a=a+1 end, "", 4)
-a=0; for i=1,1000 do end; assert(250 < a and a < 255)
-local f,m,c = debug.gethook()
-assert(m == "" and c == 4)
-debug.sethook(function (e) a=a+1 end, "", 4000)
-a=0; for i=1,1000 do end; assert(a == 0)
-
-if not _no32 then
-  debug.sethook(print, "", 2^24 - 1)   -- count upperbound
-  local f,m,c = debug.gethook()
-  assert(({debug.gethook()})[3] == 2^24 - 1)
-end
-
-debug.sethook()
-
-
--- tests for tail calls
-local function f (x)
-  if x then
-    assert(debug.getinfo(1, "S").what == "Lua")
-    assert(debug.getinfo(1, "t").istailcall == true)
-    local tail = debug.getinfo(2)
-    assert(tail.func == g1 and tail.istailcall == true)
-    assert(debug.getinfo(3, "S").what == "main")
-    print"+"
-    end
-end
-
-function g(x) return f(x) end
-
-function g1(x) g(x) end
-
-local function h (x) local f=g1; return f(x) end
-
-h(true)
-
-local b = {}
-debug.sethook(function (e) table.insert(b, e) end, "cr")
-h(false)
-debug.sethook()
-local res = {"return",   -- first return (from sethook)
-  "call", "tail call", "call", "tail call",
-  "return", "return",
-  "call",    -- last call (to sethook)
-}
-for i = 1, #res do assert(res[i] == table.remove(b, 1)) end
-
-b = 0
-debug.sethook(function (e)
-                if e == "tail call" then
-                  b = b + 1
-                  assert(debug.getinfo(2, "t").istailcall == true)
-                else
-                  assert(debug.getinfo(2, "t").istailcall == false)
-                end
-              end, "c")
-h(false)
-debug.sethook()
-assert(b == 2)   -- two tail calls
-
-lim = 30000
-if _soft then limit = 3000 end
-local function foo (x)
-  if x==0 then
-    assert(debug.getinfo(2).what == "main")
-    local info = debug.getinfo(1)
-    assert(info.istailcall == true and info.func == foo)
-  else return foo(x-1)
-  end
-end
-
-foo(lim)
-
-
-print"+"
-
-
--- testing local function information
-co = load[[
-  local A = function ()
-    return x
-  end
-  return
-]]
-
-local a = 0
--- 'A' should be visible to debugger only after its complete definition
-debug.sethook(function (e, l)
-  if l == 3 then a = a + 1; assert(debug.getlocal(2, 1) == "(*temporary)")
-  elseif l == 4 then a = a + 1; assert(debug.getlocal(2, 1) == "A")
-  end
-end, "l")
-co()  -- run local function definition
-debug.sethook()  -- turn off hook
-assert(a == 2)   -- ensure all two lines where hooked
-
--- testing traceback
-
-assert(debug.traceback(print) == print)
-assert(debug.traceback(print, 4) == print)
-assert(string.find(debug.traceback("hi", 4), "^hi\n"))
-assert(string.find(debug.traceback("hi"), "^hi\n"))
-assert(not string.find(debug.traceback("hi"), "'traceback'"))
-assert(string.find(debug.traceback("hi", 0), "'traceback'"))
-assert(string.find(debug.traceback(), "^stack traceback:\n"))
-
-
--- testing nparams, nups e isvararg
-local t = debug.getinfo(print, "u")
-assert(t.isvararg == true and t.nparams == 0 and t.nups == 0)
-
-t = debug.getinfo(function (a,b,c) end, "u")
-assert(t.isvararg == false and t.nparams == 3 and t.nups == 0)
-
-t = debug.getinfo(function (a,b,...) return t[a] end, "u")
-assert(t.isvararg == true and t.nparams == 2 and t.nups == 1)
-
-t = debug.getinfo(1)   -- main
-assert(t.isvararg == true and t.nparams == 0 and t.nups == 1 and
-       debug.getupvalue(t.func, 1) == "_ENV")
-
-
--- testing debugging of coroutines
-
-local function checktraceback (co, p, level)
-  local tb = debug.traceback(co, nil, level)
-  local i = 0
-  for l in string.gmatch(tb, "[^\n]+\n?") do
-    assert(i == 0 or string.find(l, p[i]))
-    i = i+1
-  end
-  assert(p[i] == nil)
-end
-
-
-local function f (n)
-  if n > 0 then f(n-1)
-  else coroutine.yield() end
-end
-
-local co = coroutine.create(f)
-coroutine.resume(co, 3)
-checktraceback(co, {"yield", "db.lua", "db.lua", "db.lua", "db.lua"})
-checktraceback(co, {"db.lua", "db.lua", "db.lua", "db.lua"}, 1)
-checktraceback(co, {"db.lua", "db.lua", "db.lua"}, 2)
-checktraceback(co, {"db.lua"}, 4)
-checktraceback(co, {}, 40)
-
-
-co = coroutine.create(function (x)
-       local a = 1
-       coroutine.yield(debug.getinfo(1, "l"))
-       coroutine.yield(debug.getinfo(1, "l").currentline)
-       return a
-     end)
-
-local tr = {}
-local foo = function (e, l) if l then table.insert(tr, l) end end
-debug.sethook(co, foo, "lcr")
-
-local _, l = coroutine.resume(co, 10)
-local x = debug.getinfo(co, 1, "lfLS")
-assert(x.currentline == l.currentline and x.activelines[x.currentline])
-assert(type(x.func) == "function")
-for i=x.linedefined + 1, x.lastlinedefined do
-  assert(x.activelines[i])
-  x.activelines[i] = nil
-end
-assert(next(x.activelines) == nil)   -- no 'extra' elements
-assert(debug.getinfo(co, 2) == nil)
-local a,b = debug.getlocal(co, 1, 1)
-assert(a == "x" and b == 10)
-a,b = debug.getlocal(co, 1, 2)
-assert(a == "a" and b == 1)
-debug.setlocal(co, 1, 2, "hi")
-assert(debug.gethook(co) == foo)
-assert(#tr == 2 and
-       tr[1] == l.currentline-1 and tr[2] == l.currentline)
-
-a,b,c = pcall(coroutine.resume, co)
-assert(a and b and c == l.currentline+1)
-checktraceback(co, {"yield", "in function <"})
-
-a,b = coroutine.resume(co)
-assert(a and b == "hi")
-assert(#tr == 4 and tr[4] == l.currentline+2)
-assert(debug.gethook(co) == foo)
-assert(debug.gethook() == nil)
-checktraceback(co, {})
-
-
--- check traceback of suspended (or dead with error) coroutines
-
-function f(i) if i==0 then error(i) else coroutine.yield(); f(i-1) end end
-
-co = coroutine.create(function (x) f(x) end)
-a, b = coroutine.resume(co, 3)
-t = {"'yield'", "'f'", "in function <"}
-while coroutine.status(co) == "suspended" do
-  checktraceback(co, t)
-  a, b = coroutine.resume(co)
-  table.insert(t, 2, "'f'")   -- one more recursive call to 'f'
-end
-t[1] = "'error'"
-checktraceback(co, t)
-
-
--- test acessing line numbers of a coroutine from a resume inside
--- a C function (this is a known bug in Lua 5.0)
-
-local function g(x)
-    coroutine.yield(x)
-end
-
-local function f (i)
-  debug.sethook(function () end, "l")
-  for j=1,1000 do
-    g(i+j)
-  end
-end
-
-local co = coroutine.wrap(f)
-co(10)
-pcall(co)
-pcall(co)
-
-
-assert(type(debug.getregistry()) == "table")
-
-
--- test tagmethod information
-local a = {}
-local function f (t)
-  local info = debug.getinfo(1);
-  assert(info.namewhat == "metamethod")
-  a.op = info.name
-  return info.name
-end
-setmetatable(a, {
-  __index = f; __add = f; __div = f; __mod = f; __concat = f; __pow = f;
-  __eq = f; __le = f; __lt = f;
-})
-
-local b = setmetatable({}, getmetatable(a))
-
-assert(a[3] == "__index" and a^3 == "__pow" and a..a == "__concat")
-assert(a/3 == "__div" and 3%a == "__mod")
-assert (a==b and a.op == "__eq")
-assert (a>=b and a.op == "__le")
-assert (a>b and a.op == "__lt")
-
-
-print"OK"
-
diff --git a/lua-5.2.2-tests/errors.lua b/lua-5.2.2-tests/errors.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/errors.lua
+++ /dev/null
@@ -1,422 +0,0 @@
-print("testing errors")
-
-local debug = require"debug"
-
--- avoid problems with 'strict' module (which may generate other error messages)
-local mt = getmetatable(_G) or {}
-local oldmm = mt.__index
-mt.__index = nil
-
-function doit (s)
-  local f, msg = load(s)
-  if f == nil then return msg end
-  local cond, msg = pcall(f)
-  return (not cond) and msg
-end
-
-
-function checkmessage (prog, msg)
-  local m = doit(prog)
-  assert(string.find(m, msg, 1, true))
-end
-
-function checksyntax (prog, extra, token, line)
-  local msg = doit(prog)
-  if not string.find(token, "^<%a") and not string.find(token, "^char%(")
-    then token = "'"..token.."'" end
-  token = string.gsub(token, "(%p)", "%%%1")
-  local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]],
-                           line, token)
-  assert(string.find(msg, pt))
-  assert(string.find(msg, msg, 1, true))
-end
-
-
--- test error message with no extra info
-assert(doit("error('hi', 0)") == 'hi')
-
--- test error message with no info
-assert(doit("error()") == nil)
-
-
--- test common errors/errors that crashed in the past
-if not _no32 then
-  assert(doit("table.unpack({}, 1, n=2^30)"))
-end
-assert(doit("a=math.sin()"))
-assert(not doit("tostring(1)") and doit("tostring()"))
-assert(doit"tonumber()")
-assert(doit"repeat until 1; a")
-assert(doit"return;;")
-assert(doit"assert(false)")
-assert(doit"assert(nil)")
-assert(doit("function a (... , ...) end"))
-assert(doit("function a (, ...) end"))
-assert(doit("local t={}; t = t[#t] + 1"))
-
-checksyntax([[
-  local a = {4
-
-]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
-
-
--- tests for better error messages
-
-checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'")
-checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)",
-       "local 'bbbb'")
-checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'")
-checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
-assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'"))
-checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
-checkmessage("a=(1)..{}", "a table value")
-
-aaa = nil
-checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
-checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
-checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
-checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
-assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
-
-checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
-
-checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
-checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
-checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
-checkmessage("aaa={}; x=-aaa", "global 'aaa'")
-assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'"))
-assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'"))
-
-checkmessage("print(print < 10)", "function")
-checkmessage("print(print < print)", "two function")
-
-
--- passing light userdata instead of full userdata
-_G.D = debug
-checkmessage([[
-  -- create light udata
-  local x = D.upvalueid(function () return debug end, 1)
-  D.setuservalue(x, {})
-]], "light userdata")
-_G.D = nil
-
-
--- global functions
-checkmessage("(io.write or print){}", "io.write")
-checkmessage("(collectgarbage or print){}", "collectgarbage")
-
--- tests for field accesses after RK limit
-local t = {}
-for i = 1, 1000 do
-  t[i] = "a = x" .. i
-end
-local s = table.concat(t, "; ")
-t = nil
-checkmessage(s.."; a = bbb + 1", "global 'bbb'")
-checkmessage("local _ENV=_ENV;"..s.."; a = bbb + 1", "global 'bbb'")
-checkmessage(s.."; local t = {}; a = t.bbb + 1", "field 'bbb'")
-checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'")
-
-checkmessage([[aaa=9
-repeat until 3==3
-local x=math.sin(math.cos(3))
-if math.sin(1) == x then return math.sin(1) end   -- tail call
-local a,b = 1, {
-  {x='a'..'b'..'c', y='b', z=x},
-  {1,2,3,4,5} or 3+3<=3+3,
-  3+1>3+1,
-  {d = x and aaa[x or y]}}
-]], "global 'aaa'")
-
-checkmessage([[
-local x,y = {},1
-if math.sin(1) == 0 then return 3 end    -- return
-x.a()]], "field 'a'")
-
-checkmessage([[
-prefix = nil
-insert = nil
-while 1 do
-  local a
-  if nil then break end
-  insert(prefix, a)
-end]], "global 'insert'")
-
-checkmessage([[  -- tail call
-  return math.sin("a")
-]], "'sin'")
-
-checkmessage([[collectgarbage("nooption")]], "invalid option")
-
-checkmessage([[x = print .. "a"]], "concatenate")
-
-checkmessage("getmetatable(io.stdin).__gc()", "no value")
-
-checkmessage([[
-local Var
-local function main()
-  NoSuchName (function() Var=0 end)
-end
-main()
-]], "global 'NoSuchName'")
-print'+'
-
-a = {}; setmetatable(a, {__index = string})
-checkmessage("a:sub()", "bad self")
-checkmessage("string.sub('a', {})", "#2")
-checkmessage("('a'):sub{}", "#1")
-
-checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'")
--- next message may be 'setmetatable' or '_G.setmetatable'
-checkmessage("string.gsub('s', 's', setmetatable)", "setmetatable'")
-
--- tests for errors in coroutines
-
-function f (n)
-  local c = coroutine.create(f)
-  local a,b = coroutine.resume(c)
-  return b
-end
-assert(string.find(f(), "C stack overflow"))
-
-checkmessage("coroutine.yield()", "outside a coroutine")
-
-f1 = function () table.sort({1,2,3}, coroutine.yield) end
-f = coroutine.wrap(function () return pcall(f1) end)
-assert(string.find(select(2, f()), "yield across"))
-
-
--- testing size of 'source' info; size of buffer for that info is
--- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'.
-idsize = 60 - 1
-local function checksize (source)
-  -- syntax error
-  local _, msg = load("x", source)
-  msg = string.match(msg, "^([^:]*):")   -- get source (1st part before ':')
-  assert(msg:len() <= idsize)
-end
-
-for i = 60 - 10, 60 + 10 do   -- check border cases around 60
-  checksize("@" .. string.rep("x", i))   -- file names
-  checksize(string.rep("x", i - 10))     -- string sources
-  checksize("=" .. string.rep("x", i))   -- exact sources
-end
-
-
--- testing line error
-
-local function lineerror (s, l)
-  local err,msg = pcall(load(s))
-  local line = string.match(msg, ":(%d+):")
-  assert((line and line+0) == l)
-end
-
-lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
-lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3)
-lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4)
-lineerror("function a.x.y ()\na=a+1\nend", 1)
-
-lineerror("a = \na\n+\n{}", 3)
-lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6)
-lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3)
-
-lineerror("a\n=\n-\n\nprint\n;", 3)
-
-lineerror([[
-a
-(
-23)
-]], 1)
-
-lineerror([[
-local a = {x = 13}
-a
-.
-x
-(
-23
-)
-]], 2)
-
-lineerror([[
-local a = {x = 13}
-a
-.
-x
-(
-23 + a
-)
-]], 6)
-
-local p = [[
-function g() f() end
-function f(x) error('a', X) end
-g()
-]]
-X=3;lineerror((p), 3)
-X=0;lineerror((p), nil)
-X=1;lineerror((p), 2)
-X=2;lineerror((p), 1)
-
-
-if not _soft then
-  -- several tests that exaust the Lua stack
-  C = 0
-  local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end
-
-  local function checkstackmessage (m)
-    return (string.find(m, "^.-:%d+: stack overflow"))
-  end
-  -- repeated stack overflows (to check stack recovery)
-  assert(checkstackmessage(doit('y()')))
-  print('+')
-  assert(checkstackmessage(doit('y()')))
-  print('+')
-  assert(checkstackmessage(doit('y()')))
-  print('+')
-
-
-  -- error lines in stack overflow
-  C = 0
-  local l1
-  local function g(x)
-    l1 = debug.getinfo(x, "l").currentline; y()
-  end
-  local _, stackmsg = xpcall(g, debug.traceback, 1)
-  print('+')
-  local stack = {}
-  for line in string.gmatch(stackmsg, "[^\n]*") do
-    local curr = string.match(line, ":(%d+):")
-    if curr then table.insert(stack, tonumber(curr)) end
-  end
-  local i=1
-  while stack[i] ~= l1 do
-    assert(stack[i] == l)
-    i = i+1
-  end
-  assert(i > 15)
-
-
-  -- error in error handling
-  local res, msg = xpcall(error, error)
-  assert(not res and type(msg) == 'string')
-  print('+')
-
-  local function f (x)
-    if x==0 then error('a\n')
-    else
-      local aux = function () return f(x-1) end
-      local a,b = xpcall(aux, aux)
-      return a,b
-    end
-  end
-  f(3)
-
-  local function loop (x,y,z) return 1 + loop(x, y, z) end
- 
-  local res, msg = xpcall(loop, function (m)
-    assert(string.find(m, "stack overflow"))
-    local res, msg = pcall(loop)
-    assert(string.find(msg, "error handling"))
-    assert(math.sin(0) == 0)
-    return 15
-  end)
-  assert(msg == 15)
-
-  res, msg = pcall(function ()
-    for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end
-  end)
-  assert(string.find(msg, "too many results"))
-
-end
-
-
--- non string messages
-function f() error{msg='x'} end
-res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
-assert(msg.msg == 'xy')
-
--- xpcall with arguments
-a, b, c = xpcall(string.find, error, "alo", "al")
-assert(a and b == 1 and c == 2)
-a, b, c = xpcall(string.find, function (x) return {} end, true, "al")
-assert(not a and type(b) == "table" and c == nil)
-
-print('+')
-checksyntax("syntax error", "", "error", 1)
-checksyntax("1.000", "", "1.000", 1)
-checksyntax("[[a]]", "", "[[a]]", 1)
-checksyntax("'aa'", "", "'aa'", 1)
-
--- test 255 as first char in a chunk
-checksyntax("\255a = 1", "", "char(255)", 1)
-
-doit('I = load("a=9+"); a=3')
-assert(a==3 and I == nil)
-print('+')
-
-lim = 1000
-if _soft then lim = 100 end
-for i=1,lim do
-  doit('a = ')
-  doit('a = 4+nil')
-end
-
-
--- testing syntax limits
-local function testrep (init, rep)
-  local s = "local a; "..init .. string.rep(rep, 400)
-  local a,b = load(s)
-  assert(not a and string.find(b, "levels"))
-end
-testrep("a=", "{")
-testrep("a=", "(")
-testrep("", "a(")
-testrep("", "do ")
-testrep("", "while a do ")
-testrep("", "if a then else ")
-testrep("", "function foo () ")
-testrep("a=", "a..")
-testrep("a=", "a^")
-
-local s = ("a,"):rep(200).."a=nil"
-local a,b = load(s)
-assert(not a and string.find(b, "levels"))
-
-
--- testing other limits
--- upvalues
-local lim = 127
-local  s = "local function fooA ()\n  local "
-for j = 1,lim do
-  s = s.."a"..j..", "
-end
-s = s.."b,c\n"
-s = s.."local function fooB ()\n  local "
-for j = 1,lim do
-  s = s.."b"..j..", "
-end
-s = s.."b\n"
-s = s.."function fooC () return b+c"
-local c = 1+2
-for j = 1,lim do
-  s = s.."+a"..j.."+b"..j
-  c = c + 2
-end
-s = s.."\nend  end end"
-local a,b = load(s)
-assert(c > 255 and string.find(b, "too many upvalues") and
-       string.find(b, "line 5"))
-
--- local variables
-s = "\nfunction foo ()\n  local "
-for j = 1,300 do
-  s = s.."a"..j..", "
-end
-s = s.."b\n"
-local a,b = load(s)
-assert(string.find(b, "line 2"))
-
-mt.__index = oldmm
-
-print('OK')
diff --git a/lua-5.2.2-tests/events.lua b/lua-5.2.2-tests/events.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/events.lua
+++ /dev/null
@@ -1,388 +0,0 @@
-print('testing metatables')
-
-X = 20; B = 30
-
-_ENV = setmetatable({}, {__index=_G})
-
-collectgarbage()
-
-X = X+10
-assert(X == 30 and _G.X == 20)
-B = false
-assert(B == false)
-B = nil
-assert(B == 30)
-
-assert(getmetatable{} == nil)
-assert(getmetatable(4) == nil)
-assert(getmetatable(nil) == nil)
-a={}; setmetatable(a, {__metatable = "xuxu",
-                    __tostring=function(x) return x.name end})
-assert(getmetatable(a) == "xuxu")
-assert(tostring(a) == nil)
--- cannot change a protected metatable
-assert(pcall(setmetatable, a, {}) == false)
-a.name = "gororoba"
-assert(tostring(a) == "gororoba")
-
-local a, t = {10,20,30; x="10", y="20"}, {}
-assert(setmetatable(a,t) == a)
-assert(getmetatable(a) == t)
-assert(setmetatable(a,nil) == a)
-assert(getmetatable(a) == nil)
-assert(setmetatable(a,t) == a)
-
-
-function f (t, i, e)
-  assert(not e)
-  local p = rawget(t, "parent")
-  return (p and p[i]+3), "dummy return"
-end
-
-t.__index = f
-
-a.parent = {z=25, x=12, [4] = 24}
-assert(a[1] == 10 and a.z == 28 and a[4] == 27 and a.x == "10")
-
-collectgarbage()
-
-a = setmetatable({}, t)
-function f(t, i, v) rawset(t, i, v-3) end
-setmetatable(t, t)   -- causes a bug in 5.1 !
-t.__newindex = f
-a[1] = 30; a.x = "101"; a[5] = 200
-assert(a[1] == 27 and a.x == 98 and a[5] == 197)
-
-
-local c = {}
-a = setmetatable({}, t)
-t.__newindex = c
-a[1] = 10; a[2] = 20; a[3] = 90
-assert(c[1] == 10 and c[2] == 20 and c[3] == 90)
-
-
-do
-  local a;
-  a = setmetatable({}, {__index = setmetatable({},
-                     {__index = setmetatable({},
-                     {__index = function (_,n) return a[n-3]+4, "lixo" end})})})
-  a[0] = 20
-  for i=0,10 do
-    assert(a[i*3] == 20 + i*4)
-  end
-end
-
-
-do  -- newindex
-  local foi
-  local a = {}
-  for i=1,10 do a[i] = 0; a['a'..i] = 0; end
-  setmetatable(a, {__newindex = function (t,k,v) foi=true; rawset(t,k,v) end})
-  foi = false; a[1]=0; assert(not foi)
-  foi = false; a['a1']=0; assert(not foi)
-  foi = false; a['a11']=0; assert(foi)
-  foi = false; a[11]=0; assert(foi)
-  foi = false; a[1]=nil; assert(not foi)
-  foi = false; a[1]=nil; assert(foi)
-end
-
-
-setmetatable(t, nil)
-function f (t, ...) return t, {...} end
-t.__call = f
-
-do
-  local x,y = a(table.unpack{'a', 1})
-  assert(x==a and y[1]=='a' and y[2]==1 and y[3]==nil)
-  x,y = a()
-  assert(x==a and y[1]==nil)
-end
-
-
-local b = setmetatable({}, t)
-setmetatable(b,t)
-
-function f(op)
-  return function (...) cap = {[0] = op, ...} ; return (...) end
-end
-t.__add = f("add")
-t.__sub = f("sub")
-t.__mul = f("mul")
-t.__div = f("div")
-t.__mod = f("mod")
-t.__unm = f("unm")
-t.__pow = f("pow")
-t.__len = f("len")
-
-assert(b+5 == b)
-assert(cap[0] == "add" and cap[1] == b and cap[2] == 5 and cap[3]==nil)
-assert(b+'5' == b)
-assert(cap[0] == "add" and cap[1] == b and cap[2] == '5' and cap[3]==nil)
-assert(5+b == 5)
-assert(cap[0] == "add" and cap[1] == 5 and cap[2] == b and cap[3]==nil)
-assert('5'+b == '5')
-assert(cap[0] == "add" and cap[1] == '5' and cap[2] == b and cap[3]==nil)
-b=b-3; assert(getmetatable(b) == t)
-assert(5-a == 5)
-assert(cap[0] == "sub" and cap[1] == 5 and cap[2] == a and cap[3]==nil)
-assert('5'-a == '5')
-assert(cap[0] == "sub" and cap[1] == '5' and cap[2] == a and cap[3]==nil)
-assert(a*a == a)
-assert(cap[0] == "mul" and cap[1] == a and cap[2] == a and cap[3]==nil)
-assert(a/0 == a)
-assert(cap[0] == "div" and cap[1] == a and cap[2] == 0 and cap[3]==nil)
-assert(a%2 == a)
-assert(cap[0] == "mod" and cap[1] == a and cap[2] == 2 and cap[3]==nil)
-assert(-a == a)
-assert(cap[0] == "unm" and cap[1] == a)
-assert(a^4 == a)
-assert(cap[0] == "pow" and cap[1] == a and cap[2] == 4 and cap[3]==nil)
-assert(a^'4' == a)
-assert(cap[0] == "pow" and cap[1] == a and cap[2] == '4' and cap[3]==nil)
-assert(4^a == 4)
-assert(cap[0] == "pow" and cap[1] == 4 and cap[2] == a and cap[3]==nil)
-assert('4'^a == '4')
-assert(cap[0] == "pow" and cap[1] == '4' and cap[2] == a and cap[3]==nil)
-assert(#a == a)
-assert(cap[0] == "len" and cap[1] == a)
-
-
--- test for rawlen
-t = setmetatable({1,2,3}, {__len = function () return 10 end})
-assert(#t == 10 and rawlen(t) == 3)
-assert(rawlen"abc" == 3)
-assert(not pcall(rawlen, io.stdin))
-assert(not pcall(rawlen, 34))
-assert(not pcall(rawlen))
-
-t = {}
-t.__lt = function (a,b,c)
-  collectgarbage()
-  assert(c == nil)
-  if type(a) == 'table' then a = a.x end
-  if type(b) == 'table' then b = b.x end
- return a<b, "dummy"
-end
-
-function Op(x) return setmetatable({x=x}, t) end
-
-local function test ()
-  assert(not(Op(1)<Op(1)) and (Op(1)<Op(2)) and not(Op(2)<Op(1)))
-  assert(not(1 < Op(1)) and (Op(1) < 2) and not(2 < Op(1)))
-  assert(not(Op('a')<Op('a')) and (Op('a')<Op('b')) and not(Op('b')<Op('a')))
-  assert(not('a' < Op('a')) and (Op('a') < 'b') and not(Op('b') < Op('a')))
-  assert((Op(1)<=Op(1)) and (Op(1)<=Op(2)) and not(Op(2)<=Op(1)))
-  assert((Op('a')<=Op('a')) and (Op('a')<=Op('b')) and not(Op('b')<=Op('a')))
-  assert(not(Op(1)>Op(1)) and not(Op(1)>Op(2)) and (Op(2)>Op(1)))
-  assert(not(Op('a')>Op('a')) and not(Op('a')>Op('b')) and (Op('b')>Op('a')))
-  assert((Op(1)>=Op(1)) and not(Op(1)>=Op(2)) and (Op(2)>=Op(1)))
-  assert((1 >= Op(1)) and not(1 >= Op(2)) and (Op(2) >= 1))
-  assert((Op('a')>=Op('a')) and not(Op('a')>=Op('b')) and (Op('b')>=Op('a')))
-  assert(('a' >= Op('a')) and not(Op('a') >= 'b') and (Op('b') >= Op('a')))
-end
-
-test()
-
-t.__le = function (a,b,c)
-  assert(c == nil)
-  if type(a) == 'table' then a = a.x end
-  if type(b) == 'table' then b = b.x end
- return a<=b, "dummy"
-end
-
-test()  -- retest comparisons, now using both `lt' and `le'
-
-
--- test `partial order'
-
-local function Set(x)
-  local y = {}
-  for _,k in pairs(x) do y[k] = 1 end
-  return setmetatable(y, t)
-end
-
-t.__lt = function (a,b)
-  for k in pairs(a) do
-    if not b[k] then return false end
-    b[k] = nil
-  end
-  return next(b) ~= nil
-end
-
-t.__le = nil
-
-assert(Set{1,2,3} < Set{1,2,3,4})
-assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
-assert((Set{1,2,3,4} <= Set{1,2,3,4}))
-assert((Set{1,2,3,4} >= Set{1,2,3,4}))
-assert((Set{1,3} <= Set{3,5}))   -- wrong!! model needs a `le' method ;-)
-
-t.__le = function (a,b)
-  for k in pairs(a) do
-    if not b[k] then return false end
-  end
-  return true
-end
-
-assert(not (Set{1,3} <= Set{3,5}))   -- now its OK!
-assert(not(Set{1,3} <= Set{3,5}))
-assert(not(Set{1,3} >= Set{3,5}))
-
-t.__eq = function (a,b)
-  for k in pairs(a) do
-    if not b[k] then return false end
-    b[k] = nil
-  end
-  return next(b) == nil
-end
-
-local s = Set{1,3,5}
-assert(s == Set{3,5,1})
-assert(not rawequal(s, Set{3,5,1}))
-assert(rawequal(s, s))
-assert(Set{1,3,5,1} == Set{3,5,1})
-assert(Set{1,3,5} ~= Set{3,5,1,6})
-t[Set{1,3,5}] = 1
-assert(t[Set{1,3,5}] == nil)   -- `__eq' is not valid for table accesses
-
-
-t.__concat = function (a,b,c)
-  assert(c == nil)
-  if type(a) == 'table' then a = a.val end
-  if type(b) == 'table' then b = b.val end
-  if A then return a..b
-  else
-    return setmetatable({val=a..b}, t)
-  end
-end
-
-c = {val="c"}; setmetatable(c, t)
-d = {val="d"}; setmetatable(d, t)
-
-A = true
-assert(c..d == 'cd')
-assert(0 .."a".."b"..c..d.."e".."f"..(5+3).."g" == "0abcdef8g")
-
-A = false
-assert((c..d..c..d).val == 'cdcd')
-x = c..d
-assert(getmetatable(x) == t and x.val == 'cd')
-x = 0 .."a".."b"..c..d.."e".."f".."g"
-assert(x.val == "0abcdefg")
-
-
--- concat metamethod x numbers (bug in 5.1.1)
-c = {}
-local x
-setmetatable(c, {__concat = function (a,b)
-  assert(type(a) == "number" and b == c or type(b) == "number" and a == c)
-  return c
-end})
-assert(c..5 == c and 5 .. c == c)
-assert(4 .. c .. 5 == c and 4 .. 5 .. 6 .. 7 .. c == c)
-
-
--- test comparison compatibilities
-local t1, t2, c, d
-t1 = {};  c = {}; setmetatable(c, t1)
-d = {}
-t1.__eq = function () return true end
-t1.__lt = function () return true end
-setmetatable(d, t1)
-assert(c == d and c < d and not(d <= c))
-t2 = {}
-t2.__eq = t1.__eq
-t2.__lt = t1.__lt
-setmetatable(d, t2)
-assert(c == d and c < d and not(d <= c))
-
-
-
--- test for several levels of calls
-local i
-local tt = {
-  __call = function (t, ...)
-    i = i+1
-    if t.f then return t.f(...)
-    else return {...}
-    end
-  end
-}
-
-local a = setmetatable({}, tt)
-local b = setmetatable({f=a}, tt)
-local c = setmetatable({f=b}, tt)
-
-i = 0
-x = c(3,4,5)
-assert(i == 3 and x[1] == 3 and x[3] == 5)
-
-
-assert(_G.X == 20)
-
-print'+'
-
-local _g = _G
-_ENV = setmetatable({}, {__index=function (_,k) return _g[k] end})
-
-
-a = {}
-rawset(a, "x", 1, 2, 3)
-assert(a.x == 1 and rawget(a, "x", 3) == 1)
-
-print '+'
-
--- testing metatables for basic types
-local debug = require'debug'
-mt = {}
-debug.setmetatable(10, mt)
-assert(getmetatable(-2) == mt)
-mt.__index = function (a,b) return a+b end
-assert((10)[3] == 13)
-assert((10)["3"] == 13)
-debug.setmetatable(23, nil)
-assert(getmetatable(-2) == nil)
-
-debug.setmetatable(true, mt)
-assert(getmetatable(false) == mt)
-mt.__index = function (a,b) return a or b end
-assert((true)[false] == true)
-assert((false)[false] == false)
-debug.setmetatable(false, nil)
-assert(getmetatable(true) == nil)
-
-debug.setmetatable(nil, mt)
-assert(getmetatable(nil) == mt)
-mt.__add = function (a,b) return (a or 0) + (b or 0) end
-assert(10 + nil == 10)
-assert(nil + 23 == 23)
-assert(nil + nil == 0)
-debug.setmetatable(nil, nil)
-assert(getmetatable(nil) == nil)
-
-debug.setmetatable(nil, {})
-
-
--- loops in delegation
-a = {}; setmetatable(a, a); a.__index = a; a.__newindex = a
-assert(not pcall(function (a,b) return a[b] end, a, 10))
-assert(not pcall(function (a,b,c) a[b] = c end, a, 10, true))
-
--- bug in 5.1
-T, K, V = nil
-grandparent = {}
-grandparent.__newindex = function(t,k,v) T=t; K=k; V=v end
-
-parent = {}
-parent.__newindex = parent
-setmetatable(parent, grandparent)
-
-child = setmetatable({}, parent)
-child.foo = 10      --> CRASH (on some machines)
-assert(T == parent and K == "foo" and V == 10)
-
-print 'OK'
-
-return 12
-
-
diff --git a/lua-5.2.2-tests/files.lua b/lua-5.2.2-tests/files.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/files.lua
+++ /dev/null
@@ -1,615 +0,0 @@
-debug = require "debug"
-
-assert(type(os.getenv"PATH") == "string")
-
-assert(io.input(io.stdin) == io.stdin)
-assert(not pcall(io.input, "non-existent-file"))
-assert(io.output(io.stdout) == io.stdout)
-
--- cannot close standard files
-assert(not io.close(io.stdin) and
-       not io.stdout:close() and
-       not io.stderr:close())
-
-
-assert(type(io.input()) == "userdata" and io.type(io.output()) == "file")
-assert(type(io.stdin) == "userdata" and io.type(io.stderr) == "file")
-assert(io.type(8) == nil)
-local a = {}; setmetatable(a, {})
-assert(io.type(a) == nil)
-
-local a,b,c = io.open('xuxu_nao_existe')
-assert(not a and type(b) == "string" and type(c) == "number")
-
-a,b,c = io.open('/a/b/c/d', 'w')
-assert(not a and type(b) == "string" and type(c) == "number")
-
-local file = os.tmpname()
-local f, msg = io.open(file, "w")
-if not f then
-  (Message or print)("'os.tmpname' file cannot be open; skipping file tests")
-
-else  --{  most tests here need tmpname
-f:close()
-
-print('testing i/o')
-
-local otherfile = os.tmpname()
-
-assert(not pcall(io.open, file, "rw"))     -- invalid mode
-assert(not pcall(io.open, file, "rb+"))    -- invalid mode
-assert(not pcall(io.open, file, "r+bk"))   -- invalid mode
-assert(not pcall(io.open, file, ""))       -- invalid mode
-assert(not pcall(io.open, file, "+"))      -- invalid mode
-assert(not pcall(io.open, file, "b"))      -- invalid mode
-assert(io.open(file, "r+b")):close()
-assert(io.open(file, "r+")):close()
-assert(io.open(file, "rb")):close()
-
-assert(os.setlocale('C', 'all'))
-
-io.input(io.stdin); io.output(io.stdout);
-
-os.remove(file)
-assert(loadfile(file) == nil)
-assert(io.open(file) == nil)
-io.output(file)
-assert(io.output() ~= io.stdout)
-
-assert(io.output():seek() == 0)
-assert(io.write("alo alo"):seek() == string.len("alo alo"))
-assert(io.output():seek("cur", -3) == string.len("alo alo")-3)
-assert(io.write("joao"))
-assert(io.output():seek("end") == string.len("alo joao"))
-
-assert(io.output():seek("set") == 0)
-
-assert(io.write('"álo"', "{a}\n", "second line\n", "third line \n"))
-assert(io.write('çfourth_line'))
-io.output(io.stdout)
-collectgarbage()  -- file should be closed by GC
-assert(io.input() == io.stdin and rawequal(io.output(), io.stdout))
-print('+')
-
--- test GC for files
-collectgarbage()
-for i=1,120 do
-  for i=1,5 do
-    io.input(file)
-    assert(io.open(file, 'r'))
-    io.lines(file)
-  end
-  collectgarbage()
-end
-
-io.input():close()
-io.close()
-
-assert(os.rename(file, otherfile))
-assert(os.rename(file, otherfile) == nil)
-
-io.output(io.open(otherfile, "ab"))
-assert(io.write("\n\n\t\t  3450\n"));
-io.close()
-
--- test line generators
-assert(not pcall(io.lines, "non-existent-file"))
-assert(os.rename(otherfile, file))
-io.output(otherfile)
-local f = io.lines(file)
-while f() do end;
-assert(not pcall(f))  -- read lines after EOF
-assert(not pcall(f))  -- read lines after EOF
--- copy from file to otherfile
-for l in io.lines(file) do io.write(l, "\n") end
-io.close()
--- copy from otherfile back to file
-local f = assert(io.open(otherfile))
-assert(io.type(f) == "file")
-io.output(file)
-assert(io.output():read() == nil)
-for l in f:lines() do io.write(l, "\n") end
-assert(tostring(f):sub(1, 5) == "file ")
-assert(f:close()); io.close()
-assert(not pcall(io.close, f))   -- error trying to close again
-assert(tostring(f) == "file (closed)")
-assert(io.type(f) == "closed file")
-io.input(file)
-f = io.open(otherfile):lines()
-for l in io.lines() do assert(l == f()) end
-f = nil; collectgarbage()
-assert(os.remove(otherfile))
-
-io.input(file)
-do  -- test error returns
-  local a,b,c = io.input():write("xuxu")
-  assert(not a and type(b) == "string" and type(c) == "number")
-end
-assert(io.read(0) == "")   -- not eof
-assert(io.read(5, '*l') == '"álo"')
-assert(io.read(0) == "")
-assert(io.read() == "second line")
-local x = io.input():seek()
-assert(io.read() == "third line ")
-assert(io.input():seek("set", x))
-assert(io.read('*L') == "third line \n")
-assert(io.read(1) == "ç")
-assert(io.read(string.len"fourth_line") == "fourth_line")
-assert(io.input():seek("cur", -string.len"fourth_line"))
-assert(io.read() == "fourth_line")
-assert(io.read() == "")  -- empty line
-assert(io.read('*n') == 3450)
-assert(io.read(1) == '\n')
-assert(io.read(0) == nil)  -- end of file
-assert(io.read(1) == nil)  -- end of file
-assert(io.read(30000) == nil)  -- end of file
-assert(({io.read(1)})[2] == nil)
-assert(io.read() == nil)  -- end of file
-assert(({io.read()})[2] == nil)
-assert(io.read('*n') == nil)  -- end of file
-assert(({io.read('*n')})[2] == nil)
-assert(io.read('*a') == '')  -- end of file (OK for `*a')
-assert(io.read('*a') == '')  -- end of file (OK for `*a')
-collectgarbage()
-print('+')
-io.close(io.input())
-assert(not pcall(io.read))
-
-assert(os.remove(file))
-
-local t = '0123456789'
-for i=1,12 do t = t..t; end
-assert(string.len(t) == 10*2^12)
-
-io.output(file)
-io.write("alo"):write("\n")
-io.close()
-assert(not pcall(io.write))
-local f = io.open(file, "a+b")
-io.output(f)
-collectgarbage()
-
-assert(io.write(' ' .. t .. ' '))
-assert(io.write(';', 'end of file\n'))
-f:flush(); io.flush()
-f:close()
-print('+')
-
-io.input(file)
-assert(io.read() == "alo")
-assert(io.read(1) == ' ')
-assert(io.read(string.len(t)) == t)
-assert(io.read(1) == ' ')
-assert(io.read(0))
-assert(io.read('*a') == ';end of file\n')
-assert(io.read(0) == nil)
-assert(io.close(io.input()))
-
-
--- test errors in read/write
-do
-  local function ismsg (m)
-    -- error message is not a code number
-    return (type(m) == "string" and tonumber(m) == nil)
-  end
-
-  -- read
-  local f = io.open(file, "w")
-  local r, m, c = f:read()
-  assert(r == nil and ismsg(m) and type(c) == "number")
-  assert(f:close())
-  -- write
-  f = io.open(file, "r")
-  r, m, c = f:write("whatever")
-  assert(r == nil and ismsg(m) and type(c) == "number")
-  assert(f:close())
-  -- lines
-  f = io.open(file, "w")
-  r, m = pcall(f:lines())
-  assert(r == false and ismsg(m))
-  assert(f:close())
-end
-
-assert(os.remove(file))
-
--- test for *L format
-io.output(file); io.write"\n\nline\nother":close()
-io.input(file)
-assert(io.read"*L" == "\n")
-assert(io.read"*L" == "\n")
-assert(io.read"*L" == "line\n")
-assert(io.read"*L" == "other")
-assert(io.read"*L" == nil)
-io.input():close()
-
-local f = assert(io.open(file))
-local s = ""
-for l in f:lines("*L") do s = s .. l end
-assert(s == "\n\nline\nother")
-f:close()
-
-io.input(file)
-s = ""
-for l in io.lines(nil, "*L") do s = s .. l end
-assert(s == "\n\nline\nother")
-io.input():close()
-
-s = ""
-for l in io.lines(file, "*L") do s = s .. l end
-assert(s == "\n\nline\nother")
-
-s = ""
-for l in io.lines(file, "*l") do s = s .. l end
-assert(s == "lineother")
-
-io.output(file); io.write"a = 10 + 34\na = 2*a\na = -a\n":close()
-local t = {}
-load(io.lines(file, "*L"), nil, nil, t)()
-assert(t.a == -((10 + 34) * 2))
-
-
--- test for multipe arguments in 'lines'
-io.output(file); io.write"0123456789\n":close()
-for a,b in io.lines(file, 1, 1) do
-  if a == "\n" then assert(b == nil)
-  else assert(tonumber(a) == b - 1)
-  end
-end
-
-for a,b,c in io.lines(file, 1, 2, "*a") do
-  assert(a == "0" and b == "12" and c == "3456789\n")
-end
-
-for a,b,c in io.lines(file, "*a", 0, 1) do
-  if a == "" then break end
-  assert(a == "0123456789\n" and b == nil and c == nil)
-end
-collectgarbage()   -- to close file in previous iteration
-
-io.output(file); io.write"00\n10\n20\n30\n40\n":close()
-for a, b in io.lines(file, "*n", "*n") do
-  if a == 40 then assert(b == nil)
-  else assert(a == b - 10)
-  end
-end
-
-
--- test load x lines
-io.output(file);
-io.write[[
-local y
-= X
-X =
-X *
-2 +
-X;
-X =
-X
--                                   y;
-]]:close()
-_G.X = 1
-assert(not load(io.lines(file)))
-collectgarbage()   -- to close file in previous iteration
-load(io.lines(file, "*L"))()
-assert(_G.X == 2)
-load(io.lines(file, 1))()
-assert(_G.X == 4)
-load(io.lines(file, 3))()
-assert(_G.X == 8)
-
-print('+')
-
-local x1 = "string\n\n\\com \"\"''coisas [[estranhas]] ]]'"
-io.output(file)
-assert(io.write(string.format("x2 = %q\n-- comment without ending EOS", x1)))
-io.close()
-assert(loadfile(file))()
-assert(x1 == x2)
-print('+')
-assert(os.remove(file))
-assert(os.remove(file) == nil)
-assert(os.remove(otherfile) == nil)
-
--- testing loadfile
-local function testloadfile (s, expres)
-  io.output(file)
-  if s then io.write(s) end
-  io.close()
-  local res = assert(loadfile(file))()
-  assert(os.remove(file))
-  assert(res == expres)
-end
-
--- loading empty file
-testloadfile(nil, nil)
-
--- loading file with initial comment without end of line
-testloadfile("# a non-ending comment", nil)
-
-
--- checking Unicode BOM in files
-testloadfile("\xEF\xBB\xBF# some comment\nreturn 234", 234)
-testloadfile("\xEF\xBB\xBFreturn 239", 239)
-testloadfile("\xEF\xBB\xBF", nil)   -- empty file with a BOM
-
-
--- checking line numbers in files with initial comments
-testloadfile("# a comment\nreturn debug.getinfo(1).currentline", 2)
-
-
--- loading binary file
-io.output(io.open(file, "wb"))
-assert(io.write(string.dump(function () return 10, '\0alo\255', 'hi' end)))
-io.close()
-a, b, c = assert(loadfile(file))()
-assert(a == 10 and b == "\0alo\255" and c == "hi")
-assert(os.remove(file))
-
--- bug in 5.2.1
-do
-  io.output(io.open(file, "wb"))
-  -- save function with no upvalues
-  assert(io.write(string.dump(function () return 1 end)))
-  io.close()
-  f = assert(loadfile(file, "b", {}))
-  assert(type(f) == "function" and f() == 1)
-  assert(os.remove(file))
-end
-
--- loading binary file with initial comment
-io.output(io.open(file, "wb"))
-assert(io.write("#this is a comment for a binary file\0\n",
-                string.dump(function () return 20, '\0\0\0' end)))
-io.close()
-a, b, c = assert(loadfile(file))()
-assert(a == 20 and b == "\0\0\0" and c == nil)
-assert(os.remove(file))
-
-
--- 'loadfile' with 'env'
-do
-  local f = io.open(file, 'w')
-  f:write[[
-    if (...) then a = 15; return b, c, d
-    else return _ENV
-    end
-  ]]
-  f:close()
-  local t = {b = 12, c = "xuxu", d = print}
-  local f = assert(loadfile(file, 't', t))
-  local b, c, d = f(1)
-  assert(t.a == 15 and b == 12 and c == t.c and d == print)
-  assert(f() == t)
-  f = assert(loadfile(file, 't', nil))
-  assert(f() == nil)
-  f = assert(loadfile(file))
-  assert(f() == _G)
-  assert(os.remove(file))
-end
-
-
--- 'loadfile' x modes
-do
-  io.open(file, 'w'):write("return 10"):close()
-  local s, m = loadfile(file, 'b')
-  assert(not s and string.find(m, "a text chunk"))
-  io.open(file, 'w'):write("\27 return 10"):close()
-  local s, m = loadfile(file, 't')
-  assert(not s and string.find(m, "a binary chunk"))
-  assert(os.remove(file))
-end
-
-
-io.output(file)
-assert(io.write("qualquer coisa\n"))
-assert(io.write("mais qualquer coisa"))
-io.close()
-assert(io.output(assert(io.open(otherfile, 'wb')))
-       :write("outra coisa\0\1\3\0\0\0\0\255\0")
-       :close())
-
-local filehandle = assert(io.open(file, 'r+'))
-local otherfilehandle = assert(io.open(otherfile, 'rb'))
-assert(filehandle ~= otherfilehandle)
-assert(type(filehandle) == "userdata")
-assert(filehandle:read('*l') == "qualquer coisa")
-io.input(otherfilehandle)
-assert(io.read(string.len"outra coisa") == "outra coisa")
-assert(filehandle:read('*l') == "mais qualquer coisa")
-filehandle:close();
-assert(type(filehandle) == "userdata")
-io.input(otherfilehandle)
-assert(io.read(4) == "\0\1\3\0")
-assert(io.read(3) == "\0\0\0")
-assert(io.read(0) == "")        -- 255 is not eof
-assert(io.read(1) == "\255")
-assert(io.read('*a') == "\0")
-assert(not io.read(0))
-assert(otherfilehandle == io.input())
-otherfilehandle:close()
-assert(os.remove(file))
-assert(os.remove(otherfile))
-collectgarbage()
-
-io.output(file)
-  :write[[
- 123.4	-56e-2  not a number
-second line
-third line
-
-and the rest of the file
-]]
-  :close()
-io.input(file)
-local _,a,b,c,d,e,h,__ = io.read(1, '*n', '*n', '*l', '*l', '*l', '*a', 10)
-assert(io.close(io.input()))
-assert(_ == ' ' and __ == nil)
-assert(type(a) == 'number' and a==123.4 and b==-56e-2)
-assert(d=='second line' and e=='third line')
-assert(h==[[
-
-and the rest of the file
-]])
-assert(os.remove(file))
-collectgarbage()
-
--- testing buffers
-do
-  local f = assert(io.open(file, "w"))
-  local fr = assert(io.open(file, "r"))
-  assert(f:setvbuf("full", 2000))
-  f:write("x")
-  assert(fr:read("*all") == "")  -- full buffer; output not written yet
-  f:close()
-  fr:seek("set")
-  assert(fr:read("*all") == "x")   -- `close' flushes it
-  f = assert(io.open(file), "w")
-  assert(f:setvbuf("no"))
-  f:write("x")
-  fr:seek("set")
-  assert(fr:read("*all") == "x")  -- no buffer; output is ready
-  f:close()
-  f = assert(io.open(file, "a"))
-  assert(f:setvbuf("line"))
-  f:write("x")
-  fr:seek("set", 1)
-  assert(fr:read("*all") == "")   -- line buffer; no output without `\n'
-  f:write("a\n"):seek("set", 1)
-  assert(fr:read("*all") == "xa\n")  -- now we have a whole line
-  f:close(); fr:close()
-  assert(os.remove(file))
-end
-
-
-if not _soft then
-  print("testing large files (> BUFSIZ)")
-  io.output(file)
-  for i=1,5001 do io.write('0123456789123') end
-  io.write('\n12346'):close()
-  io.input(file)
-  local x = io.read('*a')
-  io.input():seek('set', 0)
-  local y = io.read(30001)..io.read(1005)..io.read(0)..
-            io.read(1)..io.read(100003)
-  assert(x == y and string.len(x) == 5001*13 + 6)
-  io.input():seek('set', 0)
-  y = io.read()  -- huge line
-  assert(x == y..'\n'..io.read())
-  assert(io.read() == nil)
-  io.close(io.input())
-  assert(os.remove(file))
-  x = nil; y = nil
-end
-
-if not _noposix then
-  print("testing popen/pclose and execute")
-  local tests = {
-    -- command,   what,  code
-    {"ls > /dev/null", "ok"},
-    {"not-to-be-found-command", "exit"},
-    {"exit 3", "exit", 3},
-    {"exit 129", "exit", 129},
-    {"kill -s HUP $$", "signal", 1},
-    {"kill -s KILL $$", "signal", 9},
-    {"sh -c 'kill -s HUP $$'", "exit"},
-    {'lua -e "os.exit(20, true)"', "exit", 20},
-  }
-  print("\n(some error messages are expected now)")
-  for _, v in ipairs(tests) do
-    local x, y, z = io.popen(v[1]):close()
-    local x1, y1, z1 = os.execute(v[1])
-    assert(x == x1 and y == y1 and z == z1)
-    if v[2] == "ok" then
-      assert(x == true and y == 'exit' and z == 0)
-    else
-      assert(x == nil and y == v[2])   -- correct status and 'what'
-      -- correct code if known (but always different from 0)
-      assert((v[3] == nil and z > 0) or v[3] == z)
-    end
-  end
-end
-
-
--- testing tmpfile
-f = io.tmpfile()
-assert(io.type(f) == "file")
-f:write("alo")
-f:seek("set")
-assert(f:read"*a" == "alo")
-
-end --}
-
-print'+'
-
-
-assert(os.date("") == "")
-assert(os.date("!") == "")
-local x = string.rep("a", 10000)
-assert(os.date(x) == x)
-local t = os.time()
-D = os.date("*t", t)
-assert(os.date(string.rep("%d", 1000), t) ==
-       string.rep(os.date("%d", t), 1000))
-assert(os.date(string.rep("%", 200)) == string.rep("%", 100))
-
-local t = os.time()
-D = os.date("*t", t)
-load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
-  D.hour==%H and D.min==%M and D.sec==%S and
-  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
-
-assert(not pcall(os.date, "%9"))   -- invalid conversion specifier
-assert(not pcall(os.date, "%"))   -- invalid conversion specifier
-assert(not pcall(os.date, "%O"))   -- invalid conversion specifier
-assert(not pcall(os.date, "%E"))   -- invalid conversion specifier
-assert(not pcall(os.date, "%Ea"))   -- invalid conversion specifier
-
-if not _noposix then
-  assert(type(os.date("%Ex")) == 'string')
-  assert(type(os.date("%Oy")) == 'string')
-end
-
-assert(os.time(D) == t)
-assert(not pcall(os.time, {hour = 12}))
-
-D = os.date("!*t", t)
-load(os.date([[!assert(D.year==%Y and D.month==%m and D.day==%d and
-  D.hour==%H and D.min==%M and D.sec==%S and
-  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
-
-do
-  local D = os.date("*t")
-  local t = os.time(D)
-  assert(type(D.isdst) == 'boolean')
-  D.isdst = nil
-  local t1 = os.time(D)
-  assert(t == t1)   -- if isdst is absent uses correct default
-end
-
-t = os.time(D)
-D.year = D.year-1;
-local t1 = os.time(D)
--- allow for leap years
-assert(math.abs(os.difftime(t,t1)/(24*3600) - 365) < 2)
-
-t = os.time()
-t1 = os.time(os.date("*t"))
-assert(os.difftime(t1,t) <= 2)
-
-local t1 = os.time{year=2000, month=10, day=1, hour=23, min=12}
-local t2 = os.time{year=2000, month=10, day=1, hour=23, min=10, sec=19}
-assert(os.difftime(t1,t2) == 60*2-19)
-
-io.output(io.stdout)
-local d = os.date('%d')
-local m = os.date('%m')
-local a = os.date('%Y')
-local ds = os.date('%w') + 1
-local h = os.date('%H')
-local min = os.date('%M')
-local s = os.date('%S')
-io.write(string.format('test done on %2.2d/%2.2d/%d', d, m, a))
-io.write(string.format(', at %2.2d:%2.2d:%2.2d\n', h, min, s))
-io.write(string.format('%s\n', _VERSION))
-
-
diff --git a/lua-5.2.2-tests/gc.lua b/lua-5.2.2-tests/gc.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/gc.lua
+++ /dev/null
@@ -1,575 +0,0 @@
-print('testing garbage collection')
-
-collectgarbage()
-
-assert(collectgarbage("isrunning"))
-
-local function gcinfo () return collectgarbage"count" * 1024 end
-
-
--- test weird parameters
-do
-  -- save original parameters
-  local a = collectgarbage("setpause", 200)
-  local b = collectgarbage("setstepmul", 200)
-  local t = {0, 2, 10, 90, 500, 5000, 30000, 2^31 - 2}
-  for i = 1, #t do
-    local p = t[i]
-    for j = 1, #t do
-      local m = t[j]
-      collectgarbage("setpause", p)
-      collectgarbage("setstepmul", m)
-      collectgarbage("step", 0)
-      collectgarbage("step", 10000)
-    end
-  end
-  -- restore original parameters
-  collectgarbage("setpause", a)
-  collectgarbage("setstepmul", b)
-  collectgarbage()
-end
-
-
-_G["while"] = 234
-
-limit = 5000
-
-
-local function GC1 ()
-  local u
-  local b     -- must be declared after 'u' (to be above it in the stack)
-  local finish = false
-  u = setmetatable({}, {__gc = function () finish = true end})
-  b = {34}
-  repeat u = {} until finish
-  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
-
-  finish = false; local i = 1
-  u = setmetatable({}, {__gc = function () finish = true end})
-  repeat i = i + 1; u = i .. i until finish
-  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
-
-  finish = false
-  u = setmetatable({}, {__gc = function () finish = true end})
-  repeat local i; u = function () return i end until finish
-  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
-end
-
-local function GC()  GC1(); GC1() end
-
-
-contCreate = 0
-
-print('tables')
-while contCreate <= limit do
-  local a = {}; a = nil
-  contCreate = contCreate+1
-end
-
-a = "a"
-
-contCreate = 0
-print('strings')
-while contCreate <= limit do
-  a = contCreate .. "b";
-  a = string.gsub(a, '(%d%d*)', string.upper)
-  a = "a"
-  contCreate = contCreate+1
-end
-
-
-contCreate = 0
-
-a = {}
-
-print('functions')
-function a:test ()
-  while contCreate <= limit do
-    load(string.format("function temp(a) return 'a%d' end", contCreate))()
-    assert(temp() == string.format('a%d', contCreate))
-    contCreate = contCreate+1
-  end
-end
-
-a:test()
-
--- collection of functions without locals, globals, etc.
-do local f = function () end end
-
-
-print("functions with errors")
-prog = [[
-do
-  a = 10;
-  function foo(x,y)
-    a = sin(a+0.456-0.23e-12);
-    return function (z) return sin(%x+z) end
-  end
-  local x = function (w) a=a+w; end
-end
-]]
-do
-  local step = 1
-  if _soft then step = 13 end
-  for i=1, string.len(prog), step do
-    for j=i, string.len(prog), step do
-      pcall(load(string.sub(prog, i, j)))
-    end
-  end
-end
-
-foo = nil
-print('long strings')
-x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
-assert(string.len(x)==80)
-s = ''
-n = 0
-k = 300
-while n < k do s = s..x; n=n+1; j=tostring(n)  end
-assert(string.len(s) == k*80)
-s = string.sub(s, 1, 20000)
-s, i = string.gsub(s, '(%d%d%d%d)', math.sin)
-assert(i==20000/4)
-s = nil
-x = nil
-
-assert(_G["while"] == 234)
-
-local k,b = collectgarbage("count")
-assert(k*1024 == math.floor(k)*1024 + b)
-
-print("steps")
-
-local bytes = gcinfo()
-while 1 do
-  local nbytes = gcinfo()
-  if nbytes < bytes then break end   -- run until gc
-  bytes = nbytes
-  a = {}
-end
-
-print("steps (2)")
-
-local function dosteps (siz)
-  assert(not collectgarbage("isrunning"))
-  collectgarbage()
-  assert(not collectgarbage("isrunning"))
-  local a = {}
-  for i=1,100 do a[i] = {{}}; local b = {} end
-  local x = gcinfo()
-  local i = 0
-  repeat   -- do steps until it completes a collection cycle
-    i = i+1
-  until collectgarbage("step", siz)
-  assert(gcinfo() < x)
-  return i
-end
-
-collectgarbage"stop"
-
-if not _port then
-  -- test the "size" of basic GC steps (whatever they mean...)
-  assert(dosteps(0) > 10)
-  assert(dosteps(10) < dosteps(2))
-end
-
--- collector should do a full collection with so many steps
-assert(dosteps(100000) == 1)
-assert(collectgarbage("step", 1000000) == true)
-assert(collectgarbage("step", 1000000) == true)
-
-assert(not collectgarbage("isrunning"))
-collectgarbage"restart"
-assert(collectgarbage("isrunning"))
-
-
-if not _port then
-  -- test the pace of the collector
-  collectgarbage(); collectgarbage()
-  local x = gcinfo()
-  collectgarbage"stop"
-  assert(not collectgarbage("isrunning"))
-  repeat
-    local a = {}
-  until gcinfo() > 3 * x
-  collectgarbage"restart"
-  assert(collectgarbage("isrunning"))
-  repeat
-    local a = {}
-  until gcinfo() <= x * 2
-end
-
-
-print("clearing tables")
-lim = 15
-a = {}
--- fill a with `collectable' indices
-for i=1,lim do a[{}] = i end
-b = {}
-for k,v in pairs(a) do b[k]=v end
--- remove all indices and collect them
-for n in pairs(b) do
-  a[n] = nil
-  assert(type(n) == 'table' and next(n) == nil)
-  collectgarbage()
-end
-b = nil
-collectgarbage()
-for n in pairs(a) do error'cannot be here' end
-for i=1,lim do a[i] = i end
-for i=1,lim do assert(a[i] == i) end
-
-
-print('weak tables')
-a = {}; setmetatable(a, {__mode = 'k'});
--- fill a with some `collectable' indices
-for i=1,lim do a[{}] = i end
--- and some non-collectable ones
-for i=1,lim do a[i] = i end
-for i=1,lim do local s=string.rep('@', i); a[s] = s..'#' end
-collectgarbage()
-local i = 0
-for k,v in pairs(a) do assert(k==v or k..'#'==v); i=i+1 end
-assert(i == 2*lim)
-
-a = {}; setmetatable(a, {__mode = 'v'});
-a[1] = string.rep('b', 21)
-collectgarbage()
-assert(a[1])   -- strings are *values*
-a[1] = nil
--- fill a with some `collectable' values (in both parts of the table)
-for i=1,lim do a[i] = {} end
-for i=1,lim do a[i..'x'] = {} end
--- and some non-collectable ones
-for i=1,lim do local t={}; a[t]=t end
-for i=1,lim do a[i+lim]=i..'x' end
-collectgarbage()
-local i = 0
-for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
-assert(i == 2*lim)
-
-a = {}; setmetatable(a, {__mode = 'vk'});
-local x, y, z = {}, {}, {}
--- keep only some items
-a[1], a[2], a[3] = x, y, z
-a[string.rep('$', 11)] = string.rep('$', 11)
--- fill a with some `collectable' values
-for i=4,lim do a[i] = {} end
-for i=1,lim do a[{}] = i end
-for i=1,lim do local t={}; a[t]=t end
-collectgarbage()
-assert(next(a) ~= nil)
-local i = 0
-for k,v in pairs(a) do
-  assert((k == 1 and v == x) or
-         (k == 2 and v == y) or
-         (k == 3 and v == z) or k==v);
-  i = i+1
-end
-assert(i == 4)
-x,y,z=nil
-collectgarbage()
-assert(next(a) == string.rep('$', 11))
-
-
--- 'bug' in 5.1
-a = {}
-local t = {x = 10}
-local C = setmetatable({key = t}, {__mode = 'v'})
-local C1 = setmetatable({[t] = 1}, {__mode = 'k'})
-a.x = t  -- this should not prevent 't' from being removed from
-         -- weak table 'C' by the time 'a' is finalized
-
-setmetatable(a, {__gc = function (u)
-                          assert(C.key == nil)
-                          assert(type(next(C1)) == 'table')
-                          end})
-
-a, t = nil
-collectgarbage()
-collectgarbage()
-assert(next(C) == nil and next(C1) == nil)
-C, C1 = nil
-
-
--- ephemerons
-local mt = {__mode = 'k'}
-a = {10,20,30,40}; setmetatable(a, mt)
-x = nil
-for i = 1, 100 do local n = {}; a[n] = {k = {x}}; x = n end
-GC()
-local n = x
-local i = 0
-while n do n = a[n].k[1]; i = i + 1 end
-assert(i == 100)
-x = nil
-GC()
-for i = 1, 4 do assert(a[i] == i * 10); a[i] = nil end
-assert(next(a) == nil)
-
-local K = {}
-a[K] = {}
-for i=1,10 do a[K][i] = {}; a[a[K][i]] = setmetatable({}, mt) end
-x = nil
-local k = 1
-for j = 1,100 do
-  local n = {}; local nk = k%10 + 1
-  a[a[K][nk]][n] = {x, k = k}; x = n; k = nk
-end
-GC()
-local n = x
-local i = 0
-while n do local t = a[a[K][k]][n]; n = t[1]; k = t.k; i = i + 1 end
-assert(i == 100)
-K = nil
-GC()
-assert(next(a) == nil)
-
-
--- testing errors during GC
-do
-collectgarbage("stop")   -- stop collection
-local u = {}
-local s = {}; setmetatable(s, {__mode = 'k'})
-setmetatable(u, {__gc = function (o)
-  local i = s[o]
-  s[i] = true
-  assert(not s[i - 1])   -- check proper finalization order
-  if i == 8 then error("here") end   -- error during GC
-end})
-
-for i = 6, 10 do
-  local n = setmetatable({}, getmetatable(u))
-  s[n] = i
-end
-
-assert(not pcall(collectgarbage))
-for i = 8, 10 do assert(s[i]) end
-
-for i = 1, 5 do
-  local n = setmetatable({}, getmetatable(u))
-  s[n] = i
-end
-
-collectgarbage()
-for i = 1, 10 do assert(s[i]) end
-
-getmetatable(u).__gc = false
-
-
--- __gc errors with non-string messages
-setmetatable({}, {__gc = function () error{} end})
-local a, b = pcall(collectgarbage)
-assert(not a and type(b) == "string" and string.find(b, "error in __gc"))
-
-end
-print '+'
-
-
--- testing userdata
-if T==nil then
-  (Message or print)('\a\n >>> testC not active: skipping userdata GC tests <<<\n\a')
-
-else
-
-  local function newproxy(u)
-    return debug.setmetatable(T.newuserdata(0), debug.getmetatable(u))
-  end
-
-  collectgarbage("stop")   -- stop collection
-  local u = newproxy(nil)
-  debug.setmetatable(u, {__gc = true})
-  local s = 0
-  local a = {[u] = 0}; setmetatable(a, {__mode = 'vk'})
-  for i=1,10 do a[newproxy(u)] = i end
-  for k in pairs(a) do assert(getmetatable(k) == getmetatable(u)) end
-  local a1 = {}; for k,v in pairs(a) do a1[k] = v end
-  for k,v in pairs(a1) do a[v] = k end
-  for i =1,10 do assert(a[i]) end
-  getmetatable(u).a = a1
-  getmetatable(u).u = u
-  do
-    local u = u
-    getmetatable(u).__gc = function (o)
-      assert(a[o] == 10-s)
-      assert(a[10-s] == nil) -- udata already removed from weak table
-      assert(getmetatable(o) == getmetatable(u))
-    assert(getmetatable(o).a[o] == 10-s)
-      s=s+1
-    end
-  end
-  a1, u = nil
-  assert(next(a) ~= nil)
-  collectgarbage()
-  assert(s==11)
-  collectgarbage()
-  assert(next(a) == nil)  -- finalized keys are removed in two cycles
-end
-
-
--- __gc x weak tables
-local u = setmetatable({}, {__gc = true})
--- __gc metamethod should be collected before running
-setmetatable(getmetatable(u), {__mode = "v"})
-getmetatable(u).__gc = function (o) os.exit(1) end  -- cannot happen
-u = nil
-collectgarbage()
-
-local u = setmetatable({}, {__gc = true})
-local m = getmetatable(u)
-m.x = {[{0}] = 1; [0] = {1}}; setmetatable(m.x, {__mode = "kv"});
-m.__gc = function (o)
-  assert(next(getmetatable(o).x) == nil)
-  m = 10
-end
-u, m = nil
-collectgarbage()
-assert(m==10)
-
-
--- errors during collection
-u = setmetatable({}, {__gc = function () error "!!!" end})
-u = nil
-assert(not pcall(collectgarbage))
-
-
-if not _soft then
-  print("deep structures")
-  local a = {}
-  for i = 1,200000 do
-    a = {next = a}
-  end
-  collectgarbage()
-end
-
--- create many threads with self-references and open upvalues
-local thread_id = 0
-local threads = {}
-
-local function fn (thread)
-    local x = {}
-    threads[thread_id] = function()
-                             thread = x
-                         end
-    coroutine.yield()
-end
-
-while thread_id < 1000 do
-    local thread = coroutine.create(fn)
-    coroutine.resume(thread, thread)
-    thread_id = thread_id + 1
-end
-
-do
-  collectgarbage()
-  collectgarbage"stop"
-  local x = gcinfo()
-  repeat
-    for i=1,1000 do _ENV.a = {} end
-    collectgarbage("step", 1)   -- steps should not unblock the collector
-  until gcinfo() > 2 * x
-  collectgarbage"restart"
-end
-
-
-if T then   -- tests for weird cases collecting upvalues
-  local a = 1200
-  local f = function () return a end    -- create upvalue for 'a'
-  assert(f() == 1200)
-
-  -- erase reference to upvalue 'a', mark it as dead, but does not collect it
-  T.gcstate("pause"); collectgarbage("stop")
-  f = nil
-  T.gcstate("sweepstring")
-
-  -- this function will reuse that dead upvalue...
-  f = function () return a end
-  assert(f() == 1200)
-
-  -- create coroutine with local variable 'b'
-  local co = coroutine.wrap(function()
-    local b = 150
-    coroutine.yield(function () return b end)
-  end)
-
-  T.gcstate("pause")
-  assert(co()() == 150)  -- create upvalue for 'b'
-
-  -- mark upvalue 'b' as dead, but does not collect it
-  T.gcstate("sweepstring")
-
-  co()   -- finish coroutine, "closing" that dead upvalue
-
-  assert(f() == 1200)
-  collectgarbage("restart")
-
-  print"+"
-end
-
-
-if T then
-  local debug = require "debug"
-  collectgarbage("generational"); collectgarbage("stop")
-  x = T.newuserdata(0)
-  T.gcstate("propagate")    -- ensure 'x' is old
-  T.gcstate("sweepstring")
-  T.gcstate("propagate")
-  assert(string.find(T.gccolor(x), "/old"))
-  local y = T.newuserdata(0)
-  debug.setmetatable(y, {__gc = true})   -- bless the new udata before...
-  debug.setmetatable(x, {__gc = true})   -- ...the old one
-  assert(string.find(T.gccolor(y), "white"))
-  T.checkmemory()
-  collectgarbage("incremental"); collectgarbage("restart")
-end
-
-
-if T then
-  print("emergency collections")
-  collectgarbage()
-  collectgarbage()
-  T.totalmem(T.totalmem() + 200)
-  for i=1,200 do local a = {} end
-  T.totalmem(1000000000)
-  collectgarbage()
-  local t = T.totalmem("table")
-  local a = {{}, {}, {}}   -- create 4 new tables
-  assert(T.totalmem("table") == t + 4)
-  t = T.totalmem("function")
-  a = function () end   -- create 1 new closure
-  assert(T.totalmem("function") == t + 1)
-  t = T.totalmem("thread")
-  a = coroutine.create(function () end)   -- create 1 new coroutine
-  assert(T.totalmem("thread") == t + 1)
-end
-
--- create an object to be collected when state is closed
-do
-  local setmetatable,assert,type,print,getmetatable =
-        setmetatable,assert,type,print,getmetatable
-  local tt = {}
-  tt.__gc = function (o)
-    assert(getmetatable(o) == tt)
-    -- create new objects during GC
-    local a = 'xuxu'..(10+3)..'joao', {}
-    ___Glob = o  -- ressurect object!
-    setmetatable({}, tt)  -- creates a new one with same metatable
-    print(">>> closing state " .. "<<<\n")
-  end
-  local u = setmetatable({}, tt)
-  ___Glob = {u}   -- avoid object being collected before program end
-end
-
--- create several objects to raise errors when collected while closing state
-do
-  local mt = {__gc = function (o) return o + 1 end}
-  for i = 1,10 do
-    -- create object and preserve it until the end
-    table.insert(___Glob, setmetatable({}, mt))
-  end
-end
-
--- just to make sure
-assert(collectgarbage'isrunning')
-
-print('OK')
diff --git a/lua-5.2.2-tests/goto.lua b/lua-5.2.2-tests/goto.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/goto.lua
+++ /dev/null
@@ -1,173 +0,0 @@
-local function errmsg (code, m)
-  local st, msg = load(code)
-  assert(not st and string.find(msg, m))
-end
-
--- cannot see label inside block
-errmsg([[ goto l1; do ::l1:: end ]], "label 'l1'")
-errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
-
--- repeated label
-errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
-
-
--- undefined label
-errmsg([[ goto l1; local aa ::l1:: ::l2:: print(3) ]], "local 'aa'")
-
--- jumping over variable definition
-errmsg([[
-do local bb, cc; goto l1; end
-local aa
-::l1:: print(3)
-]], "local 'aa'")
-
--- jumping into a block
-errmsg([[ do ::l1:: end goto l1 ]], "label 'l1'")
-errmsg([[ goto l1 do ::l1:: end ]], "label 'l1'")
-
--- cannot continue a repeat-until with variables
-errmsg([[
-  repeat
-    if x then goto cont end
-    local xuxu = 10
-    ::cont::
-  until xuxu < x
-]], "local 'xuxu'")
-
--- simple gotos
-local x
-do
-  local y = 12
-  goto l1
-  ::l2:: x = x + 1; goto l3
-  ::l1:: x = y; goto l2
-end
-::l3:: ::l3_1:: assert(x == 13)
-
-
--- long labels
-do
-  local prog = [[
-  do
-    local a = 1
-    goto l%sa; a = a + 1
-   ::l%sa:: a = a + 10
-    goto l%sb; a = a + 2
-   ::l%sb:: a = a + 20
-    return a
-  end
-  ]]
-  local label = string.rep("0123456789", 40)
-  prog = string.format(prog, label, label, label, label)
-  assert(assert(load(prog))() == 31)
-end
-
--- goto to correct label when nested
-do goto l3; ::l3:: end   -- does not loop jumping to previous label 'l3'
-
--- ok to jump over local dec. to end of block
-do
-  goto l1
-  local a = 23
-  x = a
-  ::l1::;
-end
-
-while true do
-  goto l4
-  goto l1  -- ok to jump over local dec. to end of block
-  goto l1  -- multiple uses of same label
-  local x = 45
-  ::l1:: ;;;
-end
-::l4:: assert(x == 13)
-
-if print then
-  goto l1   -- ok to jump over local dec. to end of block
-  error("should not be here")
-  goto l2   -- ok to jump over local dec. to end of block
-  local x
-  ::l1:: ; ::l2:: ;;
-else end
-
--- to repeat a label in a different function is OK
-local function foo ()
-  local a = {}
-  goto l3
-  ::l1:: a[#a + 1] = 1; goto l2;
-  ::l2:: a[#a + 1] = 2; goto l5;
-  ::l3::
-  ::l3a:: a[#a + 1] = 3; goto l1;
-  ::l4:: a[#a + 1] = 4; goto l6;
-  ::l5:: a[#a + 1] = 5; goto l4;
-  ::l6:: assert(a[1] == 3 and a[2] == 1 and a[3] == 2 and
-              a[4] == 5 and a[5] == 4)
-  if not a[6] then a[6] = true; goto l3a end   -- do it twice
-end
-
-::l6:: foo()
-
-
-
---------------------------------------------------------------------------------
--- testing closing of upvalues
-
-local function foo ()
-  local a = {}
-  do
-  local i = 1
-  local k = 0
-  a[0] = function (y) k = y end
-  ::l1:: do
-    local x
-    if i > 2 then goto l2 end
-    a[i] = function (y) if y then x = y else return x + k end end
-    i = i + 1
-    goto l1
-  end
-  end
-  ::l2:: return a
-end
-
-local a = foo()
-a[1](10); a[2](20)
-assert(a[1]() == 10 and a[2]() == 20 and a[3] == nil)
-a[0](13)
-assert(a[1]() == 23 and a[2]() == 33)
-
---------------------------------------------------------------------------------
--- testing if x goto optimizations
-
-local function testG (a)
-  if a == 1 then
-    goto l1
-    error("should never be here!")
-  elseif a == 2 then goto l2
-  elseif a == 3 then goto l3
-  elseif a == 4 then
-    goto l1  -- go to inside the block
-    error("should never be here!")
-    ::l1:: a = a + 1   -- must go to 'if' end
-  else
-    goto l4
-    ::l4a:: a = a * 2; goto l4b
-    error("should never be here!")
-    ::l4:: goto l4a
-    error("should never be here!")
-    ::l4b::
-  end
-  do return a end
-  ::l2:: do return "2" end
-  ::l3:: do return "3" end
-  ::l1:: return "1"
-end
-
-assert(testG(1) == "1")
-assert(testG(2) == "2")
-assert(testG(3) == "3")
-assert(testG(4) == 5)
-assert(testG(5) == 10)
---------------------------------------------------------------------------------
-
-
-print'OK'
diff --git a/lua-5.2.2-tests/literals.lua b/lua-5.2.2-tests/literals.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/literals.lua
+++ /dev/null
@@ -1,258 +0,0 @@
-print('testing scanner')
-
-debug = require "debug"
-
-
-local function dostring (x) return assert(load(x))() end
-
-dostring("x \v\f = \t\r 'a\0a' \v\f\f")
-assert(x == 'a\0a' and string.len(x) == 3)
-
--- escape sequences
-assert('\n\"\'\\' == [[
-
-"'\]])
-
-assert(string.find("\a\b\f\n\r\t\v", "^%c%c%c%c%c%c%c$"))
-
--- assume ASCII just for tests:
-assert("\09912" == 'c12')
-assert("\99ab" == 'cab')
-assert("\099" == '\99')
-assert("\099\n" == 'c\10')
-assert('\0\0\0alo' == '\0' .. '\0\0' .. 'alo')
-
-assert(010 .. 020 .. -030 == "1020-30")
-
--- hexadecimal escapes
-assert("\x00\x05\x10\x1f\x3C\xfF\xe8" == "\0\5\16\31\60\255\232")
-
-local function lexstring (x, y, n)
-  local f = assert(load('return '..x..', debug.getinfo(1).currentline'))
-  local s, l = f()
-  assert(s == y and l == n)
-end
-
-lexstring("'abc\\z  \n   efg'", "abcefg", 2)
-lexstring("'abc\\z  \n\n\n'", "abc", 4)
-lexstring("'\\z  \n\t\f\v\n'",  "", 3)
-lexstring("[[\nalo\nalo\n\n]]", "alo\nalo\n\n", 5)
-lexstring("[[\nalo\ralo\n\n]]", "alo\nalo\n\n", 5)
-lexstring("[[\nalo\ralo\r\n]]", "alo\nalo\n", 4)
-lexstring("[[\ralo\n\ralo\r\n]]", "alo\nalo\n", 4)
-lexstring("[[alo]\n]alo]]", "alo]\n]alo", 2)
-
-assert("abc\z
-        def\z
-        ghi\z
-       " == 'abcdefghi')
-
--- Error in escape sequences
-local function lexerror (s, err)
-  local st, msg = load('return '..s)
-  if err ~= '<eof>' then err = "'"..err.."'" end
-  assert(not st and string.find(msg, "near "..err, 1, true))
-end
-lexerror([["abc\x"]], [[\x"]])
-lexerror([["abc\x]], [[\x]])
-lexerror([["\x]], [[\x]])
-lexerror([["\x5"]], [[\x5"]])
-lexerror([["\x5]], [[\x5]])
-lexerror([["\xr"]], [[\xr]])
-lexerror([["\xr]], [[\xr]])
-lexerror([["\x.]], [[\x.]])
-lexerror([["\x8%"]], [[\x8%]])
-lexerror([["\xAG]], [[\xAG]])
-lexerror([["\g"]], [[\g]])
-lexerror([["\g]], [[\g]])
-lexerror([["\."]], [[\.]])
-
-lexerror([["\999"]], [[\999]])
-lexerror([["xyz\300"]], [[\300]])
-lexerror([["   \256"]], [[\256]])
-
-
--- unfinished strings
-lexerror("[=[alo]]", "<eof>")
-lexerror("[=[alo]=", "<eof>")
-lexerror("[=[alo]", "<eof>")
-lexerror("'alo", "<eof>")
-lexerror("'alo \\z  \n\n", "<eof>")
-lexerror("'alo \\z", "<eof>")
-lexerror([['alo \98]], "<eof>")
-
--- valid characters in variable names
-for i = 0, 255 do
-  local s = string.char(i)
-  assert(not string.find(s, "[a-zA-Z_]") == not load(s .. "=1"))
-  assert(not string.find(s, "[a-zA-Z_0-9]") ==
-         not load("a" .. s .. "1 = 1"))
-end
-
-
--- long variable names
-
-var = string.rep('a', 15000)
-prog = string.format("%s = 5", var)
-dostring(prog)
-assert(_G[var] == 5)
-var = nil
-print('+')
-
--- escapes --
-assert("\n\t" == [[
-
-	]])
-assert([[
-
- $debug]] == "\n $debug")
-assert([[ [ ]] ~= [[ ] ]])
--- long strings --
-b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
-assert(string.len(b) == 960)
-prog = [=[
-print('+')
-
-a1 = [["isto e' um string com várias 'aspas'"]]
-a2 = "'aspas'"
-
-assert(string.find(a1, a2) == 31)
-print('+')
-
-a1 = [==[temp = [[um valor qualquer]]; ]==]
-assert(load(a1))()
-assert(temp == 'um valor qualquer')
--- long strings --
-b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
-assert(string.len(b) == 960)
-print('+')
-
-a = [[00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-00123456789012345678901234567890123456789123456789012345678901234567890123456789
-]]
-assert(string.len(a) == 1863)
-assert(string.sub(a, 1, 40) == string.sub(b, 1, 40))
-x = 1
-]=]
-
-print('+')
-x = nil
-dostring(prog)
-assert(x)
-
-prog = nil
-a = nil
-b = nil
-
-
--- testing line ends
-prog = [[
-a = 1        -- a comment
-b = 2
-
-
-x = [=[
-hi
-]=]
-y = "\
-hello\r\n\
-"
-return debug.getinfo(1).currentline
-]]
-
-for _, n in pairs{"\n", "\r", "\n\r", "\r\n"} do
-  local prog, nn = string.gsub(prog, "\n", n)
-  assert(dostring(prog) == nn)
-  assert(_G.x == "hi\n" and _G.y == "\nhello\r\n\n")
-end
-
-
--- testing comments and strings with long brackets
-a = [==[]=]==]
-assert(a == "]=")
-
-a = [==[[===[[=[]]=][====[]]===]===]==]
-assert(a == "[===[[=[]]=][====[]]===]===")
-
-a = [====[[===[[=[]]=][====[]]===]===]====]
-assert(a == "[===[[=[]]=][====[]]===]===")
-
-a = [=[]]]]]]]]]=]
-assert(a == "]]]]]]]]")
-
-
---[===[
-x y z [==[ blu foo
-]==
-]
-]=]==]
-error error]=]===]
-
--- generate all strings of four of these chars
-local x = {"=", "[", "]", "\n"}
-local len = 4
-local function gen (c, n)
-  if n==0 then coroutine.yield(c)
-  else
-    for _, a in pairs(x) do
-      gen(c..a, n-1)
-    end
-  end
-end
-
-for s in coroutine.wrap(function () gen("", len) end) do
-  assert(s == load("return [====[\n"..s.."]====]")())
-end
-
-
--- testing decimal point locale
-if os.setlocale("pt_BR") or os.setlocale("ptb") then
-  assert(not load("á = 3"))  -- parser still works with C locale
-  assert(not load("a = (3,4)"))
-  assert(tonumber("3,4") == 3.4 and tonumber"3.4" == nil)
-  assert(assert(load("return 3.4"))() == 3.4)
-  assert(assert(load("return .4,3"))() == .4)
-  assert(assert(load("return 4."))() == 4.)
-  assert(assert(load("return 4.+.5"))() == 4.5)
-  local a,b = load("return 4.5.")
-  assert(string.find(b, "'4%.5%.'"))
-  assert(os.setlocale("C"))
-else
-  (Message or print)(
-   '\a\n >>> pt_BR locale not available: skipping decimal point tests <<<\n\a')
-end
-
-
--- testing %q x line ends
-local s = "a string with \r and \n and \r\n and \n\r"
-local c = string.format("return %q", s)
-assert(assert(load(c))() == s)
-
--- testing errors
-assert(not load"a = 'non-ending string")
-assert(not load"a = 'non-ending string\n'")
-assert(not load"a = '\\345'")
-assert(not load"a = [=x]")
-
-print('OK')
diff --git a/lua-5.2.2-tests/locals.lua b/lua-5.2.2-tests/locals.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/locals.lua
+++ /dev/null
@@ -1,157 +0,0 @@
-print('testing local variables and environments')
-
-local debug = require"debug"
-
-
--- bug in 5.1:
-
-local function f(x) x = nil; return x end
-assert(f(10) == nil)
-
-local function f() local x; return x end
-assert(f(10) == nil)
-
-local function f(x) x = nil; local y; return x, y end
-assert(f(10) == nil and select(2, f(20)) == nil)
-
-do
-  local i = 10
-  do local i = 100; assert(i==100) end
-  do local i = 1000; assert(i==1000) end
-  assert(i == 10)
-  if i ~= 10 then
-    local i = 20
-  else
-    local i = 30
-    assert(i == 30)
-  end
-end
-
-
-
-f = nil
-
-local f
-x = 1
-
-a = nil
-load('local a = {}')()
-assert(a == nil)
-
-function f (a)
-  local _1, _2, _3, _4, _5
-  local _6, _7, _8, _9, _10
-  local x = 3
-  local b = a
-  local c,d = a,b
-  if (d == b) then
-    local x = 'q'
-    x = b
-    assert(x == 2)
-  else
-    assert(nil)
-  end
-  assert(x == 3)
-  local f = 10
-end
-
-local b=10
-local a; repeat local b; a,b=1,2; assert(a+1==b); until a+b==3
-
-
-assert(x == 1)
-
-f(2)
-assert(type(f) == 'function')
-
-
-local function getenv (f)
-  local a,b = debug.getupvalue(f, 1)
-  assert(a == '_ENV')
-  return b
-end
-
--- test for global table of loaded chunks
-assert(getenv(load"a=3") == _G)
-local c = {}; local f = load("a = 3", nil, nil, c)
-assert(getenv(f) == c)
-assert(c.a == nil)
-f()
-assert(c.a == 3)
-
--- testing limits for special instructions
-
-if not _soft then
-  local a
-  local p = 4
-  for i=2,31 do
-    for j=-3,3 do
-      assert(load(string.format([[local a=%s;
-                                        a=a+%s;
-                                        assert(a ==2^%s)]], j, p-j, i))) ()
-      assert(load(string.format([[local a=%s;
-                                        a=a-%s;
-                                        assert(a==-2^%s)]], -j, p-j, i))) ()
-      assert(load(string.format([[local a,b=0,%s;
-                                        a=b-%s;
-                                        assert(a==-2^%s)]], -j, p-j, i))) ()
-    end
-    p =2*p
-  end
-end
-
-print'+'
-
-
-if rawget(_G, "querytab") then
-  -- testing clearing of dead elements from tables
-  collectgarbage("stop")   -- stop GC
-  local a = {[{}] = 4, [3] = 0, alo = 1, 
-             a1234567890123456789012345678901234567890 = 10}
-
-  local t = querytab(a)
-
-  for k,_ in pairs(a) do a[k] = nil end
-  collectgarbage()   -- restore GC and collect dead fiels in `a'
-  for i=0,t-1 do
-    local k = querytab(a, i)
-    assert(k == nil or type(k) == 'number' or k == 'alo')
-  end
-end
-
-
--- testing lexical environments
-
-assert(_ENV == _G)
-
-do local _ENV = (function (...) return ... end)(_G, dummy)
-
-do local _ENV = {assert=assert}; assert(true) end
-mt = {_G = _G}
-local foo,x
-do local _ENV = mt
-  function foo (x)
-    A = x
-    do local _ENV =  _G; A = 1000 end
-    return function (x) return A .. x end
-  end
-end
-assert(getenv(foo) == mt)
-x = foo('hi'); assert(mt.A == 'hi' and A == 1000)
-assert(x('*') == mt.A .. '*')
-
-do local _ENV = {assert=assert, A=10};
-  do local _ENV = {assert=assert, A=20};
-    assert(A==20);x=A
-  end
-  assert(A==10 and x==20)
-end
-assert(x==20)
-
-
-print('OK')
-
-return 5,f
-
-end
-
diff --git a/lua-5.2.2-tests/main.lua b/lua-5.2.2-tests/main.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/main.lua
+++ /dev/null
@@ -1,258 +0,0 @@
--- most (all?) tests here assume a reasonable "Unix-like" shell
-if _port then return end
-
-print ("testing lua.c options")
-
-assert(os.execute())   -- machine has a system command
-
-prog = os.tmpname()
-otherprog = os.tmpname()
-out = os.tmpname()
-
-do
-  local i = 0
-  while arg[i] do i=i-1 end
-  progname = arg[i+1]
-end
-print("progname: "..progname)
-
-local prepfile = function (s, p)
-  p = p or prog
-  io.output(p)
-  io.write(s)
-  assert(io.close())
-end
-
-function getoutput ()
-  io.input(out)
-  local t = io.read("*a")
-  io.input():close()
-  assert(os.remove(out))
-  return t
-end
-
-function checkprogout (s)
-  local t = getoutput()
-  for line in string.gmatch(s, ".-\n") do
-    assert(string.find(t, line, 1, true))
-  end
-end
-
-function checkout (s)
-  local t = getoutput()
-  if s ~= t then print(string.format("'%s' - '%s'\n", s, t)) end
-  assert(s == t)
-  return t
-end
-
-function auxrun (...)
-  local s = string.format(...)
-  s = string.gsub(s, "lua", '"'..progname..'"', 1)
-  return os.execute(s)
-end
-
-function RUN (...)
-  assert(auxrun(...))
-end
-
-function NoRun (...)
-  assert(not auxrun(...))
-end
-
-function NoRunMsg (...)
-  print("\n(the next error is expected by the test)")
-  return NoRun(...)
-end
-
--- test environment variables used by Lua
-prepfile("print(package.path)")
-
-RUN("env LUA_INIT= LUA_PATH=x lua %s > %s", prog, out)
-checkout("x\n")
-
-RUN("env LUA_INIT= LUA_PATH_5_2=y LUA_PATH=x lua %s > %s", prog, out)
-checkout("y\n")
-
-prepfile("print(package.cpath)")
-
-RUN("env LUA_INIT= LUA_CPATH=xuxu lua %s > %s", prog, out)
-checkout("xuxu\n")
-
-RUN("env LUA_INIT= LUA_CPATH_5_2=yacc LUA_CPATH=x lua %s > %s", prog, out)
-checkout("yacc\n")
-
-prepfile("print(X)")
-RUN('env LUA_INIT="X=3" lua %s > %s', prog, out)
-checkout("3\n")
-
-prepfile("print(X)")
-RUN('env LUA_INIT_5_2="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
-checkout("10\n")
-
--- test option '-E'
-prepfile("print(package.path, package.cpath)")
-RUN('env LUA_INIT="error(10)" LUA_PATH=xxx LUA_CPATH=xxx lua -E %s > %s',
-     prog, out)
-local defaultpath = getoutput()
-defaultpath = string.match(defaultpath, "^(.-)\t")   -- remove tab
-assert(not string.find(defaultpath, "xxx") and string.find(defaultpath, "lua"))
-
-
--- test replacement of ';;' to default path
-local function convert (p)
-  prepfile("print(package.path)")
-  RUN('env LUA_PATH="%s" lua %s > %s', p, prog, out)
-  local expected = getoutput()
-  expected = string.sub(expected, 1, -2)   -- cut final end of line
-  assert(string.gsub(p, ";;", ";"..defaultpath..";") == expected)
-end
-
-convert(";")
-convert(";;")
-convert(";;;")
-convert(";;;;")
-convert(";;;;;")
-convert(";;a;;;bc")
-
-
--- test 2 files
-prepfile("print(1); a=2; return {x=15}")
-prepfile(("print(a); print(_G['%s'].x)"):format(prog), otherprog)
-RUN('env LUA_PATH="?;;" lua -l %s -l%s -lstring -l io %s > %s', prog, otherprog, otherprog, out)
-checkout("1\n2\n15\n2\n15\n")
-
-local a = [[
-  assert(#arg == 3 and arg[1] == 'a' and
-         arg[2] == 'b' and arg[3] == 'c')
-  assert(arg[-1] == '--' and arg[-2] == "-e " and arg[-3] == '%s')
-  assert(arg[4] == nil and arg[-4] == nil)
-  local a, b, c = ...
-  assert(... == 'a' and a == 'a' and b == 'b' and c == 'c')
-]]
-a = string.format(a, progname)
-prepfile(a)
-RUN('lua "-e " -- %s a b c', prog)
-
-prepfile"assert(arg==nil)"
-prepfile("assert(arg)", otherprog)
-RUN('env LUA_PATH="?;;" lua -l%s - < %s', prog, otherprog)
-
-prepfile""
-RUN("lua - < %s > %s", prog, out)
-checkout("")
-
--- test many arguments
-prepfile[[print(({...})[30])]]
-RUN("lua %s %s > %s", prog, string.rep(" a", 30), out)
-checkout("a\n")
-
-RUN([[lua "-eprint(1)" -ea=3 -e "print(a)" > %s]], out)
-checkout("1\n3\n")
-
-prepfile[[
-  print(
-1, a
-)
-]]
-RUN("lua - < %s > %s", prog, out)
-checkout("1\tnil\n")
-
-prepfile[[
-= (6*2-6) -- ===
-a 
-= 10
-print(a)
-= a]]
-RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
-checkprogout("6\n10\n10\n\n")
-
-prepfile("a = [[b\nc\nd\ne]]\n=a")
-print("temporary program file: "..prog)
-RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
-checkprogout("b\nc\nd\ne\n\n")
-
-prompt = "alo"
-prepfile[[ --
-a = 2
-]]
-RUN([[lua "-e_PROMPT='%s'" -i < %s > %s]], prompt, prog, out)
-local t = getoutput()
-assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
-
--- test for error objects
-prepfile[[
-debug = require "debug"
-m = {x=0}
-setmetatable(m, {__tostring = function(x)
-  return debug.getinfo(4).currentline + x.x
-end})
-error(m)
-]]
-NoRun([[lua %s 2> %s]], prog, out)   -- no message
-checkout(progname..": 6\n")
-
-
-s = [=[ -- 
-function f ( x ) 
-  local a = [[
-xuxu
-]]
-  local b = "\
-xuxu\n"
-  if x == 11 then return 1 , 2 end  --[[ test multiple returns ]]
-  return x + 1 
-  --\\
-end
-=( f( 10 ) )
-assert( a == b )
-=f( 11 )  ]=]
-s = string.gsub(s, ' ', '\n\n')
-prepfile(s)
-RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
-checkprogout("11\n1\t2\n\n")
-  
-prepfile[[#comment in 1st line without \n at the end]]
-RUN("lua %s", prog)
-  
-prepfile[[#test line number when file starts with comment line
-debug = require"debug"
-print(debug.getinfo(1).currentline)
-]]
-RUN("lua %s > %s", prog, out)
-checkprogout('3')
-
--- close Lua with an open file
-prepfile(string.format([[io.output(%q); io.write('alo')]], out))
-RUN("lua %s", prog)
-checkout('alo')
-
--- bug in 5.2 beta (extra \0 after version line)
-RUN([[lua -v  -e'print"hello"' > %s]], out)
-t = getoutput()
-assert(string.find(t, "PUC%-Rio\nhello"))
-
-
--- testing os.exit
-prepfile("os.exit(nil, true)")
-RUN("lua %s", prog)
-prepfile("os.exit(0, true)")
-RUN("lua %s", prog)
-prepfile("os.exit(true, true)")
-RUN("lua %s", prog)
-prepfile("os.exit(1, true)")
-NoRun("lua %s", prog)   -- no message
-prepfile("os.exit(false, true)")
-NoRun("lua %s", prog)   -- no message
-
-assert(os.remove(prog))
-assert(os.remove(otherprog))
-assert(not os.remove(out))
-
-RUN("lua -v")
-
-NoRunMsg("lua -h")
-NoRunMsg("lua -e")
-NoRunMsg("lua -e a")
-NoRunMsg("lua -f")
-
-print("OK")
diff --git a/lua-5.2.2-tests/math.lua b/lua-5.2.2-tests/math.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/math.lua
+++ /dev/null
@@ -1,288 +0,0 @@
-print("testing numbers and math lib")
-
-
--- basic float notation
-assert(0e12 == 0 and .0 == 0 and 0. == 0 and .2e2 == 20 and 2.E-1 == 0.2)
-
-do
-  local a,b,c = "2", " 3e0 ", " 10  "
-  assert(a+b == 5 and -b == -3 and b+"2" == 5 and "10"-c == 0)
-  assert(type(a) == 'string' and type(b) == 'string' and type(c) == 'string')
-  assert(a == "2" and b == " 3e0 " and c == " 10  " and -c == -"  10 ")
-  assert(c%a == 0 and a^b == 08)
-  a = 0
-  assert(a == -a and 0 == -0)
-end
-
-do
-  local x = -1
-  local mz = 0/x   -- minus zero
-  t = {[0] = 10, 20, 30, 40, 50}
-  assert(t[mz] == t[0] and t[-0] == t[0])
-end
-
-do
-  local a,b = math.modf(3.5)
-  assert(a == 3 and b == 0.5)
-  assert(math.huge > 10e30)
-  assert(-math.huge < -10e30)
-end
-
-function f(...)
-  if select('#', ...) == 1 then
-    return (...)
-  else
-    return "***"
-  end
-end
-
-
--- testing numeric strings
-
-assert("2" + 1 == 3)
-assert("2 " + 1 == 3)
-assert(" -2 " + 1 == -1)
-assert(" -0xa " + 1 == -9)
-
-
--- testing 'tonumber'
-assert(tonumber{} == nil)
-assert(tonumber'+0.01' == 1/100 and tonumber'+.01' == 0.01 and
-       tonumber'.01' == 0.01    and tonumber'-1.' == -1 and
-       tonumber'+1.' == 1)
-assert(tonumber'+ 0.01' == nil and tonumber'+.e1' == nil and
-       tonumber'1e' == nil     and tonumber'1.0e+' == nil and
-       tonumber'.' == nil)
-assert(tonumber('-012') == -010-2)
--- Commenting this line out for now, see issue #2
--- assert(tonumber('-1.2e2') == - - -120)
-
-assert(tonumber("0xffffffffffff") == 2^(4*12) - 1)
-assert(tonumber("0x"..string.rep("f", 150)) == 2^(4*150) - 1)
-assert(tonumber('0x3.' .. string.rep('0', 100)) == 3)
-assert(tonumber('0x0.' .. string.rep('0', 150).."1") == 2^(-4*151))
-
--- testing 'tonumber' with base
-assert(tonumber('  001010  ', 2) == 10)
-assert(tonumber('  001010  ', 10) == 001010)
-assert(tonumber('  -1010  ', 2) == -10)
-assert(tonumber('10', 36) == 36)
-assert(tonumber('  -10  ', 36) == -36)
-assert(tonumber('  +1Z  ', 36) == 36 + 35)
-assert(tonumber('  -1z  ', 36) == -36 + -35)
-assert(tonumber('-fFfa', 16) == -(10+(16*(15+(16*(15+(16*15)))))))
-assert(tonumber(string.rep('1', 42), 2) + 1 == 2^42)
-assert(tonumber(string.rep('1', 34), 2) + 1 == 2^34)
-assert(tonumber('ffffFFFF', 16)+1 == 2^32)
-assert(tonumber('0ffffFFFF', 16)+1 == 2^32)
-assert(tonumber('-0ffffffFFFF', 16) - 1 == -2^40)
-for i = 2,36 do
-  assert(tonumber('\t10000000000\t', i) == i^10)
-end
-
--- testing 'tonumber' fo invalid formats
-assert(f(tonumber('fFfa', 15)) == nil)
-assert(f(tonumber('099', 8)) == nil)
-assert(f(tonumber('1\0', 2)) == nil)
-assert(f(tonumber('', 8)) == nil)
-assert(f(tonumber('  ', 9)) == nil)
-assert(f(tonumber('  ', 9)) == nil)
-assert(f(tonumber('0xf', 10)) == nil)
-
-assert(f(tonumber('inf')) == nil)
-assert(f(tonumber(' INF ')) == nil)
-assert(f(tonumber('Nan')) == nil)
-assert(f(tonumber('nan')) == nil)
-
-assert(f(tonumber('  ')) == nil)
-assert(f(tonumber('')) == nil)
-assert(f(tonumber('1  a')) == nil)
-assert(f(tonumber('1\0')) == nil)
-assert(f(tonumber('1 \0')) == nil)
-assert(f(tonumber('1\0 ')) == nil)
-assert(f(tonumber('e1')) == nil)
-assert(f(tonumber('e  1')) == nil)
-assert(f(tonumber(' 3.4.5 ')) == nil)
-
-
--- testing 'tonumber' for invalid hexadecimal formats
-
-assert(tonumber('0x') == nil)
-assert(tonumber('x') == nil)
-assert(tonumber('x3') == nil)
-assert(tonumber('00x2') == nil)
-assert(tonumber('0x 2') == nil)
-assert(tonumber('0 x2') == nil)
-assert(tonumber('23x') == nil)
-assert(tonumber('- 0xaa') == nil)
-
-
--- testing hexadecimal numerals
-
-assert(0x10 == 16 and 0xfff == 2^12 - 1 and 0XFB == 251)
-assert(0x0p12 == 0 and 0x.0p-3 == 0)
-assert(0xFFFFFFFF == 2^32 - 1)
-assert(tonumber('+0x2') == 2)
-assert(tonumber('-0xaA') == -170)
-assert(tonumber('-0xffFFFfff') == -2^32 + 1)
-
--- possible confusion with decimal exponent
-assert(0E+1 == 0 and 0xE+1 == 15 and 0xe-1 == 13)
-
-
--- floating hexas
-
-assert(tonumber('  0x2.5  ') == 0x25/16)
-assert(tonumber('  -0x2.5  ') == -0x25/16)
-assert(tonumber('  +0x0.51p+8  ') == 0x51)
-assert(tonumber('0x0.51p') == nil)
-assert(tonumber('0x5p+-2') == nil)
-assert(0x.FfffFFFF == 1 - '0x.00000001')
-assert('0xA.a' + 0 == 10 + 10/16)
-assert(0xa.aP4 == 0XAA)
-assert(0x4P-2 == 1)
-assert(0x1.1 == '0x1.' + '+0x.1')
-
-
-assert(1.1 == 1.+.1)
-assert(100.0 == 1E2 and .01 == 1e-2)
-assert(1111111111111111-1111111111111110== 1000.00e-03)
---     1234567890123456
-assert(1.1 == '1.'+'.1')
-assert('1111111111111111'-'1111111111111110' == tonumber"  +0.001e+3 \n\t")
-
-function eq (a,b,limit)
-  if not limit then limit = 10E-10 end
-  return math.abs(a-b) <= limit
-end
-
-assert(0.1e-30 > 0.9E-31 and 0.9E30 < 0.1e31)
-
-assert(0.123456 > 0.123455)
-
-assert(tonumber('+1.23E18') == 1.23*10^18)
-
--- testing order operators
-assert(not(1<1) and (1<2) and not(2<1))
-assert(not('a'<'a') and ('a'<'b') and not('b'<'a'))
-assert((1<=1) and (1<=2) and not(2<=1))
-assert(('a'<='a') and ('a'<='b') and not('b'<='a'))
-assert(not(1>1) and not(1>2) and (2>1))
-assert(not('a'>'a') and not('a'>'b') and ('b'>'a'))
-assert((1>=1) and not(1>=2) and (2>=1))
-assert(('a'>='a') and not('a'>='b') and ('b'>='a'))
-
--- testing mod operator
-assert(-4%3 == 2)
-assert(4%-3 == -2)
-assert(math.pi - math.pi % 1 == 3)
-assert(math.pi - math.pi % 0.001 == 3.141)
-
-local function testbit(a, n)
-  return a/2^n % 2 >= 1
-end
-
-assert(eq(math.sin(-9.8)^2 + math.cos(-9.8)^2, 1))
-assert(eq(math.tan(math.pi/4), 1))
-assert(eq(math.sin(math.pi/2), 1) and eq(math.cos(math.pi/2), 0))
-assert(eq(math.atan(1), math.pi/4) and eq(math.acos(0), math.pi/2) and
-       eq(math.asin(1), math.pi/2))
-assert(eq(math.deg(math.pi/2), 90) and eq(math.rad(90), math.pi/2))
-assert(math.abs(-10) == 10)
-assert(eq(math.atan2(1,0), math.pi/2))
-assert(math.ceil(4.5) == 5.0)
-assert(math.floor(4.5) == 4.0)
-assert(math.fmod(10,3) == 1)
-assert(eq(math.sqrt(10)^2, 10))
-assert(eq(math.log(2, 10), math.log(2)/math.log(10)))
-assert(eq(math.log(2, 2), 1))
-assert(eq(math.log(9, 3), 2))
-assert(eq(math.exp(0), 1))
-assert(eq(math.sin(10), math.sin(10%(2*math.pi))))
-local v,e = math.frexp(math.pi)
-assert(eq(math.ldexp(v,e), math.pi))
-
-assert(eq(math.tanh(3.5), math.sinh(3.5)/math.cosh(3.5)))
-
-assert(tonumber(' 1.3e-2 ') == 1.3e-2)
-assert(tonumber(' -1.00000000000001 ') == -1.00000000000001)
-
--- testing constant limits
--- 2^23 = 8388608
-assert(8388609 + -8388609 == 0)
-assert(8388608 + -8388608 == 0)
-assert(8388607 + -8388607 == 0)
-
--- testing implicit convertions
-
-local a,b = '10', '20'
-assert(a*b == 200 and a+b == 30 and a-b == -10 and a/b == 0.5 and -b == -20)
-assert(a == '10' and b == '20')
-
-
-if not _port then
-  print("testing -0 and NaN")
-  local mz, z = -0, 0
-  assert(mz == z)
-  assert(1/mz < 0 and 0 < 1/z)
-  local a = {[mz] = 1}
-  assert(a[z] == 1 and a[mz] == 1)
-  local inf = math.huge * 2 + 1
-  mz, z = -1/inf, 1/inf
-  assert(mz == z)
-  assert(1/mz < 0 and 0 < 1/z)
-  local NaN = inf - inf
-  assert(NaN ~= NaN)
-  assert(not (NaN < NaN))
-  assert(not (NaN <= NaN))
-  assert(not (NaN > NaN))
-  assert(not (NaN >= NaN))
-  assert(not (0 < NaN) and not (NaN < 0))
-  local NaN1 = 0/0
-  assert(NaN ~= NaN1 and not (NaN <= NaN1) and not (NaN1 <= NaN))
-  local a = {}
-  assert(not pcall(function () a[NaN] = 1 end))
-  assert(a[NaN] == nil)
-  a[1] = 1
-  assert(not pcall(function () a[NaN] = 1 end))
-  assert(a[NaN] == nil)
-  -- string with same binary representation as 0.0 (may create problems
-  -- for constant manipulation in the pre-compiler)
-  local a1, a2, a3, a4, a5 = 0, 0, "\0\0\0\0\0\0\0\0", 0, "\0\0\0\0\0\0\0\0"
-  assert(a1 == a2 and a2 == a4 and a1 ~= a3)
-  assert(a3 == a5)
-end
-
-
-if not _port then
-  print("testing 'math.random'")
-  math.randomseed(0)
-
-  local function aux (x1, x2, p)
-    local Max = -math.huge
-    local Min = math.huge
-    for i = 0, 20000 do
-      local t = math.random(table.unpack(p))
-      Max = math.max(Max, t)
-      Min = math.min(Min, t)
-      if eq(Max, x2, 0.001) and eq(Min, x1, 0.001) then
-        goto ok
-      end
-    end
-    -- loop ended without satisfing condition
-    assert(false)
-   ::ok::
-    assert(x1 <= Min and Max<=x2)
-  end
-
-  aux(0, 1, {})
-  aux(-10, 0, {-10,0})
-end
-
-for i=1,10 do
-  local t = math.random(5)
-  assert(1 <= t and t <= 5)
-end
-
-
-print('OK')
diff --git a/lua-5.2.2-tests/nextvar.lua b/lua-5.2.2-tests/nextvar.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/nextvar.lua
+++ /dev/null
@@ -1,461 +0,0 @@
-print('testing tables, next, and for')
-
-local a = {}
-
--- make sure table has lots of space in hash part
-for i=1,100 do a[i.."+"] = true end
-for i=1,100 do a[i.."+"] = nil end
--- fill hash part with numeric indices testing size operator
-for i=1,100 do
-  a[i] = true
-  assert(#a == i)
-end
-
--- testing ipairs
-local x = 0
-for k,v in ipairs{10,20,30;x=12} do
-  x = x + 1
-  assert(k == x and v == x * 10)
-end
-
-for _ in ipairs{x=12, y=24} do assert(nil) end
-
--- test for 'false' x ipair
-x = false
-local i = 0
-for k,v in ipairs{true,false,true,false} do
-  i = i + 1
-  x = not x
-  assert(x == v)
-end
-assert(i == 4)
-
--- iterator function is always the same
-assert(type(ipairs{}) == 'function' and ipairs{} == ipairs{})
-
-if T then  --[
--- testing table sizes
-
-local function log2 (x) return math.log(x, 2) end
-
-local function mp2 (n)   -- minimum power of 2 >= n
-  local mp = 2^math.ceil(log2(n))
-  assert(n == 0 or (mp/2 < n and n <= mp))
-  return mp
-end
-
-local function fb (n)
-  local r, nn = T.int2fb(n)
-  assert(r < 256)
-  return nn
-end
-
--- test fb function
-local a = 1
-local lim = 2^30
-while a < lim do
-  local n = fb(a)
-  assert(a <= n and n <= a*1.125)
-  a = math.ceil(a*1.3)
-end
-
- 
-local function check (t, na, nh)
-  local a, h = T.querytab(t)
-  if a ~= na or h ~= nh then
-    print(na, nh, a, h)
-    assert(nil)
-  end
-end
-
-
--- testing C library sizes
-do
-  local s = 0
-  for _ in pairs(math) do s = s + 1 end
-  check(math, 0, mp2(s))
-end
-
-
--- testing constructor sizes
-local lim = 40
-local s = 'return {'
-for i=1,lim do
-  s = s..i..','
-  local s = s
-  for k=0,lim do 
-    local t = load(s..'}')()
-    assert(#t == i)
-    check(t, fb(i), mp2(k))
-    s = string.format('%sa%d=%d,', s, k, k)
-  end
-end
-
-
--- tests with unknown number of elements
-local a = {}
-for i=1,lim do a[i] = i end   -- build auxiliary table
-for k=0,lim do
-  local a = {table.unpack(a,1,k)}
-  assert(#a == k)
-  check(a, k, 0)
-  a = {1,2,3,table.unpack(a,1,k)}
-  check(a, k+3, 0)
-  assert(#a == k + 3)
-end
-
-
--- testing tables dynamically built
-local lim = 130
-local a = {}; a[2] = 1; check(a, 0, 1)
-a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
-a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
-a = {}
-for i = 1,lim do
-  a[i] = 1
-  assert(#a == i)
-  check(a, mp2(i), 0)
-end
-
-a = {}
-for i = 1,lim do
-  a['a'..i] = 1
-  assert(#a == 0)
-  check(a, 0, mp2(i))
-end
-
-a = {}
-for i=1,16 do a[i] = i end
-check(a, 16, 0)
-if not _port then
-  for i=1,11 do a[i] = nil end
-  for i=30,50 do a[i] = nil end   -- force a rehash (?)
-  check(a, 0, 8)   -- only 5 elements in the table
-  a[10] = 1
-  for i=30,50 do a[i] = nil end   -- force a rehash (?)
-  check(a, 0, 8)   -- only 6 elements in the table
-  for i=1,14 do a[i] = nil end
-  for i=18,50 do a[i] = nil end   -- force a rehash (?)
-  check(a, 0, 4)   -- only 2 elements ([15] and [16])
-end
-
--- reverse filling
-for i=1,lim do
-  local a = {}
-  for i=i,1,-1 do a[i] = i end   -- fill in reverse
-  check(a, mp2(i), 0)
-end
-
--- size tests for vararg
-lim = 35
-function foo (n, ...)
-  local arg = {...}
-  check(arg, n, 0)
-  assert(select('#', ...) == n)
-  arg[n+1] = true
-  check(arg, mp2(n+1), 0)
-  arg.x = true
-  check(arg, mp2(n+1), 1)
-end
-local a = {}
-for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
-
-end  --]
-
-
--- test size operation on empty tables
-assert(#{} == 0)
-assert(#{nil} == 0)
-assert(#{nil, nil} == 0)
-assert(#{nil, nil, nil} == 0)
-assert(#{nil, nil, nil, nil} == 0)
-print'+'
-
-
-local nofind = {}
-
-a,b,c = 1,2,3
-a,b,c = nil
-
-
--- next uses always the same iteraction function
-assert(next{} == next{})
-
-local function find (name)
-  local n,v
-  while 1 do
-    n,v = next(_G, n)
-    if not n then return nofind end
-    assert(v ~= nil)
-    if n == name then return v end
-  end
-end
-
-local function find1 (name)
-  for n,v in pairs(_G) do
-    if n==name then return v end
-  end
-  return nil  -- not found
-end
-
-
-assert(print==find("print") and print == find1("print"))
-assert(_G["print"]==find("print"))
-assert(assert==find1("assert"))
-assert(nofind==find("return"))
-assert(not find1("return"))
-_G["ret" .. "urn"] = nil
-assert(nofind==find("return"))
-_G["xxx"] = 1
-assert(xxx==find("xxx"))
-
-print('+')
-
-a = {}
-for i=0,10000 do
-  if math.fmod(i,10) ~= 0 then
-    a['x'..i] = i
-  end
-end
-
-n = {n=0}
-for i,v in pairs(a) do
-  n.n = n.n+1
-  assert(i and v and a[i] == v)
-end
-assert(n.n == 9000)
-a = nil
-
-do   -- clear global table
-  local a = {}
-  for n,v in pairs(_G) do a[n]=v end
-  for n,v in pairs(a) do
-    if not package.loaded[n] and type(v) ~= "function" and
-       not string.find(n, "^[%u_]") then
-     _G[n] = nil
-    end
-    collectgarbage()
-  end
-end
-
-
--- 
-
-local function checknext (a)
-  local b = {}
-  do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
-  for k,v in pairs(b) do assert(a[k] == v) end
-  for k,v in pairs(a) do assert(b[k] == v) end
-end
-
-checknext{1,x=1,y=2,z=3}
-checknext{1,2,x=1,y=2,z=3}
-checknext{1,2,3,x=1,y=2,z=3}
-checknext{1,2,3,4,x=1,y=2,z=3}
-checknext{1,2,3,4,5,x=1,y=2,z=3}
-
-assert(#{} == 0)
-assert(#{[-1] = 2} == 0)
-assert(#{1,2,3,nil,nil} == 3)
-for i=0,40 do
-  local a = {}
-  for j=1,i do a[j]=j end
-  assert(#a == i)
-end
-
--- 'maxn' is now deprecated, but it is easily defined in Lua
-function table.maxn (t)
-  local max = 0
-  for k in pairs(t) do
-    max = (type(k) == 'number') and math.max(max, k) or max
-  end
-  return max
-end
-
-assert(table.maxn{} == 0)
-assert(table.maxn{["1000"] = true} == 0)
-assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
-assert(table.maxn{[1000] = true} == 1000)
-assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
-
-table.maxn = nil
-
--- int overflow
-a = {}
-for i=0,50 do a[math.pow(2,i)] = true end
-assert(a[#a])
-
-print('+')
-
-
--- erasing values
-local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
-           [100.3] = 4, [4] = 5}
-
-local n = 0
-for k, v in pairs( t ) do
-  n = n+1
-  assert(t[k] == v)
-  t[k] = nil
-  collectgarbage()
-  assert(t[k] == nil)
-end
-assert(n == 5)
-
-
-local function test (a)
-  assert(not pcall(table.insert, a, 2, 20));
-  table.insert(a, 10); table.insert(a, 2, 20);
-  table.insert(a, 1, -1); table.insert(a, 40);
-  table.insert(a, #a+1, 50)
-  table.insert(a, 2, -2)
-  assert(not pcall(table.insert, a, 0, 20));
-  assert(not pcall(table.insert, a, #a + 2, 20));
-  assert(table.remove(a,1) == -1)
-  assert(table.remove(a,1) == -2)
-  assert(table.remove(a,1) == 10)
-  assert(table.remove(a,1) == 20)
-  assert(table.remove(a,1) == 40)
-  assert(table.remove(a,1) == 50)
-  assert(table.remove(a,1) == nil)
-  assert(table.remove(a) == nil)
-  assert(table.remove(a, #a) == nil)
-end
-
-a = {n=0, [-7] = "ban"}
-test(a)
-assert(a.n == 0 and a[-7] == "ban")
-
-a = {[-7] = "ban"};
-test(a)
-assert(a.n == nil and #a == 0 and a[-7] == "ban")
-
-a = {[-1] = "ban"}
-test(a)
-assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
-
-a = {[0] = "ban"}
-assert(#a == 0 and table.remove(a) == "ban" and a[0] == nil)
-
-table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
-assert(table.remove(a) == 10)
-assert(table.remove(a) == 20)
-assert(table.remove(a) == -1)
-assert(table.remove(a) == nil)
-
-a = {'c', 'd'}
-table.insert(a, 3, 'a')
-table.insert(a, 'b')
-assert(table.remove(a, 1) == 'c')
-assert(table.remove(a, 1) == 'd')
-assert(table.remove(a, 1) == 'a')
-assert(table.remove(a, 1) == 'b')
-assert(table.remove(a, 1) == nil)
-assert(#a == 0 and a.n == nil)
-
-a = {10,20,30,40}
-assert(table.remove(a, #a + 1) == nil)
-assert(not pcall(table.remove, a, 0))
-assert(a[#a] == 40)
-assert(table.remove(a, #a) == 40)
-assert(a[#a] == 30)
-assert(table.remove(a, 2) == 20)
-assert(a[#a] == 30 and #a == 2)
-print('+')
-
-a = {}
-for i=1,1000 do
-  a[i] = i; a[i-1] = nil
-end
-assert(next(a,nil) == 1000 and next(a,1000) == nil)
-
-assert(next({}) == nil)
-assert(next({}, nil) == nil)
-
-for a,b in pairs{} do error"not here" end
-for i=1,0 do error'not here' end
-for i=0,1,-1 do error'not here' end
-a = nil; for i=1,1 do assert(not a); a=1 end; assert(a)
-a = nil; for i=1,1,-1 do assert(not a); a=1 end; assert(a)
-
-if not _port then
-  print("testing precision in numeric for")
-  local a = 0; for i=0, 1, 0.1 do a=a+1 end; assert(a==11)
-  a = 0; for i=0, 0.999999999, 0.1 do a=a+1 end; assert(a==10)
-  a = 0; for i=1, 1, 1 do a=a+1 end; assert(a==1)
-  a = 0; for i=1e10, 1e10, -1 do a=a+1 end; assert(a==1)
-  a = 0; for i=1, 0.99999, 1 do a=a+1 end; assert(a==0)
-  a = 0; for i=99999, 1e5, -1 do a=a+1 end; assert(a==0)
-  a = 0; for i=1, 0.99999, -1 do a=a+1 end; assert(a==1)
-end
-
--- conversion
-a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
-
-
-collectgarbage()
-
-
--- testing generic 'for'
-
-local function f (n, p)
-  local t = {}; for i=1,p do t[i] = i*10 end
-  return function (_,n)
-           if n > 0 then
-             n = n-1
-             return n, table.unpack(t)
-           end
-         end, nil, n
-end
-
-local x = 0
-for n,a,b,c,d in f(5,3) do
-  x = x+1
-  assert(a == 10 and b == 20 and c == 30 and d == nil)
-end
-assert(x == 5)
-
-
-
--- testing __pairs and __ipairs metamethod
-a = {}
-do
-  local x,y,z = pairs(a)
-  assert(type(x) == 'function' and y == a and z == nil)
-end
-
-local function foo (e,i)
-  assert(e == a)
-  if i <= 10 then return i+1, i+2 end
-end
-
-local function foo1 (e,i)
-  i = i + 1
-  assert(e == a)
-  if i <= e.n then return i,a[i] end
-end
-
-setmetatable(a, {__pairs = function (x) return foo, x, 0 end})
-
-local i = 0
-for k,v in pairs(a) do
-  i = i + 1
-  assert(k == i and v == k+1)
-end
-
-a.n = 5
-a[3] = 30
-
-a = {n=10}
-setmetatable(a, {__len = function (x) return x.n end,
-                 __ipairs = function (x) return function (e,i)
-                             if i < #e then return i+1 end
-                           end, x, 0 end})
-i = 0
-for k,v in ipairs(a) do
-  i = i + 1
-  assert(k == i and v == nil)
-end
-assert(i == a.n)
-
-print"OK"
diff --git a/lua-5.2.2-tests/pm.lua b/lua-5.2.2-tests/pm.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/pm.lua
+++ /dev/null
@@ -1,344 +0,0 @@
-print('testing pattern matching')
-
-function f(s, p)
-  local i,e = string.find(s, p)
-  if i then return string.sub(s, i, e) end
-end
-
-function f1(s, p)
-  p = string.gsub(p, "%%([0-9])", function (s) return "%" .. (s+1) end)
-  p = string.gsub(p, "^(^?)", "%1()", 1)
-  p = string.gsub(p, "($?)$", "()%1", 1)
-  local t = {string.match(s, p)}
-  return string.sub(s, t[1], t[#t] - 1)
-end
-
-a,b = string.find('', '')    -- empty patterns are tricky
-assert(a == 1 and b == 0);
-a,b = string.find('alo', '')
-assert(a == 1 and b == 0)
-a,b = string.find('a\0o a\0o a\0o', 'a', 1)   -- first position
-assert(a == 1 and b == 1)
-a,b = string.find('a\0o a\0o a\0o', 'a\0o', 2)   -- starts in the midle
-assert(a == 5 and b == 7)
-a,b = string.find('a\0o a\0o a\0o', 'a\0o', 9)   -- starts in the midle
-assert(a == 9 and b == 11)
-a,b = string.find('a\0a\0a\0a\0\0ab', '\0ab', 2);  -- finds at the end
-assert(a == 9 and b == 11);
-a,b = string.find('a\0a\0a\0a\0\0ab', 'b')    -- last position
-assert(a == 11 and b == 11)
-assert(string.find('a\0a\0a\0a\0\0ab', 'b\0') == nil)   -- check ending
-assert(string.find('', '\0') == nil)
-assert(string.find('alo123alo', '12') == 4)
-assert(string.find('alo123alo', '^12') == nil)
-
-assert(string.match("aaab", ".*b") == "aaab")
-assert(string.match("aaa", ".*a") == "aaa")
-assert(string.match("b", ".*b") == "b")
-
-assert(string.match("aaab", ".+b") == "aaab")
-assert(string.match("aaa", ".+a") == "aaa")
-assert(not string.match("b", ".+b"))
-
-assert(string.match("aaab", ".?b") == "ab")
-assert(string.match("aaa", ".?a") == "aa")
-assert(string.match("b", ".?b") == "b")
-
-assert(f('aloALO', '%l*') == 'alo')
-assert(f('aLo_ALO', '%a*') == 'aLo')
-
-assert(f("  \n\r*&\n\r   xuxu  \n\n", "%g%g%g+") == "xuxu")
-
-assert(f('aaab', 'a*') == 'aaa');
-assert(f('aaa', '^.*$') == 'aaa');
-assert(f('aaa', 'b*') == '');
-assert(f('aaa', 'ab*a') == 'aa')
-assert(f('aba', 'ab*a') == 'aba')
-assert(f('aaab', 'a+') == 'aaa')
-assert(f('aaa', '^.+$') == 'aaa')
-assert(f('aaa', 'b+') == nil)
-assert(f('aaa', 'ab+a') == nil)
-assert(f('aba', 'ab+a') == 'aba')
-assert(f('a$a', '.$') == 'a')
-assert(f('a$a', '.%$') == 'a$')
-assert(f('a$a', '.$.') == 'a$a')
-assert(f('a$a', '$$') == nil)
-assert(f('a$b', 'a$') == nil)
-assert(f('a$a', '$') == '')
-assert(f('', 'b*') == '')
-assert(f('aaa', 'bb*') == nil)
-assert(f('aaab', 'a-') == '')
-assert(f('aaa', '^.-$') == 'aaa')
-assert(f('aabaaabaaabaaaba', 'b.*b') == 'baaabaaabaaab')
-assert(f('aabaaabaaabaaaba', 'b.-b') == 'baaab')
-assert(f('alo xo', '.o$') == 'xo')
-assert(f(' \n isto é assim', '%S%S*') == 'isto')
-assert(f(' \n isto é assim', '%S*$') == 'assim')
-assert(f(' \n isto é assim', '[a-z]*$') == 'assim')
-assert(f('um caracter ? extra', '[^%sa-z]') == '?')
-assert(f('', 'a?') == '')
-assert(f('á', 'á?') == 'á')
-assert(f('ábl', 'á?b?l?') == 'ábl')
-assert(f('  ábl', 'á?b?l?') == '')
-assert(f('aa', '^aa?a?a') == 'aa')
-assert(f(']]]áb', '[^]]') == 'á')
-assert(f("0alo alo", "%x*") == "0a")
-assert(f("alo alo", "%C+") == "alo alo")
-print('+')
-
-assert(f1('alo alx 123 b\0o b\0o', '(..*) %1') == "b\0o b\0o")
-assert(f1('axz123= 4= 4 34', '(.+)=(.*)=%2 %1') == '3= 4= 4 3')
-assert(f1('=======', '^(=*)=%1$') == '=======')
-assert(string.match('==========', '^([=]*)=%1$') == nil)
-
-local function range (i, j)
-  if i <= j then
-    return i, range(i+1, j)
-  end
-end
-
-local abc = string.char(range(0, 255));
-
-assert(string.len(abc) == 256)
-
-function strset (p)
-  local res = {s=''}
-  string.gsub(abc, p, function (c) res.s = res.s .. c end)
-  return res.s
-end;
-
-assert(string.len(strset('[\200-\210]')) == 11)
-
-assert(strset('[a-z]') == "abcdefghijklmnopqrstuvwxyz")
-assert(strset('[a-z%d]') == strset('[%da-uu-z]'))
-assert(strset('[a-]') == "-a")
-assert(strset('[^%W]') == strset('[%w]'))
-assert(strset('[]%%]') == '%]')
-assert(strset('[a%-z]') == '-az')
-assert(strset('[%^%[%-a%]%-b]') == '-[]^ab')
-assert(strset('%Z') == strset('[\1-\255]'))
-assert(strset('.') == strset('[\1-\255%z]'))
-print('+');
-
-assert(string.match("alo xyzK", "(%w+)K") == "xyz")
-assert(string.match("254 K", "(%d*)K") == "")
-assert(string.match("alo ", "(%w*)$") == "")
-assert(string.match("alo ", "(%w+)$") == nil)
-assert(string.find("(álo)", "%(á") == 1)
-local a, b, c, d, e = string.match("âlo alo", "^(((.).).* (%w*))$")
-assert(a == 'âlo alo' and b == 'âl' and c == 'â' and d == 'alo' and e == nil)
-a, b, c, d  = string.match('0123456789', '(.+(.?)())')
-assert(a == '0123456789' and b == '' and c == 11 and d == nil)
-print('+')
-
-assert(string.gsub('ülo ülo', 'ü', 'x') == 'xlo xlo')
-assert(string.gsub('alo úlo  ', ' +$', '') == 'alo úlo')  -- trim
-assert(string.gsub('  alo alo  ', '^%s*(.-)%s*$', '%1') == 'alo alo')  -- double trim
-assert(string.gsub('alo  alo  \n 123\n ', '%s+', ' ') == 'alo alo 123 ')
-t = "abç d"
-a, b = string.gsub(t, '(.)', '%1@')
-assert('@'..a == string.gsub(t, '', '@') and b == 5)
-a, b = string.gsub('abçd', '(.)', '%0@', 2)
-assert(a == 'a@b@çd' and b == 2)
-assert(string.gsub('alo alo', '()[al]', '%1') == '12o 56o')
-assert(string.gsub("abc=xyz", "(%w*)(%p)(%w+)", "%3%2%1-%0") ==
-              "xyz=abc-abc=xyz")
-assert(string.gsub("abc", "%w", "%1%0") == "aabbcc")
-assert(string.gsub("abc", "%w+", "%0%1") == "abcabc")
-assert(string.gsub('áéí', '$', '\0óú') == 'áéí\0óú')
-assert(string.gsub('', '^', 'r') == 'r')
-assert(string.gsub('', '$', 'r') == 'r')
-print('+')
-
-assert(string.gsub("um (dois) tres (quatro)", "(%(%w+%))", string.upper) ==
-            "um (DOIS) tres (QUATRO)")
-
-do
-  local function setglobal (n,v) rawset(_G, n, v) end
-  string.gsub("a=roberto,roberto=a", "(%w+)=(%w%w*)", setglobal)
-  assert(_G.a=="roberto" and _G.roberto=="a")
-end
-
-function f(a,b) return string.gsub(a,'.',b) end
-assert(string.gsub("trocar tudo em |teste|b| é |beleza|al|", "|([^|]*)|([^|]*)|", f) ==
-            "trocar tudo em bbbbb é alalalalalal")
-
-local function dostring (s) return load(s)() or "" end
-assert(string.gsub("alo $a=1$ novamente $return a$", "$([^$]*)%$", dostring) ==
-            "alo  novamente 1")
-
-x = string.gsub("$x=string.gsub('alo', '.', string.upper)$ assim vai para $return x$",
-         "$([^$]*)%$", dostring)
-assert(x == ' assim vai para ALO')
-
-t = {}
-s = 'a alo jose  joao'
-r = string.gsub(s, '()(%w+)()', function (a,w,b)
-      assert(string.len(w) == b-a);
-      t[a] = b-a;
-    end)
-assert(s == r and t[1] == 1 and t[3] == 3 and t[7] == 4 and t[13] == 4)
-
-
-function isbalanced (s)
-  return string.find(string.gsub(s, "%b()", ""), "[()]") == nil
-end
-
-assert(isbalanced("(9 ((8))(\0) 7) \0\0 a b ()(c)() a"))
-assert(not isbalanced("(9 ((8) 7) a b (\0 c) a"))
-assert(string.gsub("alo 'oi' alo", "%b''", '"') == 'alo " alo')
-
-
-local t = {"apple", "orange", "lime"; n=0}
-assert(string.gsub("x and x and x", "x", function () t.n=t.n+1; return t[t.n] end)
-        == "apple and orange and lime")
-
-t = {n=0}
-string.gsub("first second word", "%w%w*", function (w) t.n=t.n+1; t[t.n] = w end)
-assert(t[1] == "first" and t[2] == "second" and t[3] == "word" and t.n == 3)
-
-t = {n=0}
-assert(string.gsub("first second word", "%w+",
-         function (w) t.n=t.n+1; t[t.n] = w end, 2) == "first second word")
-assert(t[1] == "first" and t[2] == "second" and t[3] == nil)
-
-assert(not pcall(string.gsub, "alo", "(.", print))
-assert(not pcall(string.gsub, "alo", ".)", print))
-assert(not pcall(string.gsub, "alo", "(.", {}))
-assert(not pcall(string.gsub, "alo", "(.)", "%2"))
-assert(not pcall(string.gsub, "alo", "(%1)", "a"))
-assert(not pcall(string.gsub, "alo", "(%0)", "a"))
-
--- bug since 2.5 (C-stack overflow)
-do
-  local function f (size)
-    local s = string.rep("a", size)
-    local p = string.rep(".?", size)
-    return pcall(string.match, s, p)
-  end
-  local r, m = f(80)
-  assert(r and #m == 80)
-  r, m = f(200000)
-  assert(not r and string.find(m, "too complex"))
-end
-
-if not _soft then
-  -- big strings
-  local a = string.rep('a', 300000)
-  assert(string.find(a, '^a*.?$'))
-  assert(not string.find(a, '^a*.?b$'))
-  assert(string.find(a, '^a-.?$'))
-
-  -- bug in 5.1.2
-  a = string.rep('a', 10000) .. string.rep('b', 10000)
-  assert(not pcall(string.gsub, a, 'b'))
-end
-
--- recursive nest of gsubs
-function rev (s)
-  return string.gsub(s, "(.)(.+)", function (c,s1) return rev(s1)..c end)
-end
-
-local x = "abcdef"
-assert(rev(rev(x)) == x)
-
-
--- gsub with tables
-assert(string.gsub("alo alo", ".", {}) == "alo alo")
-assert(string.gsub("alo alo", "(.)", {a="AA", l=""}) == "AAo AAo")
-assert(string.gsub("alo alo", "(.).", {a="AA", l="K"}) == "AAo AAo")
-assert(string.gsub("alo alo", "((.)(.?))", {al="AA", o=false}) == "AAo AAo")
-
-assert(string.gsub("alo alo", "().", {2,5,6}) == "256 alo")
-
-t = {}; setmetatable(t, {__index = function (t,s) return string.upper(s) end})
-assert(string.gsub("a alo b hi", "%w%w+", t) == "a ALO b HI")
-
-
--- tests for gmatch
-local a = 0
-for i in string.gmatch('abcde', '()') do assert(i == a+1); a=i end
-assert(a==6)
-
-t = {n=0}
-for w in string.gmatch("first second word", "%w+") do
-      t.n=t.n+1; t[t.n] = w
-end
-assert(t[1] == "first" and t[2] == "second" and t[3] == "word")
-
-t = {3, 6, 9}
-for i in string.gmatch ("xuxx uu ppar r", "()(.)%2") do
-  assert(i == table.remove(t, 1))
-end
-assert(#t == 0)
-
-t = {}
-for i,j in string.gmatch("13 14 10 = 11, 15= 16, 22=23", "(%d+)%s*=%s*(%d+)") do
-  t[i] = j
-end
-a = 0
-for k,v in pairs(t) do assert(k+1 == v+0); a=a+1 end
-assert(a == 3)
-
-
--- tests for `%f' (`frontiers')
-
-assert(string.gsub("aaa aa a aaa a", "%f[%w]a", "x") == "xaa xa x xaa x")
-assert(string.gsub("[[]] [][] [[[[", "%f[[].", "x") == "x[]] x]x] x[[[")
-assert(string.gsub("01abc45de3", "%f[%d]", ".") == ".01abc.45de.3")
-assert(string.gsub("01abc45 de3x", "%f[%D]%w", ".") == "01.bc45 de3.")
-assert(string.gsub("function", "%f[\1-\255]%w", ".") == ".unction")
-assert(string.gsub("function", "%f[^\1-\255]", ".") == "function.")
-
-assert(string.find("a", "%f[a]") == 1)
-assert(string.find("a", "%f[^%z]") == 1)
-assert(string.find("a", "%f[^%l]") == 2)
-assert(string.find("aba", "%f[a%z]") == 3)
-assert(string.find("aba", "%f[%z]") == 4)
-assert(not string.find("aba", "%f[%l%z]"))
-assert(not string.find("aba", "%f[^%l%z]"))
-
-local i, e = string.find(" alo aalo allo", "%f[%S].-%f[%s].-%f[%S]")
-assert(i == 2 and e == 5)
-local k = string.match(" alo aalo allo", "%f[%S](.-%f[%s].-%f[%S])")
-assert(k == 'alo ')
-
-local a = {1, 5, 9, 14, 17,}
-for k in string.gmatch("alo alo th02 is 1hat", "()%f[%w%d]") do
-  assert(table.remove(a, 1) == k)
-end
-assert(#a == 0)
-
-
--- malformed patterns
-local function malform (p, m)
-  m = m or "malformed"
-  local r, msg = pcall(string.find, "a", p)
-  assert(not r and string.find(msg, m))
-end
-
-malform("[a")
-malform("[]")
-malform("[^]")
-malform("[a%]")
-malform("[a%")
-malform("%b")
-malform("%ba")
-malform("%")
-malform("%f", "missing")
-
--- \0 in patterns
-assert(string.match("ab\0\1\2c", "[\0-\2]+") == "\0\1\2")
-assert(string.match("ab\0\1\2c", "[\0-\0]+") == "\0")
-assert(string.find("b$a", "$\0?") == 2)
-assert(string.find("abc\0efg", "%\0") == 4)
-assert(string.match("abc\0efg\0\1e\1g", "%b\0\1") == "\0efg\0\1e\1")
-assert(string.match("abc\0\0\0", "%\0+") == "\0\0\0")
-assert(string.match("abc\0\0\0", "%\0%\0?") == "\0\0")
-
--- magic char after \0
-assert(string.find("abc\0\0","\0.") == 4)
-assert(string.find("abcx\0\0abc\0abc","x\0\0abc\0a.") == 4)
-
-print('OK')
-
diff --git a/lua-5.2.2-tests/sort.lua b/lua-5.2.2-tests/sort.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/sort.lua
+++ /dev/null
@@ -1,167 +0,0 @@
-print "testing (parts of) table library"
-
-print "testing unpack"
-
-local unpack = table.unpack
-
-local x,y,z,a,n
-a = {}; lim = 2000
-for i=1, lim do a[i]=i end
-assert(select(lim, unpack(a)) == lim and select('#', unpack(a)) == lim)
-x = unpack(a)
-assert(x == 1)
-x = {unpack(a)}
-assert(#x == lim and x[1] == 1 and x[lim] == lim)
-x = {unpack(a, lim-2)}
-assert(#x == 3 and x[1] == lim-2 and x[3] == lim)
-x = {unpack(a, 10, 6)}
-assert(next(x) == nil)   -- no elements
-x = {unpack(a, 11, 10)}
-assert(next(x) == nil)   -- no elements
-x,y = unpack(a, 10, 10)
-assert(x == 10 and y == nil)
-x,y,z = unpack(a, 10, 11)
-assert(x == 10 and y == 11 and z == nil)
-a,x = unpack{1}
-assert(a==1 and x==nil)
-a,x = unpack({1,2}, 1, 1)
-assert(a==1 and x==nil)
-
-if not _no32 then
-  assert(not pcall(unpack, {}, 0, 2^31-1))
-  assert(not pcall(unpack, {}, 1, 2^31-1))
-  assert(not pcall(unpack, {}, -(2^31), 2^31-1))
-  assert(not pcall(unpack, {}, -(2^31 - 1), 2^31-1))
-  assert(pcall(unpack, {}, 2^31-1, 0))
-  assert(pcall(unpack, {}, 2^31-1, 1))
-  pcall(unpack, {}, 1, 2^31)
-  a, b = unpack({[2^31-1] = 20}, 2^31-1, 2^31-1)
-  assert(a == 20 and b == nil)
-  a, b = unpack({[2^31-1] = 20}, 2^31-2, 2^31-1)
-  assert(a == nil and b == 20)
-end
-
-print "testing pack"
-
-a = table.pack()
-assert(a[1] == nil and a.n == 0) 
-
-a = table.pack(table)
-assert(a[1] == table and a.n == 1)
-
-a = table.pack(nil, nil, nil, nil)
-assert(a[1] == nil and a.n == 4)
-
-
-print"testing sort"
-
-
--- test checks for invalid order functions
-local function check (t)
-  local function f(a, b) assert(a and b); return true end
-  local s, e = pcall(table.sort, t, f)
-  assert(not s and e:find("invalid order function"))
-end
-
-check{1,2,3,4}
-check{1,2,3,4,5}
-check{1,2,3,4,5,6}
-
-
-function check (a, f)
-  f = f or function (x,y) return x<y end;
-  for n = #a, 2, -1 do
-    assert(not f(a[n], a[n-1]))
-  end
-end
-
-a = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
-     "Oct", "Nov", "Dec"}
-
-table.sort(a)
-check(a)
-
-function perm (s, n)
-  n = n or #s
-  if n == 1 then
-    local t = {unpack(s)}
-    table.sort(t)
-    check(t)
-  else
-    for i = 1, n do
-      s[i], s[n] = s[n], s[i]
-      perm(s, n - 1)
-      s[i], s[n] = s[n], s[i]
-    end
-  end
-end
-
-perm{}
-perm{1}
-perm{1,2}
-perm{1,2,3}
-perm{1,2,3,4}
-perm{2,2,3,4}
-perm{1,2,3,4,5}
-perm{1,2,3,3,5}
-perm{1,2,3,4,5,6}
-perm{2,2,3,3,5,6}
-
-limit = 30000
-if _soft then limit = 5000 end
-
-a = {}
-for i=1,limit do
-  a[i] = math.random()
-end
-
-local x = os.clock()
-table.sort(a)
-print(string.format("Sorting %d elements in %.2f sec.", limit, os.clock()-x))
-check(a)
-
-x = os.clock()
-table.sort(a)
-print(string.format("Re-sorting %d elements in %.2f sec.", limit, os.clock()-x))
-check(a)
-
-a = {}
-for i=1,limit do
-  a[i] = math.random()
-end
-
-x = os.clock(); i=0
-table.sort(a, function(x,y) i=i+1; return y<x end)
-print(string.format("Invert-sorting other %d elements in %.2f sec., with %i comparisons",
-      limit, os.clock()-x, i))
-check(a, function(x,y) return y<x end)
-
-
-table.sort{}  -- empty array
-
-for i=1,limit do a[i] = false end
-x = os.clock();
-table.sort(a, function(x,y) return nil end)
-print(string.format("Sorting %d equal elements in %.2f sec.", limit, os.clock()-x))
-check(a, function(x,y) return nil end)
-for i,v in pairs(a) do assert(not v or i=='n' and v==limit) end
-
-A = {"álo", "\0first :-)", "alo", "then this one", "45", "and a new"}
-table.sort(A)
-check(A)
-
-table.sort(A, function (x, y)
-          load(string.format("A[%q] = ''", x))()
-          collectgarbage()
-          return x<y
-        end)
-
-
-tt = {__lt = function (a,b) return a.val < b.val end}
-a = {}
-for i=1,10 do  a[i] = {val=math.random(100)}; setmetatable(a[i], tt); end
-table.sort(a)
-check(a, tt.__lt)
-check(a)
-
-print"OK"
diff --git a/lua-5.2.2-tests/strings.lua b/lua-5.2.2-tests/strings.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/strings.lua
+++ /dev/null
@@ -1,281 +0,0 @@
-print('testing strings and string library')
-
-assert('alo' < 'alo1')
-assert('' < 'a')
-assert('alo\0alo' < 'alo\0b')
-assert('alo\0alo\0\0' > 'alo\0alo\0')
-assert('alo' < 'alo\0')
-assert('alo\0' > 'alo')
-assert('\0' < '\1')
-assert('\0\0' < '\0\1')
-assert('\1\0a\0a' <= '\1\0a\0a')
-assert(not ('\1\0a\0b' <= '\1\0a\0a'))
-assert('\0\0\0' < '\0\0\0\0')
-assert(not('\0\0\0\0' < '\0\0\0'))
-assert('\0\0\0' <= '\0\0\0\0')
-assert(not('\0\0\0\0' <= '\0\0\0'))
-assert('\0\0\0' <= '\0\0\0')
-assert('\0\0\0' >= '\0\0\0')
-assert(not ('\0\0b' < '\0\0a\0'))
-print('+')
-
-assert(string.sub("123456789",2,4) == "234")
-assert(string.sub("123456789",7) == "789")
-assert(string.sub("123456789",7,6) == "")
-assert(string.sub("123456789",7,7) == "7")
-assert(string.sub("123456789",0,0) == "")
-assert(string.sub("123456789",-10,10) == "123456789")
-assert(string.sub("123456789",1,9) == "123456789")
-assert(string.sub("123456789",-10,-20) == "")
-assert(string.sub("123456789",-1) == "9")
-assert(string.sub("123456789",-4) == "6789")
-assert(string.sub("123456789",-6, -4) == "456")
-if not _no32 then
-  assert(string.sub("123456789",-2^31, -4) == "123456")
-  assert(string.sub("123456789",-2^31, 2^31 - 1) == "123456789")
-  assert(string.sub("123456789",-2^31, -2^31) == "")
-end
-assert(string.sub("\000123456789",3,5) == "234")
-assert(("\000123456789"):sub(8) == "789")
-print('+')
-
-assert(string.find("123456789", "345") == 3)
-a,b = string.find("123456789", "345")
-assert(string.sub("123456789", a, b) == "345")
-assert(string.find("1234567890123456789", "345", 3) == 3)
-assert(string.find("1234567890123456789", "345", 4) == 13)
-assert(string.find("1234567890123456789", "346", 4) == nil)
-assert(string.find("1234567890123456789", ".45", -9) == 13)
-assert(string.find("abcdefg", "\0", 5, 1) == nil)
-assert(string.find("", "") == 1)
-assert(string.find("", "", 1) == 1)
-assert(not string.find("", "", 2))
-assert(string.find('', 'aaa', 1) == nil)
-assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
-print('+')
-
-assert(string.len("") == 0)
-assert(string.len("\0\0\0") == 3)
-assert(string.len("1234567890") == 10)
-
-assert(#"" == 0)
-assert(#"\0\0\0" == 3)
-assert(#"1234567890" == 10)
-
-assert(string.byte("a") == 97)
-assert(string.byte("\xe4") > 127)
-assert(string.byte(string.char(255)) == 255)
-assert(string.byte(string.char(0)) == 0)
-assert(string.byte("\0") == 0)
-assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
-assert(string.byte("ba", 2) == 97)
-assert(string.byte("\n\n", 2, -1) == 10)
-assert(string.byte("\n\n", 2, 2) == 10)
-assert(string.byte("") == nil)
-assert(string.byte("hi", -3) == nil)
-assert(string.byte("hi", 3) == nil)
-assert(string.byte("hi", 9, 10) == nil)
-assert(string.byte("hi", 2, 1) == nil)
-assert(string.char() == "")
-assert(string.char(0, 255, 0) == "\0\255\0")
-assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
-assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
-assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
-assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
-print('+')
-
-assert(string.upper("ab\0c") == "AB\0C")
-assert(string.lower("\0ABCc%$") == "\0abcc%$")
-assert(string.rep('teste', 0) == '')
-assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
-assert(string.rep('', 10) == '')
-
--- repetitions with separator
-assert(string.rep('teste', 0, 'xuxu') == '')
-assert(string.rep('teste', 1, 'xuxu') == 'teste')
-assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
-assert(string.rep('', 10, '.') == string.rep('.', 9))
-if not _no32 then
-  assert(not pcall(string.rep, "aa", 2^30))
-  assert(not pcall(string.rep, "", 2^30, "aa"))
-end
-
-assert(string.reverse"" == "")
-assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
-assert(string.reverse"\0001234" == "4321\0")
-
-for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
-
-assert(type(tostring(nil)) == 'string')
-assert(type(tostring(12)) == 'string')
-assert(''..12 == '12' and type(12 .. '') == 'string')
-assert(string.find(tostring{}, 'table:'))
-assert(string.find(tostring(print), 'function:'))
-assert(tostring(1234567890123) == '1234567890123')
-assert(#tostring('\0') == 1)
-assert(tostring(true) == "true")
-assert(tostring(false) == "false")
-print('+')
-
-x = '"ílo"\n\\'
-assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
-assert(string.format('%q', "\0") == [["\0"]])
-assert(load(string.format('return %q', x))() == x)
-x = "\0\1\0023\5\0009"
-assert(load(string.format('return %q', x))() == x)
-assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
-              "\0\xe4\0b8c\0")
-assert(string.format('') == "")
-assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
-       string.format("%c%c%c%c", 34, 48, 90, 100))
-assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
-assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
-assert(tonumber(string.format("%f", 10.3)) == 10.3)
-x = string.format('"%-50s"', 'a')
-assert(#x == 52)
-assert(string.sub(x, 1, 4) == '"a  ')
-
-assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
-                     "-"..string.rep("%", 20)..".20s")
-assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
-       string.format("%q", "-"..string.rep("%", 2000)..".20s"))
-
--- format x tostring
-assert(string.format("%s %s", nil, true) == "nil true")
-assert(string.format("%s %.4s", false, true) == "false true")
-assert(string.format("%.3s %.3s", false, true) == "fal tru")
-local m = setmetatable({}, {__tostring = function () return "hello" end})
-assert(string.format("%s %.10s", m, m) == "hello hello")
-
-
-assert(string.format("%x", 0.3) == "0")
-assert(string.format("%02x", 0.1) == "00")
-assert(string.format("%08X", 2^32 - 1) == "FFFFFFFF")
-assert(string.format("%+08d", 2^31 - 1) == "+2147483647")
-assert(string.format("%+08d", -2^31) == "-2147483648")
-
-
--- longest number that can be formated
-assert(string.len(string.format('%99.99f', -1e308)) >= 100)
-
-
-
-if not _nolonglong then
-  print("testing large numbers for format")
-  assert(string.format("%8x", 2^52 - 1) == "fffffffffffff")
-  assert(string.format("%d", -1) == "-1")
-  assert(tonumber(string.format("%u", 2^62)) == 2^62)
-  assert(string.format("%8x", 0xffffffff) == "ffffffff")
-  assert(string.format("%8x", 0x7fffffff) == "7fffffff")
-  assert(string.format("%d", 2^53) == "9007199254740992")
-  assert(string.format("%d", -2^53) == "-9007199254740992")
-  assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
-  -- maximum integer that fits both in 64-int and (exact) double
-  local x = 2^64 - 2^(64-53)
-  assert(x == 0xfffffffffffff800)
-  assert(tonumber(string.format("%u", x)) == x)
-  assert(tonumber(string.format("0X%x", x)) == x)
-  assert(string.format("%x", x) == "fffffffffffff800")
-  assert(string.format("%d", x/2) == "9223372036854774784")
-  assert(string.format("%d", -x/2) == "-9223372036854774784")
-  assert(string.format("%d", -2^63) == "-9223372036854775808")
-  assert(string.format("%x", 2^63) == "8000000000000000")
-end
-
-if not _noformatA then
-  print("testing 'format %a %A'")
-  assert(string.format("%.2a", 0.5) == "0x1.00p-1")
-  assert(string.format("%A", 0x1fffffffffffff) == "0X1.FFFFFFFFFFFFFP+52")
-  assert(string.format("%.4a", -3) == "-0x1.8000p+1")
-  assert(tonumber(string.format("%a", -0.1)) == -0.1)
-end
-
--- errors in format
-
-local function check (fmt, msg)
-  local s, err = pcall(string.format, fmt, 10)
-  assert(not s and string.find(err, msg))
-end
-
-local aux = string.rep('0', 600)
-check("%100.3d", "too long")
-check("%1"..aux..".3d", "too long")
-check("%1.100d", "too long")
-check("%10.1"..aux.."004d", "too long")
-check("%t", "invalid option")
-check("%"..aux.."d", "repeated flags")
-check("%d %d", "no value")
-
-
--- integers out of range
-assert(not pcall(string.format, "%d", 2^63))
-assert(not pcall(string.format, "%x", 2^64))
-assert(not pcall(string.format, "%x", -2^64))
-assert(not pcall(string.format, "%x", -1))
-
-
-assert(load("return 1\n--comentário sem EOL no final")() == 1)
-
-
-assert(table.concat{} == "")
-assert(table.concat({}, 'x') == "")
-assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
-local a = {}; for i=1,3000 do a[i] = "xuxu" end
-assert(table.concat(a, "123").."123" == string.rep("xuxu123", 3000))
-assert(table.concat(a, "b", 20, 20) == "xuxu")
-assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
-assert(table.concat(a, "x", 22, 21) == "")
-assert(table.concat(a, "3", 2999) == "xuxu3xuxu")
-if not _no32 then
-  assert(table.concat({}, "x", 2^31-1, 2^31-2) == "")
-  assert(table.concat({}, "x", -2^31+1, -2^31) == "")
-  assert(table.concat({}, "x", 2^31-1, -2^31) == "")
-  assert(table.concat({[2^31-1] = "alo"}, "x", 2^31-1, 2^31-1) == "alo")
-end
-
-assert(not pcall(table.concat, {"a", "b", {}}))
-
-a = {"a","b","c"}
-assert(table.concat(a, ",", 1, 0) == "")
-assert(table.concat(a, ",", 1, 1) == "a")
-assert(table.concat(a, ",", 1, 2) == "a,b")
-assert(table.concat(a, ",", 2) == "b,c")
-assert(table.concat(a, ",", 3) == "c")
-assert(table.concat(a, ",", 4) == "")
-
-if not _port then
-
-local locales = { "ptb", "ISO-8859-1", "pt_BR" }
-local function trylocale (w)
-  for i = 1, #locales do
-    if os.setlocale(locales[i], w) then return true end
-  end
-  return false
-end
-
-if not trylocale("collate")  then
-  print("locale not supported")
-else
-  assert("alo" < "álo" and "álo" < "amo")
-end
-
-if not trylocale("ctype") then
-  print("locale not supported")
-else
-  assert(load("a = 3.4"));  -- parser should not change outside locale
-  assert(not load("á = 3.4"));  -- even with errors
-  assert(string.gsub("áéíóú", "%a", "x") == "xxxxx")
-  assert(string.gsub("áÁéÉ", "%l", "x") == "xÁxÉ")
-  assert(string.gsub("áÁéÉ", "%u", "x") == "áxéx")
-  assert(string.upper"áÁé{xuxu}ção" == "ÁÁÉ{XUXU}ÇÃO")
-end
-
-os.setlocale("C")
-assert(os.setlocale() == 'C')
-assert(os.setlocale(nil, "numeric") == 'C')
-
-end
-
-print('OK')
-
-
diff --git a/lua-5.2.2-tests/vararg.lua b/lua-5.2.2-tests/vararg.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/vararg.lua
+++ /dev/null
@@ -1,125 +0,0 @@
-print('testing vararg')
-
-_G.arg = nil
-
-function f(a, ...)
-  local arg = {n = select('#', ...), ...}
-  for i=1,arg.n do assert(a[i]==arg[i]) end
-  return arg.n
-end
-
-function c12 (...)
-  assert(arg == nil)
-  local x = {...}; x.n = #x
-  local res = (x.n==2 and x[1] == 1 and x[2] == 2)
-  if res then res = 55 end
-  return res, 2
-end
-
-function vararg (...) return {n = select('#', ...), ...} end
-
-local call = function (f, args) return f(table.unpack(args, 1, args.n)) end
-
-assert(f() == 0)
-assert(f({1,2,3}, 1, 2, 3) == 3)
-assert(f({"alo", nil, 45, f, nil}, "alo", nil, 45, f, nil) == 5)
-
-assert(c12(1,2)==55)
-a,b = assert(call(c12, {1,2}))
-assert(a == 55 and b == 2)
-a = call(c12, {1,2;n=2})
-assert(a == 55 and b == 2)
-a = call(c12, {1,2;n=1})
-assert(not a)
-assert(c12(1,2,3) == false)
-local a = vararg(call(next, {_G,nil;n=2}))
-local b,c = next(_G)
-assert(a[1] == b and a[2] == c and a.n == 2)
-a = vararg(call(call, {c12, {1,2}}))
-assert(a.n == 2 and a[1] == 55 and a[2] == 2)
-a = call(print, {'+'})
-assert(a == nil)
-
-local t = {1, 10}
-function t:f (...) local arg = {...}; return self[...]+#arg end
-assert(t:f(1,4) == 3 and t:f(2) == 11)
-print('+')
-
-lim = 20
-local i, a = 1, {}
-while i <= lim do a[i] = i+0.3; i=i+1 end
-
-function f(a, b, c, d, ...)
-  local more = {...}
-  assert(a == 1.3 and more[1] == 5.3 and
-         more[lim-4] == lim+0.3 and not more[lim-3])
-end
-
-function g(a,b,c)
-  assert(a == 1.3 and b == 2.3 and c == 3.3)
-end
-
-call(f, a)
-call(g, a)
-
-a = {}
-i = 1
-while i <= lim do a[i] = i; i=i+1 end
-assert(call(math.max, a) == lim)
-
-print("+")
-
-
--- new-style varargs
-
-function oneless (a, ...) return ... end
-
-function f (n, a, ...)
-  local b
-  assert(arg == nil)
-  if n == 0 then
-    local b, c, d = ...
-    return a, b, c, d, oneless(oneless(oneless(...)))
-  else
-    n, b, a = n-1, ..., a
-    assert(b == ...)
-    return f(n, a, ...)
-  end
-end
-
-a,b,c,d,e = assert(f(10,5,4,3,2,1))
-assert(a==5 and b==4 and c==3 and d==2 and e==1)
-
-a,b,c,d,e = f(4)
-assert(a==nil and b==nil and c==nil and d==nil and e==nil)
-
-
--- varargs for main chunks
-f = load[[ return {...} ]]
-x = f(2,3)
-assert(x[1] == 2 and x[2] == 3 and x[3] == nil)
-
-
-f = load[[
-  local x = {...}
-  for i=1,select('#', ...) do assert(x[i] == select(i, ...)) end
-  assert(x[select('#', ...)+1] == nil)
-  return true
-]]
-
-assert(f("a", "b", nil, {}, assert))
-assert(f())
-
-a = {select(3, table.unpack{10,20,30,40})}
-assert(#a == 2 and a[1] == 30 and a[2] == 40)
-a = {select(1)}
-assert(next(a) == nil)
-a = {select(-1, 3, 5, 7)}
-assert(a[1] == 7 and a[2] == nil)
-a = {select(-2, 3, 5, 7)}
-assert(a[1] == 5 and a[2] == 7 and a[3] == nil)
-pcall(select, 10000)
-pcall(select, -10000)
-
-print('OK')
-
diff --git a/lua-5.2.2-tests/verybig.lua b/lua-5.2.2-tests/verybig.lua
deleted file mode 100644
--- a/lua-5.2.2-tests/verybig.lua
+++ /dev/null
@@ -1,144 +0,0 @@
-print "testing RK"
-
--- testing opcodes with RK arguments larger than K limit
-local function foo ()
-  local dummy = {
-     -- fill first 256 entries in table of constants
-     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
-     17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
-     33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
-     49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
-     65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
-     81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96,
-     97, 98, 99, 100, 101, 102, 103, 104,
-     105, 106, 107, 108, 109, 110, 111, 112,
-     113, 114, 115, 116, 117, 118, 119, 120,
-     121, 122, 123, 124, 125, 126, 127, 128,
-     129, 130, 131, 132, 133, 134, 135, 136,
-     137, 138, 139, 140, 141, 142, 143, 144,
-     145, 146, 147, 148, 149, 150, 151, 152,
-     153, 154, 155, 156, 157, 158, 159, 160,
-     161, 162, 163, 164, 165, 166, 167, 168,
-     169, 170, 171, 172, 173, 174, 175, 176,
-     177, 178, 179, 180, 181, 182, 183, 184,
-     185, 186, 187, 188, 189, 190, 191, 192,
-     193, 194, 195, 196, 197, 198, 199, 200,
-     201, 202, 203, 204, 205, 206, 207, 208,
-     209, 210, 211, 212, 213, 214, 215, 216,
-     217, 218, 219, 220, 221, 222, 223, 224,
-     225, 226, 227, 228, 229, 230, 231, 232,
-     233, 234, 235, 236, 237, 238, 239, 240,
-     241, 242, 243, 244, 245, 246, 247, 248,
-     249, 250, 251, 252, 253, 254, 255, 256,
-  }
-  assert(24.5 + 0.6 == 25.1)
-  local t = {foo = function (self, x) return x + self.x end, x = 10}
-  t.t = t
-  assert(t:foo(1.5) == 11.5)
-  assert(t.t:foo(0.5) == 10.5)   -- bug in 5.2 alpha
-  assert(24.3 == 24.3)
-  assert((function () return t.x end)() == 10)
-end
-
-
-foo()
-foo = nil
-
-if _soft then return 10 end
-
-print "testing large programs (>64k)"
-
--- template to create a very big test file
-prog = [[$
-
-local a,b
-
-b = {$1$
-  b30009 = 65534,
-  b30010 = 65535,
-  b30011 = 65536,
-  b30012 = 65537,
-  b30013 = 16777214,
-  b30014 = 16777215,
-  b30015 = 16777216,
-  b30016 = 16777217,
-  b30017 = 4294967294,
-  b30018 = 4294967295,
-  b30019 = 4294967296,
-  b30020 = 4294967297,
-  b30021 = -65534,
-  b30022 = -65535,
-  b30023 = -65536,
-  b30024 = -4294967297,
-  b30025 = 15012.5,
-  $2$
-};
-
-assert(b.a50008 == 25004 and b["a11"] == 5.5)
-assert(b.a33007 == 16503.5 and b.a50009 == 25004.5)
-assert(b["b"..30024] == -4294967297)
-
-function b:xxx (a,b) return a+b end
-assert(b:xxx(10, 12) == 22)   -- pushself with non-constant index
-b.xxx = nil
-
-s = 0; n=0
-for a,b in pairs(b) do s=s+b; n=n+1 end
-assert(s==13977183656.5  and n==70001)
-
-
-a = nil; b = nil
-print'+'
-
-function f(x) b=x end
-
-a = f{$3$} or 10
-
-assert(a==10)
-assert(b[1] == "a10" and b[2] == 5 and b[#b-1] == "a50009")
-
-
-function xxxx (x) return b[x] end
-
-assert(xxxx(3) == "a11")
-
-a = nil; b=nil
-xxxx = nil
-
-return 10
-
-]]
-
--- functions to fill in the $n$
-F = {
-function ()   -- $1$
-  for i=10,50009 do
-    io.write('a', i, ' = ', 5+((i-10)/2), ',\n')
-  end
-end,
-
-function ()   -- $2$
-  for i=30026,50009 do
-    io.write('b', i, ' = ', 15013+((i-30026)/2), ',\n')
-  end
-end,
-
-function ()   -- $3$
-  for i=10,50009 do
-    io.write('"a', i, '", ', 5+((i-10)/2), ',\n')
-  end
-end,
-}
-
-file = os.tmpname()
-io.output(file)
-for s in string.gmatch(prog, "$([^$]+)") do
-  local n = tonumber(s)
-  if not n then io.write(s) else F[n]() end
-end
-io.close()
-result = dofile(file)
-assert(os.remove(file))
-print'OK'
-return result
-
diff --git a/lua-5.3.1-tests/all.lua b/lua-5.3.1-tests/all.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/all.lua
@@ -0,0 +1,261 @@
+-- $Id: all.lua,v 1.93 2015/05/15 12:28:08 roberto Exp $
+
+local version = "Lua 5.3"
+if _VERSION ~= version then
+  io.stderr:write("\nThis test suite is for ", version, ", not for ", _VERSION,
+    "\nExiting tests\n")
+  return
+end
+
+
+_G._ARG = arg   -- save arg for other tests
+
+
+-- next variables control the execution of some tests
+-- true means no test (so an undefined variable does not skip a test)
+-- defaults are for Linux; test everything.
+-- Make true to avoid long or memory consuming tests
+_soft = rawget(_G, "_soft") or false
+-- Make true to avoid non-portable tests
+_port = rawget(_G, "_port") or false
+-- Make true to avoid messages about tests not performed
+_nomsg = rawget(_G, "_nomsg") or false
+
+
+local usertests = rawget(_G, "_U")
+
+if usertests then
+  -- tests for sissies ;)  Avoid problems
+  _soft = true
+  _port = true
+  _nomsg = true
+end
+
+-- tests should require debug when needed
+debug = nil
+
+if usertests then
+  T = nil    -- no "internal" tests for user tests
+else
+  T = rawget(_G, "T")  -- avoid problems with 'strict' module
+end
+
+math.randomseed(0)
+
+--[=[
+  example of a long [comment],
+  [[spanning several [lines]]]
+
+]=]
+
+print("current path:\n****" .. package.path .. "****\n")
+
+
+local initclock = os.clock()
+local lastclock = initclock
+local walltime = os.time()
+
+local collectgarbage = collectgarbage
+
+do   -- (
+
+-- track messages for tests not performed
+local msgs = {}
+function Message (m)
+  if not _nomsg then
+    print(m)
+    msgs[#msgs+1] = string.sub(m, 3, -3)
+  end
+end
+
+assert(os.setlocale"C")
+
+local T,print,format,write,assert,type,unpack,floor =
+      T,print,string.format,io.write,assert,type,table.unpack,math.floor
+
+-- use K for 1000 and M for 1000000 (not 2^10 -- 2^20)
+local function F (m)
+  local function round (m)
+    m = m + 0.04999
+    return format("%.1f", m)      -- keep one decimal digit
+  end
+  if m < 1000 then return m
+  else
+    m = m / 1000
+    if m < 1000 then return round(m).."K"
+    else
+      return round(m/1000).."M"
+    end
+  end
+end
+
+local showmem
+if not T then
+  local max = 0
+  showmem = function ()
+    local m = collectgarbage("count") * 1024
+    max = (m > max) and m or max
+    print(format("    ---- total memory: %s, max memory: %s ----\n",
+          F(m), F(max)))
+  end
+else
+  showmem = function ()
+    T.checkmemory()
+    local total, numblocks, maxmem = T.totalmem()
+    local count = collectgarbage("count")
+    print(format(
+      "\n    ---- total memory: %s (%.0fK), max use: %s,  blocks: %d\n",
+      F(total), count, F(maxmem), numblocks))
+    print(format("\t(strings:  %d, tables: %d, functions: %d, "..
+                 "\n\tudata: %d, threads: %d)",
+                 T.totalmem"string", T.totalmem"table", T.totalmem"function",
+                 T.totalmem"userdata", T.totalmem"thread"))
+  end
+end
+
+
+--
+-- redefine dofile to run files through dump/undump
+--
+local function report (n) print("\n***** FILE '"..n.."'*****") end
+local olddofile = dofile
+local dofile = function (n, strip)
+  showmem()
+  local c = os.clock()
+  print(string.format("time: %g (+%g)", c - initclock, c - lastclock))
+  lastclock = c
+  report(n)
+  local f = assert(loadfile(n))
+  local b = string.dump(f, strip)
+  f = assert(load(b))
+  return f()
+end
+
+dofile('main.lua')
+
+do
+  local next, setmetatable, stderr = next, setmetatable, io.stderr
+  -- track collections
+  local mt = {}
+  -- each time a table is collected, remark it for finalization
+  -- on next cycle
+  mt.__gc = function (o)
+     stderr:write'.'    -- mark progress
+     local n = setmetatable(o, mt)   -- remark it
+   end
+   local n = setmetatable({}, mt)    -- create object
+end
+
+report"gc.lua"
+local f = assert(loadfile('gc.lua'))
+f()
+
+dofile('db.lua')
+assert(dofile('calls.lua') == deep and deep)
+olddofile('strings.lua')
+olddofile('literals.lua')
+dofile('tpack.lua')
+assert(dofile('attrib.lua') == 27)
+
+assert(dofile('locals.lua') == 5)
+dofile('constructs.lua')
+dofile('code.lua', true)
+if not _G._soft then
+  report('big.lua')
+  local f = coroutine.wrap(assert(loadfile('big.lua')))
+  assert(f() == 'b')
+  assert(f() == 'a')
+end
+dofile('nextvar.lua')
+dofile('pm.lua')
+dofile('utf8.lua')
+dofile('api.lua')
+assert(dofile('events.lua') == 12)
+dofile('vararg.lua')
+dofile('closure.lua')
+dofile('coroutine.lua')
+dofile('goto.lua', true)
+dofile('errors.lua')
+dofile('math.lua')
+dofile('sort.lua', true)
+dofile('bitwise.lua')
+assert(dofile('verybig.lua', true) == 10); collectgarbage()
+dofile('files.lua')
+
+if #msgs > 0 then
+  print("\ntests not performed:")
+  for i=1,#msgs do
+    print(msgs[i])
+  end
+  print()
+end
+
+-- no test module should define 'debug'
+assert(debug == nil)
+
+local debug = require "debug"
+
+print(string.format("%d-bit integers, %d-bit floats",
+        string.packsize("j") * 8, string.packsize("n") * 8))
+
+debug.sethook(function (a) assert(type(a) == 'string') end, "cr")
+
+-- to survive outside block
+_G.showmem = showmem
+
+end   --)
+
+local _G, showmem, print, format, clock, time, difftime, assert, open =
+      _G, showmem, print, string.format, os.clock, os.time, os.difftime,
+      assert, io.open
+
+-- file with time of last performed test
+local fname = T and "time-debug.txt" or "time.txt"
+local lasttime
+
+if not usertests then
+  -- open file with time of last performed test
+  local f = io.open(fname)
+  if f then
+    lasttime = assert(tonumber(f:read'a'))
+    f:close();
+  else   -- no such file; assume it is recording time for first time
+    lasttime = nil
+  end
+end
+
+-- erase (almost) all globals
+print('cleaning all!!!!')
+for n in pairs(_G) do
+  if not ({___Glob = 1, tostring = 1})[n] then
+    _G[n] = nil
+  end
+end
+
+
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage();showmem()
+
+local clocktime = clock() - initclock
+walltime = difftime(time(), walltime)
+
+print(format("\n\ntotal time: %.2fs (wall time: %gs)\n", clocktime, walltime))
+
+if not usertests then
+  lasttime = lasttime or clocktime    -- if no last time, ignore difference
+  -- check whether current test time differs more than 5% from last time
+  local diff = (clocktime - lasttime) / clocktime
+  local tolerance = 0.05    -- 5%
+  if (diff >= tolerance or diff <= -tolerance) then
+    print(format("WARNING: time difference from previous test: %+.1f%%",
+                  diff * 100))
+  end
+  assert(open(fname, "w")):write(clocktime):close()
+end
+
+print("final OK !!!")
+
diff --git a/lua-5.3.1-tests/api.lua b/lua-5.3.1-tests/api.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/api.lua
@@ -0,0 +1,1143 @@
+-- $Id: api.lua,v 1.141 2015/05/15 12:25:38 roberto Exp $
+
+if T==nil then
+  (Message or print)('\n >>> testC not active: skipping API tests <<<\n')
+  return
+end
+
+local debug = require "debug"
+
+local pack = table.pack
+
+
+function tcheck (t1, t2)
+  assert(t1.n == (t2.n or #t2) + 1)
+  for i = 2, t1.n do assert(t1[i] == t2[i - 1]) end
+end
+
+
+local function checkerr (msg, f, ...)
+  local stat, err = pcall(f, ...)
+  assert(not stat and string.find(err, msg))
+end
+
+
+print('testing C API')
+
+a = T.testC("pushvalue R; return 1")
+assert(a == debug.getregistry())
+
+
+-- absindex
+assert(T.testC("settop 10; absindex -1; return 1") == 10)
+assert(T.testC("settop 5; absindex -5; return 1") == 1)
+assert(T.testC("settop 10; absindex 1; return 1") == 1)
+assert(T.testC("settop 10; absindex R; return 1") < -10)
+
+-- testing alignment
+a = T.d2s(12458954321123.0)
+assert(a == string.pack("d", 12458954321123.0))
+assert(T.s2d(a) == 12458954321123.0)
+
+a,b,c = T.testC("pushnum 1; pushnum 2; pushnum 3; return 2")
+assert(a == 2 and b == 3 and not c)
+
+f = T.makeCfunc("pushnum 1; pushnum 2; pushnum 3; return 2")
+a,b,c = f()
+assert(a == 2 and b == 3 and not c)
+
+-- test that all trues are equal
+a,b,c = T.testC("pushbool 1; pushbool 2; pushbool 0; return 3")
+assert(a == b and a == true and c == false)
+a,b,c = T.testC"pushbool 0; pushbool 10; pushnil;\
+                      tobool -3; tobool -3; tobool -3; return 3"
+assert(a==false and b==true and c==false)
+
+
+a,b,c = T.testC("gettop; return 2", 10, 20, 30, 40)
+assert(a == 40 and b == 5 and not c)
+
+t = pack(T.testC("settop 5; gettop; return .", 2, 3))
+tcheck(t, {n=4,2,3})
+
+t = pack(T.testC("settop 0; settop 15; return 10", 3, 1, 23))
+assert(t.n == 10 and t[1] == nil and t[10] == nil)
+
+t = pack(T.testC("remove -2; gettop; return .", 2, 3, 4))
+tcheck(t, {n=2,2,4})
+
+t = pack(T.testC("insert -1; gettop; return .", 2, 3))
+tcheck(t, {n=2,2,3})
+
+t = pack(T.testC("insert 3; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,5,3,4})
+
+t = pack(T.testC("replace 2; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,5,3,4})
+
+t = pack(T.testC("replace -2; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,2,3,5})
+
+t = pack(T.testC("remove 3; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,2,4,5})
+
+t = pack(T.testC("copy 3 4; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,3,3,5})
+
+t = pack(T.testC("copy -3 -1; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,3,4,3})
+
+do   -- testing 'rotate'
+  local t = {10, 20, 30, 40, 50, 60}
+  for i = -6, 6 do
+    local s = string.format("rotate 2 %d; return 7", i)
+    local t1 = pack(T.testC(s, 10, 20, 30, 40, 50, 60))
+    tcheck(t1, t)
+    table.insert(t, 1, table.remove(t))
+  end
+
+  t = pack(T.testC("rotate -2 1; gettop; return .", 10, 20, 30, 40))
+  tcheck(t, {10, 20, 40, 30})
+  t = pack(T.testC("rotate -2 -1; gettop; return .", 10, 20, 30, 40))
+  tcheck(t, {10, 20, 40, 30})
+
+  -- some corner cases
+  t = pack(T.testC("rotate -1 0; gettop; return .", 10, 20, 30, 40))
+  tcheck(t, {10, 20, 30, 40})
+  t = pack(T.testC("rotate -1 1; gettop; return .", 10, 20, 30, 40))
+  tcheck(t, {10, 20, 30, 40})
+  t = pack(T.testC("rotate 5 -1; gettop; return .", 10, 20, 30, 40))
+  tcheck(t, {10, 20, 30, 40})
+end
+
+-- testing non-function message handlers
+do
+  local f = T.makeCfunc[[
+    getglobal error
+    pushstring bola
+    pcall 1 1 1   # call 'error' with given handler
+    pushstatus
+    return 2     # return error message and status
+  ]]
+
+  local msg, st = f({})     -- invalid handler
+  assert(st == "ERRERR" and string.find(msg, "error handling"))
+  local msg, st = f(nil)     -- invalid handler
+  assert(st == "ERRERR" and string.find(msg, "error handling"))
+
+  local a = setmetatable({}, {__call = function (_, x) return x:upper() end})
+  local msg, st = f(a)   -- callable handler
+  assert(st == "ERRRUN" and msg == "BOLA")
+end
+
+t = pack(T.testC("insert 3; pushvalue 3; remove 3; pushvalue 2; remove 2; \
+                  insert 2; pushvalue 1; remove 1; insert 1; \
+      insert -2; pushvalue -2; remove -3; gettop; return .",
+      2, 3, 4, 5, 10, 40, 90))
+tcheck(t, {n=7,2,3,4,5,10,40,90})
+
+t = pack(T.testC("concat 5; gettop; return .", "alo", 2, 3, "joao", 12))
+tcheck(t, {n=1,"alo23joao12"})
+
+-- testing MULTRET
+t = pack(T.testC("call 2,-1; gettop; return .",
+     function (a,b) return 1,2,3,4,a,b end, "alo", "joao"))
+tcheck(t, {n=6,1,2,3,4,"alo", "joao"})
+
+do  -- test returning more results than fit in the caller stack
+  local a = {}
+  for i=1,1000 do a[i] = true end; a[999] = 10
+  local b = T.testC([[pcall 1 -1 0; pop 1; tostring -1; return 1]],
+                    table.unpack, a)
+  assert(b == "10")
+end
+
+
+-- testing globals
+_G.a = 14; _G.b = "a31"
+local a = {T.testC[[
+  getglobal a;
+  getglobal b;
+  getglobal b;
+  setglobal a;
+  gettop;
+  return .
+]]}
+assert(a[2] == 14 and a[3] == "a31" and a[4] == nil and _G.a == "a31")
+
+
+-- testing arith
+assert(T.testC("pushnum 10; pushnum 20; arith /; return 1") == 0.5)
+assert(T.testC("pushnum 10; pushnum 20; arith -; return 1") == -10)
+assert(T.testC("pushnum 10; pushnum -20; arith *; return 1") == -200)
+assert(T.testC("pushnum 10; pushnum 3; arith ^; return 1") == 1000)
+assert(T.testC("pushnum 10; pushstring 20; arith /; return 1") == 0.5)
+assert(T.testC("pushstring 10; pushnum 20; arith -; return 1") == -10)
+assert(T.testC("pushstring 10; pushstring -20; arith *; return 1") == -200)
+assert(T.testC("pushstring 10; pushstring 3; arith ^; return 1") == 1000)
+assert(T.testC("arith /; return 1", 2, 0) == 10.0/0)
+a = T.testC("pushnum 10; pushint 3; arith \\; return 1")
+assert(a == 3.0 and math.type(a) == "float")
+a = T.testC("pushint 10; pushint 3; arith \\; return 1")
+assert(a == 3 and math.type(a) == "integer")
+a = assert(T.testC("pushint 10; pushint 3; arith +; return 1"))
+assert(a == 13 and math.type(a) == "integer")
+a = assert(T.testC("pushnum 10; pushint 3; arith +; return 1"))
+assert(a == 13 and math.type(a) == "float")
+a,b,c = T.testC([[pushnum 1;
+                  pushstring 10; arith _;
+                  pushstring 5; return 3]])
+assert(a == 1 and b == -10 and c == "5")
+mt = {__add = function (a,b) return setmetatable({a[1] + b[1]}, mt) end,
+      __mod = function (a,b) return setmetatable({a[1] % b[1]}, mt) end,
+      __unm = function (a) return setmetatable({a[1]* 2}, mt) end}
+a,b,c = setmetatable({4}, mt),
+        setmetatable({8}, mt),
+        setmetatable({-3}, mt)
+x,y,z = T.testC("arith +; return 2", 10, a, b)
+assert(x == 10 and y[1] == 12 and z == nil)
+assert(T.testC("arith %; return 1", a, c)[1] == 4%-3)
+assert(T.testC("arith _; arith +; arith %; return 1", b, a, c)[1] ==
+               8 % (4 + (-3)*2))
+
+-- errors in arithmetic
+checkerr("divide by zero", T.testC, "arith \\", 10, 0)
+checkerr("%%0", T.testC, "arith %", 10, 0)
+
+
+-- testing lessthan and lessequal
+assert(T.testC("compare LT 2 5, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare LE 2 5, return 1", 3, 2, 2, 4, 2, 2))
+assert(not T.testC("compare LT 3 4, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare LE 3 4, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare LT 5 2, return 1", 4, 2, 2, 3, 2, 2))
+assert(not T.testC("compare LT 2 -3, return 1", "4", "2", "2", "3", "2", "2"))
+assert(not T.testC("compare LT -3 2, return 1", "3", "2", "2", "4", "2", "2"))
+
+-- non-valid indices produce false
+assert(not T.testC("compare LT 1 4, return 1"))
+assert(not T.testC("compare LE 9 1, return 1"))
+assert(not T.testC("compare EQ 9 9, return 1"))
+
+local b = {__lt = function (a,b) return a[1] < b[1] end}
+local a1,a3,a4 = setmetatable({1}, b),
+                 setmetatable({3}, b),
+                 setmetatable({4}, b)
+assert(T.testC("compare LT 2 5, return 1", a3, 2, 2, a4, 2, 2))
+assert(T.testC("compare LE 2 5, return 1", a3, 2, 2, a4, 2, 2))
+assert(T.testC("compare LT 5 -6, return 1", a4, 2, 2, a3, 2, 2))
+a,b = T.testC("compare LT 5 -6, return 2", a1, 2, 2, a3, 2, 20)
+assert(a == 20 and b == false)
+a,b = T.testC("compare LE 5 -6, return 2", a1, 2, 2, a3, 2, 20)
+assert(a == 20 and b == false)
+a,b = T.testC("compare LE 5 -6, return 2", a1, 2, 2, a1, 2, 20)
+assert(a == 20 and b == true)
+
+-- testing length
+local t = setmetatable({x = 20}, {__len = function (t) return t.x end})
+a,b,c = T.testC([[
+   len 2;
+   Llen 2;
+   objsize 2;
+   return 3
+]], t)
+assert(a == 20 and b == 20 and c == 0)
+
+t.x = "234"; t[1] = 20
+a,b,c = T.testC([[
+   len 2;
+   Llen 2;
+   objsize 2;
+   return 3
+]], t)
+assert(a == "234" and b == 234 and c == 1)
+
+t.x = print; t[1] = 20
+a,c = T.testC([[
+   len 2;
+   objsize 2;
+   return 2
+]], t)
+assert(a == print and c == 1)
+
+
+-- testing __concat
+
+a = setmetatable({x="u"}, {__concat = function (a,b) return a.x..'.'..b.x end})
+x,y = T.testC([[
+  pushnum 5
+  pushvalue 2;
+  pushvalue 2;
+  concat 2;
+  pushvalue -2;
+  return 2;
+]], a, a)
+assert(x == a..a and y == 5)
+
+-- concat with 0 elements
+assert(T.testC("concat 0; return 1") == "")
+
+-- concat with 1 element
+assert(T.testC("concat 1; return 1", "xuxu") == "xuxu")
+
+
+
+-- testing lua_is
+
+function B(x) return x and 1 or 0 end
+
+function count (x, n)
+  n = n or 2
+  local prog = [[
+    isnumber %d;
+    isstring %d;
+    isfunction %d;
+    iscfunction %d;
+    istable %d;
+    isuserdata %d;
+    isnil %d;
+    isnull %d;
+    return 8
+  ]]
+  prog = string.format(prog, n, n, n, n, n, n, n, n)
+  local a,b,c,d,e,f,g,h = T.testC(prog, x)
+  return B(a)+B(b)+B(c)+B(d)+B(e)+B(f)+B(g)+(100*B(h))
+end
+
+assert(count(3) == 2)
+assert(count('alo') == 1)
+assert(count('32') == 2)
+assert(count({}) == 1)
+assert(count(print) == 2)
+assert(count(function () end) == 1)
+assert(count(nil) == 1)
+assert(count(io.stdin) == 1)
+assert(count(nil, 15) == 100)
+
+
+-- testing lua_to...
+
+function to (s, x, n)
+  n = n or 2
+  return T.testC(string.format("%s %d; return 1", s, n), x)
+end
+
+assert(to("tostring", {}) == nil)
+assert(to("tostring", "alo") == "alo")
+assert(to("tostring", 12) == "12")
+assert(to("tostring", 12, 3) == nil)
+assert(to("objsize", {}) == 0)
+assert(to("objsize", {1,2,3}) == 3)
+assert(to("objsize", "alo\0\0a") == 6)
+assert(to("objsize", T.newuserdata(0)) == 0)
+assert(to("objsize", T.newuserdata(101)) == 101)
+assert(to("objsize", 124) == 0)
+assert(to("objsize", true) == 0)
+assert(to("tonumber", {}) == 0)
+assert(to("tonumber", "12") == 12)
+assert(to("tonumber", "s2") == 0)
+assert(to("tonumber", 1, 20) == 0)
+assert(to("topointer", 10) == 0)
+assert(to("topointer", true) == 0)
+assert(to("topointer", T.pushuserdata(20)) == 20)
+assert(to("topointer", io.read) ~= 0)           -- light C function
+assert(to("topointer", type) ~= 0)        -- "heavy" C function
+assert(to("topointer", function () end) ~= 0)   -- Lua function
+assert(to("func2num", 20) == 0)
+assert(to("func2num", T.pushuserdata(10)) == 0)
+assert(to("func2num", io.read) ~= 0)     -- light C function
+assert(to("func2num", type) ~= 0)  -- "heavy" C function (with upvalue)
+a = to("tocfunction", math.deg)
+assert(a(3) == math.deg(3) and a == math.deg)
+
+
+print("testing panic function")
+do
+  -- trivial error
+  assert(T.checkpanic("pushstring hi; error") == "hi")
+
+  -- using the stack inside panic
+  assert(T.checkpanic("pushstring hi; error;",
+    [[checkstack 5 XX
+      pushstring ' alo'
+      pushstring ' mundo'
+      concat 3]]) == "hi alo mundo")
+
+  -- "argerror" without frames
+  assert(T.checkpanic("loadstring 4") ==
+      "bad argument #4 (string expected, got no value)")
+  
+
+  -- memory error
+  T.totalmem(T.totalmem()+10000)   -- set low memory limit (+10k)
+  assert(T.checkpanic("newuserdata 20000") == "not enough memory")
+  T.totalmem(0)          -- restore high limit
+
+  -- stack error
+  if not _soft then
+    local msg = T.checkpanic[[
+      pushstring "function f() f() end"
+      loadstring -1; call 0 0
+      getglobal f; call 0 0
+    ]]
+    assert(string.find(msg, "stack overflow"))
+  end
+
+end
+
+-- testing deep C stack
+if not _soft then
+  print("testing stack overflow")
+  collectgarbage("stop")
+  checkerr("XXXX", T.testC, "checkstack 1000023 XXXX")   -- too deep
+  -- too deep (with no message)
+  checkerr("^stack overflow$", T.testC, "checkstack 1000023 ''")
+  local s = string.rep("pushnil;checkstack 1 XX;", 1000000)
+  checkerr("XX", T.testC, s)
+  collectgarbage("restart")
+  print'+'
+end
+
+local lim = _soft and 500 or 12000
+local prog = {"checkstack " .. (lim * 2 + 100) .. "msg", "newtable"}
+for i = 1,lim do
+  prog[#prog + 1] = "pushnum " .. i
+  prog[#prog + 1] = "pushnum " .. i * 10
+end
+
+prog[#prog + 1] = "rawgeti R 2"   -- get global table in registry
+prog[#prog + 1] = "insert " .. -(2*lim + 2)
+
+for i = 1,lim do
+  prog[#prog + 1] = "settable " .. -(2*(lim - i + 1) + 1)
+end
+
+prog[#prog + 1] = "return 2"
+
+prog = table.concat(prog, ";")
+local g, t = T.testC(prog)
+assert(g == _G)
+for i = 1,lim do assert(t[i] == i*10); t[i] = nil end
+assert(next(t) == nil)
+prog, g, t = nil
+
+-- testing errors
+
+a = T.testC([[
+  loadstring 2; pcall 0 1 0;
+  pushvalue 3; insert -2; pcall 1 1 0;
+  pcall 0 0 0;
+  return 1
+]], "x=150", function (a) assert(a==nil); return 3 end)
+
+assert(type(a) == 'string' and x == 150)
+
+function check3(p, ...)
+  local arg = {...}
+  assert(#arg == 3)
+  assert(string.find(arg[3], p))
+end
+check3(":1:", T.testC("loadstring 2; gettop; return .", "x="))
+check3("%.", T.testC("loadfile 2; gettop; return .", "."))
+check3("xxxx", T.testC("loadfile 2; gettop; return .", "xxxx"))
+
+-- test errors in non protected threads
+function checkerrnopro (code, msg)
+  local th = coroutine.create(function () end)  -- create new thread
+  local stt, err = pcall(T.testC, th, code)   -- run code there
+  assert(not stt and string.find(err, msg))
+end
+
+if not _soft then
+  checkerrnopro("pushnum 3; call 0 0", "attempt to call")
+  print"testing stack overflow in unprotected thread"
+  function f () f() end
+  checkerrnopro("getglobal 'f'; call 0 0;", "stack overflow")
+end
+print"+"
+
+
+-- testing table access
+
+do   -- getp/setp
+  local a = {}
+  T.testC("rawsetp 2 1", a, 20)
+  assert(a[T.pushuserdata(1)] == 20)
+  assert(T.testC("rawgetp 2 1; return 1", a) == 20)
+end
+
+a = {x=0, y=12}
+x, y = T.testC("gettable 2; pushvalue 4; gettable 2; return 2",
+                a, 3, "y", 4, "x")
+assert(x == 0 and y == 12)
+T.testC("settable -5", a, 3, 4, "x", 15)
+assert(a.x == 15)
+a[a] = print
+x = T.testC("gettable 2; return 1", a)  -- table and key are the same object!
+assert(x == print)
+T.testC("settable 2", a, "x")    -- table and key are the same object!
+assert(a[a] == "x")
+
+b = setmetatable({p = a}, {})
+getmetatable(b).__index = function (t, i) return t.p[i] end
+k, x = T.testC("gettable 3, return 2", 4, b, 20, 35, "x")
+assert(x == 15 and k == 35)
+getmetatable(b).__index = function (t, i) return a[i] end
+getmetatable(b).__newindex = function (t, i,v ) a[i] = v end
+y = T.testC("insert 2; gettable -5; return 1", 2, 3, 4, "y", b)
+assert(y == 12)
+k = T.testC("settable -5, return 1", b, 3, 4, "x", 16)
+assert(a.x == 16 and k == 4)
+a[b] = 'xuxu'
+y = T.testC("gettable 2, return 1", b)
+assert(y == 'xuxu')
+T.testC("settable 2", b, 19)
+assert(a[b] == 19)
+
+-- testing next
+a = {}
+t = pack(T.testC("next; gettop; return .", a, nil))
+tcheck(t, {n=1,a})
+a = {a=3}
+t = pack(T.testC("next; gettop; return .", a, nil))
+tcheck(t, {n=3,a,'a',3})
+t = pack(T.testC("next; pop 1; next; gettop; return .", a, nil))
+tcheck(t, {n=1,a})
+
+
+
+-- testing upvalues
+
+do
+  local A = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
+  t, b, c = A([[pushvalue U0; pushvalue U1; pushvalue U2; return 3]])
+  assert(b == 10 and c == 20 and type(t) == 'table')
+  a, b = A([[tostring U3; tonumber U4; return 2]])
+  assert(a == nil and b == 0)
+  A([[pushnum 100; pushnum 200; replace U2; replace U1]])
+  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
+  assert(b == 100 and c == 200)
+  A([[replace U2; replace U1]], {x=1}, {x=2})
+  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
+  assert(b.x == 1 and c.x == 2)
+  T.checkmemory()
+end
+
+
+-- testing absent upvalues from C-function pointers
+assert(T.testC[[isnull U1; return 1]] == true)
+assert(T.testC[[isnull U100; return 1]] == true)
+assert(T.testC[[pushvalue U1; return 1]] == nil)
+
+local f = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
+assert(T.upvalue(f, 1) == 10 and
+       T.upvalue(f, 2) == 20 and
+       T.upvalue(f, 3) == nil)
+T.upvalue(f, 2, "xuxu")
+assert(T.upvalue(f, 2) == "xuxu")
+
+
+-- large closures
+do
+  local A = "checkstack 300 msg;" ..
+            string.rep("pushnum 10;", 255) ..
+            "pushcclosure 255; return 1"
+  A = T.testC(A)
+  for i=1,255 do
+    assert(A(("pushvalue U%d; return 1"):format(i)) == 10)
+  end
+  assert(A("isnull U256; return 1"))
+  assert(not A("isnil U256; return 1"))
+end
+
+
+
+-- testing get/setuservalue
+-- bug in 5.1.2
+checkerr("got number", debug.setuservalue, 3, {})
+checkerr("got nil", debug.setuservalue, nil, {})
+checkerr("got light userdata", debug.setuservalue, T.pushuserdata(1), {})
+
+local b = T.newuserdata(0)
+assert(debug.getuservalue(b) == nil)
+for _, v in pairs{true, false, 4.56, print, {}, b, "XYZ"} do
+  assert(debug.setuservalue(b, v) == b)
+  assert(debug.getuservalue(b) == v)
+end
+
+assert(debug.getuservalue(4) == nil)
+
+debug.setuservalue(b, function () return 10 end)
+collectgarbage()   -- function should not be collected
+assert(debug.getuservalue(b)() == 10)
+
+debug.setuservalue(b, 134)
+collectgarbage()   -- number should not be a problem for collector
+assert(debug.getuservalue(b) == 134)
+
+-- test barrier for uservalues
+T.gcstate("atomic")
+assert(T.gccolor(b) == "black")
+debug.setuservalue(b, {x = 100})
+T.gcstate("pause")  -- complete collection
+assert(debug.getuservalue(b).x == 100)  -- uvalue should be there
+
+-- long chain of userdata
+for i = 1, 1000 do
+  local bb = T.newuserdata(0)
+  debug.setuservalue(bb, b)
+  b = bb
+end
+collectgarbage()     -- nothing should not be collected
+for i = 1, 1000 do
+  b = debug.getuservalue(b)
+end
+assert(debug.getuservalue(b).x == 100)
+b = nil
+
+
+-- testing locks (refs)
+
+-- reuse of references
+local i = T.ref{}
+T.unref(i)
+assert(T.ref{} == i)
+
+Arr = {}
+Lim = 100
+for i=1,Lim do   -- lock many objects
+  Arr[i] = T.ref({})
+end
+
+assert(T.ref(nil) == -1 and T.getref(-1) == nil)
+T.unref(-1); T.unref(-1)
+
+for i=1,Lim do   -- unlock all them
+  T.unref(Arr[i])
+end
+
+function printlocks ()
+  local f = T.makeCfunc("gettable R; return 1")
+  local n = f("n")
+  print("n", n)
+  for i=0,n do
+    print(i, f(i))
+  end
+end
+
+
+for i=1,Lim do   -- lock many objects
+  Arr[i] = T.ref({})
+end
+
+for i=1,Lim,2 do   -- unlock half of them
+  T.unref(Arr[i])
+end
+
+assert(type(T.getref(Arr[2])) == 'table')
+
+
+assert(T.getref(-1) == nil)
+
+
+a = T.ref({})
+
+collectgarbage()
+
+assert(type(T.getref(a)) == 'table')
+
+
+-- colect in cl the `val' of all collected userdata
+tt = {}
+cl = {n=0}
+A = nil; B = nil
+local F
+F = function (x)
+  local udval = T.udataval(x)
+  table.insert(cl, udval)
+  local d = T.newuserdata(100)   -- cria lixo
+  d = nil
+  assert(debug.getmetatable(x).__gc == F)
+  assert(load("table.insert({}, {})"))()   -- cria mais lixo
+  collectgarbage()   -- forca coleta de lixo durante coleta!
+  assert(debug.getmetatable(x).__gc == F)   -- coleta anterior nao melou isso?
+  local dummy = {}    -- cria lixo durante coleta
+  if A ~= nil then
+    assert(type(A) == "userdata")
+    assert(T.udataval(A) == B)
+    debug.getmetatable(A)    -- just acess it
+  end
+  A = x   -- ressucita userdata
+  B = udval
+  return 1,2,3
+end
+tt.__gc = F
+
+-- test whether udate collection frees memory in the right time
+do
+  collectgarbage();
+  collectgarbage();
+  local x = collectgarbage("count");
+  local a = T.newuserdata(5001)
+  assert(T.testC("objsize 2; return 1", a) == 5001)
+  assert(collectgarbage("count") >= x+4)
+  a = nil
+  collectgarbage();
+  assert(collectgarbage("count") <= x+1)
+  -- udata without finalizer
+  x = collectgarbage("count")
+  collectgarbage("stop")
+  for i=1,1000 do T.newuserdata(0) end
+  assert(collectgarbage("count") > x+10)
+  collectgarbage()
+  assert(collectgarbage("count") <= x+1)
+  -- udata with finalizer
+  collectgarbage()
+  x = collectgarbage("count")
+  collectgarbage("stop")
+  a = {__gc = function () end}
+  for i=1,1000 do debug.setmetatable(T.newuserdata(0), a) end
+  assert(collectgarbage("count") >= x+10)
+  collectgarbage()  -- this collection only calls TM, without freeing memory
+  assert(collectgarbage("count") >= x+10)
+  collectgarbage()  -- now frees memory
+  assert(collectgarbage("count") <= x+1)
+  collectgarbage("restart")
+end
+
+
+collectgarbage("stop")
+
+-- create 3 userdatas with tag `tt'
+a = T.newuserdata(0); debug.setmetatable(a, tt); na = T.udataval(a)
+b = T.newuserdata(0); debug.setmetatable(b, tt); nb = T.udataval(b)
+c = T.newuserdata(0); debug.setmetatable(c, tt); nc = T.udataval(c)
+
+-- create userdata without meta table
+x = T.newuserdata(4)
+y = T.newuserdata(0)
+
+checkerr("FILE%* expected, got userdata", io.input, a)
+checkerr("FILE%* expected, got userdata", io.input, x)
+
+assert(debug.getmetatable(x) == nil and debug.getmetatable(y) == nil)
+
+d=T.ref(a);
+e=T.ref(b);
+f=T.ref(c);
+t = {T.getref(d), T.getref(e), T.getref(f)}
+assert(t[1] == a and t[2] == b and t[3] == c)
+
+t=nil; a=nil; c=nil;
+T.unref(e); T.unref(f)
+
+collectgarbage()
+
+-- check that unref objects have been collected
+assert(#cl == 1 and cl[1] == nc)
+
+x = T.getref(d)
+assert(type(x) == 'userdata' and debug.getmetatable(x) == tt)
+x =nil
+tt.b = b  -- create cycle
+tt=nil    -- frees tt for GC
+A = nil
+b = nil
+T.unref(d);
+n5 = T.newuserdata(0)
+debug.setmetatable(n5, {__gc=F})
+n5 = T.udataval(n5)
+collectgarbage()
+assert(#cl == 4)
+-- check order of collection
+assert(cl[2] == n5 and cl[3] == nb and cl[4] == na)
+
+collectgarbage"restart"
+
+
+a, na = {}, {}
+for i=30,1,-1 do
+  a[i] = T.newuserdata(0)
+  debug.setmetatable(a[i], {__gc=F})
+  na[i] = T.udataval(a[i])
+end
+cl = {}
+a = nil; collectgarbage()
+assert(#cl == 30)
+for i=1,30 do assert(cl[i] == na[i]) end
+na = nil
+
+
+for i=2,Lim,2 do   -- unlock the other half
+  T.unref(Arr[i])
+end
+
+x = T.newuserdata(41); debug.setmetatable(x, {__gc=F})
+assert(T.testC("objsize 2; return 1", x) == 41)
+cl = {}
+a = {[x] = 1}
+x = T.udataval(x)
+collectgarbage()
+-- old `x' cannot be collected (`a' still uses it)
+assert(#cl == 0)
+for n in pairs(a) do a[n] = nil end
+collectgarbage()
+assert(#cl == 1 and cl[1] == x)   -- old `x' must be collected
+
+-- testing lua_equal
+assert(T.testC("compare EQ 2 4; return 1", print, 1, print, 20))
+assert(T.testC("compare EQ 3 2; return 1", 'alo', "alo"))
+assert(T.testC("compare EQ 2 3; return 1", nil, nil))
+assert(not T.testC("compare EQ 2 3; return 1", {}, {}))
+assert(not T.testC("compare EQ 2 3; return 1"))
+assert(not T.testC("compare EQ 2 3; return 1", 3))
+
+-- testing lua_equal with fallbacks
+do
+  local map = {}
+  local t = {__eq = function (a,b) return map[a] == map[b] end}
+  local function f(x)
+    local u = T.newuserdata(0)
+    debug.setmetatable(u, t)
+    map[u] = x
+    return u
+  end
+  assert(f(10) == f(10))
+  assert(f(10) ~= f(11))
+  assert(T.testC("compare EQ 2 3; return 1", f(10), f(10)))
+  assert(not T.testC("compare EQ 2 3; return 1", f(10), f(20)))
+  t.__eq = nil
+  assert(f(10) ~= f(10))
+end
+
+print'+'
+
+
+
+-- testing changing hooks during hooks
+_G.t = {}
+T.sethook([[
+  # set a line hook after 3 count hooks
+  sethook 4 0 '
+    getglobal t;
+    pushvalue -3; append -2
+    pushvalue -2; append -2
+  ']], "c", 3)
+local a = 1   -- counting
+a = 1   -- counting
+a = 1   -- count hook (set line hook)
+a = 1   -- line hook
+a = 1   -- line hook
+debug.sethook()
+t = _G.t
+assert(t[1] == "line")
+line = t[2]
+assert(t[3] == "line" and t[4] == line + 1)
+assert(t[5] == "line" and t[6] == line + 2)
+assert(t[7] == nil)
+
+
+-------------------------------------------------------------------------
+do   -- testing errors during GC
+  local a = {}
+  for i=1,20 do
+    a[i] = T.newuserdata(i)   -- creates several udata
+  end
+  for i=1,20,2 do   -- mark half of them to raise errors during GC
+    debug.setmetatable(a[i], {__gc = function (x) error("error inside gc") end})
+  end
+  for i=2,20,2 do   -- mark the other half to count and to create more garbage
+    debug.setmetatable(a[i], {__gc = function (x) load("A=A+1")() end})
+  end
+  _G.A = 0
+  a = 0
+  while 1 do
+    local stat, msg = pcall(collectgarbage)
+    if stat then
+      break   -- stop when no more errors
+    else
+      a = a + 1
+      assert(string.find(msg, "__gc"))
+    end
+  end
+  assert(a == 10)  -- number of errors
+
+  assert(A == 10)  -- number of normal collections
+end
+-------------------------------------------------------------------------
+-- test for userdata vals
+do
+  local a = {}; local lim = 30
+  for i=0,lim do a[i] = T.pushuserdata(i) end
+  for i=0,lim do assert(T.udataval(a[i]) == i) end
+  for i=0,lim do assert(T.pushuserdata(i) == a[i]) end
+  for i=0,lim do a[a[i]] = i end
+  for i=0,lim do a[T.pushuserdata(i)] = i end
+  assert(type(tostring(a[1])) == "string")
+end
+
+
+-------------------------------------------------------------------------
+-- testing multiple states
+T.closestate(T.newstate());
+L1 = T.newstate()
+assert(L1)
+
+assert(T.doremote(L1, "X='a'; return 'a'") == 'a')
+
+
+assert(#pack(T.doremote(L1, "function f () return 'alo', 3 end; f()")) == 0)
+
+a, b = T.doremote(L1, "return f()")
+assert(a == 'alo' and b == '3')
+
+T.doremote(L1, "_ERRORMESSAGE = nil")
+-- error: `sin' is not defined
+a, _, b = T.doremote(L1, "return sin(1)")
+assert(a == nil and b == 2)   -- 2 == run-time error
+
+-- error: syntax error
+a, b, c = T.doremote(L1, "return a+")
+assert(a == nil and c == 3 and type(b) == "string")   -- 3 == syntax error
+
+T.loadlib(L1)
+a, b, c = T.doremote(L1, [[
+  string = require'string'
+  a = require'_G'; assert(a == _G and require("_G") == a)
+  io = require'io'; assert(type(io.read) == "function")
+  assert(require("io") == io)
+  a = require'table'; assert(type(a.insert) == "function")
+  a = require'debug'; assert(type(a.getlocal) == "function")
+  a = require'math'; assert(type(a.sin) == "function")
+  return string.sub('okinama', 1, 2)
+]])
+assert(a == "ok")
+
+T.closestate(L1);
+
+
+L1 = T.newstate()
+T.loadlib(L1)
+T.doremote(L1, "a = {}")
+T.testC(L1, [[getglobal "a"; pushstring "x"; pushint 1;
+             settable -3]])
+assert(T.doremote(L1, "return a.x") == "1")
+
+T.closestate(L1)
+
+L1 = nil
+
+print('+')
+
+-------------------------------------------------------------------------
+-- testing memory limits
+-------------------------------------------------------------------------
+checkerr("block too big", T.newuserdata, math.maxinteger)
+collectgarbage()
+T.totalmem(T.totalmem()+5000)   -- set low memory limit (+5k)
+checkerr("not enough memory", load"local a={}; for i=1,100000 do a[i]=i end")
+T.totalmem(0)          -- restore high limit
+
+-- test memory errors; increase memory limit in small steps, so that
+-- we get memory errors in different parts of a given task, up to there
+-- is enough memory to complete the task without errors
+function testamem (s, f)
+  collectgarbage(); collectgarbage()
+  local M = T.totalmem()
+  local oldM = M
+  local a,b = nil
+  while 1 do
+    M = M+7   -- increase memory limit in small steps
+    T.totalmem(M)
+    a, b = pcall(f)
+    T.totalmem(0)  -- restore high limit
+    if a and b then break end       -- stop when no more errors
+    collectgarbage()
+    if not a and not    -- `real' error?
+      (string.find(b, "memory") or string.find(b, "overflow")) then
+      error(b, 0)   -- propagate it
+    end
+  end
+  print("\nlimit for " .. s .. ": " .. M-oldM)
+  return b
+end
+
+
+-- testing memory errors when creating a new state
+
+b = testamem("state creation", T.newstate)
+T.closestate(b);  -- close new state
+
+
+-- testing threads
+
+-- get main thread from registry (at index LUA_RIDX_MAINTHREAD == 1)
+mt = T.testC("rawgeti R 1; return 1")
+assert(type(mt) == "thread" and coroutine.running() == mt)
+
+
+
+function expand (n,s)
+  if n==0 then return "" end
+  local e = string.rep("=", n)
+  return string.format("T.doonnewstack([%s[ %s;\n collectgarbage(); %s]%s])\n",
+                              e, s, expand(n-1,s), e)
+end
+
+G=0; collectgarbage(); a =collectgarbage("count")
+load(expand(20,"G=G+1"))()
+assert(G==20); collectgarbage();  -- assert(gcinfo() <= a+1)
+
+testamem("thread creation", function ()
+  return T.doonnewstack("x=1") == 0  -- try to create thread
+end)
+
+
+-- testing memory x compiler
+
+testamem("loadstring", function ()
+  return load("x=1")  -- try to do load a string
+end)
+
+
+local testprog = [[
+local function foo () return end
+local t = {"x"}
+a = "aaa"
+for i = 1, #t do a=a..t[i] end
+return true
+]]
+
+-- testing memory x dofile
+_G.a = nil
+local t =os.tmpname()
+local f = assert(io.open(t, "w"))
+f:write(testprog)
+f:close()
+testamem("dofile", function ()
+  local a = loadfile(t)
+  return a and a()
+end)
+assert(os.remove(t))
+assert(_G.a == "aaax")
+
+
+-- other generic tests
+
+testamem("string creation", function ()
+  local a, b = string.gsub("alo alo", "(a)", function (x) return x..'b' end)
+  return (a == 'ablo ablo')
+end)
+
+testamem("dump/undump", function ()
+  local a = load(testprog)
+  local b = a and string.dump(a)
+  a = b and load(b)
+  return a and a()
+end)
+
+local t = os.tmpname()
+testamem("file creation", function ()
+  local f = assert(io.open(t, 'w'))
+  assert (not io.open"nomenaoexistente")
+  io.close(f);
+  return not loadfile'nomenaoexistente'
+end)
+assert(os.remove(t))
+
+testamem("table creation", function ()
+  local a, lim = {}, 10
+  for i=1,lim do a[i] = i; a[i..'a'] = {} end
+  return (type(a[lim..'a']) == 'table' and a[lim] == lim)
+end)
+
+testamem("constructors", function ()
+  local a = {10, 20, 30, 40, 50; a=1, b=2, c=3, d=4, e=5}
+  return (type(a) == 'table' and a.e == 5)
+end)
+
+local a = 1
+close = nil
+testamem("closure creation", function ()
+  function close (b,c)
+   return function (x) return a+b+c+x end
+  end
+  return (close(2,3)(4) == 10)
+end)
+
+testamem("coroutines", function ()
+  local a = coroutine.wrap(function ()
+              coroutine.yield(string.rep("a", 10))
+              return {}
+            end)
+  assert(string.len(a()) == 10)
+  return a()
+end)
+
+print'+'
+
+-- testing some auxlib functions
+local function gsub (a, b, c)
+  a, b = T.testC("gsub 2 3 4; gettop; return 2", a, b, c)
+  assert(b == 5)
+  return a
+end
+
+assert(gsub("alo.alo.uhuh.", ".", "//") == "alo//alo//uhuh//")
+assert(gsub("alo.alo.uhuh.", "alo", "//") == "//.//.uhuh.")
+assert(gsub("", "alo", "//") == "")
+assert(gsub("...", ".", "/.") == "/././.")
+assert(gsub("...", "...", "") == "")
+
+
+-- testing luaL_newmetatable
+local mt_xuxu, res, top = T.testC("newmetatable xuxu; gettop; return 3")
+assert(type(mt_xuxu) == "table" and res and top == 3)
+local d, res, top = T.testC("newmetatable xuxu; gettop; return 3")
+assert(mt_xuxu == d and not res and top == 3)
+d, res, top = T.testC("newmetatable xuxu1; gettop; return 3")
+assert(mt_xuxu ~= d and res and top == 3)
+
+x = T.newuserdata(0);
+y = T.newuserdata(0);
+T.testC("pushstring xuxu; gettable R; setmetatable 2", x)
+assert(getmetatable(x) == mt_xuxu)
+
+-- testing luaL_testudata
+-- correct metatable
+local res1, res2, top = T.testC([[testudata -1 xuxu
+   	 			  testudata 2 xuxu
+				  gettop
+				  return 3]], x)
+assert(res1 and res2 and top == 4)
+
+-- wrong metatable
+res1, res2, top = T.testC([[testudata -1 xuxu1
+			    testudata 2 xuxu1
+			    gettop
+			    return 3]], x)
+assert(not res1 and not res2 and top == 4)
+
+-- non-existent type
+res1, res2, top = T.testC([[testudata -1 xuxu2
+			    testudata 2 xuxu2
+			    gettop
+			    return 3]], x)
+assert(not res1 and not res2 and top == 4)
+
+-- userdata has no metatable
+res1, res2, top = T.testC([[testudata -1 xuxu
+			    testudata 2 xuxu
+			    gettop
+			    return 3]], y)
+assert(not res1 and not res2 and top == 4)
+
+-- erase metatables
+do
+  local r = debug.getregistry()
+  assert(r.xuxu == mt_xuxu and r.xuxu1 == d)
+  r.xuxu = nil; r.xuxu1 = nil
+end
+
+print'OK'
+
diff --git a/lua-5.3.1-tests/attrib.lua b/lua-5.3.1-tests/attrib.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/attrib.lua
@@ -0,0 +1,462 @@
+-- $Id: attrib.lua,v 1.62 2015/04/30 14:15:57 roberto Exp $
+
+print "testing require"
+
+assert(require"string" == string)
+assert(require"math" == math)
+assert(require"table" == table)
+assert(require"io" == io)
+assert(require"os" == os)
+assert(require"coroutine" == coroutine)
+
+assert(type(package.path) == "string")
+assert(type(package.cpath) == "string")
+assert(type(package.loaded) == "table")
+assert(type(package.preload) == "table")
+
+assert(type(package.config) == "string")
+print("package config: "..string.gsub(package.config, "\n", "|"))
+
+do
+  -- create a path with 'max' templates,
+  -- each with 1-10 repetitions of '?'
+  local max = _soft and 100 or 2000
+  local t = {}
+  for i = 1,max do t[i] = string.rep("?", i%10 + 1) end
+  t[#t + 1] = ";"    -- empty template
+  local path = table.concat(t, ";")
+  -- use that path in a search
+  local s, err = package.searchpath("xuxu", path)
+  -- search fails; check that message has an occurence of
+  -- '??????????' with ? replaced by xuxu and at least 'max' lines
+  assert(not s and
+         string.find(err, string.rep("xuxu", 10)) and
+         #string.gsub(err, "[^\n]", "") >= max)
+  -- path with one very long template
+  local path = string.rep("?", max)
+  local s, err = package.searchpath("xuxu", path)
+  assert(not s and string.find(err, string.rep('xuxu', max)))
+end
+
+do
+  local oldpath = package.path
+  package.path = {}
+  local s, err = pcall(require, "no-such-file")
+  assert(not s and string.find(err, "package.path"))
+  package.path = oldpath
+end
+
+print('+')
+
+
+-- The next tests for 'require' assume some specific directories and
+-- libraries.
+
+if not _port then --[
+
+local dirsep = string.match(package.config, "^([^\n]+)\n")
+
+-- auxiliary directory with C modules and temporary files
+local DIR = "libs" .. dirsep
+
+-- prepend DIR to a name and correct directory separators
+local function D (x)
+  x = string.gsub(x, "/", dirsep)
+  return DIR .. x
+end
+
+-- prepend DIR and pospend proper C lib. extension to a name
+local function DC (x)
+  local ext = (dirsep == '\\') and ".dll" or ".so"
+  return D(x .. ext)
+end
+
+
+local function createfiles (files, preextras, posextras)
+  for n,c in pairs(files) do
+    io.output(D(n))
+    io.write(string.format(preextras, n))
+    io.write(c)
+    io.write(string.format(posextras, n))
+    io.close(io.output())
+  end
+end
+
+function removefiles (files)
+  for n in pairs(files) do
+    os.remove(D(n))
+  end
+end
+
+local files = {
+  ["names.lua"] = "do return {...} end\n",
+  ["err.lua"] = "B = 15; a = a + 1;",
+  ["A.lua"] = "",
+  ["B.lua"] = "assert(...=='B');require 'A'",
+  ["A.lc"] = "",
+  ["A"] = "",
+  ["L"] = "",
+  ["XXxX"] = "",
+  ["C.lua"] = "package.loaded[...] = 25; require'C'"
+}
+
+AA = nil
+local extras = [[
+NAME = '%s'
+REQUIRED = ...
+return AA]]
+
+createfiles(files, "", extras)
+
+-- testing explicit "dir" separator in 'searchpath'
+assert(package.searchpath("C.lua", D"?", "", "") == D"C.lua")
+assert(package.searchpath("C.lua", D"?", ".", ".") == D"C.lua")
+assert(package.searchpath("--x-", D"?", "-", "X") == D"XXxX")
+assert(package.searchpath("---xX", D"?", "---", "XX") == D"XXxX")
+assert(package.searchpath(D"C.lua", "?", dirsep) == D"C.lua")
+assert(package.searchpath(".\\C.lua", D"?", "\\") == D"./C.lua")
+
+local oldpath = package.path
+
+package.path = string.gsub("D/?.lua;D/?.lc;D/?;D/??x?;D/L", "D/", DIR)
+
+local try = function (p, n, r)
+  NAME = nil
+  local rr = require(p)
+  assert(NAME == n)
+  assert(REQUIRED == p)
+  assert(rr == r)
+end
+
+a = require"names"
+assert(a[1] == "names" and a[2] == D"names.lua")
+
+_G.a = nil
+assert(not pcall(require, "err"))
+assert(B == 15)
+
+assert(package.searchpath("C", package.path) == D"C.lua")
+assert(require"C" == 25)
+assert(require"C" == 25)
+AA = nil
+try('B', 'B.lua', true)
+assert(package.loaded.B)
+assert(require"B" == true)
+assert(package.loaded.A)
+assert(require"C" == 25)
+package.loaded.A = nil
+try('B', nil, true)   -- should not reload package
+try('A', 'A.lua', true)
+package.loaded.A = nil
+os.remove(D'A.lua')
+AA = {}
+try('A', 'A.lc', AA)  -- now must find second option
+assert(package.searchpath("A", package.path) == D"A.lc")
+assert(require("A") == AA)
+AA = false
+try('K', 'L', false)     -- default option
+try('K', 'L', false)     -- default option (should reload it)
+assert(rawget(_G, "_REQUIREDNAME") == nil)
+
+AA = "x"
+try("X", "XXxX", AA)
+
+
+removefiles(files)
+
+
+-- testing require of sub-packages
+
+local _G = _G
+
+package.path = string.gsub("D/?.lua;D/?/init.lua", "D/", DIR)
+
+files = {
+  ["P1/init.lua"] = "AA = 10",
+  ["P1/xuxu.lua"] = "AA = 20",
+}
+
+createfiles(files, "_ENV = {}\n", "\nreturn _ENV\n")
+AA = 0
+
+local m = assert(require"P1")
+assert(AA == 0 and m.AA == 10)
+assert(require"P1" == m)
+assert(require"P1" == m)
+
+assert(package.searchpath("P1.xuxu", package.path) == D"P1/xuxu.lua")
+m.xuxu = assert(require"P1.xuxu")
+assert(AA == 0 and m.xuxu.AA == 20)
+assert(require"P1.xuxu" == m.xuxu)
+assert(require"P1.xuxu" == m.xuxu)
+assert(require"P1" == m and m.AA == 10)
+
+
+removefiles(files)
+
+
+package.path = ""
+assert(not pcall(require, "file_does_not_exist"))
+package.path = "??\0?"
+assert(not pcall(require, "file_does_not_exist1"))
+
+package.path = oldpath
+
+-- check 'require' error message
+local fname = "file_does_not_exist2"
+local m, err = pcall(require, fname)
+for t in string.gmatch(package.path..";"..package.cpath, "[^;]+") do
+  t = string.gsub(t, "?", fname)
+  assert(string.find(err, t, 1, true))
+end
+
+do  -- testing 'package.searchers' not being a table
+  local searchers = package.searchers
+  package.searchers = 3
+  local st, msg = pcall(require, 'a')
+  assert(not st and string.find(msg, "must be a table"))
+  package.searchers = searchers
+end
+
+local function import(...)
+  local f = {...}
+  return function (m)
+    for i=1, #f do m[f[i]] = _G[f[i]] end
+  end
+end
+
+-- cannot change environment of a C function
+assert(not pcall(module, 'XUXU'))
+
+
+
+-- testing require of C libraries
+
+
+local p = ""   -- On Mac OS X, redefine this to "_"
+
+-- check whether loadlib works in this system
+local st, err, when = package.loadlib(DC"lib1", "*")
+if not st then
+  local f, err, when = package.loadlib("donotexist", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "absent")
+  ;(Message or print)('\n >>> cannot load dynamic library <<<\n')
+  print(err, when)
+else
+  -- tests for loadlib
+  local f = assert(package.loadlib(DC"lib1", p.."onefunction"))
+  local a, b = f(15, 25)
+  assert(a == 25 and b == 15)
+
+  f = assert(package.loadlib(DC"lib1", p.."anotherfunc"))
+  assert(f(10, 20) == "10%20\n")
+
+  -- check error messages
+  local f, err, when = package.loadlib(DC"lib1", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "init")
+  f, err, when = package.loadlib("donotexist", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "open")
+
+  -- symbols from 'lib1' must be visible to other libraries
+  f = assert(package.loadlib(DC"lib11", p.."luaopen_lib11"))
+  assert(f() == "exported")
+
+  -- test C modules with prefixes in names
+  package.cpath = DC"?"
+  local lib2 = require"lib2-v2"
+  -- check correct access to global environment and correct
+  -- parameters
+  assert(_ENV.x == "lib2-v2" and _ENV.y == DC"lib2-v2")
+  assert(lib2.id("x") == "x")
+
+  -- test C submodules
+  local fs = require"lib1.sub"
+  assert(_ENV.x == "lib1.sub" and _ENV.y == DC"lib1")
+  assert(fs.id(45) == 45)
+end
+
+_ENV = _G
+
+
+-- testing preload
+
+do
+  local p = package
+  package = {}
+  p.preload.pl = function (...)
+    local _ENV = {...}
+    function xuxu (x) return x+20 end
+    return _ENV
+  end
+
+  local pl = require"pl"
+  assert(require"pl" == pl)
+  assert(pl.xuxu(10) == 30)
+  assert(pl[1] == "pl" and pl[2] == nil)
+
+  package = p
+  assert(type(package.path) == "string")
+end
+
+print('+')
+
+end  --]
+
+print("testing assignments, logical operators, and constructors")
+
+local res, res2 = 27
+
+a, b = 1, 2+3
+assert(a==1 and b==5)
+a={}
+function f() return 10, 11, 12 end
+a.x, b, a[1] = 1, 2, f()
+assert(a.x==1 and b==2 and a[1]==10)
+a[f()], b, a[f()+3] = f(), a, 'x'
+assert(a[10] == 10 and b == a and a[13] == 'x')
+
+do
+  local f = function (n) local x = {}; for i=1,n do x[i]=i end;
+                         return table.unpack(x) end;
+  local a,b,c
+  a,b = 0, f(1)
+  assert(a == 0 and b == 1)
+  A,b = 0, f(1)
+  assert(A == 0 and b == 1)
+  a,b,c = 0,5,f(4)
+  assert(a==0 and b==5 and c==1)
+  a,b,c = 0,5,f(0)
+  assert(a==0 and b==5 and c==nil)
+end
+
+a, b, c, d = 1 and nil, 1 or nil, (1 and (nil or 1)), 6
+assert(not a and b and c and d==6)
+
+d = 20
+a, b, c, d = f()
+assert(a==10 and b==11 and c==12 and d==nil)
+a,b = f(), 1, 2, 3, f()
+assert(a==10 and b==1)
+
+assert(a<b == false and a>b == true)
+assert((10 and 2) == 2)
+assert((10 or 2) == 10)
+assert((10 or assert(nil)) == 10)
+assert(not (nil and assert(nil)))
+assert((nil or "alo") == "alo")
+assert((nil and 10) == nil)
+assert((false and 10) == false)
+assert((true or 10) == true)
+assert((false or 10) == 10)
+assert(false ~= nil)
+assert(nil ~= false)
+assert(not nil == true)
+assert(not not nil == false)
+assert(not not 1 == true)
+assert(not not a == true)
+assert(not not (6 or nil) == true)
+assert(not not (nil and 56) == false)
+assert(not not (nil and true) == false)
+
+assert({} ~= {})
+print('+')
+
+a = {}
+a[true] = 20
+a[false] = 10
+assert(a[1<2] == 20 and a[1>2] == 10)
+
+function f(a) return a end
+
+local a = {}
+for i=3000,-3000,-1 do a[i + 0.0] = i; end
+a[10e30] = "alo"; a[true] = 10; a[false] = 20
+assert(a[10e30] == 'alo' and a[not 1] == 20 and a[10<20] == 10)
+for i=3000,-3000,-1 do assert(a[i] == i); end
+a[print] = assert
+a[f] = print
+a[a] = a
+assert(a[a][a][a][a][print] == assert)
+a[print](a[a[f]] == a[print])
+assert(not pcall(function () local a = {}; a[nil] = 10 end))
+assert(not pcall(function () local a = {[nil] = 10} end))
+assert(a[nil] == nil)
+a = nil
+
+a = {10,9,8,7,6,5,4,3,2; [-3]='a', [f]=print, a='a', b='ab'}
+a, a.x, a.y = a, a[-3]
+assert(a[1]==10 and a[-3]==a.a and a[f]==print and a.x=='a' and not a.y)
+a[1], f(a)[2], b, c = {['alo']=assert}, 10, a[1], a[f], 6, 10, 23, f(a), 2
+a[1].alo(a[2]==10 and b==10 and c==print)
+
+
+-- test of large float/integer indices 
+
+-- compute maximum integer where all bits fit in a float
+local maxint = math.maxinteger
+
+while maxint - 1.0 == maxint - 0.0 do   -- trim (if needed) to fit in a float
+  maxint = maxint // 2
+end
+
+maxintF = maxint + 0.0   -- float version
+
+assert(math.type(maxintF) == "float" and maxintF >= 2.0^14)
+
+-- floats and integers must index the same places
+a[maxintF] = 10; a[maxintF - 1.0] = 11;
+a[-maxintF] = 12; a[-maxintF + 1.0] = 13;
+
+assert(a[maxint] == 10 and a[maxint - 1] == 11 and
+       a[-maxint] == 12 and a[-maxint + 1] == 13)
+
+a[maxint] = 20
+a[-maxint] = 22
+
+assert(a[maxintF] == 20 and a[maxintF - 1.0] == 11 and
+       a[-maxintF] == 22 and a[-maxintF + 1.0] == 13)
+
+a = nil
+
+
+-- test conflicts in multiple assignment
+do
+  local a,i,j,b
+  a = {'a', 'b'}; i=1; j=2; b=a
+  i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
+  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
+         b[3] == 1)
+end
+
+-- repeat test with upvalues
+do
+  local a,i,j,b
+  a = {'a', 'b'}; i=1; j=2; b=a
+  local function foo ()
+    i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
+  end
+  foo()
+  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
+         b[3] == 1)
+  local t = {}
+  (function (a) t[a], a = 10, 20  end)(1);
+  assert(t[1] == 10)
+end
+
+-- bug in 5.2 beta
+local function foo ()
+  local a
+  return function ()
+    local b
+    a, b = 3, 14    -- local and upvalue have same index
+    return a, b
+  end
+end
+
+local a, b = foo()()
+assert(a == 3 and b == 14)
+
+print('OK')
+
+return res
+
diff --git a/lua-5.3.1-tests/big.lua b/lua-5.3.1-tests/big.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/big.lua
@@ -0,0 +1,81 @@
+-- $Id: big.lua,v 1.31 2014/12/26 17:20:53 roberto Exp $
+
+if _soft then
+  return 'a'
+end
+
+print "testing large tables"
+
+local debug = require"debug" 
+
+local lim = 2^18 + 1000
+local prog = { "local y = {0" }
+for i = 1, lim do prog[#prog + 1] = i  end
+prog[#prog + 1] = "}\n"
+prog[#prog + 1] = "X = y\n"
+prog[#prog + 1] = ("assert(X[%d] == %d)"):format(lim - 1, lim - 2)
+prog[#prog + 1] = "return 0"
+prog = table.concat(prog, ";")
+
+local env = {string = string, assert = assert}
+local f = assert(load(prog, nil, nil, env))
+
+f()
+assert(env.X[lim] == lim - 1 and env.X[lim + 1] == lim)
+for k in pairs(env) do env[k] = nil end
+
+-- yields during accesses larger than K (in RK)
+setmetatable(env, {
+  __index = function (t, n) coroutine.yield('g'); return _G[n] end,
+  __newindex = function (t, n, v) coroutine.yield('s'); _G[n] = v end,
+})
+
+X = nil
+co = coroutine.wrap(f)
+assert(co() == 's')
+assert(co() == 'g')
+assert(co() == 'g')
+assert(co() == 0)
+
+assert(X[lim] == lim - 1 and X[lim + 1] == lim)
+
+-- errors in accesses larger than K (in RK)
+getmetatable(env).__index = function () end
+getmetatable(env).__newindex = function () end
+local e, m = pcall(f)
+assert(not e and m:find("global 'X'"))
+
+-- errors in metamethods 
+getmetatable(env).__newindex = function () error("hi") end
+local e, m = xpcall(f, debug.traceback)
+assert(not e and m:find("'__newindex'"))
+
+f, X = nil
+
+coroutine.yield'b'
+
+if 2^32 == 0 then   -- (small integers) {   
+
+print "testing string length overflow"
+
+local repstrings = 192          -- number of strings to be concatenated
+local ssize = math.ceil(2.0^32 / repstrings) + 1   -- size of each string
+
+assert(repstrings * ssize > 2.0^32)  -- it should be larger than maximum size
+
+local longs = string.rep("\0", ssize)   -- create one long string
+
+-- create function to concatentate 'repstrings' copies of its argument
+local rep = assert(load(
+  "local a = ...; return " .. string.rep("a", repstrings, "..")))
+
+local a, b = pcall(rep, longs)   -- call that function
+
+-- it should fail without creating string (result would be too large)
+assert(not a and string.find(b, "overflow"))
+
+end   -- }
+
+print'OK'
+
+return 'a'
diff --git a/lua-5.3.1-tests/bitwise.lua b/lua-5.3.1-tests/bitwise.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/bitwise.lua
@@ -0,0 +1,327 @@
+-- $Id: bitwise.lua,v 1.25 2015/04/30 14:15:57 roberto Exp $
+
+print("testing bitwise operations")
+
+local numbits = string.packsize('j') * 8
+
+assert(~0 == -1)
+
+assert((1 << (numbits - 1)) == math.mininteger)
+
+-- basic tests for bitwise operators;
+-- use variables to avoid constant folding
+local a, b, c, d
+a = 0xFFFFFFFFFFFFFFFF
+assert(a == -1 and a & -1 == a and a & 35 == 35)
+a = 0xF0F0F0F0F0F0F0F0
+assert(a | -1 == -1)
+assert(a ~ a == 0 and a ~ 0 == a and a ~ ~a == -1)
+assert(a >> 4 == ~a)
+a = 0xF0; b = 0xCC; c = 0xAA; d = 0xFD
+assert(a | b ~ c & d == 0xF4)
+
+a = 0xF0.0; b = 0xCC.0; c = "0xAA.0"; d = "0xFD.0"
+assert(a | b ~ c & d == 0xF4)
+
+a = 0xF0000000; b = 0xCC000000;
+c = 0xAA000000; d = 0xFD000000
+assert(a | b ~ c & d == 0xF4000000)
+assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
+
+a = a << 32
+b = b << 32
+c = c << 32
+d = d << 32
+assert(a | b ~ c & d == 0xF4000000 << 32)
+assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
+
+assert(-1 >> 1 == (1 << (numbits - 1)) - 1 and 1 << 31 == 0x80000000)
+assert(-1 >> (numbits - 1) == 1)
+assert(-1 >> numbits == 0 and
+       -1 >> -numbits == 0 and
+       -1 << numbits == 0 and
+       -1 << -numbits == 0)
+
+assert((2^30 - 1) << 2^30 == 0)
+assert((2^30 - 1) >> 2^30 == 0)
+
+assert(1 >> -3 == 1 << 3 and 1000 >> 5 == 1000 << -5)
+
+
+-- coercion from strings to integers
+assert("0xffffffffffffffff" | 0 == -1)
+assert("0xfffffffffffffffe" & "-1" == -2)
+assert(" \t-0xfffffffffffffffe\n\t" & "-1" == 2)
+assert("   \n  -45  \t " >> "  -2  " == -45 * 4)
+
+-- out of range number
+assert(not pcall(function () return "0xffffffffffffffff.0" | 0 end))
+
+-- embedded zeros
+assert(not pcall(function () return "0xffffffffffffffff\0" | 0 end))
+
+print'+'
+
+
+package.preload.bit32 = function ()     --{
+
+-- no built-in 'bit32' library: implement it using bitwise operators
+
+local bit = {}
+
+function bit.bnot (a)
+  return ~a & 0xFFFFFFFF
+end
+
+
+--
+-- in all vararg functions, avoid creating 'arg' table when there are
+-- only 2 (or less) parameters, as 2 parameters is the common case
+--
+
+function bit.band (x, y, z, ...)
+  if not z then
+    return ((x or -1) & (y or -1)) & 0xFFFFFFFF
+  else
+    local arg = {...}
+    local res = x & y & z
+    for i = 1, #arg do res = res & arg[i] end
+    return res & 0xFFFFFFFF
+  end
+end
+
+function bit.bor (x, y, z, ...)
+  if not z then
+    return ((x or 0) | (y or 0)) & 0xFFFFFFFF
+  else
+    local arg = {...}
+    local res = x | y | z
+    for i = 1, #arg do res = res | arg[i] end
+    return res & 0xFFFFFFFF
+  end
+end
+
+function bit.bxor (x, y, z, ...)
+  if not z then
+    return ((x or 0) ~ (y or 0)) & 0xFFFFFFFF
+  else
+    local arg = {...}
+    local res = x ~ y ~ z
+    for i = 1, #arg do res = res ~ arg[i] end
+    return res & 0xFFFFFFFF
+  end
+end
+
+function bit.btest (...)
+  return bit.band(...) ~= 0
+end
+
+function bit.lshift (a, b)
+  return ((a & 0xFFFFFFFF) << b) & 0xFFFFFFFF
+end
+
+function bit.rshift (a, b)
+  return ((a & 0xFFFFFFFF) >> b) & 0xFFFFFFFF
+end
+
+function bit.arshift (a, b)
+  a = a & 0xFFFFFFFF
+  if b <= 0 or (a & 0x80000000) == 0 then
+    return (a >> b) & 0xFFFFFFFF
+  else
+    return ((a >> b) | ~(0xFFFFFFFF >> b)) & 0xFFFFFFFF
+  end
+end
+
+function bit.lrotate (a ,b)
+  b = b & 31
+  a = a & 0xFFFFFFFF
+  a = (a << b) | (a >> (32 - b))
+  return a & 0xFFFFFFFF
+end
+
+function bit.rrotate (a, b)
+  return bit.lrotate(a, -b)
+end
+
+local function checkfield (f, w)
+  w = w or 1
+  assert(f >= 0, "field cannot be negative")
+  assert(w > 0, "width must be positive")
+  assert(f + w <= 32, "trying to access non-existent bits")
+  return f, ~(-1 << w)
+end
+
+function bit.extract (a, f, w)
+  local f, mask = checkfield(f, w)
+  return (a >> f) & mask
+end
+
+function bit.replace (a, v, f, w)
+  local f, mask = checkfield(f, w)
+  v = v & mask
+  a = (a & ~(mask << f)) | (v << f)
+  return a & 0xFFFFFFFF
+end
+
+return bit
+
+end  --}
+
+
+print("testing bitwise library")
+
+local bit32 = require'bit32'
+
+assert(bit32.band() == bit32.bnot(0))
+assert(bit32.btest() == true)
+assert(bit32.bor() == 0)
+assert(bit32.bxor() == 0)
+
+assert(bit32.band() == bit32.band(0xffffffff))
+assert(bit32.band(1,2) == 0)
+
+
+-- out-of-range numbers
+assert(bit32.band(-1) == 0xffffffff)
+assert(bit32.band((1 << 33) - 1) == 0xffffffff)
+assert(bit32.band(-(1 << 33) - 1) == 0xffffffff)
+assert(bit32.band((1 << 33) + 1) == 1)
+assert(bit32.band(-(1 << 33) + 1) == 1)
+assert(bit32.band(-(1 << 40)) == 0)
+assert(bit32.band(1 << 40) == 0)
+assert(bit32.band(-(1 << 40) - 2) == 0xfffffffe)
+assert(bit32.band((1 << 40) - 4) == 0xfffffffc)
+
+assert(bit32.lrotate(0, -1) == 0)
+assert(bit32.lrotate(0, 7) == 0)
+assert(bit32.lrotate(0x12345678, 0) == 0x12345678)
+assert(bit32.lrotate(0x12345678, 32) == 0x12345678)
+assert(bit32.lrotate(0x12345678, 4) == 0x23456781)
+assert(bit32.rrotate(0x12345678, -4) == 0x23456781)
+assert(bit32.lrotate(0x12345678, -8) == 0x78123456)
+assert(bit32.rrotate(0x12345678, 8) == 0x78123456)
+assert(bit32.lrotate(0xaaaaaaaa, 2) == 0xaaaaaaaa)
+assert(bit32.lrotate(0xaaaaaaaa, -2) == 0xaaaaaaaa)
+for i = -50, 50 do
+  assert(bit32.lrotate(0x89abcdef, i) == bit32.lrotate(0x89abcdef, i%32))
+end
+
+assert(bit32.lshift(0x12345678, 4) == 0x23456780)
+assert(bit32.lshift(0x12345678, 8) == 0x34567800)
+assert(bit32.lshift(0x12345678, -4) == 0x01234567)
+assert(bit32.lshift(0x12345678, -8) == 0x00123456)
+assert(bit32.lshift(0x12345678, 32) == 0)
+assert(bit32.lshift(0x12345678, -32) == 0)
+assert(bit32.rshift(0x12345678, 4) == 0x01234567)
+assert(bit32.rshift(0x12345678, 8) == 0x00123456)
+assert(bit32.rshift(0x12345678, 32) == 0)
+assert(bit32.rshift(0x12345678, -32) == 0)
+assert(bit32.arshift(0x12345678, 0) == 0x12345678)
+assert(bit32.arshift(0x12345678, 1) == 0x12345678 // 2)
+assert(bit32.arshift(0x12345678, -1) == 0x12345678 * 2)
+assert(bit32.arshift(-1, 1) == 0xffffffff)
+assert(bit32.arshift(-1, 24) == 0xffffffff)
+assert(bit32.arshift(-1, 32) == 0xffffffff)
+assert(bit32.arshift(-1, -1) == bit32.band(-1 * 2, 0xffffffff))
+
+assert(0x12345678 << 4 == 0x123456780)
+assert(0x12345678 << 8 == 0x1234567800)
+assert(0x12345678 << -4 == 0x01234567)
+assert(0x12345678 << -8 == 0x00123456)
+assert(0x12345678 << 32 == 0x1234567800000000)
+assert(0x12345678 << -32 == 0)
+assert(0x12345678 >> 4 == 0x01234567)
+assert(0x12345678 >> 8 == 0x00123456)
+assert(0x12345678 >> 32 == 0)
+assert(0x12345678 >> -32 == 0x1234567800000000)
+
+print("+")
+-- some special cases
+local c = {0, 1, 2, 3, 10, 0x80000000, 0xaaaaaaaa, 0x55555555,
+           0xffffffff, 0x7fffffff}
+
+for _, b in pairs(c) do
+  assert(bit32.band(b) == b)
+  assert(bit32.band(b, b) == b)
+  assert(bit32.band(b, b, b, b) == b)
+  assert(bit32.btest(b, b) == (b ~= 0))
+  assert(bit32.band(b, b, b) == b)
+  assert(bit32.band(b, b, b, ~b) == 0)
+  assert(bit32.btest(b, b, b) == (b ~= 0))
+  assert(bit32.band(b, bit32.bnot(b)) == 0)
+  assert(bit32.bor(b, bit32.bnot(b)) == bit32.bnot(0))
+  assert(bit32.bor(b) == b)
+  assert(bit32.bor(b, b) == b)
+  assert(bit32.bor(b, b, b) == b)
+  assert(bit32.bor(b, b, 0, ~b) == 0xffffffff)
+  assert(bit32.bxor(b) == b)
+  assert(bit32.bxor(b, b) == 0)
+  assert(bit32.bxor(b, b, b) == b)
+  assert(bit32.bxor(b, b, b, b) == 0)
+  assert(bit32.bxor(b, 0) == b)
+  assert(bit32.bnot(b) ~= b)
+  assert(bit32.bnot(bit32.bnot(b)) == b)
+  assert(bit32.bnot(b) == (1 << 32) - 1 - b)
+  assert(bit32.lrotate(b, 32) == b)
+  assert(bit32.rrotate(b, 32) == b)
+  assert(bit32.lshift(bit32.lshift(b, -4), 4) == bit32.band(b, bit32.bnot(0xf)))
+  assert(bit32.rshift(bit32.rshift(b, 4), -4) == bit32.band(b, bit32.bnot(0xf)))
+end
+
+-- for this test, use at most 24 bits (mantissa of a single float)
+c = {0, 1, 2, 3, 10, 0x800000, 0xaaaaaa, 0x555555, 0xffffff, 0x7fffff}
+for _, b in pairs(c) do
+  for i = -40, 40 do
+    local x = bit32.lshift(b, i)
+    local y = math.floor(math.fmod(b * 2.0^i, 2.0^32))
+    assert(math.fmod(x - y, 2.0^32) == 0)
+  end
+end
+
+assert(not pcall(bit32.band, {}))
+assert(not pcall(bit32.bnot, "a"))
+assert(not pcall(bit32.lshift, 45))
+assert(not pcall(bit32.lshift, 45, print))
+assert(not pcall(bit32.rshift, 45, print))
+
+print("+")
+
+
+-- testing extract/replace
+
+assert(bit32.extract(0x12345678, 0, 4) == 8)
+assert(bit32.extract(0x12345678, 4, 4) == 7)
+assert(bit32.extract(0xa0001111, 28, 4) == 0xa)
+assert(bit32.extract(0xa0001111, 31, 1) == 1)
+assert(bit32.extract(0x50000111, 31, 1) == 0)
+assert(bit32.extract(0xf2345679, 0, 32) == 0xf2345679)
+
+assert(not pcall(bit32.extract, 0, -1))
+assert(not pcall(bit32.extract, 0, 32))
+assert(not pcall(bit32.extract, 0, 0, 33))
+assert(not pcall(bit32.extract, 0, 31, 2))
+
+assert(bit32.replace(0x12345678, 5, 28, 4) == 0x52345678)
+assert(bit32.replace(0x12345678, 0x87654321, 0, 32) == 0x87654321)
+assert(bit32.replace(0, 1, 2) == 2^2)
+assert(bit32.replace(0, -1, 4) == 2^4)
+assert(bit32.replace(-1, 0, 31) == (1 << 31) - 1)
+assert(bit32.replace(-1, 0, 1, 2) == (1 << 32) - 7)
+
+
+-- testing conversion of floats
+
+assert(bit32.bor(3.0) == 3)
+assert(bit32.bor(-4.0) == 0xfffffffc)
+
+-- large floats and large-enough integers?
+if 2.0^50 < 2.0^50 + 1.0 and 2.0^50 < (-1 >> 1) then
+  assert(bit32.bor(2.0^32 - 5.0) == 0xfffffffb)
+  assert(bit32.bor(-2.0^32 - 6.0) == 0xfffffffa)
+  assert(bit32.bor(2.0^48 - 5.0) == 0xfffffffb)
+  assert(bit32.bor(-2.0^48 - 6.0) == 0xfffffffa)
+end
+
+print'OK'
+
diff --git a/lua-5.3.1-tests/calls.lua b/lua-5.3.1-tests/calls.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/calls.lua
@@ -0,0 +1,389 @@
+-- $Id: calls.lua,v 1.57 2015/03/04 13:09:38 roberto Exp $
+
+print("testing functions and calls")
+
+local debug = require "debug"
+
+-- get the opportunity to test 'type' too ;)
+
+assert(type(1<2) == 'boolean')
+assert(type(true) == 'boolean' and type(false) == 'boolean')
+assert(type(nil) == 'nil'
+   and type(-3) == 'number'
+   and type'x' == 'string'
+   and type{} == 'table'
+   and type(type) == 'function')
+
+assert(type(assert) == type(print))
+function f (x) return a:x (x) end
+assert(type(f) == 'function')
+
+
+do    -- test error in 'print' too...
+  local tostring = _ENV.tostring
+
+  _ENV.tostring = nil
+  local st, msg = pcall(print, 1)
+  assert(st == false and string.find(msg, "attempt to call a nil value"))
+
+  _ENV.tostring = function () return {} end
+  local st, msg = pcall(print, 1)
+  assert(st == false and string.find(msg, "must return a string"))
+  
+  _ENV.tostring = tostring
+end
+
+
+-- testing local-function recursion
+fact = false
+do
+  local res = 1
+  local function fact (n)
+    if n==0 then return res
+    else return n*fact(n-1)
+    end
+  end
+  assert(fact(5) == 120)
+end
+assert(fact == false)
+
+-- testing declarations
+a = {i = 10}
+self = 20
+function a:x (x) return x+self.i end
+function a.y (x) return x+self end
+
+assert(a:x(1)+10 == a.y(1))
+
+a.t = {i=-100}
+a["t"].x = function (self, a,b) return self.i+a+b end
+
+assert(a.t:x(2,3) == -95)
+
+do
+  local a = {x=0}
+  function a:add (x) self.x, a.y = self.x+x, 20; return self end
+  assert(a:add(10):add(20):add(30).x == 60 and a.y == 20)
+end
+
+local a = {b={c={}}}
+
+function a.b.c.f1 (x) return x+1 end
+function a.b.c:f2 (x,y) self[x] = y end
+assert(a.b.c.f1(4) == 5)
+a.b.c:f2('k', 12); assert(a.b.c.k == 12)
+
+print('+')
+
+t = nil   -- 'declare' t
+function f(a,b,c) local d = 'a'; t={a,b,c,d} end
+
+f(      -- this line change must be valid
+  1,2)
+assert(t[1] == 1 and t[2] == 2 and t[3] == nil and t[4] == 'a')
+f(1,2,   -- this one too
+      3,4)
+assert(t[1] == 1 and t[2] == 2 and t[3] == 3 and t[4] == 'a')
+
+function fat(x)
+  if x <= 1 then return 1
+  else return x*load("return fat(" .. x-1 .. ")", "")()
+  end
+end
+
+assert(load "load 'assert(fat(6)==720)' () ")()
+a = load('return fat(5), 3')
+a,b = a()
+assert(a == 120 and b == 3)
+print('+')
+
+function err_on_n (n)
+  if n==0 then error(); exit(1);
+  else err_on_n (n-1); exit(1);
+  end
+end
+
+do
+  function dummy (n)
+    if n > 0 then
+      assert(not pcall(err_on_n, n))
+      dummy(n-1)
+    end
+  end
+end
+
+dummy(10)
+
+function deep (n)
+  if n>0 then deep(n-1) end
+end
+deep(10)
+deep(200)
+
+-- testing tail call
+function deep (n) if n>0 then return deep(n-1) else return 101 end end
+assert(deep(30000) == 101)
+a = {}
+function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
+assert(a:deep(30000) == 101)
+
+print('+')
+
+
+a = nil
+(function (x) a=x end)(23)
+assert(a == 23 and (function (x) return x*2 end)(20) == 40)
+
+
+-- testing closures
+
+-- fixed-point operator
+Z = function (le)
+      local function a (f)
+        return le(function (x) return f(f)(x) end)
+      end
+      return a(a)
+    end
+
+
+-- non-recursive factorial
+
+F = function (f)
+      return function (n)
+               if n == 0 then return 1
+               else return n*f(n-1) end
+             end
+    end
+
+fat = Z(F)
+
+assert(fat(0) == 1 and fat(4) == 24 and Z(F)(5)==5*Z(F)(4))
+
+local function g (z)
+  local function f (a,b,c,d)
+    return function (x,y) return a+b+c+d+a+x+y+z end
+  end
+  return f(z,z+1,z+2,z+3)
+end
+
+f = g(10)
+assert(f(9, 16) == 10+11+12+13+10+9+16+10)
+
+Z, F, f = nil
+print('+')
+
+-- testing multiple returns
+
+function unlpack (t, i)
+  i = i or 1
+  if (i <= #t) then
+    return t[i], unlpack(t, i+1)
+  end
+end
+
+function equaltab (t1, t2)
+  assert(#t1 == #t2)
+  for i = 1, #t1 do
+    assert(t1[i] == t2[i])
+  end
+end
+
+local pack = function (...) return (table.pack(...)) end
+
+function f() return 1,2,30,4 end
+function ret2 (a,b) return a,b end
+
+local a,b,c,d = unlpack{1,2,3}
+assert(a==1 and b==2 and c==3 and d==nil)
+a = {1,2,3,4,false,10,'alo',false,assert}
+equaltab(pack(unlpack(a)), a)
+equaltab(pack(unlpack(a), -1), {1,-1})
+a,b,c,d = ret2(f()), ret2(f())
+assert(a==1 and b==1 and c==2 and d==nil)
+a,b,c,d = unlpack(pack(ret2(f()), ret2(f())))
+assert(a==1 and b==1 and c==2 and d==nil)
+a,b,c,d = unlpack(pack(ret2(f()), (ret2(f()))))
+assert(a==1 and b==1 and c==nil and d==nil)
+
+a = ret2{ unlpack{1,2,3}, unlpack{3,2,1}, unlpack{"a", "b"}}
+assert(a[1] == 1 and a[2] == 3 and a[3] == "a" and a[4] == "b")
+
+
+-- testing calls with 'incorrect' arguments
+rawget({}, "x", 1)
+rawset({}, "x", 1, 2)
+assert(math.sin(1,2) == math.sin(1))
+table.sort({10,9,8,4,19,23,0,0}, function (a,b) return a<b end, "extra arg")
+
+
+-- test for generic load
+local x = "-- a comment\0\0\0\n  x = 10 + \n23; \
+     local a = function () x = 'hi' end; \
+     return '\0'"
+function read1 (x)
+  local i = 0
+  return function ()
+    collectgarbage()
+    i=i+1
+    return string.sub(x, i, i)
+  end
+end
+
+function cannotload (msg, a,b)
+  assert(not a and string.find(b, msg))
+end
+
+a = assert(load(read1(x), "modname", "t", _G))
+assert(a() == "\0" and _G.x == 33)
+assert(debug.getinfo(a).source == "modname")
+-- cannot read text in binary mode
+cannotload("attempt to load a text chunk", load(read1(x), "modname", "b", {}))
+cannotload("attempt to load a text chunk", load(x, "modname", "b"))
+
+a = assert(load(function () return nil end))
+a()  -- empty chunk
+
+assert(not load(function () return true end))
+
+
+-- small bug
+local t = {nil, "return ", "3"}
+f, msg = load(function () return table.remove(t, 1) end)
+assert(f() == nil)   -- should read the empty chunk
+
+-- another small bug (in 5.2.1)
+f = load(string.dump(function () return 1 end), nil, "b", {})
+assert(type(f) == "function" and f() == 1)
+
+
+x = string.dump(load("x = 1; return x"))
+a = assert(load(read1(x), nil, "b"))
+assert(a() == 1 and _G.x == 1)
+cannotload("attempt to load a binary chunk", load(read1(x), nil, "t"))
+cannotload("attempt to load a binary chunk", load(x, nil, "t"))
+
+assert(not pcall(string.dump, print))  -- no dump of C functions
+
+cannotload("unexpected symbol", load(read1("*a = 123")))
+cannotload("unexpected symbol", load("*a = 123"))
+cannotload("hhi", load(function () error("hhi") end))
+
+-- any value is valid for _ENV
+assert(load("return _ENV", nil, nil, 123)() == 123)
+
+
+-- load when _ENV is not first upvalue
+local x; XX = 123
+local function h ()
+  local y=x   -- use 'x', so that it becomes 1st upvalue
+  return XX   -- global name
+end
+local d = string.dump(h)
+x = load(d, "", "b")
+assert(debug.getupvalue(x, 2) == '_ENV')
+debug.setupvalue(x, 2, _G)
+assert(x() == 123)
+
+assert(assert(load("return XX + ...", nil, nil, {XX = 13}))(4) == 17)
+
+
+-- test generic load with nested functions
+x = [[
+  return function (x)
+    return function (y)
+     return function (z)
+       return x+y+z
+     end
+   end
+  end
+]]
+
+a = assert(load(read1(x)))
+assert(a()(2)(3)(10) == 15)
+
+
+-- test for dump/undump with upvalues
+local a, b = 20, 30
+x = load(string.dump(function (x)
+  if x == "set" then a = 10+b; b = b+1 else
+  return a
+  end
+end), "", "b", nil)
+assert(x() == nil)
+assert(debug.setupvalue(x, 1, "hi") == "a")
+assert(x() == "hi")
+assert(debug.setupvalue(x, 2, 13) == "b")
+assert(not debug.setupvalue(x, 3, 10))   -- only 2 upvalues
+x("set")
+assert(x() == 23)
+x("set")
+assert(x() == 24)
+
+-- test for dump/undump with many upvalues
+do
+  local nup = 200    -- maximum number of local variables
+  local prog = {"local a1"}
+  for i = 2, nup do prog[#prog + 1] = ", a" .. i end
+  prog[#prog + 1] = " = 1"
+  for i = 2, nup do prog[#prog + 1] = ", " .. i end
+  local sum = 1
+  prog[#prog + 1] = "; return function () return a1"
+  for i = 2, nup do prog[#prog + 1] = " + a" .. i; sum = sum + i end
+  prog[#prog + 1] = " end"
+  prog = table.concat(prog)
+  local f = assert(load(prog))()
+  assert(f() == sum)
+
+  f = load(string.dump(f))   -- main chunk now has many upvalues
+  local a = 10
+  local h = function () return a end
+  for i = 1, nup do
+    debug.upvaluejoin(f, i, h, 1)
+  end
+  assert(f() == 10 * nup)
+end
+
+-- test for bug in parameter adjustment
+assert((function () return nil end)(4) == nil)
+assert((function () local a; return a end)(4) == nil)
+assert((function (a) return a end)() == nil)
+
+
+print("testing binary chunks")
+do
+  local header = string.pack("c4BBc6BBBBBj",
+    "\27Lua",                -- signature
+    5*16 + 3,                -- version 5.3
+    0,                       -- format
+    "\x19\x93\r\n\x1a\n",    -- data
+    string.packsize("i"),    -- sizeof(int)
+    string.packsize("T"),    -- sizeof(size_t)
+    4,                       -- size of instruction
+    string.packsize("j"),    -- sizeof(lua integer)
+    string.packsize("n"),    -- sizeof(lua number)
+    0x5678                   -- LUAC_INT
+    -- LUAC_NUM may not have a unique binary representation (padding...)
+  )
+  local c = string.dump(function () local a = 1; local b = 3; return a+b*3 end)
+
+  assert(string.sub(c, 1, #header) == header)
+
+  -- corrupted header
+  for i = 1, #header do
+    local s = string.sub(c, 1, i - 1) ..
+              string.char(string.byte(string.sub(c, i, i)) + 1) ..
+              string.sub(c, i + 1, -1)
+    assert(#s == #c)
+    assert(not load(s))
+  end
+
+  -- loading truncated binary chunks
+  for i = 1, #c - 1 do
+    local st, msg = load(string.sub(c, 1, i))
+    assert(not st and string.find(msg, "truncated"))
+  end
+  assert(assert(load(c))() == 10)
+end
+
+print('OK')
+return deep
diff --git a/lua-5.3.1-tests/closure.lua b/lua-5.3.1-tests/closure.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/closure.lua
@@ -0,0 +1,246 @@
+-- $Id: closure.lua,v 1.58 2014/12/26 17:20:53 roberto Exp $
+
+print "testing closures"
+
+local A,B = 0,{g=10}
+function f(x)
+  local a = {}
+  for i=1,1000 do
+    local y = 0
+    do
+      a[i] = function () B.g = B.g+1; y = y+x; return y+A end
+    end
+  end
+  local dummy = function () return a[A] end
+  collectgarbage()
+  A = 1; assert(dummy() == a[1]); A = 0;
+  assert(a[1]() == x)
+  assert(a[3]() == x)
+  collectgarbage()
+  assert(B.g == 12)
+  return a
+end
+
+local a = f(10)
+-- force a GC in this level
+local x = {[1] = {}}   -- to detect a GC
+setmetatable(x, {__mode = 'kv'})
+while x[1] do   -- repeat until GC
+  local a = A..A..A..A  -- create garbage
+  A = A+1
+end
+assert(a[1]() == 20+A)
+assert(a[1]() == 30+A)
+assert(a[2]() == 10+A)
+collectgarbage()
+assert(a[2]() == 20+A)
+assert(a[2]() == 30+A)
+assert(a[3]() == 20+A)
+assert(a[8]() == 10+A)
+assert(getmetatable(x).__mode == 'kv')
+assert(B.g == 19)
+
+
+-- testing equality
+a = {}
+for i = 1, 5 do  a[i] = function (x) return x + a + _ENV end  end
+assert(a[3] == a[4] and a[4] == a[5])
+
+for i = 1, 5 do  a[i] = function (x) return i + a + _ENV end  end
+assert(a[3] ~= a[4] and a[4] ~= a[5])
+
+local function f()
+  return function (x)  return math.sin(_ENV[x])  end
+end
+assert(f() == f())
+
+
+-- testing closures with 'for' control variable
+a = {}
+for i=1,10 do
+  a[i] = {set = function(x) i=x end, get = function () return i end}
+  if i == 3 then break end
+end
+assert(a[4] == nil)
+a[1].set(10)
+assert(a[2].get() == 2)
+a[2].set('a')
+assert(a[3].get() == 3)
+assert(a[2].get() == 'a')
+
+a = {}
+local t = {"a", "b"}
+for i = 1, #t do
+  local k = t[i]
+  a[i] = {set = function(x, y) i=x; k=y end,
+          get = function () return i, k end}
+  if i == 2 then break end
+end
+a[1].set(10, 20)
+local r,s = a[2].get()
+assert(r == 2 and s == 'b')
+r,s = a[1].get()
+assert(r == 10 and s == 20)
+a[2].set('a', 'b')
+r,s = a[2].get()
+assert(r == "a" and s == "b")
+
+
+-- testing closures with 'for' control variable x break
+for i=1,3 do
+  f = function () return i end
+  break
+end
+assert(f() == 1)
+
+for k = 1, #t do
+  local v = t[k]
+  f = function () return k, v end
+  break
+end
+assert(({f()})[1] == 1)
+assert(({f()})[2] == "a")
+
+
+-- testing closure x break x return x errors
+
+local b
+function f(x)
+  local first = 1
+  while 1 do
+    if x == 3 and not first then return end
+    local a = 'xuxu'
+    b = function (op, y)
+          if op == 'set' then
+            a = x+y
+          else
+            return a
+          end
+        end
+    if x == 1 then do break end
+    elseif x == 2 then return
+    else if x ~= 3 then error() end
+    end
+    first = nil
+  end
+end
+
+for i=1,3 do
+  f(i)
+  assert(b('get') == 'xuxu')
+  b('set', 10); assert(b('get') == 10+i)
+  b = nil
+end
+
+pcall(f, 4);
+assert(b('get') == 'xuxu')
+b('set', 10); assert(b('get') == 14)
+
+
+local w
+-- testing multi-level closure
+function f(x)
+  return function (y)
+    return function (z) return w+x+y+z end
+  end
+end
+
+y = f(10)
+w = 1.345
+assert(y(20)(30) == 60+w)
+
+-- testing closures x repeat-until
+
+local a = {}
+local i = 1
+repeat
+  local x = i
+  a[i] = function () i = x+1; return x end
+until i > 10 or a[i]() ~= x
+assert(i == 11 and a[1]() == 1 and a[3]() == 3 and i == 4)
+
+
+-- testing closures created in 'then' and 'else' parts of 'if's
+a = {}
+for i = 1, 10 do
+  if i % 3 == 0 then
+    local y = 0
+    a[i] = function (x) local t = y; y = x; return t end
+  elseif i % 3 == 1 then
+    goto L1
+    error'not here'
+  ::L1::
+    local y = 1
+    a[i] = function (x) local t = y; y = x; return t end
+  elseif i % 3 == 2 then
+    local t
+    goto l4
+    ::l4a:: a[i] = t; goto l4b
+    error("should never be here!")
+    ::l4::
+    local y = 2
+    t = function (x) local t = y; y = x; return t end
+    goto l4a
+    error("should never be here!")
+    ::l4b::
+  end
+end
+
+for i = 1, 10 do
+  assert(a[i](i * 10) == i % 3 and a[i]() == i * 10)
+end
+
+print'+'
+
+
+-- test for correctly closing upvalues in tail calls of vararg functions
+local function t ()
+  local function c(a,b) assert(a=="test" and b=="OK") end
+  local function v(f, ...) c("test", f() ~= 1 and "FAILED" or "OK") end
+  local x = 1
+  return v(function() return x end)
+end
+t()
+
+
+-- test for debug manipulation of upvalues
+local debug = require'debug'
+
+do
+  local a , b, c = 3, 5, 7
+  foo1 = function () return a+b end;
+  foo2 = function () return b+a end;
+  do
+    local a = 10
+    foo3 = function () return a+b end;
+  end
+end
+
+assert(debug.upvalueid(foo1, 1))
+assert(debug.upvalueid(foo1, 2))
+assert(not pcall(debug.upvalueid, foo1, 3))
+assert(debug.upvalueid(foo1, 1) == debug.upvalueid(foo2, 2))
+assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo2, 1))
+assert(debug.upvalueid(foo3, 1))
+assert(debug.upvalueid(foo1, 1) ~= debug.upvalueid(foo3, 1))
+assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo3, 2))
+
+assert(debug.upvalueid(string.gmatch("x", "x"), 1) ~= nil)
+
+assert(foo1() == 3 + 5 and foo2() == 5 + 3)
+debug.upvaluejoin(foo1, 2, foo2, 2)
+assert(foo1() == 3 + 3 and foo2() == 5 + 3)
+assert(foo3() == 10 + 5)
+debug.upvaluejoin(foo3, 2, foo2, 1)
+assert(foo3() == 10 + 5)
+debug.upvaluejoin(foo3, 2, foo2, 2)
+assert(foo3() == 10 + 3)
+
+assert(not pcall(debug.upvaluejoin, foo1, 3, foo2, 1))
+assert(not pcall(debug.upvaluejoin, foo1, 1, foo2, 3))
+assert(not pcall(debug.upvaluejoin, foo1, 0, foo2, 1))
+assert(not pcall(debug.upvaluejoin, print, 1, foo2, 1))
+assert(not pcall(debug.upvaluejoin, {}, 1, foo2, 1))
+assert(not pcall(debug.upvaluejoin, foo1, 1, print, 1))
+
+print'OK'
diff --git a/lua-5.3.1-tests/code.lua b/lua-5.3.1-tests/code.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/code.lua
@@ -0,0 +1,230 @@
+-- $Id: code.lua,v 1.41 2014/12/26 17:18:43 roberto Exp $
+
+if T==nil then
+  (Message or print)('\n >>> testC not active: skipping opcode tests <<<\n')
+  return
+end
+print "testing code generation and optimizations"
+
+
+-- this code gave an error for the code checker
+do
+  local function f (a)
+  for k,v,w in a do end
+  end
+end
+
+
+-- testing reuse in constant table
+local function checkKlist (func, list)
+  local k = T.listk(func)
+  assert(#k == #list)
+  for i = 1, #k do
+    assert(k[i] == list[i] and math.type(k[i]) == math.type(list[i]))
+  end
+end
+
+local function foo ()
+  local a
+  a = 3;
+  a = 0; a = 0.0; a = -7 + 7
+  a = 3.78/4; a = 3.78/4
+  a = -3.78/4; a = 3.78/4; a = -3.78/4
+  a = -3.79/4; a = 0.0; a = -0;
+  a = 3; a = 3.0; a = 3; a = 3.0
+end
+
+checkKlist(foo, {3, 0, 0.0, 3.78/4, -3.78/4, -3.79/4, 3.0})
+
+
+-- testing opcodes
+
+function check (f, ...)
+  local arg = {...}
+  local c = T.listcode(f)
+  for i=1, #arg do
+    -- print(arg[i], c[i])
+    assert(string.find(c[i], '- '..arg[i]..' *%d'))
+  end
+  assert(c[#arg+2] == nil)
+end
+
+
+function checkequal (a, b)
+  a = T.listcode(a)
+  b = T.listcode(b)
+  for i = 1, #a do
+    a[i] = string.gsub(a[i], '%b()', '')   -- remove line number
+    b[i] = string.gsub(b[i], '%b()', '')   -- remove line number
+    assert(a[i] == b[i])
+  end
+end
+
+
+-- some basic instructions
+check(function ()
+  (function () end){f()}
+end, 'CLOSURE', 'NEWTABLE', 'GETTABUP', 'CALL', 'SETLIST', 'CALL', 'RETURN')
+
+
+-- sequence of LOADNILs
+check(function ()
+  local a,b,c
+  local d; local e;
+  local f,g,h;
+  d = nil; d=nil; b=nil; a=nil; c=nil;
+end, 'LOADNIL', 'RETURN')
+
+check(function ()
+  local a,b,c,d = 1,1,1,1
+  d=nil;c=nil;b=nil;a=nil
+end, 'LOADK', 'LOADK', 'LOADK', 'LOADK', 'LOADNIL', 'RETURN')
+
+do
+  local a,b,c,d = 1,1,1,1
+  d=nil;c=nil;b=nil;a=nil
+  assert(a == nil and b == nil and c == nil and d == nil)
+end
+
+
+-- single return
+check (function (a,b,c) return a end, 'RETURN')
+
+
+-- infinite loops
+check(function () while true do local a = -1 end end,
+'LOADK', 'JMP', 'RETURN')
+
+check(function () while 1 do local a = -1 end end,
+'LOADK', 'JMP', 'RETURN')
+
+check(function () repeat local x = 1 until true end,
+'LOADK', 'RETURN')
+
+
+-- concat optimization
+check(function (a,b,c,d) return a..b..c..d end,
+  'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN')
+
+-- not
+check(function () return not not nil end, 'LOADBOOL', 'RETURN')
+check(function () return not not false end, 'LOADBOOL', 'RETURN')
+check(function () return not not true end, 'LOADBOOL', 'RETURN')
+check(function () return not not 1 end, 'LOADBOOL', 'RETURN')
+
+-- direct access to locals
+check(function ()
+  local a,b,c,d
+  a = b*2
+  c[4], a[b] = -((a + d/-20.5 - a[b]) ^ a.x), b
+end,
+  'LOADNIL',
+  'MUL',
+  'DIV', 'ADD', 'GETTABLE', 'SUB', 'GETTABLE', 'POW',
+    'UNM', 'SETTABLE', 'SETTABLE', 'RETURN')
+
+
+-- direct access to constants
+check(function ()
+  local a,b
+  a.x = 0
+  a.x = b
+  a[b] = 'y'
+  a = 1 - a
+  b = 1/a
+  b = 5+4
+  a[true] = false
+end,
+  'LOADNIL',
+  'SETTABLE', 'SETTABLE', 'SETTABLE', 'SUB', 'DIV', 'LOADK',
+  'SETTABLE', 'RETURN')
+
+
+-- constant folding
+local function checkK (func, val)
+  check(func, 'LOADK', 'RETURN')
+  local k = T.listk(func)
+  assert(#k == 1 and k[1] == val and math.type(k[1]) == math.type(val))
+  assert(func() == val)
+end
+checkK(function () return 0.0 end, 0.0)
+checkK(function () return 0 end, 0)
+checkK(function () return -0//1 end, 0)
+checkK(function () return 3^-1 end, 1/3)
+checkK(function () return (1 + 1)^(50 + 50) end, 2^100)
+checkK(function () return (-2)^(31 - 2) end, -0x20000000 + 0.0)
+checkK(function () return (-3^0 + 5) // 3.0 end, 1.0)
+checkK(function () return -3 % 5 end, 2)
+checkK(function () return -((2.0^8 + -(-1)) % 8)/2 * 4 - 3 end, -5.0)
+checkK(function () return -((2^8 + -(-1)) % 8)//2 * 4 - 3 end, -7.0)
+checkK(function () return 0xF0.0 | 0xCC.0 ~ 0xAA & 0xFD end, 0xF4)
+checkK(function () return ~(~0xFF0 | 0xFF0) end, 0)
+checkK(function () return ~~-100024.0 end, -100024)
+checkK(function () return ((100 << 6) << -4) >> 2 end, 100)
+
+
+-- no foldings
+check(function () return -0.0 end, 'LOADK', 'UNM', 'RETURN')
+check(function () return 3/0 end, 'DIV', 'RETURN')
+check(function () return 0%0 end, 'MOD', 'RETURN')
+check(function () return -4//0 end, 'IDIV', 'RETURN')
+
+-- bug in constant folding for 5.1
+check(function () return -nil end, 'LOADNIL', 'UNM', 'RETURN')
+
+
+check(function ()
+  local a,b,c
+  b[c], a = c, b
+  b[a], a = c, b
+  a, b = c, a
+  a = a
+end, 
+  'LOADNIL',
+  'MOVE', 'MOVE', 'SETTABLE',
+  'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
+  'MOVE', 'MOVE', 'MOVE',
+  -- no code for a = a
+  'RETURN')
+
+
+-- x == nil , x ~= nil
+checkequal(function () if (a==nil) then a=1 end; if a~=nil then a=1 end end,
+           function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
+
+check(function () if a==nil then a=1 end end,
+'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
+
+-- de morgan
+checkequal(function () local a; if not (a or b) then b=a end end,
+           function () local a; if (not a and not b) then b=a end end)
+
+checkequal(function (l) local a; return 0 <= a and a <= l end,
+           function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
+
+
+-- if-goto optimizations
+check(function (a)
+        if a == 1 then goto l1
+        elseif a == 2 then goto l2
+        elseif a == 3 then goto l2
+        else if a == 4 then goto l3
+             else goto l3
+             end
+        end
+        ::l1:: ::l2:: ::l3:: ::l4:: 
+end, 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'JMP', 'RETURN')
+
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) ::L2:: if not(a < 10) then goto L1 end; a = a + 1;
+                goto L2; ::L1:: end
+)
+
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) while true do if not(a < 10) then break end; a = a + 1; end end
+)
+
+print 'OK'
+
diff --git a/lua-5.3.1-tests/constructs.lua b/lua-5.3.1-tests/constructs.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/constructs.lua
@@ -0,0 +1,300 @@
+-- $Id: constructs.lua,v 1.39 2015/03/04 13:09:38 roberto Exp $
+
+;;print "testing syntax";;
+
+local debug = require "debug"
+
+-- testing semicollons
+do ;;; end
+; do ; a = 3; assert(a == 3) end;
+;
+
+
+-- invalid operations should not raise errors when not executed
+if false then a = 3 // 0; a = 0 % 0 end
+
+
+-- testing priorities
+
+assert(2^3^2 == 2^(3^2));
+assert(2^3*4 == (2^3)*4);
+assert(2.0^-2 == 1/4 and -2^- -2 == - - -4);
+assert(not nil and 2 and not(2>3 or 3<2));
+assert(-3-1-5 == 0+0-9);
+assert(-2^2 == -4 and (-2)^2 == 4 and 2*2-3-1 == 0);
+assert(-3%5 == 2 and -3+5 == 2)
+assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
+assert(not(2+1 > 3*1) and "a".."b" > "a");
+
+assert("7" .. 3 << 1 == 146)
+assert(10 >> 1 .. "9" == 0)
+assert(10 | 1 .. "9" == 27)
+
+assert(0xF0 | 0xCC ~ 0xAA & 0xFD == 0xF4)
+assert(0xFD & 0xAA ~ 0xCC | 0xF0 == 0xF4)
+assert(0xF0 & 0x0F + 1 == 0x10)
+
+assert(3^4//2^3//5 == 2)
+
+assert(-3+4*5//2^3^2//9+4%10/3 == (-3)+(((4*5)//(2^(3^2)))//9)+((4%10)/3))
+
+assert(not ((true or false) and nil))
+assert(      true or false  and nil)
+
+-- old bug
+assert((((1 or false) and true) or false) == true)
+assert((((nil and true) or false) and true) == false)
+
+local a,b = 1,nil;
+assert(-(1 or 2) == -1 and (1 and 2)+(-1.25 or -4) == 0.75);
+x = ((b or a)+1 == 2 and (10 or a)+1 == 11); assert(x);
+x = (((2<3) or 1) == true and (2<3 and 4) == 4); assert(x);
+
+x,y=1,2;
+assert((x>y) and x or y == 2);
+x,y=2,1;
+assert((x>y) and x or y == 2);
+
+assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
+
+
+-- silly loops
+repeat until 1; repeat until true;
+while false do end; while nil do end;
+
+do  -- test old bug (first name could not be an `upvalue')
+ local a; function f(x) x={a=1}; x={x=1}; x={G=1} end
+end
+
+function f (i)
+  if type(i) ~= 'number' then return i,'jojo'; end;
+  if i > 0 then return i, f(i-1); end;
+end
+
+x = {f(3), f(5), f(10);};
+assert(x[1] == 3 and x[2] == 5 and x[3] == 10 and x[4] == 9 and x[12] == 1);
+assert(x[nil] == nil)
+x = {f'alo', f'xixi', nil};
+assert(x[1] == 'alo' and x[2] == 'xixi' and x[3] == nil);
+x = {f'alo'..'xixi'};
+assert(x[1] == 'aloxixi')
+x = {f{}}
+assert(x[2] == 'jojo' and type(x[1]) == 'table')
+
+
+local f = function (i)
+  if i < 10 then return 'a';
+  elseif i < 20 then return 'b';
+  elseif i < 30 then return 'c';
+  end;
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == nil)
+
+for i=1,1000 do break; end;
+n=100;
+i=3;
+t = {};
+a=nil
+while not a do
+  a=0; for i=1,n do for i=i,1,-1 do a=a+1; t[i]=1; end; end;
+end
+assert(a == n*(n+1)/2 and i==3);
+assert(t[1] and t[n] and not t[0] and not t[n+1])
+
+function f(b)
+  local x = 1;
+  repeat
+    local a;
+    if b==1 then local b=1; x=10; break
+    elseif b==2 then x=20; break;
+    elseif b==3 then x=30;
+    else local a,b,c,d=math.sin(1); x=x+1;
+    end
+  until x>=12;
+  return x;
+end;
+
+assert(f(1) == 10 and f(2) == 20 and f(3) == 30 and f(4)==12)
+
+
+local f = function (i)
+  if i < 10 then return 'a'
+  elseif i < 20 then return 'b'
+  elseif i < 30 then return 'c'
+  else return 8
+  end
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == 8)
+
+local a, b = nil, 23
+x = {f(100)*2+3 or a, a or b+2}
+assert(x[1] == 19 and x[2] == 25)
+x = {f=2+3 or a, a = b+2}
+assert(x.f == 5 and x.a == 25)
+
+a={y=1}
+x = {a.y}
+assert(x[1] == 1)
+
+function f(i)
+  while 1 do
+    if i>0 then i=i-1;
+    else return; end;
+  end;
+end;
+
+function g(i)
+  while 1 do
+    if i>0 then i=i-1
+    else return end
+  end
+end
+
+f(10); g(10);
+
+do
+  function f () return 1,2,3; end
+  local a, b, c = f();
+  assert(a==1 and b==2 and c==3)
+  a, b, c = (f());
+  assert(a==1 and b==nil and c==nil)
+end
+
+local a,b = 3 and f();
+assert(a==1 and b==nil)
+
+function g() f(); return; end;
+assert(g() == nil)
+function g() return nil or f() end
+a,b = g()
+assert(a==1 and b==nil)
+
+print'+';
+
+
+f = [[
+return function ( a , b , c , d , e )
+  local x = a >= b or c or ( d and e ) or nil
+  return x
+end , { a = 1 , b = 2 >= 1 , } or { 1 };
+]]
+f = string.gsub(f, "%s+", "\n");   -- force a SETLINE between opcodes
+f,a = load(f)();
+assert(a.a == 1 and a.b)
+
+function g (a,b,c,d,e)
+  if not (a>=b or c or d and e or nil) then return 0; else return 1; end;
+end
+
+function h (a,b,c,d,e)
+  while (a>=b or c or (d and e) or nil) do return 1; end;
+  return 0;
+end;
+
+assert(f(2,1) == true and g(2,1) == 1 and h(2,1) == 1)
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,'a')
+~=          -- force SETLINE before nil
+nil, "")
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,nil,1,'x') == 'x' and g(1,2,nil,1,'x') == 1 and
+                                   h(1,2,nil,1,'x') == 1)
+assert(f(1,2,nil,nil,'x') == nil and g(1,2,nil,nil,'x') == 0 and
+                                     h(1,2,nil,nil,'x') == 0)
+assert(f(1,2,nil,1,nil) == nil and g(1,2,nil,1,nil) == 0 and
+                                   h(1,2,nil,1,nil) == 0)
+
+assert(1 and 2<3 == true and 2<3 and 'a'<'b' == true)
+x = 2<3 and not 3; assert(x==false)
+x = 2<1 or (2>1 and 'a'); assert(x=='a')
+
+
+do
+  local a; if nil then a=1; else a=2; end;    -- this nil comes as PUSHNIL 2
+  assert(a==2)
+end
+
+function F(a)
+  assert(debug.getinfo(1, "n").name == 'F')
+  return a,2,3
+end
+
+a,b = F(1)~=nil; assert(a == true and b == nil);
+a,b = F(nil)==nil; assert(a == true and b == nil)
+
+----------------------------------------------------------------
+------------------------------------------------------------------
+
+-- sometimes will be 0, sometimes will not...
+_ENV.GLOB1 = math.floor(os.time()) % 2
+
+-- basic expressions with their respective values
+local basiccases = {
+  {"nil", nil},
+  {"false", false},
+  {"true", true},
+  {"10", 10},
+  {"(0==_ENV.GLOB1)", 0 == _ENV.GLOB1},
+}
+
+print('testing short-circuit optimizations (' .. _ENV.GLOB1 .. ')')
+
+
+-- operators with their respective values
+local binops = {
+  {" and ", function (a,b) if not a then return a else return b end end},
+  {" or ", function (a,b) if a then return a else return b end end},
+}
+
+local cases = {}
+
+-- creates all combinations of '(cases[i] op cases[n-i])' plus
+-- 'not(cases[i] op cases[n-i])' (syntax + value)
+local function createcases (n)
+  local res = {}
+  for i = 1, n - 1 do
+    for _, v1 in ipairs(cases[i]) do
+      for _, v2 in ipairs(cases[n - i]) do
+        for _, op in ipairs(binops) do
+            local t = {
+              "(" .. v1[1] .. op[1] .. v2[1] .. ")",
+              op[2](v1[2], v2[2])
+            }
+            res[#res + 1] = t
+            res[#res + 1] = {"not" .. t[1], not t[2]}
+        end
+      end
+    end
+  end
+  return res
+end
+
+-- do not do too many combinations for soft tests
+local level = _soft and 3 or 4
+
+cases[1] = basiccases
+for i = 2, level do cases[i] = createcases(i) end
+print("+")
+
+local prog = [[if %s then IX = true end; return %s]]
+
+local i = 0
+for n = 1, level do
+  for _, v in pairs(cases[n]) do
+    local s = v[1]
+    local p = load(string.format(prog, s, s), "")
+    IX = false
+    assert(p() == v[2] and IX == not not v[2])
+    i = i + 1
+    if i % 60000 == 0 then print('+') end
+  end
+end
+------------------------------------------------------------------
+
+-- testing some syntax errors (chosen through 'gcov')
+assert(string.find(select(2, load("for x do")), "expected"))
+assert(string.find(select(2, load("x:call")), "expected"))
+
+print'OK'
diff --git a/lua-5.3.1-tests/coroutine.lua b/lua-5.3.1-tests/coroutine.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/coroutine.lua
@@ -0,0 +1,863 @@
+-- $Id: coroutine.lua,v 1.39 2015/04/14 18:05:03 roberto Exp $
+
+print "testing coroutines"
+
+local debug = require'debug'
+
+local f
+
+local main, ismain = coroutine.running()
+assert(type(main) == "thread" and ismain)
+assert(not coroutine.resume(main))
+assert(not coroutine.isyieldable())
+assert(not pcall(coroutine.yield))
+
+
+-- trivial errors
+assert(not pcall(coroutine.resume, 0))
+assert(not pcall(coroutine.status, 0))
+
+
+-- tests for multiple yield/resume arguments
+
+local function eqtab (t1, t2)
+  assert(#t1 == #t2)
+  for i = 1, #t1 do
+    local v = t1[i]
+    assert(t2[i] == v)
+  end
+end
+
+_G.x = nil   -- declare x
+function foo (a, ...)
+  local x, y = coroutine.running()
+  assert(x == f and y == false)
+  -- next call should not corrupt coroutine (but must fail,
+  -- as it attempts to resume the running coroutine)
+  assert(coroutine.resume(f) == false)
+  assert(coroutine.status(f) == "running")
+  local arg = {...}
+  assert(coroutine.isyieldable())
+  for i=1,#arg do
+    _G.x = {coroutine.yield(table.unpack(arg[i]))}
+  end
+  return table.unpack(a)
+end
+
+f = coroutine.create(foo)
+assert(type(f) == "thread" and coroutine.status(f) == "suspended")
+assert(string.find(tostring(f), "thread"))
+local s,a,b,c,d
+s,a,b,c,d = coroutine.resume(f, {1,2,3}, {}, {1}, {'a', 'b', 'c'})
+assert(s and a == nil and coroutine.status(f) == "suspended")
+s,a,b,c,d = coroutine.resume(f)
+eqtab(_G.x, {})
+assert(s and a == 1 and b == nil)
+s,a,b,c,d = coroutine.resume(f, 1, 2, 3)
+eqtab(_G.x, {1, 2, 3})
+assert(s and a == 'a' and b == 'b' and c == 'c' and d == nil)
+s,a,b,c,d = coroutine.resume(f, "xuxu")
+eqtab(_G.x, {"xuxu"})
+assert(s and a == 1 and b == 2 and c == 3 and d == nil)
+assert(coroutine.status(f) == "dead")
+s, a = coroutine.resume(f, "xuxu")
+assert(not s and string.find(a, "dead") and coroutine.status(f) == "dead")
+
+
+-- yields in tail calls
+local function foo (i) return coroutine.yield(i) end
+f = coroutine.wrap(function ()
+  for i=1,10 do
+    assert(foo(i) == _G.x)
+  end
+  return 'a'
+end)
+for i=1,10 do _G.x = i; assert(f(i) == i) end
+_G.x = 'xuxu'; assert(f('xuxu') == 'a')
+
+-- recursive
+function pf (n, i)
+  coroutine.yield(n)
+  pf(n*i, i+1)
+end
+
+f = coroutine.wrap(pf)
+local s=1
+for i=1,10 do
+  assert(f(1, 1) == s)
+  s = s*i
+end
+
+-- sieve
+function gen (n)
+  return coroutine.wrap(function ()
+    for i=2,n do coroutine.yield(i) end
+  end)
+end
+
+
+function filter (p, g)
+  return coroutine.wrap(function ()
+    while 1 do
+      local n = g()
+      if n == nil then return end
+      if math.fmod(n, p) ~= 0 then coroutine.yield(n) end
+    end
+  end)
+end
+
+local x = gen(100)
+local a = {}
+while 1 do
+  local n = x()
+  if n == nil then break end
+  table.insert(a, n)
+  x = filter(n, x)
+end
+
+assert(#a == 25 and a[#a] == 97)
+x, a = nil
+
+-- yielding across C boundaries
+
+co = coroutine.wrap(function()
+       assert(not pcall(table.sort,{1,2,3}, coroutine.yield))
+       assert(coroutine.isyieldable())
+       coroutine.yield(20)
+       return 30
+     end)
+
+assert(co() == 20)
+assert(co() == 30)
+
+
+local f = function (s, i) return coroutine.yield(i) end
+
+local f1 = coroutine.wrap(function ()
+             return xpcall(pcall, function (...) return ... end,
+               function ()
+                 local s = 0
+                 for i in f, nil, 1 do pcall(function () s = s + i end) end
+                 error({s})
+               end)
+           end)
+
+f1()
+for i = 1, 10 do assert(f1(i) == i) end
+local r1, r2, v = f1(nil)
+assert(r1 and not r2 and v[1] ==  (10 + 1)*10/2)
+
+
+function f (a, b) a = coroutine.yield(a);  error{a + b} end
+function g(x) return x[1]*2 end
+
+co = coroutine.wrap(function ()
+       coroutine.yield(xpcall(f, g, 10, 20))
+     end)
+
+assert(co() == 10)
+r, msg = co(100)
+assert(not r and msg == 240)
+
+
+-- unyieldable C call
+do
+  local function f (c)
+          assert(not coroutine.isyieldable())
+          return c .. c
+        end
+
+  local co = coroutine.wrap(function (c)
+               assert(coroutine.isyieldable())
+               local s = string.gsub("a", ".", f)
+               return s
+             end)
+  assert(co() == "aa")
+end
+
+
+-- errors in coroutines
+function foo ()
+  assert(debug.getinfo(1).currentline == debug.getinfo(foo).linedefined + 1)
+  assert(debug.getinfo(2).currentline == debug.getinfo(goo).linedefined)
+  coroutine.yield(3)
+  error(foo)
+end
+
+function goo() foo() end
+x = coroutine.wrap(goo)
+assert(x() == 3)
+local a,b = pcall(x)
+assert(not a and b == foo)
+
+x = coroutine.create(goo)
+a,b = coroutine.resume(x)
+assert(a and b == 3)
+a,b = coroutine.resume(x)
+assert(not a and b == foo and coroutine.status(x) == "dead")
+a,b = coroutine.resume(x)
+assert(not a and string.find(b, "dead") and coroutine.status(x) == "dead")
+
+
+-- co-routines x for loop
+function all (a, n, k)
+  if k == 0 then coroutine.yield(a)
+  else
+    for i=1,n do
+      a[k] = i
+      all(a, n, k-1)
+    end
+  end
+end
+
+local a = 0
+for t in coroutine.wrap(function () all({}, 5, 4) end) do
+  a = a+1
+end
+assert(a == 5^4)
+
+
+-- access to locals of collected corroutines
+local C = {}; setmetatable(C, {__mode = "kv"})
+local x = coroutine.wrap (function ()
+            local a = 10
+            local function f () a = a+10; return a end
+            while true do
+              a = a+1
+              coroutine.yield(f)
+            end
+          end)
+
+C[1] = x;
+
+local f = x()
+assert(f() == 21 and x()() == 32 and x() == f)
+x = nil
+collectgarbage()
+assert(C[1] == nil)
+assert(f() == 43 and f() == 53)
+
+
+-- old bug: attempt to resume itself
+
+function co_func (current_co)
+  assert(coroutine.running() == current_co)
+  assert(coroutine.resume(current_co) == false)
+  coroutine.yield(10, 20)
+  assert(coroutine.resume(current_co) == false)
+  coroutine.yield(23)
+  return 10
+end
+
+local co = coroutine.create(co_func)
+local a,b,c = coroutine.resume(co, co)
+assert(a == true and b == 10 and c == 20)
+a,b = coroutine.resume(co, co)
+assert(a == true and b == 23)
+a,b = coroutine.resume(co, co)
+assert(a == true and b == 10)
+assert(coroutine.resume(co, co) == false)
+assert(coroutine.resume(co, co) == false)
+
+
+-- attempt to resume 'normal' coroutine
+local co1, co2
+co1 = coroutine.create(function () return co2() end)
+co2 = coroutine.wrap(function ()
+        assert(coroutine.status(co1) == 'normal')
+        assert(not coroutine.resume(co1))
+        coroutine.yield(3)
+      end)
+
+a,b = coroutine.resume(co1)
+assert(a and b == 3)
+assert(coroutine.status(co1) == 'dead')
+
+-- infinite recursion of coroutines
+a = function(a) coroutine.wrap(a)(a) end
+assert(not pcall(a, a))
+a = nil
+
+
+-- access to locals of erroneous coroutines
+local x = coroutine.create (function ()
+            local a = 10
+            _G.f = function () a=a+1; return a end
+            error('x')
+          end)
+
+assert(not coroutine.resume(x))
+-- overwrite previous position of local `a'
+assert(not coroutine.resume(x, 1, 1, 1, 1, 1, 1, 1))
+assert(_G.f() == 11)
+assert(_G.f() == 12)
+
+
+if not T then
+  (Message or print)('\n >>> testC not active: skipping yield/hook tests <<<\n')
+else
+  print "testing yields inside hooks"
+
+  local turn
+  
+  function fact (t, x)
+    assert(turn == t)
+    if x == 0 then return 1
+    else return x*fact(t, x-1)
+    end
+  end
+
+  local A, B = 0, 0
+
+  local x = coroutine.create(function ()
+    T.sethook("yield 0", "", 2)
+    A = fact("A", 6)
+  end)
+
+  local y = coroutine.create(function ()
+    T.sethook("yield 0", "", 3)
+    B = fact("B", 7)
+  end)
+
+  while A==0 or B==0 do    -- A ~= 0 when 'x' finishes (similar for 'B','y')
+    if A==0 then turn = "A"; assert(T.resume(x)) end
+    if B==0 then turn = "B"; assert(T.resume(y)) end
+  end
+
+  assert(B // A == 7)    -- fact(7) // fact(6)
+
+  local line = debug.getinfo(1, "l").currentline + 2    -- get line number
+  local function foo ()
+    local x = 10    --<< this line is 'line'
+    x = x + 10
+    _G.XX = x
+  end
+
+  -- testing yields in line hook
+  local co = coroutine.wrap(function ()
+    T.sethook("setglobal X; yield 0", "l", 0); foo(); return 10 end)
+
+  _G.XX = nil;
+  _G.X = nil; co(); assert(_G.X == line)
+  _G.X = nil; co(); assert(_G.X == line + 1)
+  _G.X = nil; co(); assert(_G.X == line + 2 and _G.XX == nil)
+  _G.X = nil; co(); assert(_G.X == line + 3 and _G.XX == 20)
+  assert(co() == 10)
+
+  -- testing yields in count hook
+  co = coroutine.wrap(function ()
+    T.sethook("yield 0", "", 1); foo(); return 10 end)
+
+  _G.XX = nil;
+  local c = 0
+  repeat c = c + 1; local a = co() until a == 10
+  assert(_G.XX == 20 and c == 10)
+
+  co = coroutine.wrap(function ()
+    T.sethook("yield 0", "", 2); foo(); return 10 end)
+
+  _G.XX = nil;
+  local c = 0
+  repeat c = c + 1; local a = co() until a == 10
+  assert(_G.XX == 20 and c == 5)
+  _G.X = nil; _G.XX = nil
+
+  do
+    -- testing debug library on a coroutine suspended inside a hook
+    -- (bug in 5.2/5.3)
+    c = coroutine.create(function (a, ...)
+      T.sethook("yield 0", "l")   -- will yield on next two lines
+      assert(a == 10)
+      return ...
+    end)
+
+    assert(coroutine.resume(c, 1, 2, 3))   -- start coroutine
+    local n,v = debug.getlocal(c, 0, 1)    -- check its local
+    assert(n == "a" and v == 1)
+    n,v = debug.getlocal(c, 0, -1)         -- check varargs
+    assert(v == 2)
+    n,v = debug.getlocal(c, 0, -2)
+    assert(v == 3)
+    assert(debug.setlocal(c, 0, 1, 10))     -- test 'setlocal'
+    assert(debug.setlocal(c, 0, -2, 20))
+    local t = debug.getinfo(c, 0)        -- test 'getinfo'
+    assert(t.currentline == t.linedefined + 1)
+    assert(not debug.getinfo(c, 1))      -- no other level
+    assert(coroutine.resume(c))          -- run next line
+    v = {coroutine.resume(c)}         -- finish coroutine
+    assert(v[1] == true and v[2] == 2 and v[3] == 20 and v[4] == nil)
+    assert(not coroutine.resume(c))
+  end
+
+  do
+    -- testing debug library on last function in a suspended coroutine
+    -- (bug in 5.2/5.3)
+    local c = coroutine.create(function () T.testC("yield 1", 10, 20) end)
+    local a, b = coroutine.resume(c)
+    assert(a and b == 20)
+    assert(debug.getinfo(c, 0).linedefined == -1)
+    a, b = debug.getlocal(c, 0, 2)
+    assert(b == 10)
+  end
+
+
+  print "testing coroutine API"
+  
+  -- reusing a thread
+  assert(T.testC([[
+    newthread      # create thread
+    pushvalue 2    # push body
+    pushstring 'a a a'  # push argument
+    xmove 0 3 2   # move values to new thread
+    resume -1, 1    # call it first time
+    pushstatus
+    xmove 3 0 0   # move results back to stack
+    setglobal X    # result
+    setglobal Y    # status
+    pushvalue 2     # push body (to call it again)
+    pushstring 'b b b'
+    xmove 0 3 2
+    resume -1, 1    # call it again
+    pushstatus
+    xmove 3 0 0
+    return 1        # return result
+  ]], function (...) return ... end) == 'b b b')
+
+  assert(X == 'a a a' and Y == 'OK')
+
+
+  -- resuming running coroutine
+  C = coroutine.create(function ()
+        return T.testC([[
+                 pushnum 10;
+                 pushnum 20;
+                 resume -3 2;
+                 pushstatus
+                 gettop;
+                 return 3]], C)
+      end)
+  local a, b, c, d = coroutine.resume(C)
+  assert(a == true and string.find(b, "non%-suspended") and
+         c == "ERRRUN" and d == 4)
+
+  a, b, c, d = T.testC([[
+    rawgeti R 1    # get main thread
+    pushnum 10;
+    pushnum 20;
+    resume -3 2;
+    pushstatus
+    gettop;
+    return 4]])
+  assert(a == coroutine.running() and string.find(b, "non%-suspended") and
+         c == "ERRRUN" and d == 4)
+
+
+  -- using a main thread as a coroutine
+  local state = T.newstate()
+  T.loadlib(state)
+
+  assert(T.doremote(state, [[
+    coroutine = require'coroutine';
+    X = function (x) coroutine.yield(x, 'BB'); return 'CC' end;
+    return 'ok']]))
+
+  t = table.pack(T.testC(state, [[
+    rawgeti R 1     # get main thread
+    pushstring 'XX'
+    getglobal X    # get function for body
+    pushstring AA      # arg
+    resume 1 1      # 'resume' shadows previous stack!
+    gettop
+    setglobal T    # top
+    setglobal B    # second yielded value
+    setglobal A    # fist yielded value
+    rawgeti R 1     # get main thread
+    pushnum 5       # arg (noise)
+    resume 1 1      # after coroutine ends, previous stack is back
+    pushstatus
+    gettop
+    return .
+  ]]))
+  assert(t.n == 4 and t[2] == 'XX' and t[3] == 'CC' and t[4] == 'OK')
+  assert(T.doremote(state, "return T") == '2')
+  assert(T.doremote(state, "return A") == 'AA')
+  assert(T.doremote(state, "return B") == 'BB')
+
+  T.closestate(state)
+
+  print'+'
+
+end
+
+
+-- leaving a pending coroutine open
+_X = coroutine.wrap(function ()
+      local a = 10
+      local x = function () a = a+1 end
+      coroutine.yield()
+    end)
+
+_X()
+
+
+if not _soft then
+  -- bug (stack overflow)
+  local j = 2^9
+  local lim = 1000000    -- (C stack limit; assume 32-bit machine)
+  local t = {lim - 10, lim - 5, lim - 1, lim, lim + 1}
+  for i = 1, #t do
+    local j = t[i]
+    co = coroutine.create(function()
+           local t = {}
+           for i = 1, j do t[i] = i end
+           return table.unpack(t)
+         end)
+    local r, msg = coroutine.resume(co)
+    assert(not r)
+  end
+  co = nil
+end
+
+
+assert(coroutine.running() == main)
+
+print"+"
+
+
+print"testing yields inside metamethods"
+
+local mt = {
+  __eq = function(a,b) coroutine.yield(nil, "eq"); return a.x == b.x end,
+  __lt = function(a,b) coroutine.yield(nil, "lt"); return a.x < b.x end,
+  __le = function(a,b) coroutine.yield(nil, "le"); return a - b <= 0 end,
+  __add = function(a,b) coroutine.yield(nil, "add"); return a.x + b.x end,
+  __sub = function(a,b) coroutine.yield(nil, "sub"); return a.x - b.x end,
+  __mod = function(a,b) coroutine.yield(nil, "mod"); return a.x % b.x end,
+  __unm = function(a,b) coroutine.yield(nil, "unm"); return -a.x end,
+  __bnot = function(a,b) coroutine.yield(nil, "bnot"); return ~a.x end,
+  __shl = function(a,b) coroutine.yield(nil, "shl"); return a.x << b.x end,
+  __shr = function(a,b) coroutine.yield(nil, "shr"); return a.x >> b.x end,
+  __band = function(a,b)
+             a = type(a) == "table" and a.x or a
+             b = type(b) == "table" and b.x or b
+             coroutine.yield(nil, "band")
+             return a & b
+           end,
+  __bor = function(a,b) coroutine.yield(nil, "bor"); return a.x | b.x end,
+  __bxor = function(a,b) coroutine.yield(nil, "bxor"); return a.x ~ b.x end,
+
+  __concat = function(a,b)
+               coroutine.yield(nil, "concat");
+               a = type(a) == "table" and a.x or a
+               b = type(b) == "table" and b.x or b
+               return a .. b
+             end,
+  __index = function (t,k) coroutine.yield(nil, "idx"); return t.k[k] end,
+  __newindex = function (t,k,v) coroutine.yield(nil, "nidx"); t.k[k] = v end,
+}
+
+
+local function new (x)
+  return setmetatable({x = x, k = {}}, mt)
+end
+
+
+local a = new(10)
+local b = new(12)
+local c = new"hello"
+
+local function run (f, t)
+  local i = 1
+  local c = coroutine.wrap(f)
+  while true do
+    local res, stat = c()
+    if res then assert(t[i] == nil); return res, t end
+    assert(stat == t[i])
+    i = i + 1
+  end
+end
+
+
+assert(run(function () if (a>=b) then return '>=' else return '<' end end,
+       {"le", "sub"}) == "<")
+-- '<=' using '<'
+mt.__le = nil
+assert(run(function () if (a<=b) then return '<=' else return '>' end end,
+       {"lt"}) == "<=")
+assert(run(function () if (a==b) then return '==' else return '~=' end end,
+       {"eq"}) == "~=")
+
+assert(run(function () return a & b + a end, {"add", "band"}) == 2)
+
+assert(run(function () return a % b end, {"mod"}) == 10)
+
+assert(run(function () return ~a & b end, {"bnot", "band"}) == ~10 & 12)
+assert(run(function () return a | b end, {"bor"}) == 10 | 12)
+assert(run(function () return a ~ b end, {"bxor"}) == 10 ~ 12)
+assert(run(function () return a << b end, {"shl"}) == 10 << 12)
+assert(run(function () return a >> b end, {"shr"}) == 10 >> 12)
+
+assert(run(function () return a..b end, {"concat"}) == "1012")
+
+assert(run(function() return a .. b .. c .. a end,
+       {"concat", "concat", "concat"}) == "1012hello10")
+
+assert(run(function() return "a" .. "b" .. a .. "c" .. c .. b .. "x" end,
+       {"concat", "concat", "concat"}) == "ab10chello12x")
+
+
+do   -- a few more tests for comparsion operators
+  local mt1 = {
+    __le = function (a,b)
+      coroutine.yield(10)
+      return
+        (type(a) == "table" and a.x or a) <= (type(b) == "table" and b.x or b)
+    end,
+    __lt = function (a,b)
+      coroutine.yield(10)
+      return
+        (type(a) == "table" and a.x or a) < (type(b) == "table" and b.x or b)
+    end,
+  }
+  local mt2 = { __lt = mt1.__lt }   -- no __le
+
+  local function run (f)
+    local co = coroutine.wrap(f)
+    local res
+    repeat
+      res = co()
+    until res ~= 10
+    return res
+  end
+  
+  local function test ()
+    local a1 = setmetatable({x=1}, mt1)
+    local a2 = setmetatable({x=2}, mt2)
+    assert(a1 < a2)
+    assert(a1 <= a2)
+    assert(1 < a2)
+    assert(1 <= a2)
+    assert(2 > a1)
+    assert(2 >= a2)
+    return true
+  end
+  
+  run(test)
+
+end
+
+assert(run(function ()
+             a.BB = print
+             return a.BB
+           end, {"nidx", "idx"}) == print)
+
+-- getuptable & setuptable
+do local _ENV = _ENV
+  f = function () AAA = BBB + 1; return AAA end
+end
+g = new(10); g.k.BBB = 10;
+debug.setupvalue(f, 1, g)
+assert(run(f, {"idx", "nidx", "idx"}) == 11)
+assert(g.k.AAA == 11)
+
+print"+"
+
+print"testing yields inside 'for' iterators"
+
+local f = function (s, i)
+      if i%2 == 0 then coroutine.yield(nil, "for") end
+      if i < s then return i + 1 end
+    end
+
+assert(run(function ()
+             local s = 0
+             for i in f, 4, 0 do s = s + i end
+             return s
+           end, {"for", "for", "for"}) == 10)
+
+
+
+-- tests for coroutine API
+if T==nil then
+  (Message or print)('\n >>> testC not active: skipping coroutine API tests <<<\n')
+  return
+end
+
+print('testing coroutine API')
+
+local function apico (...)
+  local x = {...}
+  return coroutine.wrap(function ()
+    return T.testC(table.unpack(x))
+  end)
+end
+
+local a = {apico(
+[[
+  pushstring errorcode
+  pcallk 1 0 2;
+  invalid command (should not arrive here)
+]],
+[[gettop; return .]],
+"stackmark",
+error
+)()}
+assert(#a == 4 and
+       a[3] == "stackmark" and
+       a[4] == "errorcode" and
+       _G.status == "ERRRUN" and
+       _G.ctx == 2)       -- 'ctx' to pcallk
+
+local co = apico(
+  "pushvalue 2; pushnum 10; pcallk 1 2 3; invalid command;",
+  coroutine.yield,
+  "getglobal status; getglobal ctx; pushvalue 2; pushstring a; pcallk 1 0 4; invalid command",
+  "getglobal status; getglobal ctx; gettop; return .")
+
+assert(co() == 10)
+assert(co(20, 30) == 'a')
+a = {co()}
+assert(#a == 10 and
+       a[2] == coroutine.yield and
+       a[5] == 20 and a[6] == 30 and
+       a[7] == "YIELD" and a[8] == 3 and
+       a[9] == "YIELD" and a[10] == 4)
+assert(not pcall(co))   -- coroutine is dead now
+
+
+f = T.makeCfunc("pushnum 3; pushnum 5; yield 1;")
+co = coroutine.wrap(function ()
+  assert(f() == 23); assert(f() == 23); return 10
+end)
+assert(co(23,16) == 5)
+assert(co(23,16) == 5)
+assert(co(23,16) == 10)
+
+
+-- testing coroutines with C bodies
+f = T.makeCfunc([[
+        pushnum 102
+	yieldk	1 U2
+	cannot be here!
+]],
+[[      # continuation
+	pushvalue U3   # accessing upvalues inside a continuation
+        pushvalue U4
+	gettop
+	return .
+]], 23, "huu")
+
+x = coroutine.wrap(f)
+assert(x() == 102)
+eqtab({x()}, {23, "huu"})
+
+
+f = T.makeCfunc[[pushstring 'a'; pushnum 102; yield 2; ]]
+
+a, b, c, d = T.testC([[newthread; pushvalue 2; xmove 0 3 1; resume 3 0;
+                       pushstatus; xmove 3 0 0;  resume 3 0; pushstatus;
+                       return 4; ]], f)
+
+assert(a == 'YIELD' and b == 'a' and c == 102 and d == 'OK')
+
+
+-- testing chain of suspendable C calls
+
+local count = 3   -- number of levels
+
+f = T.makeCfunc([[
+  remove 1;             # remove argument
+  pushvalue U3;         # get selection function
+  call 0 1;             # call it  (result is 'f' or 'yield')
+  pushstring hello      # single argument for selected function
+  pushupvalueindex 2;   # index of continuation program
+  callk 1 -1 .;		# call selected function
+  errorerror		# should never arrive here
+]],
+[[
+  # continuation program
+  pushnum 34	# return value
+  gettop
+  return .     # return all results
+]],
+function ()     -- selection function
+  count = count - 1
+  if count == 0 then return coroutine.yield
+  else return f
+  end
+end
+)
+
+co = coroutine.wrap(function () return f(nil) end)
+assert(co() == "hello")   -- argument to 'yield'
+a = {co()}
+-- three '34's (one from each pending C call)
+assert(#a == 3 and a[1] == a[2] and a[2] == a[3] and a[3] == 34)
+
+
+-- testing yields with continuations
+
+co = coroutine.wrap(function (...) return
+       T.testC([[ # initial function
+          yieldk 1 2
+          cannot be here!
+       ]],
+       [[  # 1st continuation
+         yieldk 0 3 
+         cannot be here!
+       ]],
+       [[  # 2nd continuation
+         yieldk 0 4 
+         cannot be here!
+       ]],
+       [[  # 3th continuation
+          pushvalue 6   # function which is last arg. to 'testC' here
+          pushnum 10; pushnum 20;
+          pcall 2 0 0   # call should throw an error and return to next line
+          pop 1		# remove error message
+          pushvalue 6
+          getglobal status; getglobal ctx
+          pcallk 2 2 5  # call should throw an error and jump to continuation
+          cannot be here!
+       ]],
+       [[  # 4th (and last) continuation
+         gettop
+         return .
+       ]],
+       -- function called by 3th continuation
+       function (a,b) x=a; y=b; error("errmsg") end,
+       ...
+)
+end)
+
+local a = {co(3,4,6)}
+assert(a[1] == 6 and a[2] == nil)
+a = {co()}; assert(a[1] == nil and _G.status == "YIELD" and _G.ctx == 2)
+a = {co()}; assert(a[1] == nil and _G.status == "YIELD" and _G.ctx == 3)
+a = {co(7,8)};
+-- original arguments
+assert(type(a[1]) == 'string' and type(a[2]) == 'string' and
+     type(a[3]) == 'string' and type(a[4]) == 'string' and
+     type(a[5]) == 'string' and type(a[6]) == 'function')
+-- arguments left from fist resume
+assert(a[7] == 3 and a[8] == 4)
+-- arguments to last resume
+assert(a[9] == 7 and a[10] == 8)
+-- error message and nothing more
+assert(a[11]:find("errmsg") and #a == 11)
+-- check arguments to pcallk
+assert(x == "YIELD" and y == 4)
+
+assert(not pcall(co))   -- coroutine should be dead
+
+
+-- bug in nCcalls
+local co = coroutine.wrap(function ()
+  local a = {pcall(pcall,pcall,pcall,pcall,pcall,pcall,pcall,error,"hi")}
+  return pcall(assert, table.unpack(a))
+end)
+
+local a = {co()}
+assert(a[10] == "hi")
+
+print'OK'
diff --git a/lua-5.3.1-tests/db.lua b/lua-5.3.1-tests/db.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/db.lua
@@ -0,0 +1,796 @@
+-- $Id: db.lua,v 1.77 2015/06/01 16:39:11 roberto Exp $
+
+-- testing debug library
+
+local debug = require "debug"
+
+local function dostring(s) return assert(load(s))() end
+
+print"testing debug library and debug information"
+
+do
+local a=1
+end
+
+assert(not debug.gethook())
+
+function test (s, l, p)
+  collectgarbage()   -- avoid gc during trace
+  local function f (event, line)
+    assert(event == 'line')
+    local l = table.remove(l, 1)
+    if p then print(l, line) end
+    assert(l == line, "wrong trace!!")
+  end
+  debug.sethook(f,"l"); load(s)(); debug.sethook()
+  assert(#l == 0)
+end
+
+
+do
+  assert(not pcall(debug.getinfo, print, "X"))   -- invalid option
+  assert(not debug.getinfo(1000))   -- out of range level
+  assert(not debug.getinfo(-1))     -- out of range level
+  local a = debug.getinfo(print)
+  assert(a.what == "C" and a.short_src == "[C]")
+  a = debug.getinfo(print, "L")
+  assert(a.activelines == nil)
+  local b = debug.getinfo(test, "SfL")
+  assert(b.name == nil and b.what == "Lua" and b.linedefined == 17 and
+         b.lastlinedefined == b.linedefined + 10 and
+         b.func == test and not string.find(b.short_src, "%["))
+  assert(b.activelines[b.linedefined + 1] and
+         b.activelines[b.lastlinedefined])
+  assert(not b.activelines[b.linedefined] and
+         not b.activelines[b.lastlinedefined + 1])
+end
+
+
+-- test file and string names truncation
+a = "function f () end"
+local function dostring (s, x) return load(s, x)() end
+dostring(a)
+assert(debug.getinfo(f).short_src == string.format('[string "%s"]', a))
+dostring(a..string.format("; %s\n=1", string.rep('p', 400)))
+assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
+dostring(a..string.format("; %s=1", string.rep('p', 400)))
+assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
+dostring("\n"..a)
+assert(debug.getinfo(f).short_src == '[string "..."]')
+dostring(a, "")
+assert(debug.getinfo(f).short_src == '[string ""]')
+dostring(a, "@xuxu")
+assert(debug.getinfo(f).short_src == "xuxu")
+dostring(a, "@"..string.rep('p', 1000)..'t')
+assert(string.find(debug.getinfo(f).short_src, "^%.%.%.p*t$"))
+dostring(a, "=xuxu")
+assert(debug.getinfo(f).short_src == "xuxu")
+dostring(a, string.format("=%s", string.rep('x', 500)))
+assert(string.find(debug.getinfo(f).short_src, "^x*$"))
+dostring(a, "=")
+assert(debug.getinfo(f).short_src == "")
+a = nil; f = nil;
+
+
+repeat
+  local g = {x = function ()
+    local a = debug.getinfo(2)
+    assert(a.name == 'f' and a.namewhat == 'local')
+    a = debug.getinfo(1)
+    assert(a.name == 'x' and a.namewhat == 'field')
+    return 'xixi'
+  end}
+  local f = function () return 1+1 and (not 1 or g.x()) end
+  assert(f() == 'xixi')
+  g = debug.getinfo(f)
+  assert(g.what == "Lua" and g.func == f and g.namewhat == "" and not g.name)
+
+  function f (x, name)   -- local!
+    name = name or 'f'
+    local a = debug.getinfo(1)
+    assert(a.name == name and a.namewhat == 'local')
+    return x
+  end
+
+  -- breaks in different conditions
+  if 3>4 then break end; f()
+  if 3<4 then a=1 else break end; f()
+  while 1 do local x=10; break end; f()
+  local b = 1
+  if 3>4 then return math.sin(1) end; f()
+  a = 3<4; f()
+  a = 3<4 or 1; f()
+  repeat local x=20; if 4>3 then f() else break end; f() until 1
+  g = {}
+  f(g).x = f(2) and f(10)+f(9)
+  assert(g.x == f(19))
+  function g(x) if not x then return 3 end return (x('a', 'x')) end
+  assert(g(f) == 'a')
+until 1
+
+test([[if
+math.sin(1)
+then
+  a=1
+else
+  a=2
+end
+]], {2,3,4,7})
+
+test([[--
+if nil then
+  a=1
+else
+  a=2
+end
+]], {2,5,6})
+
+test([[a=1
+repeat
+  a=a+1
+until a==3
+]], {1,3,4,3,4})
+
+test([[ do
+  return
+end
+]], {2})
+
+test([[local a
+a=1
+while a<=3 do
+  a=a+1
+end
+]], {1,2,3,4,3,4,3,4,3,5})
+
+test([[while math.sin(1) do
+  if math.sin(1)
+  then break
+  end
+end
+a=1]], {1,2,3,6})
+
+test([[for i=1,3 do
+  a=i
+end
+]], {1,2,1,2,1,2,1,3})
+
+test([[for i,v in pairs{'a','b'} do
+  a=tostring(i) .. v
+end
+]], {1,2,1,2,1,3})
+
+test([[for i=1,4 do a=1 end]], {1,1,1,1,1})
+
+
+
+print'+'
+
+-- invalid levels in [gs]etlocal
+assert(not pcall(debug.getlocal, 20, 1))
+assert(not pcall(debug.setlocal, -1, 1, 10))
+
+
+-- parameter names
+local function foo (a,b,...) local d, e end
+local co = coroutine.create(foo)
+
+assert(debug.getlocal(foo, 1) == 'a')
+assert(debug.getlocal(foo, 2) == 'b')
+assert(not debug.getlocal(foo, 3))
+assert(debug.getlocal(co, foo, 1) == 'a')
+assert(debug.getlocal(co, foo, 2) == 'b')
+assert(not debug.getlocal(co, foo, 3))
+
+assert(not debug.getlocal(print, 1))
+
+
+-- varargs
+local function foo (a, ...)
+  local t = table.pack(...)
+  for i = 1, t.n do
+    local n, v = debug.getlocal(1, -i)
+    assert(n == "(*vararg)" and v == t[i])
+  end
+  assert(not debug.getlocal(1, -(t.n + 1)))
+  assert(not debug.setlocal(1, -(t.n + 1), 30))
+  if t.n > 0 then
+    (function (x)
+      assert(debug.setlocal(2, -1, x) == "(*vararg)")
+      assert(debug.setlocal(2, -t.n, x) == "(*vararg)")
+     end)(430)
+     assert(... == 430)
+  end
+end
+
+foo()
+foo(print)
+foo(200, 3, 4)
+local a = {}
+for i = 1, (_soft and 100 or 1000) do a[i] = i end
+foo(table.unpack(a))
+a = nil
+
+-- access to vararg in non-vararg function
+local function foo () return debug.getlocal(1, -1) end
+assert(not foo(10))
+
+
+do   -- test hook presence in debug info
+  assert(not debug.gethook())
+  local count = 0
+  local function f ()
+    assert(debug.getinfo(1).namewhat == "hook")
+    local sndline = string.match(debug.traceback(), "\n(.-)\n")
+    assert(string.find(sndline, "hook"))
+    count = count + 1
+  end
+  debug.sethook(f, "l")
+  local a = 0
+  _ENV.a = a
+  a = 1
+  debug.sethook()
+  assert(count == 4)
+end
+
+
+a = {}; L = nil
+local glob = 1
+local oldglob = glob
+debug.sethook(function (e,l)
+  collectgarbage()   -- force GC during a hook
+  local f, m, c = debug.gethook()
+  assert(m == 'crl' and c == 0)
+  if e == "line" then
+    if glob ~= oldglob then
+      L = l-1   -- get the first line where "glob" has changed
+      oldglob = glob
+    end
+  elseif e == "call" then
+      local f = debug.getinfo(2, "f").func
+      a[f] = 1
+  else assert(e == "return")
+  end
+end, "crl")
+
+
+function f(a,b)
+  collectgarbage()
+  local _, x = debug.getlocal(1, 1)
+  local _, y = debug.getlocal(1, 2)
+  assert(x == a and y == b)
+  assert(debug.setlocal(2, 3, "pera") == "AA".."AA")
+  assert(debug.setlocal(2, 4, "maçã") == "B")
+  x = debug.getinfo(2)
+  assert(x.func == g and x.what == "Lua" and x.name == 'g' and
+         x.nups == 2 and string.find(x.source, "^@.*db%.lua$"))
+  glob = glob+1
+  assert(debug.getinfo(1, "l").currentline == L+1)
+  assert(debug.getinfo(1, "l").currentline == L+2)
+end
+
+function foo()
+  glob = glob+1
+  assert(debug.getinfo(1, "l").currentline == L+1)
+end; foo()  -- set L
+-- check line counting inside strings and empty lines
+
+_ = 'alo\
+alo' .. [[
+
+]]
+--[[
+]]
+assert(debug.getinfo(1, "l").currentline == L+11)  -- check count of lines
+
+
+function g(...)
+  local arg = {...}
+  do local a,b,c; a=math.sin(40); end
+  local feijao
+  local AAAA,B = "xuxu", "mamão"
+  f(AAAA,B)
+  assert(AAAA == "pera" and B == "maçã")
+  do
+     local B = 13
+     local x,y = debug.getlocal(1,5)
+     assert(x == 'B' and y == 13)
+  end
+end
+
+g()
+
+
+assert(a[f] and a[g] and a[assert] and a[debug.getlocal] and not a[print])
+
+
+-- tests for manipulating non-registered locals (C and Lua temporaries)
+
+local n, v = debug.getlocal(0, 1)
+assert(v == 0 and n == "(*temporary)")
+local n, v = debug.getlocal(0, 2)
+assert(v == 2 and n == "(*temporary)")
+assert(not debug.getlocal(0, 3))
+assert(not debug.getlocal(0, 0))
+
+function f()
+  assert(select(2, debug.getlocal(2,3)) == 1)
+  assert(not debug.getlocal(2,4))
+  debug.setlocal(2, 3, 10)
+  return 20
+end
+
+function g(a,b) return (a+1) + f() end
+
+assert(g(0,0) == 30)
+ 
+
+debug.sethook(nil);
+assert(debug.gethook() == nil)
+
+
+-- testing access to function arguments
+
+local function collectlocals (level)
+  local tab = {}
+  for i = 1, math.huge do
+    local n, v = debug.getlocal(level + 1, i)
+    if not (n and string.find(n, "^[a-zA-Z0-9_]+$")) then
+       break   -- consider only real variables
+    end
+    tab[n] = v
+  end
+  return tab
+end
+
+
+X = nil
+a = {}
+function a:f (a, b, ...) local arg = {...}; local c = 13 end
+debug.sethook(function (e)
+  assert(e == "call")
+  dostring("XX = 12")  -- test dostring inside hooks
+  -- testing errors inside hooks
+  assert(not pcall(load("a='joao'+1")))
+  debug.sethook(function (e, l) 
+    assert(debug.getinfo(2, "l").currentline == l)
+    local f,m,c = debug.gethook()
+    assert(e == "line")
+    assert(m == 'l' and c == 0)
+    debug.sethook(nil)  -- hook is called only once
+    assert(not X)       -- check that
+    X = collectlocals(2)
+  end, "l")
+end, "c")
+
+a:f(1,2,3,4,5)
+assert(X.self == a and X.a == 1   and X.b == 2 and X.c == nil)
+assert(XX == 12)
+assert(debug.gethook() == nil)
+
+
+-- testing access to local variables in return hook (bug in 5.2)
+do
+  local function foo (a, b)
+    do local x,y,z end
+    local c, d = 10, 20
+    return
+  end
+
+  local function aux ()
+    if debug.getinfo(2).name == "foo" then
+      foo = nil   -- to signal that it found 'foo'
+      local tab = {a = 100, b = 200, c = 10, d = 20}
+      for n, v in pairs(collectlocals(2)) do
+        assert(tab[n] == v)
+        tab[n] = nil
+      end
+      assert(next(tab) == nil)    -- 'tab' must be empty
+    end
+  end
+
+  debug.sethook(aux, "r"); foo(100, 200); debug.sethook()
+  assert(foo == nil)
+end
+
+-- testing upvalue access
+local function getupvalues (f)
+  local t = {}
+  local i = 1
+  while true do
+    local name, value = debug.getupvalue(f, i)
+    if not name then break end
+    assert(not t[name])
+    t[name] = value
+    i = i + 1
+  end
+  return t
+end
+
+local a,b,c = 1,2,3
+local function foo1 (a) b = a; return c end
+local function foo2 (x) a = x; return c+b end
+assert(not debug.getupvalue(foo1, 3))
+assert(not debug.getupvalue(foo1, 0))
+assert(not debug.setupvalue(foo1, 3, "xuxu"))
+local t = getupvalues(foo1)
+assert(t.a == nil and t.b == 2 and t.c == 3)
+t = getupvalues(foo2)
+assert(t.a == 1 and t.b == 2 and t.c == 3)
+assert(debug.setupvalue(foo1, 1, "xuxu") == "b")
+assert(({debug.getupvalue(foo2, 3)})[2] == "xuxu")
+-- upvalues of C functions are allways "called" "" (the empty string)
+assert(debug.getupvalue(string.gmatch("x", "x"), 1) == "")  
+
+
+-- testing count hooks
+local a=0
+debug.sethook(function (e) a=a+1 end, "", 1)
+a=0; for i=1,1000 do end; assert(1000 < a and a < 1012)
+debug.sethook(function (e) a=a+1 end, "", 4)
+a=0; for i=1,1000 do end; assert(250 < a and a < 255)
+local f,m,c = debug.gethook()
+assert(m == "" and c == 4)
+debug.sethook(function (e) a=a+1 end, "", 4000)
+a=0; for i=1,1000 do end; assert(a == 0)
+
+do
+  debug.sethook(print, "", 2^24 - 1)   -- count upperbound
+  local f,m,c = debug.gethook()
+  assert(({debug.gethook()})[3] == 2^24 - 1)
+end
+
+debug.sethook()
+
+
+-- tests for tail calls
+local function f (x)
+  if x then
+    assert(debug.getinfo(1, "S").what == "Lua")
+    assert(debug.getinfo(1, "t").istailcall == true)
+    local tail = debug.getinfo(2)
+    assert(tail.func == g1 and tail.istailcall == true)
+    assert(debug.getinfo(3, "S").what == "main")
+    print"+"
+    end
+end
+
+function g(x) return f(x) end
+
+function g1(x) g(x) end
+
+local function h (x) local f=g1; return f(x) end
+
+h(true)
+
+local b = {}
+debug.sethook(function (e) table.insert(b, e) end, "cr")
+h(false)
+debug.sethook()
+local res = {"return",   -- first return (from sethook)
+  "call", "tail call", "call", "tail call",
+  "return", "return",
+  "call",    -- last call (to sethook)
+}
+for i = 1, #res do assert(res[i] == table.remove(b, 1)) end
+
+b = 0
+debug.sethook(function (e)
+                if e == "tail call" then
+                  b = b + 1
+                  assert(debug.getinfo(2, "t").istailcall == true)
+                else
+                  assert(debug.getinfo(2, "t").istailcall == false)
+                end
+              end, "c")
+h(false)
+debug.sethook()
+assert(b == 2)   -- two tail calls
+
+lim = _soft and 3000 or 30000
+local function foo (x)
+  if x==0 then
+    assert(debug.getinfo(2).what == "main")
+    local info = debug.getinfo(1)
+    assert(info.istailcall == true and info.func == foo)
+  else return foo(x-1)
+  end
+end
+
+foo(lim)
+
+
+print"+"
+
+
+-- testing local function information
+co = load[[
+  local A = function ()
+    return x
+  end
+  return
+]]
+
+local a = 0
+-- 'A' should be visible to debugger only after its complete definition
+debug.sethook(function (e, l)
+  if l == 3 then a = a + 1; assert(debug.getlocal(2, 1) == "(*temporary)")
+  elseif l == 4 then a = a + 1; assert(debug.getlocal(2, 1) == "A")
+  end
+end, "l")
+co()  -- run local function definition
+debug.sethook()  -- turn off hook
+assert(a == 2)   -- ensure all two lines where hooked
+
+-- testing traceback
+
+assert(debug.traceback(print) == print)
+assert(debug.traceback(print, 4) == print)
+assert(string.find(debug.traceback("hi", 4), "^hi\n"))
+assert(string.find(debug.traceback("hi"), "^hi\n"))
+assert(not string.find(debug.traceback("hi"), "'debug.traceback'"))
+assert(string.find(debug.traceback("hi", 0), "'debug.traceback'"))
+assert(string.find(debug.traceback(), "^stack traceback:\n"))
+
+do  -- C-function names in traceback
+  local st, msg = (function () return pcall end)()(debug.traceback)
+  assert(st == true and string.find(msg, "pcall"))
+end
+
+
+-- testing nparams, nups e isvararg
+local t = debug.getinfo(print, "u")
+assert(t.isvararg == true and t.nparams == 0 and t.nups == 0)
+
+t = debug.getinfo(function (a,b,c) end, "u")
+assert(t.isvararg == false and t.nparams == 3 and t.nups == 0)
+
+t = debug.getinfo(function (a,b,...) return t[a] end, "u")
+assert(t.isvararg == true and t.nparams == 2 and t.nups == 1)
+
+t = debug.getinfo(1)   -- main
+assert(t.isvararg == true and t.nparams == 0 and t.nups == 1 and
+       debug.getupvalue(t.func, 1) == "_ENV")
+
+
+-- testing debugging of coroutines
+
+local function checktraceback (co, p, level)
+  local tb = debug.traceback(co, nil, level)
+  local i = 0
+  for l in string.gmatch(tb, "[^\n]+\n?") do
+    assert(i == 0 or string.find(l, p[i]))
+    i = i+1
+  end
+  assert(p[i] == nil)
+end
+
+
+local function f (n)
+  if n > 0 then f(n-1)
+  else coroutine.yield() end
+end
+
+local co = coroutine.create(f)
+coroutine.resume(co, 3)
+checktraceback(co, {"yield", "db.lua", "db.lua", "db.lua", "db.lua"})
+checktraceback(co, {"db.lua", "db.lua", "db.lua", "db.lua"}, 1)
+checktraceback(co, {"db.lua", "db.lua", "db.lua"}, 2)
+checktraceback(co, {"db.lua"}, 4)
+checktraceback(co, {}, 40)
+
+
+co = coroutine.create(function (x)
+       local a = 1
+       coroutine.yield(debug.getinfo(1, "l"))
+       coroutine.yield(debug.getinfo(1, "l").currentline)
+       return a
+     end)
+
+local tr = {}
+local foo = function (e, l) if l then table.insert(tr, l) end end
+debug.sethook(co, foo, "lcr")
+
+local _, l = coroutine.resume(co, 10)
+local x = debug.getinfo(co, 1, "lfLS")
+assert(x.currentline == l.currentline and x.activelines[x.currentline])
+assert(type(x.func) == "function")
+for i=x.linedefined + 1, x.lastlinedefined do
+  assert(x.activelines[i])
+  x.activelines[i] = nil
+end
+assert(next(x.activelines) == nil)   -- no 'extra' elements
+assert(not debug.getinfo(co, 2))
+local a,b = debug.getlocal(co, 1, 1)
+assert(a == "x" and b == 10)
+a,b = debug.getlocal(co, 1, 2)
+assert(a == "a" and b == 1)
+debug.setlocal(co, 1, 2, "hi")
+assert(debug.gethook(co) == foo)
+assert(#tr == 2 and
+       tr[1] == l.currentline-1 and tr[2] == l.currentline)
+
+a,b,c = pcall(coroutine.resume, co)
+assert(a and b and c == l.currentline+1)
+checktraceback(co, {"yield", "in function <"})
+
+a,b = coroutine.resume(co)
+assert(a and b == "hi")
+assert(#tr == 4 and tr[4] == l.currentline+2)
+assert(debug.gethook(co) == foo)
+assert(not debug.gethook())
+checktraceback(co, {})
+
+
+-- check get/setlocal in coroutines
+co = coroutine.create(function (x)
+  local a, b = coroutine.yield(x)
+  assert(a == 100 and b == nil)
+  return x
+end)
+a, b = coroutine.resume(co, 10)
+assert(a and b == 10)
+a, b = debug.getlocal(co, 1, 1)
+assert(a == "x" and b == 10)
+assert(not debug.getlocal(co, 1, 5))
+assert(debug.setlocal(co, 1, 1, 30) == "x")
+assert(not debug.setlocal(co, 1, 5, 40))
+a, b = coroutine.resume(co, 100)
+assert(a and b == 30)
+
+
+-- check traceback of suspended (or dead with error) coroutines
+
+function f(i) if i==0 then error(i) else coroutine.yield(); f(i-1) end end
+
+co = coroutine.create(function (x) f(x) end)
+a, b = coroutine.resume(co, 3)
+t = {"'coroutine.yield'", "'f'", "in function <"}
+while coroutine.status(co) == "suspended" do
+  checktraceback(co, t)
+  a, b = coroutine.resume(co)
+  table.insert(t, 2, "'f'")   -- one more recursive call to 'f'
+end
+t[1] = "'error'"
+checktraceback(co, t)
+
+
+-- test acessing line numbers of a coroutine from a resume inside
+-- a C function (this is a known bug in Lua 5.0)
+
+local function g(x)
+    coroutine.yield(x)
+end
+
+local function f (i)
+  debug.sethook(function () end, "l")
+  for j=1,1000 do
+    g(i+j)
+  end
+end
+
+local co = coroutine.wrap(f)
+co(10)
+pcall(co)
+pcall(co)
+
+
+assert(type(debug.getregistry()) == "table")
+
+
+-- test tagmethod information
+local a = {}
+local function f (t)
+  local info = debug.getinfo(1);
+  assert(info.namewhat == "metamethod")
+  a.op = info.name
+  return info.name
+end
+setmetatable(a, {
+  __index = f; __add = f; __div = f; __mod = f; __concat = f; __pow = f;
+  __mul = f; __idiv = f; __unm = f; __len = f; __sub = f;
+  __shl = f; __shr = f; __bor = f; __bxor = f;
+  __eq = f; __le = f; __lt = f; __unm = f; __len = f; __band = f;
+  __bnot = f;
+})
+
+local b = setmetatable({}, getmetatable(a))
+
+assert(a[3] == "__index" and a^3 == "__pow" and a..a == "__concat")
+assert(a/3 == "__div" and 3%a == "__mod")
+assert(a+3 == "__add" and 3-a == "__sub" and a*3 == "__mul" and
+       -a == "__unm" and #a == "__len" and a&3 == "__band")
+assert(a|3 == "__bor" and 3~a == "__bxor" and a<<3 == "__shl" and
+       a>>1 == "__shr")
+assert (a==b and a.op == "__eq")
+assert (a>=b and a.op == "__le")
+assert (a>b and a.op == "__lt")
+assert(~a == "__bnot")
+
+do   -- testing for-iterator name
+  local function f()
+    assert(debug.getinfo(1).name == "for iterator")
+  end
+
+  for i in f do end
+end
+
+
+print("testing debug functions on chunk without debug info")
+prog = [[-- program to be loaded without debug information
+local debug = require'debug'
+local a = 12  -- a local variable
+
+local n, v = debug.getlocal(1, 1)
+assert(n == "(*temporary)" and v == debug)   -- unkown name but known value
+n, v = debug.getlocal(1, 2)
+assert(n == "(*temporary)" and v == 12)   -- unkown name but known value
+
+-- a function with an upvalue
+local f = function () local x; return a end
+n, v = debug.getupvalue(f, 1)
+assert(n == "(*no name)" and v == 12)
+assert(debug.setupvalue(f, 1, 13) == "(*no name)")
+assert(a == 13)
+
+local t = debug.getinfo(f)
+assert(t.name == nil and t.linedefined > 0 and
+       t.lastlinedefined == t.linedefined and
+       t.short_src == "?")
+assert(debug.getinfo(1).currentline == -1)
+
+t = debug.getinfo(f, "L").activelines
+assert(next(t) == nil)    -- active lines are empty
+
+-- dump/load a function without debug info
+f = load(string.dump(f))
+
+t = debug.getinfo(f)
+assert(t.name == nil and t.linedefined > 0 and
+       t.lastlinedefined == t.linedefined and
+       t.short_src == "?")
+assert(debug.getinfo(1).currentline == -1)
+
+return a
+]]
+
+
+-- load 'prog' without debug info
+local f = assert(load(string.dump(load(prog), true)))
+
+assert(f() == 13)
+
+do   -- tests for 'source' in binary dumps
+  local prog = [[
+    return function (x)
+      return function (y) 
+        return x + y
+      end
+    end
+  ]]
+  local name = string.rep("x", 1000)
+  local p = assert(load(prog, name))
+  -- load 'p' as a binary chunk with debug information
+  local c = string.dump(p)
+  assert(#c > 1000 and #c < 2000)   -- no repetition of 'source' in dump
+  local f = assert(load(c))
+  local g = f()
+  local h = g(3)
+  assert(h(5) == 8)
+  assert(debug.getinfo(f).source == name and   -- all functions have 'source'
+         debug.getinfo(g).source == name and 
+         debug.getinfo(h).source == name)
+  -- again, without debug info
+  local c = string.dump(p, true)
+  assert(#c < 500)   -- no 'source' in dump
+  local f = assert(load(c))
+  local g = f()
+  local h = g(30)
+  assert(h(50) == 80)
+  assert(debug.getinfo(f).source == '=?' and   -- no function has 'source'
+         debug.getinfo(g).source == '=?' and 
+         debug.getinfo(h).source == '=?')
+end
+
+print"OK"
+
diff --git a/lua-5.3.1-tests/errors.lua b/lua-5.3.1-tests/errors.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/errors.lua
@@ -0,0 +1,530 @@
+-- $Id: errors.lua,v 1.90 2015/04/30 14:16:36 roberto Exp $
+
+print("testing errors")
+
+local debug = require"debug"
+
+-- avoid problems with 'strict' module (which may generate other error messages)
+local mt = getmetatable(_G) or {}
+local oldmm = mt.__index
+mt.__index = nil
+
+local function checkerr (msg, f, ...)
+  local st, err = pcall(f, ...)
+  assert(not st and string.find(err, msg))
+end
+
+
+local function doit (s)
+  local f, msg = load(s)
+  if f == nil then return msg end
+  local cond, msg = pcall(f)
+  return (not cond) and msg
+end
+
+
+local function checkmessage (prog, msg)
+  local m = doit(prog)
+  assert(string.find(m, msg, 1, true))
+end
+
+local function checksyntax (prog, extra, token, line)
+  local msg = doit(prog)
+  if not string.find(token, "^<%a") and not string.find(token, "^char%(")
+    then token = "'"..token.."'" end
+  token = string.gsub(token, "(%p)", "%%%1")
+  local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]],
+                           line, token)
+  assert(string.find(msg, pt))
+  assert(string.find(msg, msg, 1, true))
+end
+
+
+-- test error message with no extra info
+assert(doit("error('hi', 0)") == 'hi')
+
+-- test error message with no info
+assert(doit("error()") == nil)
+
+
+-- test common errors/errors that crashed in the past
+assert(doit("table.unpack({}, 1, n=2^30)"))
+assert(doit("a=math.sin()"))
+assert(not doit("tostring(1)") and doit("tostring()"))
+assert(doit"tonumber()")
+assert(doit"repeat until 1; a")
+assert(doit"return;;")
+assert(doit"assert(false)")
+assert(doit"assert(nil)")
+assert(doit("function a (... , ...) end"))
+assert(doit("function a (, ...) end"))
+assert(doit("local t={}; t = t[#t] + 1"))
+
+checksyntax([[
+  local a = {4
+
+]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
+
+
+-- tests for better error messages
+
+checkmessage("a = {} + 1", "arithmetic")
+checkmessage("a = {} | 1", "bitwise operation")
+checkmessage("a = {} < 1", "attempt to compare")
+checkmessage("a = {} <= 1", "attempt to compare")
+
+checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'")
+checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'")
+checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
+assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'"))
+checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
+checkmessage("a=(1)..{}", "a table value")
+
+checkmessage("a = #print", "length of a function value")
+checkmessage("a = #3", "length of a number value")
+
+aaa = nil
+checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
+checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
+checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
+checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
+assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
+
+-- upvalues being indexed do not go to the stack
+checkmessage("local a,b,cc; (function () a = cc[1] end)()", "upvalue 'cc'")
+checkmessage("local a,b,cc; (function () a.x = 1 end)()", "upvalue 'a'")
+
+checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
+
+checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
+checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
+checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
+checkmessage("aaa={}; x=-aaa", "global 'aaa'")
+
+-- short circuit
+checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)",
+       "local 'bbbb'")
+checkmessage("a=1; local a,bbbb=2,3; a = bbbb(1) or a(3)", "local 'bbbb'")
+checkmessage("local a,b,c,f = 1,1,1; f((a and b) or c)", "local 'f'")
+checkmessage("local a,b,c = 1,1,1; ((a and b) or c)()", "call a number value")
+assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'"))
+assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'"))
+
+checkmessage("print(print < 10)", "function with number")
+checkmessage("print(print < print)", "two function values")
+checkmessage("print('10' < 10)", "string with number")
+checkmessage("print(10 < '23')", "number with string")
+
+-- float->integer conversions
+checkmessage("local a = 2.0^100; x = a << 2", "local a")
+checkmessage("local a = 1 >> 2.0^100", "has no integer representation")
+checkmessage("local a = '10' << 2.0^100", "has no integer representation")
+checkmessage("local a = 2.0^100 & 1", "has no integer representation")
+checkmessage("local a = 2.0^100 & '1'", "has no integer representation")
+checkmessage("local a = 2.0 | 1e40", "has no integer representation")
+checkmessage("local a = 2e100 ~ 1", "has no integer representation")
+checkmessage("string.sub('a', 2.0^100)", "has no integer representation")
+checkmessage("string.rep('a', 3.3)", "has no integer representation")
+checkmessage("return 6e40 & 7", "has no integer representation")
+checkmessage("return 34 << 7e30", "has no integer representation")
+checkmessage("return ~-3e40", "has no integer representation")
+checkmessage("return ~-3.009", "has no integer representation")
+checkmessage("return 3.009 & 1", "has no integer representation")
+checkmessage("return 34 >> {}", "table value")
+checkmessage("a = 24 // 0", "divide by zero")
+checkmessage("a = 1 % 0", "'n%0'")
+
+
+-- passing light userdata instead of full userdata
+_G.D = debug
+checkmessage([[
+  -- create light udata
+  local x = D.upvalueid(function () return debug end, 1)
+  D.setuservalue(x, {})
+]], "light userdata")
+_G.D = nil
+
+do   -- named userdata
+  checkmessage("math.sin(io.input())", "(number expected, got FILE*)")
+  _ENV.XX = setmetatable({}, {__name = "My Type"})
+  checkmessage("io.input(XX)", "(FILE* expected, got My Type)")
+  _ENV.XX = nil
+end
+
+-- global functions
+checkmessage("(io.write or print){}", "io.write")
+checkmessage("(collectgarbage or print){}", "collectgarbage")
+
+-- errors in functions without debug info
+do
+  local f = function (a) return a + 1 end
+  f = assert(load(string.dump(f, true)))
+  assert(f(3) == 4)
+  checkerr("^%?:%-1:", f, {})
+
+  -- code with a move to a local var ('OP_MOV A B' with A<B)
+  f = function () local a; a = {}; return a + 2 end
+  -- no debug info (so that 'a' is unknown)
+  f = assert(load(string.dump(f, true)))
+  -- symbolic execution should not get lost
+  checkerr("^%?:%-1:.*table value", f)
+end
+
+
+-- tests for field accesses after RK limit
+local t = {}
+for i = 1, 1000 do
+  t[i] = "a = x" .. i
+end
+local s = table.concat(t, "; ")
+t = nil
+checkmessage(s.."; a = bbb + 1", "global 'bbb'")
+checkmessage("local _ENV=_ENV;"..s.."; a = bbb + 1", "global 'bbb'")
+checkmessage(s.."; local t = {}; a = t.bbb + 1", "field 'bbb'")
+checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'")
+
+checkmessage([[aaa=9
+repeat until 3==3
+local x=math.sin(math.cos(3))
+if math.sin(1) == x then return math.sin(1) end   -- tail call
+local a,b = 1, {
+  {x='a'..'b'..'c', y='b', z=x},
+  {1,2,3,4,5} or 3+3<=3+3,
+  3+1>3+1,
+  {d = x and aaa[x or y]}}
+]], "global 'aaa'")
+
+checkmessage([[
+local x,y = {},1
+if math.sin(1) == 0 then return 3 end    -- return
+x.a()]], "field 'a'")
+
+checkmessage([[
+prefix = nil
+insert = nil
+while 1 do
+  local a
+  if nil then break end
+  insert(prefix, a)
+end]], "global 'insert'")
+
+checkmessage([[  -- tail call
+  return math.sin("a")
+]], "'sin'")
+
+checkmessage([[collectgarbage("nooption")]], "invalid option")
+
+checkmessage([[x = print .. "a"]], "concatenate")
+checkmessage([[x = "a" .. false]], "concatenate")
+checkmessage([[x = {} .. 2]], "concatenate")
+
+checkmessage("getmetatable(io.stdin).__gc()", "no value")
+
+checkmessage([[
+local Var
+local function main()
+  NoSuchName (function() Var=0 end)
+end
+main()
+]], "global 'NoSuchName'")
+print'+'
+
+a = {}; setmetatable(a, {__index = string})
+checkmessage("a:sub()", "bad self")
+checkmessage("string.sub('a', {})", "#2")
+checkmessage("('a'):sub{}", "#1")
+
+checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'")
+checkmessage("string.gsub('s', 's', setmetatable)", "'setmetatable'")
+
+-- tests for errors in coroutines
+
+local function f (n)
+  local c = coroutine.create(f)
+  local a,b = coroutine.resume(c)
+  return b
+end
+assert(string.find(f(), "C stack overflow"))
+
+checkmessage("coroutine.yield()", "outside a coroutine")
+
+f = coroutine.wrap(function () table.sort({1,2,3}, coroutine.yield) end)
+checkerr("yield across", f)
+
+
+-- testing size of 'source' info; size of buffer for that info is
+-- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'.
+idsize = 60 - 1
+local function checksize (source)
+  -- syntax error
+  local _, msg = load("x", source)
+  msg = string.match(msg, "^([^:]*):")   -- get source (1st part before ':')
+  assert(msg:len() <= idsize)
+end
+
+for i = 60 - 10, 60 + 10 do   -- check border cases around 60
+  checksize("@" .. string.rep("x", i))   -- file names
+  checksize(string.rep("x", i - 10))     -- string sources
+  checksize("=" .. string.rep("x", i))   -- exact sources
+end
+
+
+-- testing line error
+
+local function lineerror (s, l)
+  local err,msg = pcall(load(s))
+  local line = string.match(msg, ":(%d+):")
+  assert((line and line+0) == l)
+end
+
+lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
+lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3)
+lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4)
+lineerror("function a.x.y ()\na=a+1\nend", 1)
+
+lineerror("a = \na\n+\n{}", 3)
+lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6)
+lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3)
+
+lineerror("a\n=\n-\n\nprint\n;", 3)
+
+lineerror([[
+a
+(
+23)
+]], 1)
+
+lineerror([[
+local a = {x = 13}
+a
+.
+x
+(
+23
+)
+]], 2)
+
+lineerror([[
+local a = {x = 13}
+a
+.
+x
+(
+23 + a
+)
+]], 6)
+
+local p = [[
+  function g() f() end
+  function f(x) error('a', X) end
+g()
+]]
+X=3;lineerror((p), 3)
+X=0;lineerror((p), nil)
+X=1;lineerror((p), 2)
+X=2;lineerror((p), 1)
+
+
+if not _soft then
+  -- several tests that exaust the Lua stack
+  collectgarbage()
+  print"testing stack overflow"
+  C = 0
+  local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end
+
+  local function checkstackmessage (m)
+    return (string.find(m, "^.-:%d+: stack overflow"))
+  end
+  -- repeated stack overflows (to check stack recovery)
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+
+
+  -- error lines in stack overflow
+  C = 0
+  local l1
+  local function g(x)
+    l1 = debug.getinfo(x, "l").currentline; y()
+  end
+  local _, stackmsg = xpcall(g, debug.traceback, 1)
+  print('+')
+  local stack = {}
+  for line in string.gmatch(stackmsg, "[^\n]*") do
+    local curr = string.match(line, ":(%d+):")
+    if curr then table.insert(stack, tonumber(curr)) end
+  end
+  local i=1
+  while stack[i] ~= l1 do
+    assert(stack[i] == l)
+    i = i+1
+  end
+  assert(i > 15)
+
+
+  -- error in error handling
+  local res, msg = xpcall(error, error)
+  assert(not res and type(msg) == 'string')
+  print('+')
+
+  local function f (x)
+    if x==0 then error('a\n')
+    else
+      local aux = function () return f(x-1) end
+      local a,b = xpcall(aux, aux)
+      return a,b
+    end
+  end
+  f(3)
+
+  local function loop (x,y,z) return 1 + loop(x, y, z) end
+ 
+  local res, msg = xpcall(loop, function (m)
+    assert(string.find(m, "stack overflow"))
+    checkerr("error handling", loop)
+    assert(math.sin(0) == 0)
+    return 15
+  end)
+  assert(msg == 15)
+
+  local f = function ()
+    for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end
+  end
+  checkerr("too many results", f)
+
+end
+
+
+do
+  -- non string messages
+  local t = {}
+  local res, msg = pcall(function () error(t) end)
+  assert(not res and msg == t)
+
+  res, msg = pcall(function () error(nil) end)
+  assert(not res and msg == nil)
+
+  local function f() error{msg='x'} end
+  res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
+  assert(msg.msg == 'xy')
+
+  -- 'assert' with extra arguments
+  res, msg = pcall(assert, false, "X", t)
+  assert(not res and msg == "X")
+ 
+  -- 'assert' with no message
+  res, msg = pcall(function () assert(false) end)
+  local line = string.match(msg, "%w+%.lua:(%d+): assertion failed!$")
+  assert(tonumber(line) == debug.getinfo(1, "l").currentline - 2)
+
+  -- 'assert' with non-string messages
+  res, msg = pcall(assert, false, t)
+  assert(not res and msg == t)
+
+  res, msg = pcall(assert, nil, nil)
+  assert(not res and msg == nil)
+
+  -- 'assert' without arguments
+  res, msg = pcall(assert)
+  assert(not res and string.find(msg, "value expected"))
+end
+
+-- xpcall with arguments
+a, b, c = xpcall(string.find, error, "alo", "al")
+assert(a and b == 1 and c == 2)
+a, b, c = xpcall(string.find, function (x) return {} end, true, "al")
+assert(not a and type(b) == "table" and c == nil)
+
+
+print("testing tokens in error messages")
+checksyntax("syntax error", "", "error", 1)
+checksyntax("1.000", "", "1.000", 1)
+checksyntax("[[a]]", "", "[[a]]", 1)
+checksyntax("'aa'", "", "'aa'", 1)
+checksyntax("while << do end", "", "<<", 1)
+checksyntax("for >> do end", "", ">>", 1)
+
+-- test invalid non-printable char in a chunk
+checksyntax("a\1a = 1", "", "<\\1>", 1)
+
+-- test 255 as first char in a chunk
+checksyntax("\255a = 1", "", "<\\255>", 1)
+
+doit('I = load("a=9+"); a=3')
+assert(a==3 and I == nil)
+print('+')
+
+lim = 1000
+if _soft then lim = 100 end
+for i=1,lim do
+  doit('a = ')
+  doit('a = 4+nil')
+end
+
+
+-- testing syntax limits
+
+local maxClevel = 200    -- LUAI_MAXCCALLS (in llimits.h)
+
+local function testrep (init, rep, close, repc)
+  local s = "local a; "..init .. string.rep(rep, maxClevel - 10) .. close ..
+               string.rep(repc, maxClevel - 10)
+  assert(load(s))   -- 190 levels is OK
+  s = "local a; "..init .. string.rep(rep, maxClevel + 1)
+  checkmessage(s, "too many C levels")
+end
+
+testrep("a", ",a", "= 1", ",1")    -- multiple assignment
+testrep("a=", "{", "0", "}")
+testrep("a=", "(", "2", ")")
+testrep("", "a(", "2", ")")
+testrep("", "do ", "", " end")
+testrep("", "while a do ", "", " end")
+testrep("", "if a then else ", "", " end")
+testrep("", "function foo () ", "", " end")
+testrep("a=", "a..", "a", "")
+testrep("a=", "a^", "a", "")
+
+checkmessage("a = f(x" .. string.rep(",x", 260) .. ")", "too many registers")
+
+
+-- testing other limits
+
+-- upvalues
+local lim = 127
+local  s = "local function fooA ()\n  local "
+for j = 1,lim do
+  s = s.."a"..j..", "
+end
+s = s.."b,c\n"
+s = s.."local function fooB ()\n  local "
+for j = 1,lim do
+  s = s.."b"..j..", "
+end
+s = s.."b\n"
+s = s.."function fooC () return b+c"
+local c = 1+2
+for j = 1,lim do
+  s = s.."+a"..j.."+b"..j
+  c = c + 2
+end
+s = s.."\nend  end end"
+local a,b = load(s)
+assert(c > 255 and string.find(b, "too many upvalues") and
+       string.find(b, "line 5"))
+
+-- local variables
+s = "\nfunction foo ()\n  local "
+for j = 1,300 do
+  s = s.."a"..j..", "
+end
+s = s.."b\n"
+local a,b = load(s)
+assert(string.find(b, "line 2") and string.find(b, "too many local variables"))
+
+mt.__index = oldmm
+
+print('OK')
diff --git a/lua-5.3.1-tests/events.lua b/lua-5.3.1-tests/events.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/events.lua
@@ -0,0 +1,443 @@
+-- $Id: events.lua,v 1.41 2014/12/26 17:20:53 roberto Exp $
+
+print('testing metatables')
+
+local debug = require'debug'
+
+X = 20; B = 30
+
+_ENV = setmetatable({}, {__index=_G})
+
+collectgarbage()
+
+X = X+10
+assert(X == 30 and _G.X == 20)
+B = false
+assert(B == false)
+B = nil
+assert(B == 30)
+
+assert(getmetatable{} == nil)
+assert(getmetatable(4) == nil)
+assert(getmetatable(nil) == nil)
+a={}; setmetatable(a, {__metatable = "xuxu",
+                    __tostring=function(x) return x.name end})
+assert(getmetatable(a) == "xuxu")
+assert(tostring(a) == nil)
+-- cannot change a protected metatable
+assert(pcall(setmetatable, a, {}) == false)
+a.name = "gororoba"
+assert(tostring(a) == "gororoba")
+
+local a, t = {10,20,30; x="10", y="20"}, {}
+assert(setmetatable(a,t) == a)
+assert(getmetatable(a) == t)
+assert(setmetatable(a,nil) == a)
+assert(getmetatable(a) == nil)
+assert(setmetatable(a,t) == a)
+
+
+function f (t, i, e)
+  assert(not e)
+  local p = rawget(t, "parent")
+  return (p and p[i]+3), "dummy return"
+end
+
+t.__index = f
+
+a.parent = {z=25, x=12, [4] = 24}
+assert(a[1] == 10 and a.z == 28 and a[4] == 27 and a.x == "10")
+
+collectgarbage()
+
+a = setmetatable({}, t)
+function f(t, i, v) rawset(t, i, v-3) end
+setmetatable(t, t)   -- causes a bug in 5.1 !
+t.__newindex = f
+a[1] = 30; a.x = "101"; a[5] = 200
+assert(a[1] == 27 and a.x == 98 and a[5] == 197)
+
+
+local c = {}
+a = setmetatable({}, t)
+t.__newindex = c
+a[1] = 10; a[2] = 20; a[3] = 90
+assert(c[1] == 10 and c[2] == 20 and c[3] == 90)
+
+
+do
+  local a;
+  a = setmetatable({}, {__index = setmetatable({},
+                     {__index = setmetatable({},
+                     {__index = function (_,n) return a[n-3]+4, "lixo" end})})})
+  a[0] = 20
+  for i=0,10 do
+    assert(a[i*3] == 20 + i*4)
+  end
+end
+
+
+do  -- newindex
+  local foi
+  local a = {}
+  for i=1,10 do a[i] = 0; a['a'..i] = 0; end
+  setmetatable(a, {__newindex = function (t,k,v) foi=true; rawset(t,k,v) end})
+  foi = false; a[1]=0; assert(not foi)
+  foi = false; a['a1']=0; assert(not foi)
+  foi = false; a['a11']=0; assert(foi)
+  foi = false; a[11]=0; assert(foi)
+  foi = false; a[1]=nil; assert(not foi)
+  foi = false; a[1]=nil; assert(foi)
+end
+
+
+setmetatable(t, nil)
+function f (t, ...) return t, {...} end
+t.__call = f
+
+do
+  local x,y = a(table.unpack{'a', 1})
+  assert(x==a and y[1]=='a' and y[2]==1 and y[3]==nil)
+  x,y = a()
+  assert(x==a and y[1]==nil)
+end
+
+
+local b = setmetatable({}, t)
+setmetatable(b,t)
+
+function f(op)
+  return function (...) cap = {[0] = op, ...} ; return (...) end
+end
+t.__add = f("add")
+t.__sub = f("sub")
+t.__mul = f("mul")
+t.__div = f("div")
+t.__idiv = f("idiv")
+t.__mod = f("mod")
+t.__unm = f("unm")
+t.__pow = f("pow")
+t.__len = f("len")
+t.__band = f("band")
+t.__bor = f("bor")
+t.__bxor = f("bxor")
+t.__shl = f("shl")
+t.__shr = f("shr")
+t.__bnot = f("bnot")
+
+assert(b+5 == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == 5 and cap[3]==nil)
+assert(b+'5' == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == '5' and cap[3]==nil)
+assert(5+b == 5)
+assert(cap[0] == "add" and cap[1] == 5 and cap[2] == b and cap[3]==nil)
+assert('5'+b == '5')
+assert(cap[0] == "add" and cap[1] == '5' and cap[2] == b and cap[3]==nil)
+b=b-3; assert(getmetatable(b) == t)
+assert(5-a == 5)
+assert(cap[0] == "sub" and cap[1] == 5 and cap[2] == a and cap[3]==nil)
+assert('5'-a == '5')
+assert(cap[0] == "sub" and cap[1] == '5' and cap[2] == a and cap[3]==nil)
+assert(a*a == a)
+assert(cap[0] == "mul" and cap[1] == a and cap[2] == a and cap[3]==nil)
+assert(a/0 == a)
+assert(cap[0] == "div" and cap[1] == a and cap[2] == 0 and cap[3]==nil)
+assert(a%2 == a)
+assert(cap[0] == "mod" and cap[1] == a and cap[2] == 2 and cap[3]==nil)
+assert(a // (1/0) == a)
+assert(cap[0] == "idiv" and cap[1] == a and cap[2] == 1/0 and cap[3]==nil)
+assert(a & "hi" == a)
+assert(cap[0] == "band" and cap[1] == a and cap[2] == "hi" and cap[3]==nil)
+assert(a | "hi" == a)
+assert(cap[0] == "bor" and cap[1] == a and cap[2] == "hi" and cap[3]==nil)
+assert("hi" ~ a == "hi")
+assert(cap[0] == "bxor" and cap[1] == "hi" and cap[2] == a and cap[3]==nil)
+assert(-a == a)
+assert(cap[0] == "unm" and cap[1] == a)
+assert(a^4 == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == 4 and cap[3]==nil)
+assert(a^'4' == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == '4' and cap[3]==nil)
+assert(4^a == 4)
+assert(cap[0] == "pow" and cap[1] == 4 and cap[2] == a and cap[3]==nil)
+assert('4'^a == '4')
+assert(cap[0] == "pow" and cap[1] == '4' and cap[2] == a and cap[3]==nil)
+assert(#a == a)
+assert(cap[0] == "len" and cap[1] == a)
+assert(~a == a)
+assert(cap[0] == "bnot" and cap[1] == a)
+assert(a << 3 == a)
+assert(cap[0] == "shl" and cap[1] == a and cap[2] == 3)
+assert(1.5 >> a == 1.5)
+assert(cap[0] == "shr" and cap[1] == 1.5 and cap[2] == a)
+
+
+-- test for rawlen
+t = setmetatable({1,2,3}, {__len = function () return 10 end})
+assert(#t == 10 and rawlen(t) == 3)
+assert(rawlen"abc" == 3)
+assert(not pcall(rawlen, io.stdin))
+assert(not pcall(rawlen, 34))
+assert(not pcall(rawlen))
+
+t = {}
+t.__lt = function (a,b,c)
+  collectgarbage()
+  assert(c == nil)
+  if type(a) == 'table' then a = a.x end
+  if type(b) == 'table' then b = b.x end
+ return a<b, "dummy"
+end
+
+function Op(x) return setmetatable({x=x}, t) end
+
+local function test ()
+  assert(not(Op(1)<Op(1)) and (Op(1)<Op(2)) and not(Op(2)<Op(1)))
+  assert(not(1 < Op(1)) and (Op(1) < 2) and not(2 < Op(1)))
+  assert(not(Op('a')<Op('a')) and (Op('a')<Op('b')) and not(Op('b')<Op('a')))
+  assert(not('a' < Op('a')) and (Op('a') < 'b') and not(Op('b') < Op('a')))
+  assert((Op(1)<=Op(1)) and (Op(1)<=Op(2)) and not(Op(2)<=Op(1)))
+  assert((Op('a')<=Op('a')) and (Op('a')<=Op('b')) and not(Op('b')<=Op('a')))
+  assert(not(Op(1)>Op(1)) and not(Op(1)>Op(2)) and (Op(2)>Op(1)))
+  assert(not(Op('a')>Op('a')) and not(Op('a')>Op('b')) and (Op('b')>Op('a')))
+  assert((Op(1)>=Op(1)) and not(Op(1)>=Op(2)) and (Op(2)>=Op(1)))
+  assert((1 >= Op(1)) and not(1 >= Op(2)) and (Op(2) >= 1))
+  assert((Op('a')>=Op('a')) and not(Op('a')>=Op('b')) and (Op('b')>=Op('a')))
+  assert(('a' >= Op('a')) and not(Op('a') >= 'b') and (Op('b') >= Op('a')))
+end
+
+test()
+
+t.__le = function (a,b,c)
+  assert(c == nil)
+  if type(a) == 'table' then a = a.x end
+  if type(b) == 'table' then b = b.x end
+ return a<=b, "dummy"
+end
+
+test()  -- retest comparisons, now using both `lt' and `le'
+
+
+-- test `partial order'
+
+local function rawSet(x)
+  local y = {}
+  for _,k in pairs(x) do y[k] = 1 end
+  return y
+end
+
+local function Set(x)
+  return setmetatable(rawSet(x), t)
+end
+
+t.__lt = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+    b[k] = nil
+  end
+  return next(b) ~= nil
+end
+
+t.__le = nil
+
+assert(Set{1,2,3} < Set{1,2,3,4})
+assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
+assert((Set{1,2,3,4} <= Set{1,2,3,4}))
+assert((Set{1,2,3,4} >= Set{1,2,3,4}))
+assert((Set{1,3} <= Set{3,5}))   -- wrong!! model needs a `le' method ;-)
+
+t.__le = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+  end
+  return true
+end
+
+assert(not (Set{1,3} <= Set{3,5}))   -- now its OK!
+assert(not(Set{1,3} <= Set{3,5}))
+assert(not(Set{1,3} >= Set{3,5}))
+
+t.__eq = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+    b[k] = nil
+  end
+  return next(b) == nil
+end
+
+local s = Set{1,3,5}
+assert(s == Set{3,5,1})
+assert(not rawequal(s, Set{3,5,1}))
+assert(rawequal(s, s))
+assert(Set{1,3,5,1} == rawSet{3,5,1})
+assert(rawSet{1,3,5,1} == Set{3,5,1})
+assert(Set{1,3,5} ~= Set{3,5,1,6})
+
+-- '__eq' is not used for table accesses
+t[Set{1,3,5}] = 1
+assert(t[Set{1,3,5}] == nil)
+
+
+if not T then
+  (Message or print)('\n >>> testC not active: skipping tests for \z
+userdata equality <<<\n')
+else
+  local u1 = T.newuserdata(0)
+  local u2 = T.newuserdata(0)
+  local u3 = T.newuserdata(0)
+  assert(u1 ~= u2 and u1 ~= u3)
+  debug.setuservalue(u1, 1);
+  debug.setuservalue(u2, 2);
+  debug.setuservalue(u3, 1);
+  debug.setmetatable(u1, {__eq = function (a, b)
+    return debug.getuservalue(a) == debug.getuservalue(b)
+  end})
+  debug.setmetatable(u2, {__eq = function (a, b)
+    return true
+  end})
+  assert(u1 == u3 and u3 == u1 and u1 ~= u2)
+  assert(u2 == u1 and u2 == u3 and u3 == u2)
+  assert(u2 ~= {})   -- different types cannot be equal
+end
+
+
+t.__concat = function (a,b,c)
+  assert(c == nil)
+  if type(a) == 'table' then a = a.val end
+  if type(b) == 'table' then b = b.val end
+  if A then return a..b
+  else
+    return setmetatable({val=a..b}, t)
+  end
+end
+
+c = {val="c"}; setmetatable(c, t)
+d = {val="d"}; setmetatable(d, t)
+
+A = true
+assert(c..d == 'cd')
+assert(0 .."a".."b"..c..d.."e".."f"..(5+3).."g" == "0abcdef8g")
+
+A = false
+assert((c..d..c..d).val == 'cdcd')
+x = c..d
+assert(getmetatable(x) == t and x.val == 'cd')
+x = 0 .."a".."b"..c..d.."e".."f".."g"
+assert(x.val == "0abcdefg")
+
+
+-- concat metamethod x numbers (bug in 5.1.1)
+c = {}
+local x
+setmetatable(c, {__concat = function (a,b)
+  assert(type(a) == "number" and b == c or type(b) == "number" and a == c)
+  return c
+end})
+assert(c..5 == c and 5 .. c == c)
+assert(4 .. c .. 5 == c and 4 .. 5 .. 6 .. 7 .. c == c)
+
+
+-- test comparison compatibilities
+local t1, t2, c, d
+t1 = {};  c = {}; setmetatable(c, t1)
+d = {}
+t1.__eq = function () return true end
+t1.__lt = function () return true end
+setmetatable(d, t1)
+assert(c == d and c < d and not(d <= c))
+t2 = {}
+t2.__eq = t1.__eq
+t2.__lt = t1.__lt
+setmetatable(d, t2)
+assert(c == d and c < d and not(d <= c))
+
+
+
+-- test for several levels of calls
+local i
+local tt = {
+  __call = function (t, ...)
+    i = i+1
+    if t.f then return t.f(...)
+    else return {...}
+    end
+  end
+}
+
+local a = setmetatable({}, tt)
+local b = setmetatable({f=a}, tt)
+local c = setmetatable({f=b}, tt)
+
+i = 0
+x = c(3,4,5)
+assert(i == 3 and x[1] == 3 and x[3] == 5)
+
+
+assert(_G.X == 20)
+
+print'+'
+
+local _g = _G
+_ENV = setmetatable({}, {__index=function (_,k) return _g[k] end})
+
+
+a = {}
+rawset(a, "x", 1, 2, 3)
+assert(a.x == 1 and rawget(a, "x", 3) == 1)
+
+print '+'
+
+-- testing metatables for basic types
+mt = {__index = function (a,b) return a+b end,
+      __len = function (x) return math.floor(x) end}
+debug.setmetatable(10, mt)
+assert(getmetatable(-2) == mt)
+assert((10)[3] == 13)
+assert((10)["3"] == 13)
+assert(#3.45 == 3)
+debug.setmetatable(23, nil)
+assert(getmetatable(-2) == nil)
+
+debug.setmetatable(true, mt)
+assert(getmetatable(false) == mt)
+mt.__index = function (a,b) return a or b end
+assert((true)[false] == true)
+assert((false)[false] == false)
+debug.setmetatable(false, nil)
+assert(getmetatable(true) == nil)
+
+debug.setmetatable(nil, mt)
+assert(getmetatable(nil) == mt)
+mt.__add = function (a,b) return (a or 0) + (b or 0) end
+assert(10 + nil == 10)
+assert(nil + 23 == 23)
+assert(nil + nil == 0)
+debug.setmetatable(nil, nil)
+assert(getmetatable(nil) == nil)
+
+debug.setmetatable(nil, {})
+
+
+-- loops in delegation
+a = {}; setmetatable(a, a); a.__index = a; a.__newindex = a
+assert(not pcall(function (a,b) return a[b] end, a, 10))
+assert(not pcall(function (a,b,c) a[b] = c end, a, 10, true))
+
+-- bug in 5.1
+T, K, V = nil
+grandparent = {}
+grandparent.__newindex = function(t,k,v) T=t; K=k; V=v end
+
+parent = {}
+parent.__newindex = parent
+setmetatable(parent, grandparent)
+
+child = setmetatable({}, parent)
+child.foo = 10      --> CRASH (on some machines)
+assert(T == parent and K == "foo" and V == 10)
+
+print 'OK'
+
+return 12
+
+
diff --git a/lua-5.3.1-tests/files.lua b/lua-5.3.1-tests/files.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/files.lua
@@ -0,0 +1,721 @@
+-- $Id: files.lua,v 1.88 2015/05/15 12:29:29 roberto Exp $
+
+local debug = require "debug"
+
+assert(type(os.getenv"PATH") == "string")
+
+assert(io.input(io.stdin) == io.stdin)
+assert(not pcall(io.input, "non-existent-file"))
+assert(io.output(io.stdout) == io.stdout)
+
+local function checkerr (msg, f, ...)
+  local stat, err = pcall(f, ...)
+  assert(not stat and string.find(err, msg))
+end
+
+
+-- cannot close standard files
+assert(not io.close(io.stdin) and
+       not io.stdout:close() and
+       not io.stderr:close())
+
+
+assert(type(io.input()) == "userdata" and io.type(io.output()) == "file")
+assert(type(io.stdin) == "userdata" and io.type(io.stderr) == "file")
+assert(not io.type(8))
+local a = {}; setmetatable(a, {})
+assert(not io.type(a))
+
+assert(getmetatable(io.input()).__name == "FILE*")
+
+local a,b,c = io.open('xuxu_nao_existe')
+assert(not a and type(b) == "string" and type(c) == "number")
+
+a,b,c = io.open('/a/b/c/d', 'w')
+assert(not a and type(b) == "string" and type(c) == "number")
+
+local file = os.tmpname()
+local f, msg = io.open(file, "w")
+if not f then
+  (Message or print)("'os.tmpname' file cannot be open; skipping file tests")
+
+else  --{  most tests here need tmpname
+f:close()
+
+print('testing i/o')
+
+local otherfile = os.tmpname()
+
+checkerr("invalid mode", io.open, file, "rw")
+checkerr("invalid mode", io.open, file, "rb+")
+checkerr("invalid mode", io.open, file, "r+bk")
+checkerr("invalid mode", io.open, file, "")
+checkerr("invalid mode", io.open, file, "+")
+checkerr("invalid mode", io.open, file, "b")
+assert(io.open(file, "r+b")):close()
+assert(io.open(file, "r+")):close()
+assert(io.open(file, "rb")):close()
+
+assert(os.setlocale('C', 'all'))
+
+io.input(io.stdin); io.output(io.stdout);
+
+os.remove(file)
+assert(not loadfile(file))
+checkerr("", dofile, file)
+assert(not io.open(file))
+io.output(file)
+assert(io.output() ~= io.stdout)
+
+if not _port then   -- invalid seek
+  local status, msg, code = io.stdin:seek("set", 1000)
+  assert(not status and type(msg) == "string" and type(code) == "number")
+end
+
+assert(io.output():seek() == 0)
+assert(io.write("alo alo"):seek() == string.len("alo alo"))
+assert(io.output():seek("cur", -3) == string.len("alo alo")-3)
+assert(io.write("joao"))
+assert(io.output():seek("end") == string.len("alo joao"))
+
+assert(io.output():seek("set") == 0)
+
+assert(io.write('"álo"', "{a}\n", "second line\n", "third line \n"))
+assert(io.write('çfourth_line'))
+io.output(io.stdout)
+collectgarbage()  -- file should be closed by GC
+assert(io.input() == io.stdin and rawequal(io.output(), io.stdout))
+print('+')
+
+-- test GC for files
+collectgarbage()
+for i=1,120 do
+  for i=1,5 do
+    io.input(file)
+    assert(io.open(file, 'r'))
+    io.lines(file)
+  end
+  collectgarbage()
+end
+
+io.input():close()
+io.close()
+
+assert(os.rename(file, otherfile))
+assert(not os.rename(file, otherfile))
+
+io.output(io.open(otherfile, "ab"))
+assert(io.write("\n\n\t\t  ", 3450, "\n"));
+io.close()
+
+-- test writing/reading numbers
+local largeint = math.maxinteger
+f = assert(io.open(file, "w"))
+f:write(largeint, '\n')
+f:write(string.format("0X%x\n", largeint))
+f:write("0xABCp-3", '\n')
+f:write(0, '\n')
+f:write(-largeint, '\n')
+f:write(string.format("0x%X\n", -largeint))
+f:write("-0xABCp-3", '\n')
+assert(f:close())
+f = assert(io.open(file, "r"))
+assert(f:read("n") == largeint)
+assert(f:read("n") == largeint)
+assert(f:read("n") == 0xABCp-3)
+assert(f:read("n") == 0)
+assert(f:read("*n") == -largeint)            -- test old format (with '*')
+assert(f:read("n") == -largeint)
+assert(f:read("*n") == -0xABCp-3)            -- test old format (with '*')
+assert(f:close())
+assert(os.remove(file))
+
+
+f = assert(io.open(file, "w"))
+-- test number termination
+f:write[[
+-12.3-	-0xffff+  .3|5.E-3X  +234e+13E 0xDEADBEEFDEADBEEFx
+0x1.13Ap+3e
+]]
+-- very long number
+f:write("1234"); for i = 1, 1000 do f:write("0") end;  f:write("\n")
+-- invalid sequences (must read and discard valid prefixes)
+f:write[[
+.e+	0.e;	--;  0xX;
+]]
+assert(f:close())
+f = assert(io.open(file, "r"))
+assert(f:read("n") == -12.3); assert(f:read(1) == "-")
+assert(f:read("n") == -0xffff); assert(f:read(2) == "+ ")
+assert(f:read("n") == 0.3); assert(f:read(1) == "|")
+assert(f:read("n") == 5e-3); assert(f:read(1) == "X")
+assert(f:read("n") == 234e13); assert(f:read(1) == "E")
+assert(f:read("n") == 0Xdeadbeefdeadbeef); assert(f:read(2) == "x\n")
+assert(f:read("n") == 0x1.13aP3); assert(f:read(1) == "e")
+
+do   -- attempt to read too long number
+  assert(f:read("n") == nil)  -- fails
+  local s = f:read("L")   -- read rest of line
+  assert(string.find(s, "^00*\n$"))  -- lots of 0's left
+end
+
+assert(not f:read("n")); assert(f:read(2) == "e+")
+assert(not f:read("n")); assert(f:read(1) == ";")
+assert(not f:read("n")); assert(f:read(2) == "-;")
+assert(not f:read("n")); assert(f:read(1) == "X")
+assert(not f:read("n")); assert(f:read(1) == ";")
+assert(not f:read("n")); assert(not f:read(0))   -- end of file
+assert(f:close())
+assert(os.remove(file))
+
+
+-- test line generators
+assert(not pcall(io.lines, "non-existent-file"))
+assert(os.rename(otherfile, file))
+io.output(otherfile)
+local n = 0
+local f = io.lines(file)
+while f() do n = n + 1 end;
+assert(n == 6)   -- number of lines in the file
+checkerr("file is already closed", f)
+checkerr("file is already closed", f)
+-- copy from file to otherfile
+n = 0
+for l in io.lines(file) do io.write(l, "\n"); n = n + 1 end
+io.close()
+assert(n == 6)
+-- copy from otherfile back to file
+local f = assert(io.open(otherfile))
+assert(io.type(f) == "file")
+io.output(file)
+assert(not io.output():read())
+n = 0
+for l in f:lines() do io.write(l, "\n"); n = n + 1 end
+assert(tostring(f):sub(1, 5) == "file ")
+assert(f:close()); io.close()
+assert(n == 6)
+checkerr("closed file", io.close, f)
+assert(tostring(f) == "file (closed)")
+assert(io.type(f) == "closed file")
+io.input(file)
+f = io.open(otherfile):lines()
+n = 0
+for l in io.lines() do assert(l == f()); n = n + 1 end
+f = nil; collectgarbage()
+assert(n == 6)
+assert(os.remove(otherfile))
+
+io.input(file)
+do  -- test error returns
+  local a,b,c = io.input():write("xuxu")
+  assert(not a and type(b) == "string" and type(c) == "number")
+end
+checkerr("invalid format", io.read, "x")
+assert(io.read(0) == "")   -- not eof
+assert(io.read(5, 'l') == '"álo"')
+assert(io.read(0) == "")
+assert(io.read() == "second line")
+local x = io.input():seek()
+assert(io.read() == "third line ")
+assert(io.input():seek("set", x))
+assert(io.read('L') == "third line \n")
+assert(io.read(1) == "ç")
+assert(io.read(string.len"fourth_line") == "fourth_line")
+assert(io.input():seek("cur", -string.len"fourth_line"))
+assert(io.read() == "fourth_line")
+assert(io.read() == "")  -- empty line
+assert(io.read('n') == 3450)
+assert(io.read(1) == '\n')
+assert(io.read(0) == nil)  -- end of file
+assert(io.read(1) == nil)  -- end of file
+assert(io.read(30000) == nil)  -- end of file
+assert(({io.read(1)})[2] == nil)
+assert(io.read() == nil)  -- end of file
+assert(({io.read()})[2] == nil)
+assert(io.read('n') == nil)  -- end of file
+assert(({io.read('n')})[2] == nil)
+assert(io.read('a') == '')  -- end of file (OK for 'a')
+assert(io.read('a') == '')  -- end of file (OK for 'a')
+collectgarbage()
+print('+')
+io.close(io.input())
+checkerr(" input file is closed", io.read)
+
+assert(os.remove(file))
+
+local t = '0123456789'
+for i=1,10 do t = t..t; end
+assert(string.len(t) == 10*2^10)
+
+io.output(file)
+io.write("alo"):write("\n")
+io.close()
+checkerr(" output file is closed", io.write)
+local f = io.open(file, "a+b")
+io.output(f)
+collectgarbage()
+
+assert(io.write(' ' .. t .. ' '))
+assert(io.write(';', 'end of file\n'))
+f:flush(); io.flush()
+f:close()
+print('+')
+
+io.input(file)
+assert(io.read() == "alo")
+assert(io.read(1) == ' ')
+assert(io.read(string.len(t)) == t)
+assert(io.read(1) == ' ')
+assert(io.read(0))
+assert(io.read('a') == ';end of file\n')
+assert(io.read(0) == nil)
+assert(io.close(io.input()))
+
+
+-- test errors in read/write
+do
+  local function ismsg (m)
+    -- error message is not a code number
+    return (type(m) == "string" and tonumber(m) == nil)
+  end
+
+  -- read
+  local f = io.open(file, "w")
+  local r, m, c = f:read()
+  assert(not r and ismsg(m) and type(c) == "number")
+  assert(f:close())
+  -- write
+  f = io.open(file, "r")
+  r, m, c = f:write("whatever")
+  assert(not r and ismsg(m) and type(c) == "number")
+  assert(f:close())
+  -- lines
+  f = io.open(file, "w")
+  r, m = pcall(f:lines())
+  assert(r == false and ismsg(m))
+  assert(f:close())
+end
+
+assert(os.remove(file))
+
+-- test for L format
+io.output(file); io.write"\n\nline\nother":close()
+io.input(file)
+assert(io.read"L" == "\n")
+assert(io.read"L" == "\n")
+assert(io.read"L" == "line\n")
+assert(io.read"L" == "other")
+assert(io.read"L" == nil)
+io.input():close()
+
+local f = assert(io.open(file))
+local s = ""
+for l in f:lines("L") do s = s .. l end
+assert(s == "\n\nline\nother")
+f:close()
+
+io.input(file)
+s = ""
+for l in io.lines(nil, "L") do s = s .. l end
+assert(s == "\n\nline\nother")
+io.input():close()
+
+s = ""
+for l in io.lines(file, "L") do s = s .. l end
+assert(s == "\n\nline\nother")
+
+s = ""
+for l in io.lines(file, "l") do s = s .. l end
+assert(s == "lineother")
+
+io.output(file); io.write"a = 10 + 34\na = 2*a\na = -a\n":close()
+local t = {}
+load(io.lines(file, "L"), nil, nil, t)()
+assert(t.a == -((10 + 34) * 2))
+
+
+-- test for multipe arguments in 'lines'
+io.output(file); io.write"0123456789\n":close()
+for a,b in io.lines(file, 1, 1) do
+  if a == "\n" then assert(b == nil)
+  else assert(tonumber(a) == tonumber(b) - 1)
+  end
+end
+
+for a,b,c in io.lines(file, 1, 2, "a") do
+  assert(a == "0" and b == "12" and c == "3456789\n")
+end
+
+for a,b,c in io.lines(file, "a", 0, 1) do
+  if a == "" then break end
+  assert(a == "0123456789\n" and b == nil and c == nil)
+end
+collectgarbage()   -- to close file in previous iteration
+
+io.output(file); io.write"00\n10\n20\n30\n40\n":close()
+for a, b in io.lines(file, "n", "n") do
+  if a == 40 then assert(b == nil)
+  else assert(a == b - 10)
+  end
+end
+
+
+-- test load x lines
+io.output(file);
+io.write[[
+local y
+= X
+X =
+X *
+2 +
+X;
+X =
+X
+-                                   y;
+]]:close()
+_G.X = 1
+assert(not load(io.lines(file)))
+collectgarbage()   -- to close file in previous iteration
+load(io.lines(file, "L"))()
+assert(_G.X == 2)
+load(io.lines(file, 1))()
+assert(_G.X == 4)
+load(io.lines(file, 3))()
+assert(_G.X == 8)
+
+print('+')
+
+local x1 = "string\n\n\\com \"\"''coisas [[estranhas]] ]]'"
+io.output(file)
+assert(io.write(string.format("x2 = %q\n-- comment without ending EOS", x1)))
+io.close()
+assert(loadfile(file))()
+assert(x1 == x2)
+print('+')
+assert(os.remove(file))
+assert(not os.remove(file))
+assert(not os.remove(otherfile))
+
+-- testing loadfile
+local function testloadfile (s, expres)
+  io.output(file)
+  if s then io.write(s) end
+  io.close()
+  local res = assert(loadfile(file))()
+  assert(os.remove(file))
+  assert(res == expres)
+end
+
+-- loading empty file
+testloadfile(nil, nil)
+
+-- loading file with initial comment without end of line
+testloadfile("# a non-ending comment", nil)
+
+
+-- checking Unicode BOM in files
+testloadfile("\xEF\xBB\xBF# some comment\nreturn 234", 234)
+testloadfile("\xEF\xBB\xBFreturn 239", 239)
+testloadfile("\xEF\xBB\xBF", nil)   -- empty file with a BOM
+
+
+-- checking line numbers in files with initial comments
+testloadfile("# a comment\nreturn require'debug'.getinfo(1).currentline", 2)
+
+
+-- loading binary file
+io.output(io.open(file, "wb"))
+assert(io.write(string.dump(function () return 10, '\0alo\255', 'hi' end)))
+io.close()
+a, b, c = assert(loadfile(file))()
+assert(a == 10 and b == "\0alo\255" and c == "hi")
+assert(os.remove(file))
+
+-- bug in 5.2.1
+do
+  io.output(io.open(file, "wb"))
+  -- save function with no upvalues
+  assert(io.write(string.dump(function () return 1 end)))
+  io.close()
+  f = assert(loadfile(file, "b", {}))
+  assert(type(f) == "function" and f() == 1)
+  assert(os.remove(file))
+end
+
+-- loading binary file with initial comment
+io.output(io.open(file, "wb"))
+assert(io.write("#this is a comment for a binary file\0\n",
+                string.dump(function () return 20, '\0\0\0' end)))
+io.close()
+a, b, c = assert(loadfile(file))()
+assert(a == 20 and b == "\0\0\0" and c == nil)
+assert(os.remove(file))
+
+
+-- 'loadfile' with 'env'
+do
+  local f = io.open(file, 'w')
+  f:write[[
+    if (...) then a = 15; return b, c, d
+    else return _ENV
+    end
+  ]]
+  f:close()
+  local t = {b = 12, c = "xuxu", d = print}
+  local f = assert(loadfile(file, 't', t))
+  local b, c, d = f(1)
+  assert(t.a == 15 and b == 12 and c == t.c and d == print)
+  assert(f() == t)
+  f = assert(loadfile(file, 't', nil))
+  assert(f() == nil)
+  f = assert(loadfile(file))
+  assert(f() == _G)
+  assert(os.remove(file))
+end
+
+
+-- 'loadfile' x modes
+do
+  io.open(file, 'w'):write("return 10"):close()
+  local s, m = loadfile(file, 'b')
+  assert(not s and string.find(m, "a text chunk"))
+  io.open(file, 'w'):write("\27 return 10"):close()
+  local s, m = loadfile(file, 't')
+  assert(not s and string.find(m, "a binary chunk"))
+  assert(os.remove(file))
+end
+
+
+io.output(file)
+assert(io.write("qualquer coisa\n"))
+assert(io.write("mais qualquer coisa"))
+io.close()
+assert(io.output(assert(io.open(otherfile, 'wb')))
+       :write("outra coisa\0\1\3\0\0\0\0\255\0")
+       :close())
+
+local filehandle = assert(io.open(file, 'r+'))
+local otherfilehandle = assert(io.open(otherfile, 'rb'))
+assert(filehandle ~= otherfilehandle)
+assert(type(filehandle) == "userdata")
+assert(filehandle:read('l') == "qualquer coisa")
+io.input(otherfilehandle)
+assert(io.read(string.len"outra coisa") == "outra coisa")
+assert(filehandle:read('l') == "mais qualquer coisa")
+filehandle:close();
+assert(type(filehandle) == "userdata")
+io.input(otherfilehandle)
+assert(io.read(4) == "\0\1\3\0")
+assert(io.read(3) == "\0\0\0")
+assert(io.read(0) == "")        -- 255 is not eof
+assert(io.read(1) == "\255")
+assert(io.read('a') == "\0")
+assert(not io.read(0))
+assert(otherfilehandle == io.input())
+otherfilehandle:close()
+assert(os.remove(file))
+assert(os.remove(otherfile))
+collectgarbage()
+
+io.output(file)
+  :write[[
+ 123.4	-56e-2  not a number
+second line
+third line
+
+and the rest of the file
+]]
+  :close()
+io.input(file)
+local _,a,b,c,d,e,h,__ = io.read(1, 'n', 'n', 'l', 'l', 'l', 'a', 10)
+assert(io.close(io.input()))
+assert(_ == ' ' and __ == nil)
+assert(type(a) == 'number' and a==123.4 and b==-56e-2)
+assert(d=='second line' and e=='third line')
+assert(h==[[
+
+and the rest of the file
+]])
+assert(os.remove(file))
+collectgarbage()
+
+-- testing buffers
+do
+  local f = assert(io.open(file, "w"))
+  local fr = assert(io.open(file, "r"))
+  assert(f:setvbuf("full", 2000))
+  f:write("x")
+  assert(fr:read("all") == "")  -- full buffer; output not written yet
+  f:close()
+  fr:seek("set")
+  assert(fr:read("all") == "x")   -- `close' flushes it
+  f = assert(io.open(file), "w")
+  assert(f:setvbuf("no"))
+  f:write("x")
+  fr:seek("set")
+  assert(fr:read("all") == "x")  -- no buffer; output is ready
+  f:close()
+  f = assert(io.open(file, "a"))
+  assert(f:setvbuf("line"))
+  f:write("x")
+  fr:seek("set", 1)
+  assert(fr:read("all") == "")   -- line buffer; no output without `\n'
+  f:write("a\n"):seek("set", 1)
+  assert(fr:read("all") == "xa\n")  -- now we have a whole line
+  f:close(); fr:close()
+  assert(os.remove(file))
+end
+
+
+if not _soft then
+  print("testing large files (> BUFSIZ)")
+  io.output(file)
+  for i=1,5001 do io.write('0123456789123') end
+  io.write('\n12346'):close()
+  io.input(file)
+  local x = io.read('a')
+  io.input():seek('set', 0)
+  local y = io.read(30001)..io.read(1005)..io.read(0)..
+            io.read(1)..io.read(100003)
+  assert(x == y and string.len(x) == 5001*13 + 6)
+  io.input():seek('set', 0)
+  y = io.read()  -- huge line
+  assert(x == y..'\n'..io.read())
+  assert(io.read() == nil)
+  io.close(io.input())
+  assert(os.remove(file))
+  x = nil; y = nil
+end
+
+if not _port then
+  local progname
+  do  -- get name of running executable
+    local arg = arg or _ARG
+    local i = 0
+    while arg[i] do i = i - 1 end
+    progname = '"' .. arg[i + 1] .. '"'
+  end
+  print("testing popen/pclose and execute")
+  local tests = {
+    -- command,   what,  code
+    {"ls > /dev/null", "ok"},
+    {"not-to-be-found-command", "exit"},
+    {"exit 3", "exit", 3},
+    {"exit 129", "exit", 129},
+    {"kill -s HUP $$", "signal", 1},
+    {"kill -s KILL $$", "signal", 9},
+    {"sh -c 'kill -s HUP $$'", "exit"},
+    {progname .. ' -e " "', "ok"},
+    {progname .. ' -e "os.exit(0, true)"', "ok"},
+    {progname .. ' -e "os.exit(20, true)"', "exit", 20},
+  }
+  print("\n(some error messages are expected now)")
+  for _, v in ipairs(tests) do
+    local x, y, z = io.popen(v[1]):close()
+    local x1, y1, z1 = os.execute(v[1])
+    assert(x == x1 and y == y1 and z == z1)
+    if v[2] == "ok" then
+      assert(x and y == 'exit' and z == 0)
+    else
+      assert(not x and y == v[2])   -- correct status and 'what'
+      -- correct code if known (but always different from 0)
+      assert((v[3] == nil and z > 0) or v[3] == z)
+    end
+  end
+end
+
+
+-- testing tmpfile
+f = io.tmpfile()
+assert(io.type(f) == "file")
+f:write("alo")
+f:seek("set")
+assert(f:read"a" == "alo")
+
+end --}
+
+print'+'
+
+print("testing date/time")
+
+assert(os.date("") == "")
+assert(os.date("!") == "")
+local x = string.rep("a", 10000)
+assert(os.date(x) == x)
+local t = os.time()
+D = os.date("*t", t)
+assert(os.date(string.rep("%d", 1000), t) ==
+       string.rep(os.date("%d", t), 1000))
+assert(os.date(string.rep("%", 200)) == string.rep("%", 100))
+
+local t = os.time()
+D = os.date("*t", t)
+load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
+
+assert(not pcall(os.date, "%9"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%O"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%E"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%Ea"))   -- invalid conversion specifier
+
+if not _port then
+  -- test Posix-specific modifiers
+  assert(type(os.date("%Ex")) == 'string')
+  assert(type(os.date("%Oy")) == 'string')
+
+  -- test out-of-range dates (at least for Unix)
+  -- either time_t cannot represent year 4000 (if time_t is 4 bytes) or
+  -- year cannot represent time_t 2^60 (if time_t is 8 bytes)
+  assert(not os.time{year=4000, month=1, day=1} or not os.date("%Y", 2^60))
+end
+
+-- assume that time has at least 1-second precision
+assert(math.abs(os.difftime(os.time(D), t)) < 1)
+
+assert(not pcall(os.time, {hour = 12}))   -- missing date
+
+D = os.date("!*t", t)
+load(os.date([[!assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
+
+do
+  local D = os.date("*t")
+  local t = os.time(D)
+  assert(type(D.isdst) == 'boolean')
+  D.isdst = nil
+  local t1 = os.time(D)
+  assert(t == t1)   -- if isdst is absent uses correct default
+end
+
+t = os.time(D)
+D.year = D.year-1;
+local t1 = os.time(D)
+-- allow for leap years
+assert(math.abs(os.difftime(t,t1)/(24*3600) - 365) < 2)
+
+-- should not take more than 2 second to execute these two lines
+t = os.time()
+t1 = os.time(os.date("*t"))
+t1 = os.difftime(t1,t)
+assert(0 <= t1 and t1 <= 2)
+
+local t1 = os.time{year=2000, month=10, day=1, hour=23, min=12}
+local t2 = os.time{year=2000, month=10, day=1, hour=23, min=10, sec=19}
+assert(os.difftime(t1,t2) == 60*2-19)
+
+io.output(io.stdout)
+local d = tonumber(os.date('%d'))
+local m = tonumber(os.date('%m'))
+local a = tonumber(os.date('%Y'))
+local ds = tonumber(os.date('%w')) + 1
+local h = tonumber(os.date('%H'))
+local min = tonumber(os.date('%M'))
+local s = tonumber(os.date('%S'))
+io.write(string.format('test done on %2.2d/%2.2d/%d', d, m, a))
+io.write(string.format(', at %2.2d:%2.2d:%2.2d\n', h, min, s))
+io.write(string.format('%s\n', _VERSION))
+
+
diff --git a/lua-5.3.1-tests/gc.lua b/lua-5.3.1-tests/gc.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/gc.lua
@@ -0,0 +1,623 @@
+-- $Id: gc.lua,v 1.70 2015/03/04 13:09:38 roberto Exp $
+
+print('testing garbage collection')
+
+local debug = require"debug"
+
+collectgarbage()
+
+assert(collectgarbage("isrunning"))
+
+local function gcinfo () return collectgarbage"count" * 1024 end
+
+
+-- test weird parameters
+do
+  -- save original parameters
+  local a = collectgarbage("setpause", 200)
+  local b = collectgarbage("setstepmul", 200)
+  local t = {0, 2, 10, 90, 500, 5000, 30000, 0x7ffffffe}
+  for i = 1, #t do
+    local p = t[i]
+    for j = 1, #t do
+      local m = t[j]
+      collectgarbage("setpause", p)
+      collectgarbage("setstepmul", m)
+      collectgarbage("step", 0)
+      collectgarbage("step", 10000)
+    end
+  end
+  -- restore original parameters
+  collectgarbage("setpause", a)
+  collectgarbage("setstepmul", b)
+  collectgarbage()
+end
+
+
+_G["while"] = 234
+
+limit = 5000
+
+
+local function GC1 ()
+  local u
+  local b     -- must be declared after 'u' (to be above it in the stack)
+  local finish = false
+  u = setmetatable({}, {__gc = function () finish = true end})
+  b = {34}
+  repeat u = {} until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false; local i = 1
+  u = setmetatable({}, {__gc = function () finish = true end})
+  repeat i = i + 1; u = tostring(i) .. tostring(i) until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false
+  u = setmetatable({}, {__gc = function () finish = true end})
+  repeat local i; u = function () return i end until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+end
+
+local function GC2 ()
+  local u
+  local finish = false
+  u = {setmetatable({}, {__gc = function () finish = true end})}
+  b = {34}
+  repeat u = {{}} until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false; local i = 1
+  u = {setmetatable({}, {__gc = function () finish = true end})}
+  repeat i = i + 1; u = {tostring(i) .. tostring(i)} until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false
+  u = {setmetatable({}, {__gc = function () finish = true end})}
+  repeat local i; u = {function () return i end} until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+end
+
+local function GC()  GC1(); GC2() end
+
+
+contCreate = 0
+
+print('tables')
+while contCreate <= limit do
+  local a = {}; a = nil
+  contCreate = contCreate+1
+end
+
+a = "a"
+
+contCreate = 0
+print('strings')
+while contCreate <= limit do
+  a = contCreate .. "b";
+  a = string.gsub(a, '(%d%d*)', string.upper)
+  a = "a"
+  contCreate = contCreate+1
+end
+
+
+contCreate = 0
+
+a = {}
+
+print('functions')
+function a:test ()
+  while contCreate <= limit do
+    load(string.format("function temp(a) return 'a%d' end", contCreate), "")()
+    assert(temp() == string.format('a%d', contCreate))
+    contCreate = contCreate+1
+  end
+end
+
+a:test()
+
+-- collection of functions without locals, globals, etc.
+do local f = function () end end
+
+
+print("functions with errors")
+prog = [[
+do
+  a = 10;
+  function foo(x,y)
+    a = sin(a+0.456-0.23e-12);
+    return function (z) return sin(%x+z) end
+  end
+  local x = function (w) a=a+w; end
+end
+]]
+do
+  local step = 1
+  if _soft then step = 13 end
+  for i=1, string.len(prog), step do
+    for j=i, string.len(prog), step do
+      pcall(load(string.sub(prog, i, j), ""))
+    end
+  end
+end
+
+foo = nil
+print('long strings')
+x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
+assert(string.len(x)==80)
+s = ''
+n = 0
+k = math.min(300, (math.maxinteger // 80) // 2)
+while n < k do s = s..x; n=n+1; j=tostring(n)  end
+assert(string.len(s) == k*80)
+s = string.sub(s, 1, 10000)
+s, i = string.gsub(s, '(%d%d%d%d)', '')
+assert(i==10000 // 4)
+s = nil
+x = nil
+
+assert(_G["while"] == 234)
+
+
+print("steps")
+
+print("steps (2)")
+
+local function dosteps (siz)
+  assert(not collectgarbage("isrunning"))
+  collectgarbage()
+  assert(not collectgarbage("isrunning"))
+  local a = {}
+  for i=1,100 do a[i] = {{}}; local b = {} end
+  local x = gcinfo()
+  local i = 0
+  repeat   -- do steps until it completes a collection cycle
+    i = i+1
+  until collectgarbage("step", siz)
+  assert(gcinfo() < x)
+  return i
+end
+
+collectgarbage"stop"
+
+if not _port then
+  -- test the "size" of basic GC steps (whatever they mean...)
+  assert(dosteps(0) > 10)
+  assert(dosteps(10) < dosteps(2))
+end
+
+-- collector should do a full collection with so many steps
+assert(dosteps(20000) == 1)
+assert(collectgarbage("step", 20000) == true)
+assert(collectgarbage("step", 20000) == true)
+
+assert(not collectgarbage("isrunning"))
+collectgarbage"restart"
+assert(collectgarbage("isrunning"))
+
+
+if not _port then
+  -- test the pace of the collector
+  collectgarbage(); collectgarbage()
+  local x = gcinfo()
+  collectgarbage"stop"
+  assert(not collectgarbage("isrunning"))
+  repeat
+    local a = {}
+  until gcinfo() > 3 * x
+  collectgarbage"restart"
+  assert(collectgarbage("isrunning"))
+  repeat
+    local a = {}
+  until gcinfo() <= x * 2
+end
+
+
+print("clearing tables")
+lim = 15
+a = {}
+-- fill a with `collectable' indices
+for i=1,lim do a[{}] = i end
+b = {}
+for k,v in pairs(a) do b[k]=v end
+-- remove all indices and collect them
+for n in pairs(b) do
+  a[n] = nil
+  assert(type(n) == 'table' and next(n) == nil)
+  collectgarbage()
+end
+b = nil
+collectgarbage()
+for n in pairs(a) do error'cannot be here' end
+for i=1,lim do a[i] = i end
+for i=1,lim do assert(a[i] == i) end
+
+
+print('weak tables')
+a = {}; setmetatable(a, {__mode = 'k'});
+-- fill a with some `collectable' indices
+for i=1,lim do a[{}] = i end
+-- and some non-collectable ones
+for i=1,lim do a[i] = i end
+for i=1,lim do local s=string.rep('@', i); a[s] = s..'#' end
+collectgarbage()
+local i = 0
+for k,v in pairs(a) do assert(k==v or k..'#'==v); i=i+1 end
+assert(i == 2*lim)
+
+a = {}; setmetatable(a, {__mode = 'v'});
+a[1] = string.rep('b', 21)
+collectgarbage()
+assert(a[1])   -- strings are *values*
+a[1] = nil
+-- fill a with some `collectable' values (in both parts of the table)
+for i=1,lim do a[i] = {} end
+for i=1,lim do a[i..'x'] = {} end
+-- and some non-collectable ones
+for i=1,lim do local t={}; a[t]=t end
+for i=1,lim do a[i+lim]=i..'x' end
+collectgarbage()
+local i = 0
+for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
+assert(i == 2*lim)
+
+a = {}; setmetatable(a, {__mode = 'vk'});
+local x, y, z = {}, {}, {}
+-- keep only some items
+a[1], a[2], a[3] = x, y, z
+a[string.rep('$', 11)] = string.rep('$', 11)
+-- fill a with some `collectable' values
+for i=4,lim do a[i] = {} end
+for i=1,lim do a[{}] = i end
+for i=1,lim do local t={}; a[t]=t end
+collectgarbage()
+assert(next(a) ~= nil)
+local i = 0
+for k,v in pairs(a) do
+  assert((k == 1 and v == x) or
+         (k == 2 and v == y) or
+         (k == 3 and v == z) or k==v);
+  i = i+1
+end
+assert(i == 4)
+x,y,z=nil
+collectgarbage()
+assert(next(a) == string.rep('$', 11))
+
+
+-- 'bug' in 5.1
+a = {}
+local t = {x = 10}
+local C = setmetatable({key = t}, {__mode = 'v'})
+local C1 = setmetatable({[t] = 1}, {__mode = 'k'})
+a.x = t  -- this should not prevent 't' from being removed from
+         -- weak table 'C' by the time 'a' is finalized
+
+setmetatable(a, {__gc = function (u)
+                          assert(C.key == nil)
+                          assert(type(next(C1)) == 'table')
+                          end})
+
+a, t = nil
+collectgarbage()
+collectgarbage()
+assert(next(C) == nil and next(C1) == nil)
+C, C1 = nil
+
+
+-- ephemerons
+local mt = {__mode = 'k'}
+a = {{10},{20},{30},{40}}; setmetatable(a, mt)
+x = nil
+for i = 1, 100 do local n = {}; a[n] = {k = {x}}; x = n end
+GC()
+local n = x
+local i = 0
+while n do n = a[n].k[1]; i = i + 1 end
+assert(i == 100)
+x = nil
+GC()
+for i = 1, 4 do assert(a[i][1] == i * 10); a[i] = nil end
+assert(next(a) == nil)
+
+local K = {}
+a[K] = {}
+for i=1,10 do a[K][i] = {}; a[a[K][i]] = setmetatable({}, mt) end
+x = nil
+local k = 1
+for j = 1,100 do
+  local n = {}; local nk = k%10 + 1
+  a[a[K][nk]][n] = {x, k = k}; x = n; k = nk
+end
+GC()
+local n = x
+local i = 0
+while n do local t = a[a[K][k]][n]; n = t[1]; k = t.k; i = i + 1 end
+assert(i == 100)
+K = nil
+GC()
+-- assert(next(a) == nil)
+
+
+-- testing errors during GC
+do
+collectgarbage("stop")   -- stop collection
+local u = {}
+local s = {}; setmetatable(s, {__mode = 'k'})
+setmetatable(u, {__gc = function (o)
+  local i = s[o]
+  s[i] = true
+  assert(not s[i - 1])   -- check proper finalization order
+  if i == 8 then error("here") end   -- error during GC
+end})
+
+for i = 6, 10 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
+
+assert(not pcall(collectgarbage))
+for i = 8, 10 do assert(s[i]) end
+
+for i = 1, 5 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
+
+collectgarbage()
+for i = 1, 10 do assert(s[i]) end
+
+getmetatable(u).__gc = false
+
+
+-- __gc errors with non-string messages
+setmetatable({}, {__gc = function () error{} end})
+local a, b = pcall(collectgarbage)
+assert(not a and type(b) == "string" and string.find(b, "error in __gc"))
+
+end
+print '+'
+
+
+-- testing userdata
+if T==nil then
+  (Message or print)('\n >>> testC not active: skipping userdata GC tests <<<\n')
+
+else
+
+  local function newproxy(u)
+    return debug.setmetatable(T.newuserdata(0), debug.getmetatable(u))
+  end
+
+  collectgarbage("stop")   -- stop collection
+  local u = newproxy(nil)
+  debug.setmetatable(u, {__gc = true})
+  local s = 0
+  local a = {[u] = 0}; setmetatable(a, {__mode = 'vk'})
+  for i=1,10 do a[newproxy(u)] = i end
+  for k in pairs(a) do assert(getmetatable(k) == getmetatable(u)) end
+  local a1 = {}; for k,v in pairs(a) do a1[k] = v end
+  for k,v in pairs(a1) do a[v] = k end
+  for i =1,10 do assert(a[i]) end
+  getmetatable(u).a = a1
+  getmetatable(u).u = u
+  do
+    local u = u
+    getmetatable(u).__gc = function (o)
+      assert(a[o] == 10-s)
+      assert(a[10-s] == nil) -- udata already removed from weak table
+      assert(getmetatable(o) == getmetatable(u))
+    assert(getmetatable(o).a[o] == 10-s)
+      s=s+1
+    end
+  end
+  a1, u = nil
+  assert(next(a) ~= nil)
+  collectgarbage()
+  assert(s==11)
+  collectgarbage()
+  assert(next(a) == nil)  -- finalized keys are removed in two cycles
+end
+
+
+-- __gc x weak tables
+local u = setmetatable({}, {__gc = true})
+-- __gc metamethod should be collected before running
+setmetatable(getmetatable(u), {__mode = "v"})
+getmetatable(u).__gc = function (o) os.exit(1) end  -- cannot happen
+u = nil
+collectgarbage()
+
+local u = setmetatable({}, {__gc = true})
+local m = getmetatable(u)
+m.x = {[{0}] = 1; [0] = {1}}; setmetatable(m.x, {__mode = "kv"});
+m.__gc = function (o)
+  assert(next(getmetatable(o).x) == nil)
+  m = 10
+end
+u, m = nil
+collectgarbage()
+assert(m==10)
+
+
+-- errors during collection
+u = setmetatable({}, {__gc = function () error "!!!" end})
+u = nil
+assert(not pcall(collectgarbage))
+
+
+if not _soft then
+  print("deep structures")
+  local a = {}
+  for i = 1,200000 do
+    a = {next = a}
+  end
+  collectgarbage()
+end
+
+-- create many threads with self-references and open upvalues
+print("self-referenced threads")
+local thread_id = 0
+local threads = {}
+
+local function fn (thread)
+    local x = {}
+    threads[thread_id] = function()
+                             thread = x
+                         end
+    coroutine.yield()
+end
+
+while thread_id < 1000 do
+    local thread = coroutine.create(fn)
+    coroutine.resume(thread, thread)
+    thread_id = thread_id + 1
+end
+
+
+-- Create a closure (function inside 'f') with an upvalue ('param') that
+-- points (through a table) to the closure itself and to the thread
+-- ('co' and the initial value of 'param') where closure is running.
+-- Then, assert that table (and therefore everything else) will be
+-- collected.
+do
+  local collected = false   -- to detect collection
+  collectgarbage(); collectgarbage("stop")
+  do
+    local function f (param) 
+      ;(function ()
+        assert(type(f) == 'function' and type(param) == 'thread')
+        param = {param, f}
+        setmetatable(param, {__gc = function () collected = true end})
+        coroutine.yield(100)
+      end)()
+    end
+    local co = coroutine.create(f)
+    assert(coroutine.resume(co, co))
+  end
+  -- Now, thread and closure are not reacheable any more;
+  -- two collections are needed to break cycle
+  collectgarbage()
+  assert(not collected)
+  collectgarbage()
+  assert(collected)
+  collectgarbage("restart")
+end
+
+
+do
+  collectgarbage()
+  collectgarbage"stop"
+  local x = gcinfo()
+  repeat
+    for i=1,1000 do _ENV.a = {} end
+    collectgarbage("step", 0)   -- steps should not unblock the collector
+  until gcinfo() > 2 * x
+  collectgarbage"restart"
+end
+
+
+if T then   -- tests for weird cases collecting upvalues
+
+  local function foo ()
+    local a = {x = 20}
+    coroutine.yield(function () return a.x end)  -- will run collector
+    assert(a.x == 20)   -- 'a' is 'ok'
+    a = {x = 30}   -- create a new object
+    assert(T.gccolor(a) == "white")   -- of course it is new...
+    coroutine.yield(100)   -- 'a' is still local to this thread
+  end
+
+  local t = setmetatable({}, {__mode = "kv"})
+  collectgarbage(); collectgarbage('stop')
+  -- create coroutine in a weak table, so it will never be marked
+  t.co = coroutine.wrap(foo)
+  local f = t.co()   -- create function to access local 'a'
+  T.gcstate("atomic")   -- ensure all objects are traversed
+  assert(T.gcstate() == "atomic")
+  assert(t.co() == 100)   -- resume coroutine, creating new table for 'a'
+  assert(T.gccolor(t.co) == "white")  -- thread was not traversed
+  T.gcstate("pause")   -- collect thread, but should mark 'a' before that
+  assert(t.co == nil and f() == 30)   -- ensure correct access to 'a'
+
+  collectgarbage("restart")
+
+  -- test barrier in sweep phase (advance cleaning of upvalue to white)
+  local u = T.newuserdata(0)   -- create a userdata
+  collectgarbage()
+  collectgarbage"stop"
+  T.gcstate"atomic"
+  local x = {}
+  T.gcstate"sweepallgc"
+  assert(T.gccolor(u) == "black")   -- upvalue is "old" (black)
+  assert(T.gccolor(x) == "white")   -- table is "new" (white)
+  debug.setuservalue(u, x)          -- trigger barrier
+  assert(T.gccolor(u) == "white")   -- upvalue changed to white
+  collectgarbage"restart"
+
+  print"+"
+end
+
+
+if T then
+  local debug = require "debug"
+  collectgarbage("stop")
+  local x = T.newuserdata(0)
+  local y = T.newuserdata(0)
+  debug.setmetatable(y, {__gc = true})   -- bless the new udata before...
+  debug.setmetatable(x, {__gc = true})   -- ...the old one
+  assert(T.gccolor(y) == "white")
+  T.checkmemory()
+  collectgarbage("restart")
+end
+
+
+if T then
+  print("emergency collections")
+  collectgarbage()
+  collectgarbage()
+  T.totalmem(T.totalmem() + 200)
+  for i=1,200 do local a = {} end
+  T.totalmem(0)
+  collectgarbage()
+  local t = T.totalmem("table")
+  local a = {{}, {}, {}}   -- create 4 new tables
+  assert(T.totalmem("table") == t + 4)
+  t = T.totalmem("function")
+  a = function () end   -- create 1 new closure
+  assert(T.totalmem("function") == t + 1)
+  t = T.totalmem("thread")
+  a = coroutine.create(function () end)   -- create 1 new coroutine
+  assert(T.totalmem("thread") == t + 1)
+end
+
+-- create an object to be collected when state is closed
+do
+  local setmetatable,assert,type,print,getmetatable =
+        setmetatable,assert,type,print,getmetatable
+  local tt = {}
+  tt.__gc = function (o)
+    assert(getmetatable(o) == tt)
+    -- create new objects during GC
+    local a = 'xuxu'..(10+3)..'joao', {}
+    ___Glob = o  -- ressurect object!
+    setmetatable({}, tt)  -- creates a new one with same metatable
+    print(">>> closing state " .. "<<<\n")
+  end
+  local u = setmetatable({}, tt)
+  ___Glob = {u}   -- avoid object being collected before program end
+end
+
+-- create several objects to raise errors when collected while closing state
+do
+  local mt = {__gc = function (o) return o + 1 end}
+  for i = 1,10 do
+    -- create object and preserve it until the end
+    table.insert(___Glob, setmetatable({}, mt))
+  end
+end
+
+-- just to make sure
+assert(collectgarbage'isrunning')
+
+print('OK')
diff --git a/lua-5.3.1-tests/goto.lua b/lua-5.3.1-tests/goto.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/goto.lua
@@ -0,0 +1,217 @@
+-- $Id: goto.lua,v 1.11 2014/12/26 17:20:53 roberto Exp $
+
+collectgarbage()
+
+local function errmsg (code, m)
+  local st, msg = load(code)
+  assert(not st and string.find(msg, m))
+end
+
+-- cannot see label inside block
+errmsg([[ goto l1; do ::l1:: end ]], "label 'l1'")
+errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
+
+-- repeated label
+errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
+
+
+-- undefined label
+errmsg([[ goto l1; local aa ::l1:: ::l2:: print(3) ]], "local 'aa'")
+
+-- jumping over variable definition
+errmsg([[
+do local bb, cc; goto l1; end
+local aa
+::l1:: print(3)
+]], "local 'aa'")
+
+-- jumping into a block
+errmsg([[ do ::l1:: end goto l1 ]], "label 'l1'")
+errmsg([[ goto l1 do ::l1:: end ]], "label 'l1'")
+
+-- cannot continue a repeat-until with variables
+errmsg([[
+  repeat
+    if x then goto cont end
+    local xuxu = 10
+    ::cont::
+  until xuxu < x
+]], "local 'xuxu'")
+
+-- simple gotos
+local x
+do
+  local y = 12
+  goto l1
+  ::l2:: x = x + 1; goto l3
+  ::l1:: x = y; goto l2
+end
+::l3:: ::l3_1:: assert(x == 13)
+
+
+-- long labels
+do
+  local prog = [[
+  do
+    local a = 1
+    goto l%sa; a = a + 1
+   ::l%sa:: a = a + 10
+    goto l%sb; a = a + 2
+   ::l%sb:: a = a + 20
+    return a
+  end
+  ]]
+  local label = string.rep("0123456789", 40)
+  prog = string.format(prog, label, label, label, label)
+  assert(assert(load(prog))() == 31)
+end
+
+-- goto to correct label when nested
+do goto l3; ::l3:: end   -- does not loop jumping to previous label 'l3'
+
+-- ok to jump over local dec. to end of block
+do
+  goto l1
+  local a = 23
+  x = a
+  ::l1::;
+end
+
+while true do
+  goto l4
+  goto l1  -- ok to jump over local dec. to end of block
+  goto l1  -- multiple uses of same label
+  local x = 45
+  ::l1:: ;;;
+end
+::l4:: assert(x == 13)
+
+if print then
+  goto l1   -- ok to jump over local dec. to end of block
+  error("should not be here")
+  goto l2   -- ok to jump over local dec. to end of block
+  local x
+  ::l1:: ; ::l2:: ;;
+else end
+
+-- to repeat a label in a different function is OK
+local function foo ()
+  local a = {}
+  goto l3
+  ::l1:: a[#a + 1] = 1; goto l2;
+  ::l2:: a[#a + 1] = 2; goto l5;
+  ::l3::
+  ::l3a:: a[#a + 1] = 3; goto l1;
+  ::l4:: a[#a + 1] = 4; goto l6;
+  ::l5:: a[#a + 1] = 5; goto l4;
+  ::l6:: assert(a[1] == 3 and a[2] == 1 and a[3] == 2 and
+              a[4] == 5 and a[5] == 4)
+  if not a[6] then a[6] = true; goto l3a end   -- do it twice
+end
+
+::l6:: foo()
+
+
+
+--------------------------------------------------------------------------------
+-- testing closing of upvalues
+
+local debug = require 'debug'
+
+local function foo ()
+  local t = {}
+  do
+  local i = 1
+  local a, b, c, d
+  t[1] = function () return a, b, c, d end
+  ::l1::
+  local b
+  do
+    local c
+    t[#t + 1] = function () return a, b, c, d end    -- t[2], t[4], t[6]
+    if i > 2 then goto l2 end
+    do
+      local d
+      t[#t + 1] = function () return a, b, c, d end   -- t[3], t[5]
+      i = i + 1
+      local a
+      goto l1
+    end
+  end
+  end
+  ::l2:: return t
+end
+
+local a = foo()
+assert(#a == 6)
+
+-- all functions share same 'a'
+for i = 2, 6 do
+  assert(debug.upvalueid(a[1], 1) == debug.upvalueid(a[i], 1))
+end
+
+-- 'b' and 'c' are shared among some of them
+for i = 2, 6 do
+  -- only a[1] uses external 'b'/'b'
+  assert(debug.upvalueid(a[1], 2) ~= debug.upvalueid(a[i], 2))
+  assert(debug.upvalueid(a[1], 3) ~= debug.upvalueid(a[i], 3))
+end
+
+for i = 3, 5, 2 do
+  -- inner functions share 'b'/'c' with previous ones
+  assert(debug.upvalueid(a[i], 2) == debug.upvalueid(a[i - 1], 2))
+  assert(debug.upvalueid(a[i], 3) == debug.upvalueid(a[i - 1], 3))
+  -- but not with next ones
+  assert(debug.upvalueid(a[i], 2) ~= debug.upvalueid(a[i + 1], 2))
+  assert(debug.upvalueid(a[i], 3) ~= debug.upvalueid(a[i + 1], 3))
+end
+
+-- only external 'd' is shared
+for i = 2, 6, 2 do
+  assert(debug.upvalueid(a[1], 4) == debug.upvalueid(a[i], 4))
+end
+
+-- internal 'd's are all different
+for i = 3, 5, 2 do
+  for j = 1, 6 do
+    assert((debug.upvalueid(a[i], 4) == debug.upvalueid(a[j], 4))
+      == (i == j))
+  end
+end
+
+--------------------------------------------------------------------------------
+-- testing if x goto optimizations
+
+local function testG (a)
+  if a == 1 then
+    goto l1
+    error("should never be here!")
+  elseif a == 2 then goto l2
+  elseif a == 3 then goto l3
+  elseif a == 4 then
+    goto l1  -- go to inside the block
+    error("should never be here!")
+    ::l1:: a = a + 1   -- must go to 'if' end
+  else
+    goto l4
+    ::l4a:: a = a * 2; goto l4b
+    error("should never be here!")
+    ::l4:: goto l4a
+    error("should never be here!")
+    ::l4b::
+  end
+  do return a end
+  ::l2:: do return "2" end
+  ::l3:: do return "3" end
+  ::l1:: return "1"
+end
+
+assert(testG(1) == "1")
+assert(testG(2) == "2")
+assert(testG(3) == "3")
+assert(testG(4) == 5)
+assert(testG(5) == 10)
+--------------------------------------------------------------------------------
+
+
+print'OK'
diff --git a/lua-5.3.1-tests/literals.lua b/lua-5.3.1-tests/literals.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/literals.lua
@@ -0,0 +1,291 @@
+-- $Id: literals.lua,v 1.34 2015/03/04 13:09:38 roberto Exp $
+
+print('testing scanner')
+
+local debug = require "debug"
+
+
+local function dostring (x) return assert(load(x), "")() end
+
+dostring("x \v\f = \t\r 'a\0a' \v\f\f")
+assert(x == 'a\0a' and string.len(x) == 3)
+
+-- escape sequences
+assert('\n\"\'\\' == [[
+
+"'\]])
+
+assert(string.find("\a\b\f\n\r\t\v", "^%c%c%c%c%c%c%c$"))
+
+-- assume ASCII just for tests:
+assert("\09912" == 'c12')
+assert("\99ab" == 'cab')
+assert("\099" == '\99')
+assert("\099\n" == 'c\10')
+assert('\0\0\0alo' == '\0' .. '\0\0' .. 'alo')
+
+assert(010 .. 020 .. -030 == "1020-30")
+
+-- hexadecimal escapes
+assert("\x00\x05\x10\x1f\x3C\xfF\xe8" == "\0\5\16\31\60\255\232")
+
+local function lexstring (x, y, n)
+  local f = assert(load('return ' .. x ..
+            ', require"debug".getinfo(1).currentline', ''))
+  local s, l = f()
+  assert(s == y and l == n)
+end
+
+lexstring("'abc\\z  \n   efg'", "abcefg", 2)
+lexstring("'abc\\z  \n\n\n'", "abc", 4)
+lexstring("'\\z  \n\t\f\v\n'",  "", 3)
+lexstring("[[\nalo\nalo\n\n]]", "alo\nalo\n\n", 5)
+lexstring("[[\nalo\ralo\n\n]]", "alo\nalo\n\n", 5)
+lexstring("[[\nalo\ralo\r\n]]", "alo\nalo\n", 4)
+lexstring("[[\ralo\n\ralo\r\n]]", "alo\nalo\n", 4)
+lexstring("[[alo]\n]alo]]", "alo]\n]alo", 2)
+
+assert("abc\z
+        def\z
+        ghi\z
+       " == 'abcdefghi')
+
+
+-- UTF-8 sequences
+assert("\u{0}\u{00000000}\x00\0" == string.char(0, 0, 0, 0))
+
+-- limits for 1-byte sequences
+assert("\u{0}\u{7F}" == "\x00\z\x7F")
+
+-- limits for 2-byte sequences
+assert("\u{80}\u{7FF}" == "\xC2\x80\z\xDF\xBF")
+
+-- limits for 3-byte sequences
+assert("\u{800}\u{FFFF}" ==   "\xE0\xA0\x80\z\xEF\xBF\xBF")
+
+-- limits for 4-byte sequences
+assert("\u{10000}\u{10FFFF}" == "\xF0\x90\x80\x80\z\xF4\x8F\xBF\xBF")
+
+
+-- Error in escape sequences
+local function lexerror (s, err)
+  local st, msg = load('return ' .. s, '')
+  if err ~= '<eof>' then err = err .. "'" end
+  assert(not st and string.find(msg, "near .-" .. err))
+end
+
+lexerror([["abc\x"]], [[\x"]])
+lexerror([["abc\x]], [[\x]])
+lexerror([["\x]], [[\x]])
+lexerror([["\x5"]], [[\x5"]])
+lexerror([["\x5]], [[\x5]])
+lexerror([["\xr"]], [[\xr]])
+lexerror([["\xr]], [[\xr]])
+lexerror([["\x.]], [[\x.]])
+lexerror([["\x8%"]], [[\x8%%]])
+lexerror([["\xAG]], [[\xAG]])
+lexerror([["\g"]], [[\g]])
+lexerror([["\g]], [[\g]])
+lexerror([["\."]], [[\%.]])
+
+lexerror([["\999"]], [[\999"]])
+lexerror([["xyz\300"]], [[\300"]])
+lexerror([["   \256"]], [[\256"]])
+
+-- errors in UTF-8 sequences
+lexerror([["abc\u{110000}"]], [[abc\u{110000]])   -- too large
+lexerror([["abc\u11r"]], [[abc\u1]])    -- missing '{'
+lexerror([["abc\u"]], [[abc\u"]])    -- missing '{'
+lexerror([["abc\u{11r"]], [[abc\u{11r]])    -- missing '}'
+lexerror([["abc\u{11"]], [[abc\u{11"]])    -- missing '}'
+lexerror([["abc\u{11]], [[abc\u{11]])    -- missing '}'
+lexerror([["abc\u{r"]], [[abc\u{r]])     -- no digits
+
+-- unfinished strings
+lexerror("[=[alo]]", "<eof>")
+lexerror("[=[alo]=", "<eof>")
+lexerror("[=[alo]", "<eof>")
+lexerror("'alo", "<eof>")
+lexerror("'alo \\z  \n\n", "<eof>")
+lexerror("'alo \\z", "<eof>")
+lexerror([['alo \98]], "<eof>")
+
+-- valid characters in variable names
+for i = 0, 255 do
+  local s = string.char(i)
+  assert(not string.find(s, "[a-zA-Z_]") == not load(s .. "=1", ""))
+  assert(not string.find(s, "[a-zA-Z_0-9]") ==
+         not load("a" .. s .. "1 = 1", ""))
+end
+
+
+-- long variable names
+
+var1 = string.rep('a', 15000) .. '1'
+var2 = string.rep('a', 15000) .. '2'
+prog = string.format([[
+  %s = 5
+  %s = %s + 1
+  return function () return %s - %s end
+]], var1, var2, var1, var1, var2)
+local f = dostring(prog)
+assert(_G[var1] == 5 and _G[var2] == 6 and f() == -1)
+var1, var2, f = nil
+print('+')
+
+-- escapes --
+assert("\n\t" == [[
+
+	]])
+assert([[
+
+ $debug]] == "\n $debug")
+assert([[ [ ]] ~= [[ ] ]])
+-- long strings --
+b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
+assert(string.len(b) == 960)
+prog = [=[
+print('+')
+
+a1 = [["this is a 'string' with several 'quotes'"]]
+a2 = "'quotes'"
+
+assert(string.find(a1, a2) == 34)
+print('+')
+
+a1 = [==[temp = [[an arbitrary value]]; ]==]
+assert(load(a1))()
+assert(temp == 'an arbitrary value')
+-- long strings --
+b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
+assert(string.len(b) == 960)
+print('+')
+
+a = [[00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+]]
+assert(string.len(a) == 1863)
+assert(string.sub(a, 1, 40) == string.sub(b, 1, 40))
+x = 1
+]=]
+
+print('+')
+x = nil
+dostring(prog)
+assert(x)
+
+prog = nil
+a = nil
+b = nil
+
+
+-- testing line ends
+prog = [[
+a = 1        -- a comment
+b = 2
+
+
+x = [=[
+hi
+]=]
+y = "\
+hello\r\n\
+"
+return require"debug".getinfo(1).currentline
+]]
+
+for _, n in pairs{"\n", "\r", "\n\r", "\r\n"} do
+  local prog, nn = string.gsub(prog, "\n", n)
+  assert(dostring(prog) == nn)
+  assert(_G.x == "hi\n" and _G.y == "\nhello\r\n\n")
+end
+
+
+-- testing comments and strings with long brackets
+a = [==[]=]==]
+assert(a == "]=")
+
+a = [==[[===[[=[]]=][====[]]===]===]==]
+assert(a == "[===[[=[]]=][====[]]===]===")
+
+a = [====[[===[[=[]]=][====[]]===]===]====]
+assert(a == "[===[[=[]]=][====[]]===]===")
+
+a = [=[]]]]]]]]]=]
+assert(a == "]]]]]]]]")
+
+
+--[===[
+x y z [==[ blu foo
+]==
+]
+]=]==]
+error error]=]===]
+
+-- generate all strings of four of these chars
+local x = {"=", "[", "]", "\n"}
+local len = 4
+local function gen (c, n)
+  if n==0 then coroutine.yield(c)
+  else
+    for _, a in pairs(x) do
+      gen(c..a, n-1)
+    end
+  end
+end
+
+for s in coroutine.wrap(function () gen("", len) end) do
+  assert(s == load("return [====[\n"..s.."]====]", "")())
+end
+
+
+-- testing decimal point locale
+if os.setlocale("pt_BR") or os.setlocale("ptb") then
+  assert(not load("a = (3,4)"))
+  assert(tonumber("3,4") == 3.4 and tonumber"3.4" == nil)
+  assert(assert(load("return 3.4"))() == 3.4)
+  assert(assert(load("return .4,3"))() == .4)
+  assert(assert(load("return 4."))() == 4.)
+  assert(assert(load("return 4.+.5"))() == 4.5)
+  local a,b = load("return 4.5.")
+  assert(string.find(b, "'4%.5%.'"))
+  assert(os.setlocale("C"))
+else
+  (Message or print)(
+   '\n >>> pt_BR locale not available: skipping decimal point tests <<<\n')
+end
+
+
+-- testing %q x line ends
+local s = "a string with \r and \n and \r\n and \n\r"
+local c = string.format("return %q", s)
+assert(assert(load(c))() == s)
+
+-- testing errors
+assert(not load"a = 'non-ending string")
+assert(not load"a = 'non-ending string\n'")
+assert(not load"a = '\\345'")
+assert(not load"a = [=x]")
+
+print('OK')
diff --git a/lua-5.3.1-tests/locals.lua b/lua-5.3.1-tests/locals.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/locals.lua
@@ -0,0 +1,161 @@
+-- $Id: locals.lua,v 1.36 2015/03/04 13:09:38 roberto Exp $
+
+print('testing local variables and environments')
+
+local debug = require"debug"
+
+
+-- bug in 5.1:
+
+local function f(x) x = nil; return x end
+assert(f(10) == nil)
+
+local function f() local x; return x end
+assert(f(10) == nil)
+
+local function f(x) x = nil; local y; return x, y end
+assert(f(10) == nil and select(2, f(20)) == nil)
+
+do
+  local i = 10
+  do local i = 100; assert(i==100) end
+  do local i = 1000; assert(i==1000) end
+  assert(i == 10)
+  if i ~= 10 then
+    local i = 20
+  else
+    local i = 30
+    assert(i == 30)
+  end
+end
+
+
+
+f = nil
+
+local f
+x = 1
+
+a = nil
+load('local a = {}')()
+assert(a == nil)
+
+function f (a)
+  local _1, _2, _3, _4, _5
+  local _6, _7, _8, _9, _10
+  local x = 3
+  local b = a
+  local c,d = a,b
+  if (d == b) then
+    local x = 'q'
+    x = b
+    assert(x == 2)
+  else
+    assert(nil)
+  end
+  assert(x == 3)
+  local f = 10
+end
+
+local b=10
+local a; repeat local b; a,b=1,2; assert(a+1==b); until a+b==3
+
+
+assert(x == 1)
+
+f(2)
+assert(type(f) == 'function')
+
+
+local function getenv (f)
+  local a,b = debug.getupvalue(f, 1)
+  assert(a == '_ENV')
+  return b
+end
+
+-- test for global table of loaded chunks
+assert(getenv(load"a=3") == _G)
+local c = {}; local f = load("a = 3", nil, nil, c)
+assert(getenv(f) == c)
+assert(c.a == nil)
+f()
+assert(c.a == 3)
+
+-- old test for limits for special instructions (now just a generic test)
+do
+  local i = 2
+  local p = 4    -- p == 2^i
+  repeat
+    for j=-3,3 do
+      assert(load(string.format([[local a=%s;
+                                        a=a+%s;
+                                        assert(a ==2^%s)]], j, p-j, i), '')) ()
+      assert(load(string.format([[local a=%s;
+                                        a=a-%s;
+                                        assert(a==-2^%s)]], -j, p-j, i), '')) ()
+      assert(load(string.format([[local a,b=0,%s;
+                                        a=b-%s;
+                                        assert(a==-2^%s)]], -j, p-j, i), '')) ()
+    end
+    p = 2 * p;  i = i + 1
+  until p <= 0
+end
+
+print'+'
+
+
+if rawget(_G, "querytab") then
+  -- testing clearing of dead elements from tables
+  collectgarbage("stop")   -- stop GC
+  local a = {[{}] = 4, [3] = 0, alo = 1, 
+             a1234567890123456789012345678901234567890 = 10}
+
+  local t = querytab(a)
+
+  for k,_ in pairs(a) do a[k] = nil end
+  collectgarbage()   -- restore GC and collect dead fiels in `a'
+  for i=0,t-1 do
+    local k = querytab(a, i)
+    assert(k == nil or type(k) == 'number' or k == 'alo')
+  end
+end
+
+
+-- testing lexical environments
+
+assert(_ENV == _G)
+
+do
+local dummy
+local _ENV = (function (...) return ... end)(_G, dummy)   -- {
+
+do local _ENV = {assert=assert}; assert(true) end
+mt = {_G = _G}
+local foo,x
+A = false    -- "declare" A
+do local _ENV = mt
+  function foo (x)
+    A = x
+    do local _ENV =  _G; A = 1000 end
+    return function (x) return A .. x end
+  end
+end
+assert(getenv(foo) == mt)
+x = foo('hi'); assert(mt.A == 'hi' and A == 1000)
+assert(x('*') == mt.A .. '*')
+
+do local _ENV = {assert=assert, A=10};
+  do local _ENV = {assert=assert, A=20};
+    assert(A==20);x=A
+  end
+  assert(A==10 and x==20)
+end
+assert(x==20)
+
+
+print('OK')
+
+return 5,f
+
+end   -- }
+
diff --git a/lua-5.3.1-tests/main.lua b/lua-5.3.1-tests/main.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/main.lua
@@ -0,0 +1,380 @@
+# testing special comment on first line
+-- $Id: main.lua,v 1.62 2015/05/15 12:28:08 roberto Exp $
+
+-- most (all?) tests here assume a reasonable "Unix-like" shell
+if _port then return end
+
+-- use only "double quotes" inside shell scripts (better change to
+-- run on Windows)
+
+
+print ("testing stand-alone interpreter")
+
+assert(os.execute())   -- machine has a system command
+
+local arg = arg or _ARG
+
+local prog = os.tmpname()
+local otherprog = os.tmpname()
+local out = os.tmpname()
+
+local progname
+do
+  local i = 0
+  while arg[i] do i=i-1 end
+  progname = arg[i+1]
+end
+print("progname: "..progname)
+
+local prepfile = function (s, p)
+  p = p or prog
+  io.output(p)
+  io.write(s)
+  assert(io.close())
+end
+
+local function getoutput ()
+  io.input(out)
+  local t = io.read("a")
+  io.input():close()
+  assert(os.remove(out))
+  return t
+end
+
+local function checkprogout (s)
+  local t = getoutput()
+  for line in string.gmatch(s, ".-\n") do
+    assert(string.find(t, line, 1, true))
+  end
+end
+
+local function checkout (s)
+  local t = getoutput()
+  if s ~= t then print(string.format("'%s' - '%s'\n", s, t)) end
+  assert(s == t)
+  return t
+end
+
+
+local function RUN (p, ...)
+  p = string.gsub(p, "lua", '"'..progname..'"', 1)
+  local s = string.format(p, ...)
+  assert(os.execute(s))
+end
+
+local function NoRun (msg, p, ...)
+  p = string.gsub(p, "lua", '"'..progname..'"', 1)
+  local s = string.format(p, ...)
+  s = string.format("%s 2> %s", s, out)  -- will send error to 'out'
+  assert(not os.execute(s))
+  assert(string.find(getoutput(), msg, 1, true))  -- check error message
+end
+
+RUN('lua -v')
+
+print(string.format("(temporary program file used in these tests: %s)", prog))
+
+-- running stdin as a file
+prepfile""
+RUN('lua - < %s > %s', prog, out)
+checkout("")
+
+prepfile[[
+  print(
+1, a
+)
+]]
+RUN('lua - < %s > %s', prog, out)
+checkout("1\tnil\n")
+
+RUN('echo "print(10)\nprint(2)\n" | lua > %s', out)
+checkout("10\n2\n")
+
+
+-- test option '-'
+RUN('echo "print(arg[1])" | lua - -h > %s', out)
+checkout("-h\n")
+
+-- test environment variables used by Lua
+
+prepfile("print(package.path)")
+
+-- test LUA_PATH
+RUN('env LUA_INIT= LUA_PATH=x lua %s > %s', prog, out)
+checkout("x\n")
+
+-- test LUA_PATH_version
+RUN('env LUA_INIT= LUA_PATH_5_3=y LUA_PATH=x lua %s > %s', prog, out)
+checkout("y\n")
+
+-- test LUA_CPATH
+prepfile("print(package.cpath)")
+RUN('env LUA_INIT= LUA_CPATH=xuxu lua %s > %s', prog, out)
+checkout("xuxu\n")
+
+-- test LUA_CPATH_version
+RUN('env LUA_INIT= LUA_CPATH_5_3=yacc LUA_CPATH=x lua %s > %s', prog, out)
+checkout("yacc\n")
+
+-- test LUA_INIT (and its access to 'arg' table)
+prepfile("print(X)")
+RUN('env LUA_INIT="X=tonumber(arg[1])" lua %s 3.2 > %s', prog, out)
+checkout("3.2\n")
+
+-- test LUA_INIT_version
+prepfile("print(X)")
+RUN('env LUA_INIT_5_3="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
+checkout("10\n")
+
+-- test LUA_INIT for files
+prepfile("x = x or 10; print(x); x = x + 1")
+RUN('env LUA_INIT="@%s" lua %s > %s', prog, prog, out)
+checkout("10\n11\n")
+
+-- test errors in LUA_INIT
+NoRun('LUA_INIT:1: 10', 'env LUA_INIT="error(10)" lua')
+
+-- test option '-E'
+local defaultpath, defaultCpath
+
+do
+  prepfile("print(package.path, package.cpath)")
+  RUN('env LUA_INIT="error(10)" LUA_PATH=xxx LUA_CPATH=xxx lua -E %s > %s',
+       prog, out)
+  local out = getoutput()
+  defaultpath = string.match(out, "^(.-)\t")
+  defaultCpath = string.match(out, "\t(.-)$")
+end
+
+-- paths did not changed
+assert(not string.find(defaultpath, "xxx") and
+       string.find(defaultpath, "lua") and
+       not string.find(defaultCpath, "xxx") and
+       string.find(defaultCpath, "lua"))
+
+
+-- test replacement of ';;' to default path
+local function convert (p)
+  prepfile("print(package.path)")
+  RUN('env LUA_PATH="%s" lua %s > %s', p, prog, out)
+  local expected = getoutput()
+  expected = string.sub(expected, 1, -2)   -- cut final end of line
+  assert(string.gsub(p, ";;", ";"..defaultpath..";") == expected)
+end
+
+convert(";")
+convert(";;")
+convert(";;;")
+convert(";;;;")
+convert(";;;;;")
+convert(";;a;;;bc")
+
+
+-- test -l over multiple libraries
+prepfile("print(1); a=2; return {x=15}")
+prepfile(("print(a); print(_G['%s'].x)"):format(prog), otherprog)
+RUN('env LUA_PATH="?;;" lua -l %s -l%s -lstring -l io %s > %s', prog, otherprog, otherprog, out)
+checkout("1\n2\n15\n2\n15\n")
+
+-- test 'arg' table
+local a = [[
+  assert(#arg == 3 and arg[1] == 'a' and
+         arg[2] == 'b' and arg[3] == 'c')
+  assert(arg[-1] == '--' and arg[-2] == "-e " and arg[-3] == '%s')
+  assert(arg[4] == nil and arg[-4] == nil)
+  local a, b, c = ...
+  assert(... == 'a' and a == 'a' and b == 'b' and c == 'c')
+]]
+a = string.format(a, progname)
+prepfile(a)
+RUN('lua "-e " -- %s a b c', prog)   -- "-e " runs an empty command
+
+-- test 'arg' availability in libraries
+prepfile"assert(arg)"
+prepfile("assert(arg)", otherprog)
+RUN('env LUA_PATH="?;;" lua -l%s - < %s', prog, otherprog)
+
+-- test messing up the 'arg' table
+RUN('echo "print(...)" | lua -e "arg[1] = 100" - > %s', out)
+checkout("100\n")
+NoRun("'arg' is not a table", 'echo "" | lua -e "arg = 1" -')
+
+-- test error in 'print'
+RUN('echo 10 | lua -e "print=nil" -i > /dev/null 2> %s', out)
+assert(string.find(getoutput(), "error calling 'print'"))
+
+-- test 'debug.debug'
+RUN('echo "io.stderr:write(1000)\ncont" | lua -e "require\'debug\'.debug()" 2> %s', out)
+checkout("lua_debug> 1000lua_debug> ")
+
+-- test many arguments
+prepfile[[print(({...})[30])]]
+RUN('lua %s %s > %s', prog, string.rep(" a", 30), out)
+checkout("a\n")
+
+RUN([[lua "-eprint(1)" -ea=3 -e "print(a)" > %s]], out)
+checkout("1\n3\n")
+
+-- test iteractive mode
+prepfile[[
+(6*2-6) -- ===
+a =
+10
+print(a)
+a]]
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("6\n10\n10\n\n")
+
+prepfile("a = [[b\nc\nd\ne]]\n=a")
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("b\nc\nd\ne\n\n")
+
+prompt = "alo"
+prepfile[[ --
+a = 2
+]]
+RUN([[lua "-e_PROMPT='%s'" -i < %s > %s]], prompt, prog, out)
+local t = getoutput()
+assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
+
+-- test for error objects
+prepfile[[
+debug = require "debug"
+m = {x=0}
+setmetatable(m, {__tostring = function(x)
+  return tostring(debug.getinfo(4).currentline + x.x)
+end})
+error(m)
+]]
+NoRun(progname .. ": 6\n", [[lua %s]], prog)
+
+prepfile("error{}")
+NoRun("error object is a table value", [[lua %s]], prog)
+
+
+-- chunk broken in many lines
+s = [=[ -- 
+function f ( x ) 
+  local a = [[
+xuxu
+]]
+  local b = "\
+xuxu\n"
+  if x == 11 then return 1 + 12 , 2 + 20 end  --[[ test multiple returns ]]
+  return x + 1 
+  --\\
+end
+return( f( 100 ) )
+assert( a == b )
+do return f( 11 ) end  ]=]
+s = string.gsub(s, ' ', '\n\n')   -- change all spaces for newlines
+prepfile(s)
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("101\n13\t22\n\n")
+  
+prepfile[[#comment in 1st line without \n at the end]]
+RUN('lua %s', prog)
+  
+prepfile[[#test line number when file starts with comment line
+debug = require"debug"
+print(debug.getinfo(1).currentline)
+]]
+RUN('lua %s > %s', prog, out)
+checkprogout('3')
+
+-- close Lua with an open file
+prepfile(string.format([[io.output(%q); io.write('alo')]], out))
+RUN('lua %s', prog)
+checkout('alo')
+
+-- bug in 5.2 beta (extra \0 after version line)
+RUN([[lua -v  -e"print'hello'" > %s]], out)
+t = getoutput()
+assert(string.find(t, "PUC%-Rio\nhello"))
+
+
+-- testing os.exit
+prepfile("os.exit(nil, true)")
+RUN('lua %s', prog)
+prepfile("os.exit(0, true)")
+RUN('lua %s', prog)
+prepfile("os.exit(true, true)")
+RUN('lua %s', prog)
+prepfile("os.exit(1, true)")
+NoRun("", "lua %s", prog)   -- no message
+prepfile("os.exit(false, true)")
+NoRun("", "lua %s", prog)   -- no message
+
+-- remove temporary files
+assert(os.remove(prog))
+assert(os.remove(otherprog))
+assert(not os.remove(out))
+
+-- invalid options
+NoRun("unrecognized option '-h'", "lua -h")
+NoRun("unrecognized option '---'", "lua ---")
+NoRun("unrecognized option '-Ex'", "lua -Ex")
+NoRun("unrecognized option '-vv'", "lua -vv")
+NoRun("unrecognized option '-iv'", "lua -iv")
+NoRun("'-e' needs argument", "lua -e")
+NoRun("syntax error", "lua -e a")
+NoRun("'-l' needs argument", "lua -l")
+
+
+if T then   -- auxiliary library?
+  print("testing 'not enough memory' to create a state")
+  NoRun("not enough memory", "env MEMLIMIT=100 lua")
+end
+print('+')
+
+print('testing Ctrl C')
+do
+  -- interrupt a script
+  local function kill (pid)
+    return os.execute(string.format('kill -INT %d 2> /dev/null', pid))
+  end
+
+  -- function to run a script in background, returning its output file
+  -- descriptor and its pid
+  local function runback (luaprg)
+    -- shell script to run 'luaprg' in background and echo its pid
+    local shellprg = string.format('%s -e "%s" & echo $!', progname, luaprg)
+    local f = io.popen(shellprg, "r")   -- run shell script
+    local pid = f:read()   -- get pid for Lua script
+    print("(if test fails now, it may leave a Lua script running in \z
+            background, pid " .. pid .. ")")
+    return f, pid
+  end
+
+  -- Lua script that runs protected infinite loop and then prints '42'
+  local f, pid = runback[[
+    pcall(function () print(12); while true do end end); print(42)]]
+  -- wait until script is inside 'pcall'
+  assert(f:read() == "12")
+  kill(pid)  -- send INT signal to Lua script
+  -- check that 'pcall' captured the exception and script continued running
+  assert(f:read() == "42")  -- expected output
+  assert(f:close())
+  print("done")
+
+  -- Lua script in a looooog unbreakable search
+  local f, pid = runback[[
+    print(15); string.find(string.rep('a', 1000), '.*.*.*.*.*b')]]
+  -- wait (so script can reach the loop)
+  assert(f:read() == "15")
+  assert(os.execute("sleep 1"))
+  -- must send at least two INT signals to stop this Lua script
+  local n = 100
+  for i = 0, 100 do   -- keep sending signals
+    if not kill(pid) then   -- until it fails
+      n = i   -- number of non-failed kills
+      break
+    end
+  end
+  assert(f:close())
+  assert(n >= 2)
+  print(string.format("done (with %d kills)", n))
+
+end
+
+print("OK")
diff --git a/lua-5.3.1-tests/math.lua b/lua-5.3.1-tests/math.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/math.lua
@@ -0,0 +1,781 @@
+-- $Id: math.lua,v 1.72 2015/06/09 15:55:13 roberto Exp $
+
+print("testing numbers and math lib")
+
+local minint = math.mininteger
+local maxint = math.maxinteger
+
+local intbits = math.floor(math.log(maxint, 2) + 0.5) + 1
+assert((1 << intbits) == 0)
+
+assert(minint == 1 << (intbits - 1))
+assert(maxint == minint - 1)
+
+-- number of bits in the mantissa of a floating-point number
+local floatbits = 24
+do
+  local p = 2.0^floatbits
+  while p < p + 1.0 do
+    p = p * 2.0
+    floatbits = floatbits + 1
+  end
+end
+
+
+do
+  local x = 2.0^floatbits
+  assert(x > x - 1.0 and x == x + 1.0)
+
+  print(string.format("%d-bit integers, %d-bit (mantissa) floats",
+                       intbits, floatbits))
+end
+
+assert(math.type(0) == "integer" and math.type(0.0) == "float"
+       and math.type("10") == nil)
+
+
+local function checkerror (msg, f, ...)
+  local s, err = pcall(f, ...)
+  assert(not s and string.find(err, msg))
+end
+
+local msgf2i = "number.* has no integer representation"
+
+-- float equality
+function eq (a,b,limit)
+  if not limit then
+    if floatbits >= 50 then limit = 1E-11
+    else limit = 1E-5
+    end
+  end
+  -- a == b needed for +inf/-inf
+  return a == b or math.abs(a-b) <= limit
+end
+
+
+-- equality with types
+function eqT (a,b)
+  return a == b and math.type(a) == math.type(b)
+end
+
+
+-- basic float notation
+assert(0e12 == 0 and .0 == 0 and 0. == 0 and .2e2 == 20 and 2.E-1 == 0.2)
+
+do
+  local a,b,c = "2", " 3e0 ", " 10  "
+  assert(a+b == 5 and -b == -3 and b+"2" == 5 and "10"-c == 0)
+  assert(type(a) == 'string' and type(b) == 'string' and type(c) == 'string')
+  assert(a == "2" and b == " 3e0 " and c == " 10  " and -c == -"  10 ")
+  assert(c%a == 0 and a^b == 08)
+  a = 0
+  assert(a == -a and 0 == -0)
+end
+
+do
+  local x = -1
+  local mz = 0/x   -- minus zero
+  t = {[0] = 10, 20, 30, 40, 50}
+  assert(t[mz] == t[0] and t[-0] == t[0])
+end
+
+do   -- tests for 'modf'
+  local a,b = math.modf(3.5)
+  assert(a == 3.0 and b == 0.5)
+  a,b = math.modf(-2.5)
+  assert(a == -2.0 and b == -0.5)
+  a,b = math.modf(-3e23)
+  assert(a == -3e23 and b == 0.0)
+  a,b = math.modf(3e35)
+  assert(a == 3e35 and b == 0.0)
+  a,b = math.modf(-1/0)   -- -inf
+  assert(a == -1/0 and b == 0.0)
+  a,b = math.modf(1/0)   -- inf
+  assert(a == 1/0 and b == 0.0)
+  a,b = math.modf(0/0)   -- NaN
+  assert(a ~= a and b ~= b)
+  a,b = math.modf(3)  -- integer argument
+  assert(eqT(a, 3) and eqT(b, 0.0))
+  a,b = math.modf(minint)
+  assert(eqT(a, minint) and eqT(b, 0.0))
+end
+
+assert(math.huge > 10e30)
+assert(-math.huge < -10e30)
+
+
+-- integer arithmetic
+assert(minint < minint + 1)
+assert(maxint - 1 < maxint)
+assert(0 - minint == minint)
+assert(minint * minint == 0)
+assert(maxint * maxint * maxint == maxint)
+
+
+-- testing floor division and conversions
+
+for _, i in pairs{-16, -15, -3, -2, -1, 0, 1, 2, 3, 15} do
+  for _, j in pairs{-16, -15, -3, -2, -1, 1, 2, 3, 15} do
+    for _, ti in pairs{0, 0.0} do     -- try 'i' as integer and as float
+      for _, tj in pairs{0, 0.0} do   -- try 'j' as integer and as float
+        local x = i + ti
+        local y = j + tj
+          assert(i//j == math.floor(i/j))
+      end
+    end
+  end
+end
+
+assert(1//0.0 == 1/0)
+assert(-1 // 0.0 == -1/0)
+assert(eqT(3.5 // 1.5, 2.0))
+assert(eqT(3.5 // -1.5, -3.0))
+
+assert(maxint // maxint == 1)
+assert(maxint // 1 == maxint)
+assert((maxint - 1) // maxint == 0)
+assert(maxint // (maxint - 1) == 1)
+assert(minint // minint == 1)
+assert(minint // minint == 1)
+assert((minint + 1) // minint == 0)
+assert(minint // (minint + 1) == 1)
+assert(minint // 1 == minint)
+
+assert(minint // -1 == -minint)
+assert(minint // -2 == 2^(intbits - 2))
+assert(maxint // -1 == -maxint)
+
+
+-- negative exponents
+do
+  assert(2^-3 == 1 / 2^3)
+  assert(eq((-3)^-3, 1 / (-3)^3))
+  for i = -3, 3 do    -- variables avoid constant folding
+      for j = -3, 3 do
+        -- domain errors (0^(-n)) are not portable
+        if not _port or i ~= 0 or j > 0 then
+          assert(eq(i^j, 1 / i^(-j)))
+       end
+    end
+  end
+end
+
+-- comparison between floats and integers (border cases)
+if floatbits < intbits then
+  assert(2.0^floatbits == (1 << floatbits))
+  assert(2.0^floatbits - 1.0 == (1 << floatbits) - 1.0)
+  assert(2.0^floatbits - 1.0 ~= (1 << floatbits))
+  -- float is rounded, int is not
+  assert(2.0^floatbits + 1.0 ~= (1 << floatbits) + 1)
+else   -- floats can express all integers with full accuracy
+  assert(maxint == maxint + 0.0)
+  assert(maxint - 1 == maxint - 1.0)
+  assert(minint + 1 == minint + 1.0)
+  assert(maxint ~= maxint - 1.0)
+end
+assert(maxint + 0.0 == 2.0^(intbits - 1) - 1.0)
+assert(minint + 0.0 == minint)
+assert(minint + 0.0 == -2.0^(intbits - 1))
+
+
+-- order between floats and integers
+assert(1 < 1.1); assert(not (1 < 0.9))
+assert(1 <= 1.1); assert(not (1 <= 0.9))
+assert(-1 < -0.9); assert(not (-1 < -1.1))
+assert(1 <= 1.1); assert(not (-1 <= -1.1))
+assert(-1 < -0.9); assert(not (-1 < -1.1))
+assert(-1 <= -0.9); assert(not (-1 <= -1.1))
+assert(minint <= minint + 0.0)
+assert(minint + 0.0 <= minint)
+assert(not (minint < minint + 0.0))
+assert(not (minint + 0.0 < minint))
+assert(maxint < minint * -1.0)
+assert(maxint <= minint * -1.0)
+
+do
+  local fmaxi1 = 2^(intbits - 1)
+  assert(maxint < fmaxi1)
+  assert(maxint <= fmaxi1)
+  assert(not (fmaxi1 <= maxint))
+  assert(minint <= -2^(intbits - 1))
+  assert(-2^(intbits - 1) <= minint)
+end
+
+if floatbits < intbits then
+  print("testing order (floats cannot represent all integers)")
+  local fmax = 2^floatbits
+  local ifmax = fmax | 0
+  assert(fmax < ifmax + 1)
+  assert(fmax - 1 < ifmax)
+  assert(-(fmax - 1) > -ifmax)
+  assert(not (fmax <= ifmax - 1))
+  assert(-fmax > -(ifmax + 1))
+  assert(not (-fmax >= -(ifmax - 1)))
+
+  assert(fmax/2 - 0.5 < ifmax//2)
+  assert(-(fmax/2 - 0.5) > -ifmax//2)
+
+  assert(maxint < 2^intbits)
+  assert(minint > -2^intbits)
+  assert(maxint <= 2^intbits)
+  assert(minint >= -2^intbits)
+else
+  print("testing order (floats can represent all integers)")
+  assert(maxint < maxint + 1.0)
+  assert(maxint < maxint + 0.5)
+  assert(maxint - 1.0 < maxint)
+  assert(maxint - 0.5 < maxint)
+  assert(not (maxint + 0.0 < maxint))
+  assert(maxint + 0.0 <= maxint)
+  assert(not (maxint < maxint + 0.0))
+  assert(maxint + 0.0 <= maxint)
+  assert(maxint <= maxint + 0.0)
+  assert(not (maxint + 1.0 <= maxint))
+  assert(not (maxint + 0.5 <= maxint))
+  assert(not (maxint <= maxint - 1.0))
+  assert(not (maxint <= maxint - 0.5))
+
+  assert(minint < minint + 1.0)
+  assert(minint < minint + 0.5)
+  assert(minint <= minint + 0.5)
+  assert(minint - 1.0 < minint)
+  assert(minint - 1.0 <= minint)
+  assert(not (minint + 0.0 < minint))
+  assert(not (minint + 0.5 < minint))
+  assert(not (minint < minint + 0.0))
+  assert(minint + 0.0 <= minint)
+  assert(minint <= minint + 0.0)
+  assert(not (minint + 1.0 <= minint))
+  assert(not (minint + 0.5 <= minint))
+  assert(not (minint <= minint - 1.0))
+end
+
+do
+  local NaN = 0/0
+  assert(not (NaN < 0))
+  assert(not (NaN > minint))
+  assert(not (NaN <= -9))
+  assert(not (NaN <= maxint))
+  assert(not (NaN < maxint))
+  assert(not (minint <= NaN))
+  assert(not (minint < NaN))
+end
+
+
+-- avoiding errors at compile time
+local function checkcompt (msg, code)
+  checkerror(msg, assert(load(code)))
+end
+checkcompt("divide by zero", "return 2 // 0")
+checkcompt(msgf2i, "return 2.3 >> 0")
+checkcompt(msgf2i, ("return 2.0^%d & 1"):format(intbits - 1))
+checkcompt("field 'huge'", "return math.huge << 1")
+checkcompt(msgf2i, ("return 1 | 2.0^%d"):format(intbits - 1))
+checkcompt(msgf2i, "return 2.3 ~ '0.0'")
+
+
+-- testing overflow errors when converting from float to integer (runtime)
+local function f2i (x) return x | x end
+checkerror(msgf2i, f2i, math.huge)     -- +inf
+checkerror(msgf2i, f2i, -math.huge)    -- -inf
+checkerror(msgf2i, f2i, 0/0)           -- NaN
+
+if floatbits < intbits then
+  -- conversion tests when float cannot represent all integers
+  assert(maxint + 1.0 == maxint + 0.0)
+  assert(minint - 1.0 == minint + 0.0)
+  checkerror(msgf2i, f2i, maxint + 0.0)
+  assert(f2i(2.0^(intbits - 2)) == 1 << (intbits - 2))
+  assert(f2i(-2.0^(intbits - 2)) == -(1 << (intbits - 2)))
+  assert((2.0^(floatbits - 1) + 1.0) // 1 == (1 << (floatbits - 1)) + 1)
+  -- maximum integer representable as a float
+  local mf = maxint - (1 << (floatbits - intbits)) + 1
+  assert(f2i(mf + 0.0) == mf)  -- OK up to here
+  mf = mf + 1
+  assert(f2i(mf + 0.0) ~= mf)   -- no more representable
+else
+  -- conversion tests when float can represent all integers
+  assert(maxint + 1.0 > maxint)
+  assert(minint - 1.0 < minint)
+  assert(f2i(maxint + 0.0) == maxint)
+  checkerror("no integer rep", f2i, maxint + 1.0)
+  checkerror("no integer rep", f2i, minint - 1.0)
+end
+
+-- 'minint' should be representable as a float no matter the precision
+assert(f2i(minint + 0.0) == minint)
+
+
+-- testing numeric strings
+
+assert("2" + 1 == 3)
+assert("2 " + 1 == 3)
+assert(" -2 " + 1 == -1)
+assert(" -0xa " + 1 == -9)
+
+
+-- testing 'tonumber'
+
+-- 'tonumber' with numbers
+assert(tonumber(3.4) == 3.4)
+assert(tonumber(3) == 3 and math.type(tonumber(3)) == "integer")
+assert(tonumber(maxint) == maxint and tonumber(minint) == minint)
+assert(tonumber(1/0) == 1/0)
+
+-- 'tonumber' with strings
+assert(tonumber("0") == 0)
+assert(tonumber("") == nil)
+assert(tonumber("  ") == nil)
+assert(tonumber("-") == nil)
+assert(tonumber("  -0x ") == nil)
+assert(tonumber{} == nil)
+assert(tonumber'+0.01' == 1/100 and tonumber'+.01' == 0.01 and
+       tonumber'.01' == 0.01    and tonumber'-1.' == -1 and
+       tonumber'+1.' == 1)
+assert(tonumber'+ 0.01' == nil and tonumber'+.e1' == nil and
+       tonumber'1e' == nil     and tonumber'1.0e+' == nil and
+       tonumber'.' == nil)
+assert(tonumber('-012') == -010-2)
+assert(tonumber('-1.2e2') == - - -120)
+
+assert(tonumber("0xffffffffffff") == (1 << (4*12)) - 1)
+assert(tonumber("0x"..string.rep("f", (intbits//4))) == -1)
+assert(tonumber("-0x"..string.rep("f", (intbits//4))) == 1)
+
+-- testing 'tonumber' with base
+assert(tonumber('  001010  ', 2) == 10)
+assert(tonumber('  001010  ', 10) == 001010)
+assert(tonumber('  -1010  ', 2) == -10)
+assert(tonumber('10', 36) == 36)
+assert(tonumber('  -10  ', 36) == -36)
+assert(tonumber('  +1Z  ', 36) == 36 + 35)
+assert(tonumber('  -1z  ', 36) == -36 + -35)
+assert(tonumber('-fFfa', 16) == -(10+(16*(15+(16*(15+(16*15)))))))
+assert(tonumber(string.rep('1', (intbits - 2)), 2) + 1 == 2^(intbits - 2))
+assert(tonumber('ffffFFFF', 16)+1 == (1 << 32))
+assert(tonumber('0ffffFFFF', 16)+1 == (1 << 32))
+assert(tonumber('-0ffffffFFFF', 16) - 1 == -(1 << 40))
+for i = 2,36 do
+  local i2 = i * i
+  local i10 = i2 * i2 * i2 * i2 * i2      -- i^10
+  assert(tonumber('\t10000000000\t', i) == i10)
+end
+
+if not _soft then
+  -- tests with very long numerals
+  assert(tonumber("0x"..string.rep("f", 13)..".0") == 2.0^(4*13) - 1)
+  assert(tonumber("0x"..string.rep("f", 150)..".0") == 2.0^(4*150) - 1)
+  assert(tonumber("0x"..string.rep("f", 300)..".0") == 2.0^(4*300) - 1)
+  assert(tonumber("0x"..string.rep("f", 500)..".0") == 2.0^(4*500) - 1)
+  assert(tonumber('0x3.' .. string.rep('0', 1000)) == 3)
+  assert(tonumber('0x' .. string.rep('0', 1000) .. 'a') == 10)
+  assert(tonumber('0x0.' .. string.rep('0', 13).."1") == 2.0^(-4*14))
+  assert(tonumber('0x0.' .. string.rep('0', 150).."1") == 2.0^(-4*151))
+  assert(tonumber('0x0.' .. string.rep('0', 300).."1") == 2.0^(-4*301))
+  assert(tonumber('0x0.' .. string.rep('0', 500).."1") == 2.0^(-4*501))
+
+  assert(tonumber('0xe03' .. string.rep('0', 1000) .. 'p-4000') == 3587.0)
+  assert(tonumber('0x.' .. string.rep('0', 1000) .. '74p4004') == 0x7.4)
+end
+
+-- testing 'tonumber' for invalid formats
+
+local function f (...)
+  if select('#', ...) == 1 then
+    return (...)
+  else
+    return "***"
+  end
+end
+
+assert(f(tonumber('fFfa', 15)) == nil)
+assert(f(tonumber('099', 8)) == nil)
+assert(f(tonumber('1\0', 2)) == nil)
+assert(f(tonumber('', 8)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('0xf', 10)) == nil)
+
+assert(f(tonumber('inf')) == nil)
+assert(f(tonumber(' INF ')) == nil)
+assert(f(tonumber('Nan')) == nil)
+assert(f(tonumber('nan')) == nil)
+
+assert(f(tonumber('  ')) == nil)
+assert(f(tonumber('')) == nil)
+assert(f(tonumber('1  a')) == nil)
+assert(f(tonumber('1  a', 2)) == nil)
+assert(f(tonumber('1\0')) == nil)
+assert(f(tonumber('1 \0')) == nil)
+assert(f(tonumber('1\0 ')) == nil)
+assert(f(tonumber('e1')) == nil)
+assert(f(tonumber('e  1')) == nil)
+assert(f(tonumber(' 3.4.5 ')) == nil)
+
+
+-- testing 'tonumber' for invalid hexadecimal formats
+
+assert(tonumber('0x') == nil)
+assert(tonumber('x') == nil)
+assert(tonumber('x3') == nil)
+assert(tonumber('0x3.3.3') == nil)   -- two decimal points
+assert(tonumber('00x2') == nil)
+assert(tonumber('0x 2') == nil)
+assert(tonumber('0 x2') == nil)
+assert(tonumber('23x') == nil)
+assert(tonumber('- 0xaa') == nil)
+assert(tonumber('-0xaaP ') == nil)   -- no exponent
+assert(tonumber('0x0.51p') == nil)
+assert(tonumber('0x5p+-2') == nil)
+
+
+-- testing hexadecimal numerals
+
+assert(0x10 == 16 and 0xfff == 2^12 - 1 and 0XFB == 251)
+assert(0x0p12 == 0 and 0x.0p-3 == 0)
+assert(0xFFFFFFFF == (1 << 32) - 1)
+assert(tonumber('+0x2') == 2)
+assert(tonumber('-0xaA') == -170)
+assert(tonumber('-0xffFFFfff') == -(1 << 32) + 1)
+
+-- possible confusion with decimal exponent
+assert(0E+1 == 0 and 0xE+1 == 15 and 0xe-1 == 13)
+
+
+-- floating hexas
+
+assert(tonumber('  0x2.5  ') == 0x25/16)
+assert(tonumber('  -0x2.5  ') == -0x25/16)
+assert(tonumber('  +0x0.51p+8  ') == 0x51)
+assert(0x.FfffFFFF == 1 - '0x.00000001')
+assert('0xA.a' + 0 == 10 + 10/16)
+assert(0xa.aP4 == 0XAA)
+assert(0x4P-2 == 1)
+assert(0x1.1 == '0x1.' + '+0x.1')
+assert(0Xabcdef.0 == 0x.ABCDEFp+24)
+
+
+assert(1.1 == 1.+.1)
+assert(100.0 == 1E2 and .01 == 1e-2)
+assert(1111111111111111-1111111111111110== 1000.00e-03)
+--     1234567890123456
+assert(1.1 == '1.'+'.1')
+assert(tonumber'1111111111111111'-tonumber'1111111111111110' ==
+       tonumber"  +0.001e+3 \n\t")
+
+assert(0.1e-30 > 0.9E-31 and 0.9E30 < 0.1e31)
+
+assert(0.123456 > 0.123455)
+
+assert(tonumber('+1.23E18') == 1.23*10.0^18)
+
+-- testing order operators
+assert(not(1<1) and (1<2) and not(2<1))
+assert(not('a'<'a') and ('a'<'b') and not('b'<'a'))
+assert((1<=1) and (1<=2) and not(2<=1))
+assert(('a'<='a') and ('a'<='b') and not('b'<='a'))
+assert(not(1>1) and not(1>2) and (2>1))
+assert(not('a'>'a') and not('a'>'b') and ('b'>'a'))
+assert((1>=1) and not(1>=2) and (2>=1))
+assert(('a'>='a') and not('a'>='b') and ('b'>='a'))
+assert(1.3 < 1.4 and 1.3 <= 1.4 and not (1.3 < 1.3) and 1.3 <= 1.3)
+
+-- testing mod operator
+assert(eqT(-4 % 3, 2))
+assert(eqT(4 % -3, -2))
+assert(eqT(-4.0 % 3, 2.0))
+assert(eqT(4 % -3.0, -2.0))
+assert(math.pi - math.pi % 1 == 3)
+assert(math.pi - math.pi % 0.001 == 3.141)
+
+assert(eqT(minint % minint, 0))
+assert(eqT(maxint % maxint, 0))
+assert((minint + 1) % minint == minint + 1)
+assert((maxint - 1) % maxint == maxint - 1)
+assert(minint % maxint == maxint - 1)
+
+assert(minint % -1 == 0)
+assert(minint % -2 == 0)
+assert(maxint % -2 == -1)
+
+-- non-portable tests because Windows C library cannot compute 
+-- fmod(1, huge) correctly
+if not _port then
+  local function anan (x) assert(x ~= x) end   -- assert Not a Number
+  anan(0.0 % 0)
+  anan(1.3 % 0)
+  anan(math.huge % 1)
+  anan(math.huge % 1e30)
+  anan(-math.huge % 1e30)
+  anan(-math.huge % -1e30)
+  assert(1 % math.huge == 1)
+  assert(1e30 % math.huge == 1e30)
+  assert(1e30 % -math.huge == -math.huge)
+  assert(-1 % math.huge == math.huge)
+  assert(-1 % -math.huge == -1)
+end
+
+
+-- testing unsigned comparisons
+assert(math.ult(3, 4))
+assert(not math.ult(4, 4))
+assert(math.ult(-2, -1))
+assert(math.ult(2, -1))
+assert(not math.ult(-2, -2))
+assert(math.ult(maxint, minint))
+assert(not math.ult(minint, maxint))
+
+
+assert(eq(math.sin(-9.8)^2 + math.cos(-9.8)^2, 1))
+assert(eq(math.tan(math.pi/4), 1))
+assert(eq(math.sin(math.pi/2), 1) and eq(math.cos(math.pi/2), 0))
+assert(eq(math.atan(1), math.pi/4) and eq(math.acos(0), math.pi/2) and
+       eq(math.asin(1), math.pi/2))
+assert(eq(math.deg(math.pi/2), 90) and eq(math.rad(90), math.pi/2))
+assert(math.abs(-10.43) == 10.43)
+assert(eqT(math.abs(minint), minint))
+assert(eqT(math.abs(maxint), maxint))
+assert(eqT(math.abs(-maxint), maxint))
+assert(eq(math.atan(1,0), math.pi/2))
+assert(math.fmod(10,3) == 1)
+assert(eq(math.sqrt(10)^2, 10))
+assert(eq(math.log(2, 10), math.log(2)/math.log(10)))
+assert(eq(math.log(2, 2), 1))
+assert(eq(math.log(9, 3), 2))
+assert(eq(math.exp(0), 1))
+assert(eq(math.sin(10), math.sin(10%(2*math.pi))))
+
+
+assert(tonumber(' 1.3e-2 ') == 1.3e-2)
+assert(tonumber(' -1.00000000000001 ') == -1.00000000000001)
+
+-- testing constant limits
+-- 2^23 = 8388608
+assert(8388609 + -8388609 == 0)
+assert(8388608 + -8388608 == 0)
+assert(8388607 + -8388607 == 0)
+
+
+
+do   -- testing floor & ceil
+  assert(eqT(math.floor(3.4), 3))
+  assert(eqT(math.ceil(3.4), 4))
+  assert(eqT(math.floor(-3.4), -4))
+  assert(eqT(math.ceil(-3.4), -3))
+  assert(eqT(math.floor(maxint), maxint))
+  assert(eqT(math.ceil(maxint), maxint))
+  assert(eqT(math.floor(minint), minint))
+  assert(eqT(math.floor(minint + 0.0), minint))
+  assert(eqT(math.ceil(minint), minint))
+  assert(eqT(math.ceil(minint + 0.0), minint))
+  assert(math.floor(1e50) == 1e50)
+  assert(math.ceil(1e50) == 1e50)
+  assert(math.floor(-1e50) == -1e50)
+  assert(math.ceil(-1e50) == -1e50)
+  for _, p in pairs{31,32,63,64} do
+    assert(math.floor(2^p) == 2^p)
+    assert(math.floor(2^p + 0.5) == 2^p)
+    assert(math.ceil(2^p) == 2^p)
+    assert(math.ceil(2^p - 0.5) == 2^p)
+  end
+  checkerror("number expected", math.floor, {})
+  checkerror("number expected", math.ceil, print)
+  assert(eqT(math.tointeger(minint), minint))
+  assert(eqT(math.tointeger(minint .. ""), minint))
+  assert(eqT(math.tointeger(maxint), maxint))
+  assert(eqT(math.tointeger(maxint .. ""), maxint))
+  assert(eqT(math.tointeger(minint + 0.0), minint))
+  assert(math.tointeger(0.0 - minint) == nil)
+  assert(math.tointeger(math.pi) == nil)
+  assert(math.tointeger(-math.pi) == nil)
+  assert(math.floor(math.huge) == math.huge)
+  assert(math.ceil(math.huge) == math.huge)
+  assert(math.tointeger(math.huge) == nil)
+  assert(math.floor(-math.huge) == -math.huge)
+  assert(math.ceil(-math.huge) == -math.huge)
+  assert(math.tointeger(-math.huge) == nil)
+  assert(math.tointeger("34.0") == 34)
+  assert(math.tointeger("34.3") == nil)
+  assert(math.tointeger({}) == nil)
+  assert(math.tointeger(0/0) == nil)    -- NaN
+end
+
+
+-- testing fmod for integers
+for i = -6, 6 do
+  for j = -6, 6 do
+    if j ~= 0 then
+      local mi = math.fmod(i, j)
+      local mf = math.fmod(i + 0.0, j)
+      assert(mi == mf)
+      assert(math.type(mi) == 'integer' and math.type(mf) == 'float')
+      if (i >= 0 and j >= 0) or (i <= 0 and j <= 0) or mi == 0 then
+        assert(eqT(mi, i % j))
+      end
+    end
+  end
+end
+assert(eqT(math.fmod(minint, minint), 0))
+assert(eqT(math.fmod(maxint, maxint), 0))
+assert(eqT(math.fmod(minint + 1, minint), minint + 1))
+assert(eqT(math.fmod(maxint - 1, maxint), maxint - 1))
+
+checkerror("zero", math.fmod, 3, 0)
+
+
+do    -- testing max/min
+  checkerror("value expected", math.max)
+  checkerror("value expected", math.min)
+  assert(eqT(math.max(3), 3))
+  assert(eqT(math.max(3, 5, 9, 1), 9))
+  assert(math.max(maxint, 10e60) == 10e60)
+  assert(eqT(math.max(minint, minint + 1), minint + 1))
+  assert(eqT(math.min(3), 3))
+  assert(eqT(math.min(3, 5, 9, 1), 1))
+  assert(math.min(3.2, 5.9, -9.2, 1.1) == -9.2)
+  assert(math.min(1.9, 1.7, 1.72) == 1.7)
+  assert(math.min(-10e60, minint) == -10e60)
+  assert(eqT(math.min(maxint, maxint - 1), maxint - 1))
+  assert(eqT(math.min(maxint - 2, maxint, maxint - 1), maxint - 2))
+end
+-- testing implicit convertions
+
+local a,b = '10', '20'
+assert(a*b == 200 and a+b == 30 and a-b == -10 and a/b == 0.5 and -b == -20)
+assert(a == '10' and b == '20')
+
+
+do
+  print("testing -0 and NaN")
+  local mz, z = -0.0, 0.0
+  assert(mz == z)
+  assert(1/mz < 0 and 0 < 1/z)
+  local a = {[mz] = 1}
+  assert(a[z] == 1 and a[mz] == 1)
+  a[z] = 2
+  assert(a[z] == 2 and a[mz] == 2)
+  local inf = math.huge * 2 + 1
+  mz, z = -1/inf, 1/inf
+  assert(mz == z)
+  assert(1/mz < 0 and 0 < 1/z)
+  local NaN = inf - inf
+  assert(NaN ~= NaN)
+  assert(not (NaN < NaN))
+  assert(not (NaN <= NaN))
+  assert(not (NaN > NaN))
+  assert(not (NaN >= NaN))
+  assert(not (0 < NaN) and not (NaN < 0))
+  local NaN1 = 0/0
+  assert(NaN ~= NaN1 and not (NaN <= NaN1) and not (NaN1 <= NaN))
+  local a = {}
+  assert(not pcall(rawset, a, NaN, 1))
+  assert(a[NaN] == nil)
+  a[1] = 1
+  assert(not pcall(rawset, a, NaN, 1))
+  assert(a[NaN] == nil)
+  -- strings with same binary representation as 0.0 (might create problems
+  -- for constant manipulation in the pre-compiler)
+  local a1, a2, a3, a4, a5 = 0, 0, "\0\0\0\0\0\0\0\0", 0, "\0\0\0\0\0\0\0\0"
+  assert(a1 == a2 and a2 == a4 and a1 ~= a3)
+  assert(a3 == a5)
+end
+
+
+print("testing 'math.random'")
+math.randomseed(0)
+
+do   -- test random for floats
+  local max = -math.huge
+  local min = math.huge
+  for i = 0, 20000 do
+    local t = math.random()
+    assert(0 <= t and t < 1)
+    max = math.max(max, t)
+    min = math.min(min, t)
+    if eq(max, 1, 0.001) and eq(min, 0, 0.001) then
+      goto ok
+    end
+  end
+  -- loop ended without satisfing condition
+  assert(false)
+ ::ok::
+end
+
+do
+  local function aux (p, lim)   -- test random for small intervals
+    local x1, x2
+    if #p == 1 then x1 = 1; x2 = p[1]
+    else x1 = p[1]; x2 = p[2]
+    end
+    local mark = {}; local count = 0   -- to check that all values appeared
+    for i = 0, lim or 2000 do
+      local t = math.random(table.unpack(p))
+      assert(x1 <= t and t <= x2)
+      if not mark[t] then  -- new value
+        mark[t] = true
+        count = count + 1
+      end
+      if count == x2 - x1 + 1 then   -- all values appeared; OK
+        goto ok
+      end
+    end
+    -- loop ended without satisfing condition
+    assert(false)
+   ::ok::
+  end
+
+  aux({-10,0})
+  aux({6})
+  aux({-10, 10})
+  aux({minint, minint})
+  aux({maxint, maxint})
+  aux({minint, minint + 9})
+  aux({maxint - 3, maxint})
+end
+
+do
+  local function aux(p1, p2)       -- test random for large intervals
+    local max = minint
+    local min = maxint
+    local n = 200
+    local mark = {}; local count = 0   -- to count how many different values
+    for _ = 1, n do
+      local t = math.random(p1, p2)
+      max = math.max(max, t)
+      min = math.min(min, t)
+      if not mark[t] then  -- new value
+        mark[t] = true
+        count = count + 1
+      end
+    end
+    -- at least 80% of values are different
+    assert(count >= n * 0.8)
+    -- min and max not too far from formal min and max
+    local diff = (p2 - p1) // 8
+    assert(min < p1 + diff and max > p2 - diff)
+  end
+  aux(0, maxint)
+  aux(1, maxint)
+  aux(minint, -1)
+  aux(minint // 2, maxint // 2)
+end
+
+for i=1,100 do
+  assert(math.random(maxint) > 0)
+  assert(math.random(minint, -1) < 0)
+end
+
+assert(not pcall(math.random, 1, 2, 3))    -- too many arguments
+
+-- empty interval
+assert(not pcall(math.random, minint + 1, minint))
+assert(not pcall(math.random, maxint, maxint - 1))
+assert(not pcall(math.random, maxint, minint))
+
+-- interval too large
+assert(not pcall(math.random, minint, 0))
+assert(not pcall(math.random, -1, maxint))
+assert(not pcall(math.random, minint // 2, maxint // 2 + 1))
+
+
+print('OK')
diff --git a/lua-5.3.1-tests/nextvar.lua b/lua-5.3.1-tests/nextvar.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/nextvar.lua
@@ -0,0 +1,615 @@
+-- $Id: nextvar.lua,v 1.77 2015/04/06 21:12:51 roberto Exp $
+
+print('testing tables, next, and for')
+
+local a = {}
+
+-- make sure table has lots of space in hash part
+for i=1,100 do a[i.."+"] = true end
+for i=1,100 do a[i.."+"] = nil end
+-- fill hash part with numeric indices testing size operator
+for i=1,100 do
+  a[i] = true
+  assert(#a == i)
+end
+
+-- testing ipairs
+local x = 0
+for k,v in ipairs{10,20,30;x=12} do
+  x = x + 1
+  assert(k == x and v == x * 10)
+end
+
+for _ in ipairs{x=12, y=24} do assert(nil) end
+
+-- test for 'false' x ipair
+x = false
+local i = 0
+for k,v in ipairs{true,false,true,false} do
+  i = i + 1
+  x = not x
+  assert(x == v)
+end
+assert(i == 4)
+
+-- iterator function is always the same
+assert(type(ipairs{}) == 'function' and ipairs{} == ipairs{})
+
+
+if not T then
+  (Message or print)
+    ('\n >>> testC not active: skipping tests for table sizes <<<\n')
+else --[
+-- testing table sizes
+
+local function log2 (x) return math.log(x, 2) end
+
+local function mp2 (n)   -- minimum power of 2 >= n
+  local mp = 2^math.ceil(log2(n))
+  assert(n == 0 or (mp/2 < n and n <= mp))
+  return mp
+end
+
+local function fb (n)
+  local r, nn = T.int2fb(n)
+  assert(r < 256)
+  return nn
+end
+
+-- test fb function
+for a = 1, 10000 do   -- all numbers up to 10^4
+  local n = fb(a)
+  assert(a <= n and n <= a*1.125)
+end
+local a = 1024   -- plus a few up to 2 ^30
+local lim = 2^30
+while a < lim do
+  local n = fb(a)
+  assert(a <= n and n <= a*1.125)
+  a = math.ceil(a*1.3)
+end
+
+ 
+local function check (t, na, nh)
+  local a, h = T.querytab(t)
+  if a ~= na or h ~= nh then
+    print(na, nh, a, h)
+    assert(nil)
+  end
+end
+
+
+-- testing C library sizes
+do
+  local s = 0
+  for _ in pairs(math) do s = s + 1 end
+  check(math, 0, mp2(s))
+end
+
+
+-- testing constructor sizes
+local lim = 40
+local s = 'return {'
+for i=1,lim do
+  s = s..i..','
+  local s = s
+  for k=0,lim do 
+    local t = load(s..'}', '')()
+    assert(#t == i)
+    check(t, fb(i), mp2(k))
+    s = string.format('%sa%d=%d,', s, k, k)
+  end
+end
+
+
+-- tests with unknown number of elements
+local a = {}
+for i=1,lim do a[i] = i end   -- build auxiliary table
+for k=0,lim do
+  local a = {table.unpack(a,1,k)}
+  assert(#a == k)
+  check(a, k, 0)
+  a = {1,2,3,table.unpack(a,1,k)}
+  check(a, k+3, 0)
+  assert(#a == k + 3)
+end
+
+
+-- testing tables dynamically built
+local lim = 130
+local a = {}; a[2] = 1; check(a, 0, 1)
+a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
+a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
+a = {}
+for i = 1,lim do
+  a[i] = 1
+  assert(#a == i)
+  check(a, mp2(i), 0)
+end
+
+a = {}
+for i = 1,lim do
+  a['a'..i] = 1
+  assert(#a == 0)
+  check(a, 0, mp2(i))
+end
+
+a = {}
+for i=1,16 do a[i] = i end
+check(a, 16, 0)
+do
+  for i=1,11 do a[i] = nil end
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 8)   -- only 5 elements in the table
+  a[10] = 1
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 8)   -- only 6 elements in the table
+  for i=1,14 do a[i] = nil end
+  for i=18,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 4)   -- only 2 elements ([15] and [16])
+end
+
+-- reverse filling
+for i=1,lim do
+  local a = {}
+  for i=i,1,-1 do a[i] = i end   -- fill in reverse
+  check(a, mp2(i), 0)
+end
+
+-- size tests for vararg
+lim = 35
+function foo (n, ...)
+  local arg = {...}
+  check(arg, n, 0)
+  assert(select('#', ...) == n)
+  arg[n+1] = true
+  check(arg, mp2(n+1), 0)
+  arg.x = true
+  check(arg, mp2(n+1), 1)
+end
+local a = {}
+for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
+
+end  --]
+
+
+-- test size operation on empty tables
+assert(#{} == 0)
+assert(#{nil} == 0)
+assert(#{nil, nil} == 0)
+assert(#{nil, nil, nil} == 0)
+assert(#{nil, nil, nil, nil} == 0)
+print'+'
+
+
+local nofind = {}
+
+a,b,c = 1,2,3
+a,b,c = nil
+
+
+-- next uses always the same iteraction function
+assert(next{} == next{})
+
+local function find (name)
+  local n,v
+  while 1 do
+    n,v = next(_G, n)
+    if not n then return nofind end
+    assert(v ~= nil)
+    if n == name then return v end
+  end
+end
+
+local function find1 (name)
+  for n,v in pairs(_G) do
+    if n==name then return v end
+  end
+  return nil  -- not found
+end
+
+
+assert(print==find("print") and print == find1("print"))
+assert(_G["print"]==find("print"))
+assert(assert==find1("assert"))
+assert(nofind==find("return"))
+assert(not find1("return"))
+_G["ret" .. "urn"] = nil
+assert(nofind==find("return"))
+_G["xxx"] = 1
+assert(xxx==find("xxx"))
+
+-- invalid key to 'next'
+assert(string.find(select(2, pcall(next, {10,20}, 3)), "invalid key"))
+
+-- both 'pairs' and 'ipairs' need an argument
+assert(string.find(select(2, pcall(pairs)), "bad argument"))
+assert(string.find(select(2, pcall(ipairs)), "bad argument"))
+
+print('+')
+
+a = {}
+for i=0,10000 do
+  if math.fmod(i,10) ~= 0 then
+    a['x'..i] = i
+  end
+end
+
+n = {n=0}
+for i,v in pairs(a) do
+  n.n = n.n+1
+  assert(i and v and a[i] == v)
+end
+assert(n.n == 9000)
+a = nil
+
+do   -- clear global table
+  local a = {}
+  for n,v in pairs(_G) do a[n]=v end
+  for n,v in pairs(a) do
+    if not package.loaded[n] and type(v) ~= "function" and
+       not string.find(n, "^[%u_]") then
+     _G[n] = nil
+    end
+    collectgarbage()
+  end
+end
+
+
+-- 
+
+local function checknext (a)
+  local b = {}
+  do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
+  for k,v in pairs(b) do assert(a[k] == v) end
+  for k,v in pairs(a) do assert(b[k] == v) end
+end
+
+checknext{1,x=1,y=2,z=3}
+checknext{1,2,x=1,y=2,z=3}
+checknext{1,2,3,x=1,y=2,z=3}
+checknext{1,2,3,4,x=1,y=2,z=3}
+checknext{1,2,3,4,5,x=1,y=2,z=3}
+
+assert(#{} == 0)
+assert(#{[-1] = 2} == 0)
+assert(#{1,2,3,nil,nil} == 3)
+for i=0,40 do
+  local a = {}
+  for j=1,i do a[j]=j end
+  assert(#a == i)
+end
+
+-- 'maxn' is now deprecated, but it is easily defined in Lua
+function table.maxn (t)
+  local max = 0
+  for k in pairs(t) do
+    max = (type(k) == 'number') and math.max(max, k) or max
+  end
+  return max
+end
+
+assert(table.maxn{} == 0)
+assert(table.maxn{["1000"] = true} == 0)
+assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
+assert(table.maxn{[1000] = true} == 1000)
+assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
+
+table.maxn = nil
+
+-- int overflow
+a = {}
+for i=0,50 do a[2^i] = true end
+assert(a[#a])
+
+print('+')
+
+
+-- erasing values
+local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
+           [100.3] = 4, [4] = 5}
+
+local n = 0
+for k, v in pairs( t ) do
+  n = n+1
+  assert(t[k] == v)
+  t[k] = nil
+  collectgarbage()
+  assert(t[k] == nil)
+end
+assert(n == 5)
+
+
+local function test (a)
+  assert(not pcall(table.insert, a, 2, 20));
+  table.insert(a, 10); table.insert(a, 2, 20);
+  table.insert(a, 1, -1); table.insert(a, 40);
+  table.insert(a, #a+1, 50)
+  table.insert(a, 2, -2)
+  assert(not pcall(table.insert, a, 0, 20));
+  assert(not pcall(table.insert, a, #a + 2, 20));
+  assert(table.remove(a,1) == -1)
+  assert(table.remove(a,1) == -2)
+  assert(table.remove(a,1) == 10)
+  assert(table.remove(a,1) == 20)
+  assert(table.remove(a,1) == 40)
+  assert(table.remove(a,1) == 50)
+  assert(table.remove(a,1) == nil)
+  assert(table.remove(a) == nil)
+  assert(table.remove(a, #a) == nil)
+end
+
+a = {n=0, [-7] = "ban"}
+test(a)
+assert(a.n == 0 and a[-7] == "ban")
+
+a = {[-7] = "ban"};
+test(a)
+assert(a.n == nil and #a == 0 and a[-7] == "ban")
+
+a = {[-1] = "ban"}
+test(a)
+assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
+
+a = {[0] = "ban"}
+assert(#a == 0 and table.remove(a) == "ban" and a[0] == nil)
+
+table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
+assert(table.remove(a) == 10)
+assert(table.remove(a) == 20)
+assert(table.remove(a) == -1)
+assert(table.remove(a) == nil)
+
+a = {'c', 'd'}
+table.insert(a, 3, 'a')
+table.insert(a, 'b')
+assert(table.remove(a, 1) == 'c')
+assert(table.remove(a, 1) == 'd')
+assert(table.remove(a, 1) == 'a')
+assert(table.remove(a, 1) == 'b')
+assert(table.remove(a, 1) == nil)
+assert(#a == 0 and a.n == nil)
+
+a = {10,20,30,40}
+assert(table.remove(a, #a + 1) == nil)
+assert(not pcall(table.remove, a, 0))
+assert(a[#a] == 40)
+assert(table.remove(a, #a) == 40)
+assert(a[#a] == 30)
+assert(table.remove(a, 2) == 20)
+assert(a[#a] == 30 and #a == 2)
+
+do   -- testing table library with metamethods
+  local function test (proxy, t)
+    for i = 1, 10 do
+      table.insert(proxy, 1, i)
+    end
+    assert(#proxy == 10 and #t == 10)
+    for i = 1, 10 do
+      assert(t[i] == 11 - i)
+    end
+    table.sort(proxy)
+    for i = 1, 10 do
+      assert(t[i] == i and proxy[i] == i)
+    end
+    assert(table.concat(proxy, ",") == "1,2,3,4,5,6,7,8,9,10")
+    for i = 1, 8 do
+      assert(table.remove(proxy, 1) == i)
+    end
+    assert(#proxy == 2 and #t == 2)
+    local a, b, c = table.unpack(proxy)
+    assert(a == 9 and b == 10 and c == nil)
+  end
+
+  -- all virtual
+  local t = {}
+  local proxy = setmetatable({}, {
+    __len = function () return #t end,
+    __index = t,
+    __newindex = t,
+  })
+  test(proxy, t)
+
+  -- only __newindex
+  local count = 0
+  t = setmetatable({}, {
+    __newindex = function (t,k,v) count = count + 1; rawset(t,k,v) end})
+  test(t, t)
+  assert(count == 10)   -- after first 10, all other sets are not new
+
+  -- no __newindex
+  t = setmetatable({}, {
+    __index = function (_,k) return k + 1 end,
+    __len = function (_) return 5 end})
+  assert(table.concat(t, ";") == "2;3;4;5;6")
+
+end
+
+do
+  -- Test to ensure that, when there are no metamethods,
+  -- library uses raw access.
+  -- (tricky: assumes undocumented behavior that test for presence of
+  --  metamethods is done before getting the length of the table)
+  local t = setmetatable({}, {
+    -- once 'len' is called, only raw access will work
+    __len = function (t)
+              getmetatable(t).__index = error
+              getmetatable(t).__newindex = error
+              return 10
+            end
+  })
+  table.insert(t, 1, 10)  -- work
+  assert(rawget(t, 1) == 10)
+  assert(not pcall(table.insert, t, 20))  -- does not work any more
+
+  -- still does not work
+  assert(not pcall(table.sort, t, function (_,_) return false end))
+  -- reset access
+  getmetatable(t).__index = nil
+  getmetatable(t).__newindex = nil
+  -- now it works again
+  assert(pcall(table.sort, t, function (_,_) return false end))
+  -- not any more
+  assert(not pcall(table.sort, t, function (_,_) return false end))
+end
+      
+print('+')
+
+a = {}
+for i=1,1000 do
+  a[i] = i; a[i-1] = nil
+end
+assert(next(a,nil) == 1000 and next(a,1000) == nil)
+
+assert(next({}) == nil)
+assert(next({}, nil) == nil)
+
+for a,b in pairs{} do error"not here" end
+for i=1,0 do error'not here' end
+for i=0,1,-1 do error'not here' end
+a = nil; for i=1,1 do assert(not a); a=1 end; assert(a)
+a = nil; for i=1,1,-1 do assert(not a); a=1 end; assert(a)
+
+do
+  print("testing floats in numeric for")
+  local a
+  -- integer count
+  a = 0; for i=1, 1, 1 do a=a+1 end; assert(a==1)
+  a = 0; for i=10000, 1e4, -1 do a=a+1 end; assert(a==1)
+  a = 0; for i=1, 0.99999, 1 do a=a+1 end; assert(a==0)
+  a = 0; for i=9999, 1e4, -1 do a=a+1 end; assert(a==0)
+  a = 0; for i=1, 0.99999, -1 do a=a+1 end; assert(a==1)
+
+  -- float count
+  a = 0; for i=0, 0.999999999, 0.1 do a=a+1 end; assert(a==10)
+  a = 0; for i=1.0, 1, 1 do a=a+1 end; assert(a==1)
+  a = 0; for i=-1.5, -1.5, 1 do a=a+1 end; assert(a==1)
+  a = 0; for i=1e6, 1e6, -1 do a=a+1 end; assert(a==1)
+  a = 0; for i=1.0, 0.99999, 1 do a=a+1 end; assert(a==0)
+  a = 0; for i=99999, 1e5, -1.0 do a=a+1 end; assert(a==0)
+  a = 0; for i=1.0, 0.99999, -1 do a=a+1 end; assert(a==1)
+end
+
+-- conversion
+a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
+
+do  -- checking types
+  local c
+  local function checkfloat (i)
+    assert(math.type(i) == "float")
+    c = c + 1
+  end
+
+  c = 0; for i = 1.0, 10 do checkfloat(i) end
+  assert(c == 10)
+
+  c = 0; for i = -1, -10, -1.0 do checkfloat(i) end
+  assert(c == 10)
+
+  local function checkint (i)
+    assert(math.type(i) == "integer")
+    c = c + 1
+  end
+
+  local m = math.maxinteger
+  c = 0; for i = m, m - 10, -1 do checkint(i) end
+  assert(c == 11)
+
+  c = 0; for i = 1, 10.9 do checkint(i) end
+  assert(c == 10)
+
+  c = 0; for i = 10, 0.001, -1 do checkint(i) end
+  assert(c == 10)
+
+  c = 0; for i = 1, "10.8" do checkint(i) end
+  assert(c == 10)
+
+  c = 0; for i = 9, "3.4", -1 do checkint(i) end
+  assert(c == 6)
+
+  c = 0; for i = 0, " -3.4  ", -1 do checkint(i) end
+  assert(c == 4)
+
+  c = 0; for i = 100, "96.3", -2 do checkint(i) end
+  assert(c == 2)
+
+  c = 0; for i = 1, math.huge do if i > 10 then break end; checkint(i) end
+  assert(c == 10)
+
+  c = 0; for i = -1, -math.huge, -1 do
+           if i < -10 then break end; checkint(i)
+          end
+  assert(c == 10)
+
+
+  for i = math.mininteger, -10e100 do assert(false) end
+  for i = math.maxinteger, 10e100, -1 do assert(false) end
+
+end
+
+collectgarbage()
+
+
+-- testing generic 'for'
+
+local function f (n, p)
+  local t = {}; for i=1,p do t[i] = i*10 end
+  return function (_,n)
+           if n > 0 then
+             n = n-1
+             return n, table.unpack(t)
+           end
+         end, nil, n
+end
+
+local x = 0
+for n,a,b,c,d in f(5,3) do
+  x = x+1
+  assert(a == 10 and b == 20 and c == 30 and d == nil)
+end
+assert(x == 5)
+
+
+
+-- testing __pairs and __ipairs metamethod
+a = {}
+do
+  local x,y,z = pairs(a)
+  assert(type(x) == 'function' and y == a and z == nil)
+end
+
+local function foo (e,i)
+  assert(e == a)
+  if i <= 10 then return i+1, i+2 end
+end
+
+local function foo1 (e,i)
+  i = i + 1
+  assert(e == a)
+  if i <= e.n then return i,a[i] end
+end
+
+setmetatable(a, {__pairs = function (x) return foo, x, 0 end})
+
+local i = 0
+for k,v in pairs(a) do
+  i = i + 1
+  assert(k == i and v == k+1)
+end
+
+a.n = 5
+a[3] = 30
+
+-- testing ipairs with metamethods
+a = {n=10}
+setmetatable(a, { __index = function (t,k)
+                     if k <= t.n then return k * 10 end 
+                  end})
+i = 0
+for k,v in ipairs(a) do
+  i = i + 1
+  assert(k == i and v == i * 10)
+end
+assert(i == a.n)
+
+print"OK"
diff --git a/lua-5.3.1-tests/pm.lua b/lua-5.3.1-tests/pm.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/pm.lua
@@ -0,0 +1,358 @@
+-- $Id: pm.lua,v 1.44 2015/03/04 13:09:38 roberto Exp $
+
+print('testing pattern matching')
+
+local function checkerror (msg, f, ...)
+  local s, err = pcall(f, ...)
+  assert(not s and string.find(err, msg))
+end
+
+
+function f(s, p)
+  local i,e = string.find(s, p)
+  if i then return string.sub(s, i, e) end
+end
+
+a,b = string.find('', '')    -- empty patterns are tricky
+assert(a == 1 and b == 0);
+a,b = string.find('alo', '')
+assert(a == 1 and b == 0)
+a,b = string.find('a\0o a\0o a\0o', 'a', 1)   -- first position
+assert(a == 1 and b == 1)
+a,b = string.find('a\0o a\0o a\0o', 'a\0o', 2)   -- starts in the midle
+assert(a == 5 and b == 7)
+a,b = string.find('a\0o a\0o a\0o', 'a\0o', 9)   -- starts in the midle
+assert(a == 9 and b == 11)
+a,b = string.find('a\0a\0a\0a\0\0ab', '\0ab', 2);  -- finds at the end
+assert(a == 9 and b == 11);
+a,b = string.find('a\0a\0a\0a\0\0ab', 'b')    -- last position
+assert(a == 11 and b == 11)
+assert(string.find('a\0a\0a\0a\0\0ab', 'b\0') == nil)   -- check ending
+assert(string.find('', '\0') == nil)
+assert(string.find('alo123alo', '12') == 4)
+assert(string.find('alo123alo', '^12') == nil)
+
+assert(string.match("aaab", ".*b") == "aaab")
+assert(string.match("aaa", ".*a") == "aaa")
+assert(string.match("b", ".*b") == "b")
+
+assert(string.match("aaab", ".+b") == "aaab")
+assert(string.match("aaa", ".+a") == "aaa")
+assert(not string.match("b", ".+b"))
+
+assert(string.match("aaab", ".?b") == "ab")
+assert(string.match("aaa", ".?a") == "aa")
+assert(string.match("b", ".?b") == "b")
+
+assert(f('aloALO', '%l*') == 'alo')
+assert(f('aLo_ALO', '%a*') == 'aLo')
+
+assert(f("  \n\r*&\n\r   xuxu  \n\n", "%g%g%g+") == "xuxu")
+
+assert(f('aaab', 'a*') == 'aaa');
+assert(f('aaa', '^.*$') == 'aaa');
+assert(f('aaa', 'b*') == '');
+assert(f('aaa', 'ab*a') == 'aa')
+assert(f('aba', 'ab*a') == 'aba')
+assert(f('aaab', 'a+') == 'aaa')
+assert(f('aaa', '^.+$') == 'aaa')
+assert(f('aaa', 'b+') == nil)
+assert(f('aaa', 'ab+a') == nil)
+assert(f('aba', 'ab+a') == 'aba')
+assert(f('a$a', '.$') == 'a')
+assert(f('a$a', '.%$') == 'a$')
+assert(f('a$a', '.$.') == 'a$a')
+assert(f('a$a', '$$') == nil)
+assert(f('a$b', 'a$') == nil)
+assert(f('a$a', '$') == '')
+assert(f('', 'b*') == '')
+assert(f('aaa', 'bb*') == nil)
+assert(f('aaab', 'a-') == '')
+assert(f('aaa', '^.-$') == 'aaa')
+assert(f('aabaaabaaabaaaba', 'b.*b') == 'baaabaaabaaab')
+assert(f('aabaaabaaabaaaba', 'b.-b') == 'baaab')
+assert(f('alo xo', '.o$') == 'xo')
+assert(f(' \n isto é assim', '%S%S*') == 'isto')
+assert(f(' \n isto é assim', '%S*$') == 'assim')
+assert(f(' \n isto é assim', '[a-z]*$') == 'assim')
+assert(f('um caracter ? extra', '[^%sa-z]') == '?')
+assert(f('', 'a?') == '')
+assert(f('á', 'á?') == 'á')
+assert(f('ábl', 'á?b?l?') == 'ábl')
+assert(f('  ábl', 'á?b?l?') == '')
+assert(f('aa', '^aa?a?a') == 'aa')
+assert(f(']]]áb', '[^]]') == 'á')
+assert(f("0alo alo", "%x*") == "0a")
+assert(f("alo alo", "%C+") == "alo alo")
+print('+')
+
+
+function f1(s, p)
+  p = string.gsub(p, "%%([0-9])", function (s)
+        return "%" .. (tonumber(s)+1)
+       end)
+  p = string.gsub(p, "^(^?)", "%1()", 1)
+  p = string.gsub(p, "($?)$", "()%1", 1)
+  local t = {string.match(s, p)}
+  return string.sub(s, t[1], t[#t] - 1)
+end
+
+assert(f1('alo alx 123 b\0o b\0o', '(..*) %1') == "b\0o b\0o")
+assert(f1('axz123= 4= 4 34', '(.+)=(.*)=%2 %1') == '3= 4= 4 3')
+assert(f1('=======', '^(=*)=%1$') == '=======')
+assert(string.match('==========', '^([=]*)=%1$') == nil)
+
+local function range (i, j)
+  if i <= j then
+    return i, range(i+1, j)
+  end
+end
+
+local abc = string.char(range(0, 255));
+
+assert(string.len(abc) == 256)
+
+function strset (p)
+  local res = {s=''}
+  string.gsub(abc, p, function (c) res.s = res.s .. c end)
+  return res.s
+end;
+
+assert(string.len(strset('[\200-\210]')) == 11)
+
+assert(strset('[a-z]') == "abcdefghijklmnopqrstuvwxyz")
+assert(strset('[a-z%d]') == strset('[%da-uu-z]'))
+assert(strset('[a-]') == "-a")
+assert(strset('[^%W]') == strset('[%w]'))
+assert(strset('[]%%]') == '%]')
+assert(strset('[a%-z]') == '-az')
+assert(strset('[%^%[%-a%]%-b]') == '-[]^ab')
+assert(strset('%Z') == strset('[\1-\255]'))
+assert(strset('.') == strset('[\1-\255%z]'))
+print('+');
+
+assert(string.match("alo xyzK", "(%w+)K") == "xyz")
+assert(string.match("254 K", "(%d*)K") == "")
+assert(string.match("alo ", "(%w*)$") == "")
+assert(string.match("alo ", "(%w+)$") == nil)
+assert(string.find("(álo)", "%(á") == 1)
+local a, b, c, d, e = string.match("âlo alo", "^(((.).).* (%w*))$")
+assert(a == 'âlo alo' and b == 'âl' and c == 'â' and d == 'alo' and e == nil)
+a, b, c, d  = string.match('0123456789', '(.+(.?)())')
+assert(a == '0123456789' and b == '' and c == 11 and d == nil)
+print('+')
+
+assert(string.gsub('ülo ülo', 'ü', 'x') == 'xlo xlo')
+assert(string.gsub('alo úlo  ', ' +$', '') == 'alo úlo')  -- trim
+assert(string.gsub('  alo alo  ', '^%s*(.-)%s*$', '%1') == 'alo alo')  -- double trim
+assert(string.gsub('alo  alo  \n 123\n ', '%s+', ' ') == 'alo alo 123 ')
+t = "abç d"
+a, b = string.gsub(t, '(.)', '%1@')
+assert('@'..a == string.gsub(t, '', '@') and b == 5)
+a, b = string.gsub('abçd', '(.)', '%0@', 2)
+assert(a == 'a@b@çd' and b == 2)
+assert(string.gsub('alo alo', '()[al]', '%1') == '12o 56o')
+assert(string.gsub("abc=xyz", "(%w*)(%p)(%w+)", "%3%2%1-%0") ==
+              "xyz=abc-abc=xyz")
+assert(string.gsub("abc", "%w", "%1%0") == "aabbcc")
+assert(string.gsub("abc", "%w+", "%0%1") == "abcabc")
+assert(string.gsub('áéí', '$', '\0óú') == 'áéí\0óú')
+assert(string.gsub('', '^', 'r') == 'r')
+assert(string.gsub('', '$', 'r') == 'r')
+print('+')
+
+assert(string.gsub("um (dois) tres (quatro)", "(%(%w+%))", string.upper) ==
+            "um (DOIS) tres (QUATRO)")
+
+do
+  local function setglobal (n,v) rawset(_G, n, v) end
+  string.gsub("a=roberto,roberto=a", "(%w+)=(%w%w*)", setglobal)
+  assert(_G.a=="roberto" and _G.roberto=="a")
+end
+
+function f(a,b) return string.gsub(a,'.',b) end
+assert(string.gsub("trocar tudo em |teste|b| é |beleza|al|", "|([^|]*)|([^|]*)|", f) ==
+            "trocar tudo em bbbbb é alalalalalal")
+
+local function dostring (s) return load(s, "")() or "" end
+assert(string.gsub("alo $a='x'$ novamente $return a$",
+                   "$([^$]*)%$",
+                   dostring) == "alo  novamente x")
+
+x = string.gsub("$x=string.gsub('alo', '.', string.upper)$ assim vai para $return x$",
+         "$([^$]*)%$", dostring)
+assert(x == ' assim vai para ALO')
+
+t = {}
+s = 'a alo jose  joao'
+r = string.gsub(s, '()(%w+)()', function (a,w,b)
+      assert(string.len(w) == b-a);
+      t[a] = b-a;
+    end)
+assert(s == r and t[1] == 1 and t[3] == 3 and t[7] == 4 and t[13] == 4)
+
+
+function isbalanced (s)
+  return string.find(string.gsub(s, "%b()", ""), "[()]") == nil
+end
+
+assert(isbalanced("(9 ((8))(\0) 7) \0\0 a b ()(c)() a"))
+assert(not isbalanced("(9 ((8) 7) a b (\0 c) a"))
+assert(string.gsub("alo 'oi' alo", "%b''", '"') == 'alo " alo')
+
+
+local t = {"apple", "orange", "lime"; n=0}
+assert(string.gsub("x and x and x", "x", function () t.n=t.n+1; return t[t.n] end)
+        == "apple and orange and lime")
+
+t = {n=0}
+string.gsub("first second word", "%w%w*", function (w) t.n=t.n+1; t[t.n] = w end)
+assert(t[1] == "first" and t[2] == "second" and t[3] == "word" and t.n == 3)
+
+t = {n=0}
+assert(string.gsub("first second word", "%w+",
+         function (w) t.n=t.n+1; t[t.n] = w end, 2) == "first second word")
+assert(t[1] == "first" and t[2] == "second" and t[3] == nil)
+
+checkerror("invalid replacement value %(a table%)",
+            string.gsub, "alo", ".", {a = {}})
+checkerror("invalid capture index %%2", string.gsub, "alo", ".", "%2")
+checkerror("invalid capture index %%0", string.gsub, "alo", "(%0)", "a")
+checkerror("invalid capture index %%1", string.gsub, "alo", "(%1)", "a")
+checkerror("invalid use of '%%'", string.gsub, "alo", ".", "%x")
+
+-- bug since 2.5 (C-stack overflow)
+do
+  local function f (size)
+    local s = string.rep("a", size)
+    local p = string.rep(".?", size)
+    return pcall(string.match, s, p)
+  end
+  local r, m = f(80)
+  assert(r and #m == 80)
+  r, m = f(200000)
+  assert(not r and string.find(m, "too complex"))
+end
+
+if not _soft then
+  -- big strings
+  local a = string.rep('a', 300000)
+  assert(string.find(a, '^a*.?$'))
+  assert(not string.find(a, '^a*.?b$'))
+  assert(string.find(a, '^a-.?$'))
+
+  -- bug in 5.1.2
+  a = string.rep('a', 10000) .. string.rep('b', 10000)
+  assert(not pcall(string.gsub, a, 'b'))
+end
+
+-- recursive nest of gsubs
+function rev (s)
+  return string.gsub(s, "(.)(.+)", function (c,s1) return rev(s1)..c end)
+end
+
+local x = "abcdef"
+assert(rev(rev(x)) == x)
+
+
+-- gsub with tables
+assert(string.gsub("alo alo", ".", {}) == "alo alo")
+assert(string.gsub("alo alo", "(.)", {a="AA", l=""}) == "AAo AAo")
+assert(string.gsub("alo alo", "(.).", {a="AA", l="K"}) == "AAo AAo")
+assert(string.gsub("alo alo", "((.)(.?))", {al="AA", o=false}) == "AAo AAo")
+
+assert(string.gsub("alo alo", "().", {'x','yy','zzz'}) == "xyyzzz alo")
+
+t = {}; setmetatable(t, {__index = function (t,s) return string.upper(s) end})
+assert(string.gsub("a alo b hi", "%w%w+", t) == "a ALO b HI")
+
+
+-- tests for gmatch
+local a = 0
+for i in string.gmatch('abcde', '()') do assert(i == a+1); a=i end
+assert(a==6)
+
+t = {n=0}
+for w in string.gmatch("first second word", "%w+") do
+      t.n=t.n+1; t[t.n] = w
+end
+assert(t[1] == "first" and t[2] == "second" and t[3] == "word")
+
+t = {3, 6, 9}
+for i in string.gmatch ("xuxx uu ppar r", "()(.)%2") do
+  assert(i == table.remove(t, 1))
+end
+assert(#t == 0)
+
+t = {}
+for i,j in string.gmatch("13 14 10 = 11, 15= 16, 22=23", "(%d+)%s*=%s*(%d+)") do
+  t[tonumber(i)] = tonumber(j)
+end
+a = 0
+for k,v in pairs(t) do assert(k+1 == v+0); a=a+1 end
+assert(a == 3)
+
+
+-- tests for `%f' (`frontiers')
+
+assert(string.gsub("aaa aa a aaa a", "%f[%w]a", "x") == "xaa xa x xaa x")
+assert(string.gsub("[[]] [][] [[[[", "%f[[].", "x") == "x[]] x]x] x[[[")
+assert(string.gsub("01abc45de3", "%f[%d]", ".") == ".01abc.45de.3")
+assert(string.gsub("01abc45 de3x", "%f[%D]%w", ".") == "01.bc45 de3.")
+assert(string.gsub("function", "%f[\1-\255]%w", ".") == ".unction")
+assert(string.gsub("function", "%f[^\1-\255]", ".") == "function.")
+
+assert(string.find("a", "%f[a]") == 1)
+assert(string.find("a", "%f[^%z]") == 1)
+assert(string.find("a", "%f[^%l]") == 2)
+assert(string.find("aba", "%f[a%z]") == 3)
+assert(string.find("aba", "%f[%z]") == 4)
+assert(not string.find("aba", "%f[%l%z]"))
+assert(not string.find("aba", "%f[^%l%z]"))
+
+local i, e = string.find(" alo aalo allo", "%f[%S].-%f[%s].-%f[%S]")
+assert(i == 2 and e == 5)
+local k = string.match(" alo aalo allo", "%f[%S](.-%f[%s].-%f[%S])")
+assert(k == 'alo ')
+
+local a = {1, 5, 9, 14, 17,}
+for k in string.gmatch("alo alo th02 is 1hat", "()%f[%w%d]") do
+  assert(table.remove(a, 1) == k)
+end
+assert(#a == 0)
+
+
+-- malformed patterns
+local function malform (p, m)
+  m = m or "malformed"
+  local r, msg = pcall(string.find, "a", p)
+  assert(not r and string.find(msg, m))
+end
+
+malform("(.", "unfinished capture")
+malform(".)", "invalid pattern capture")
+malform("[a")
+malform("[]")
+malform("[^]")
+malform("[a%]")
+malform("[a%")
+malform("%b")
+malform("%ba")
+malform("%")
+malform("%f", "missing")
+
+-- \0 in patterns
+assert(string.match("ab\0\1\2c", "[\0-\2]+") == "\0\1\2")
+assert(string.match("ab\0\1\2c", "[\0-\0]+") == "\0")
+assert(string.find("b$a", "$\0?") == 2)
+assert(string.find("abc\0efg", "%\0") == 4)
+assert(string.match("abc\0efg\0\1e\1g", "%b\0\1") == "\0efg\0\1e\1")
+assert(string.match("abc\0\0\0", "%\0+") == "\0\0\0")
+assert(string.match("abc\0\0\0", "%\0%\0?") == "\0\0")
+
+-- magic char after \0
+assert(string.find("abc\0\0","\0.") == 4)
+assert(string.find("abcx\0\0abc\0abc","x\0\0abc\0a.") == 4)
+
+print('OK')
+
diff --git a/lua-5.3.1-tests/sort.lua b/lua-5.3.1-tests/sort.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/sort.lua
@@ -0,0 +1,283 @@
+-- $Id: sort.lua,v 1.32 2015/03/04 13:09:38 roberto Exp $
+
+print "testing (parts of) table library"
+
+print "testing unpack"
+
+local unpack = table.unpack
+
+local maxI = math.maxinteger
+local minI = math.mininteger
+
+
+local function checkerror (msg, f, ...)
+  local s, err = pcall(f, ...)
+  assert(not s and string.find(err, msg))
+end
+
+
+checkerror("wrong number of arguments", table.insert, {}, 2, 3, 4)
+
+local x,y,z,a,n
+a = {}; lim = _soft and 200 or 2000
+for i=1, lim do a[i]=i end
+assert(select(lim, unpack(a)) == lim and select('#', unpack(a)) == lim)
+x = unpack(a)
+assert(x == 1)
+x = {unpack(a)}
+assert(#x == lim and x[1] == 1 and x[lim] == lim)
+x = {unpack(a, lim-2)}
+assert(#x == 3 and x[1] == lim-2 and x[3] == lim)
+x = {unpack(a, 10, 6)}
+assert(next(x) == nil)   -- no elements
+x = {unpack(a, 11, 10)}
+assert(next(x) == nil)   -- no elements
+x,y = unpack(a, 10, 10)
+assert(x == 10 and y == nil)
+x,y,z = unpack(a, 10, 11)
+assert(x == 10 and y == 11 and z == nil)
+a,x = unpack{1}
+assert(a==1 and x==nil)
+a,x = unpack({1,2}, 1, 1)
+assert(a==1 and x==nil)
+
+do
+  local maxi = (1 << 31) - 1          -- maximum value for an int (usually)
+  local mini = -(1 << 31)             -- minimum value for an int (usually)
+  checkerror("too many results", unpack, {}, 0, maxi)
+  checkerror("too many results", unpack, {}, 1, maxi)
+  checkerror("too many results", unpack, {}, 0, maxI)
+  checkerror("too many results", unpack, {}, 1, maxI)
+  checkerror("too many results", unpack, {}, mini, maxi)
+  checkerror("too many results", unpack, {}, -maxi, maxi)
+  checkerror("too many results", unpack, {}, minI, maxI)
+  unpack({}, maxi, 0)
+  unpack({}, maxi, 1)
+  unpack({}, maxI, minI)
+  pcall(unpack, {}, 1, maxi + 1)
+  local a, b = unpack({[maxi] = 20}, maxi, maxi)
+  assert(a == 20 and b == nil)
+  a, b = unpack({[maxi] = 20}, maxi - 1, maxi)
+  assert(a == nil and b == 20)
+  local t = {[maxI - 1] = 12, [maxI] = 23}
+  a, b = unpack(t, maxI - 1, maxI); assert(a == 12 and b == 23)
+  a, b = unpack(t, maxI, maxI); assert(a == 23 and b == nil)
+  a, b = unpack(t, maxI, maxI - 1); assert(a == nil and b == nil)
+  t = {[minI] = 12.3, [minI + 1] = 23.5}
+  a, b = unpack(t, minI, minI + 1); assert(a == 12.3 and b == 23.5)
+  a, b = unpack(t, minI, minI); assert(a == 12.3 and b == nil)
+  a, b = unpack(t, minI + 1, minI); assert(a == nil and b == nil)
+end
+
+do   -- length is not an integer
+  local t = setmetatable({}, {__len = function () return 'abc' end})
+  assert(#t == 'abc')
+  checkerror("object length is not an integer", table.insert, t, 1)
+end
+
+print "testing pack"
+
+a = table.pack()
+assert(a[1] == nil and a.n == 0) 
+
+a = table.pack(table)
+assert(a[1] == table and a.n == 1)
+
+a = table.pack(nil, nil, nil, nil)
+assert(a[1] == nil and a.n == 4)
+
+
+-- testing move
+do
+  local function eqT (a, b)
+    for k, v in pairs(a) do assert(b[k] == v) end 
+    for k, v in pairs(b) do assert(a[k] == v) end 
+  end
+
+  local a = table.move({10,20,30}, 1, 3, 2)  -- move forward
+  eqT(a, {10,10,20,30})
+
+  a = table.move({10,20,30}, 2, 3, 1)   -- move backward
+  eqT(a, {20,30,30})
+
+  a = table.move({10,20,30}, 1, 3, 1, {})   -- move
+  eqT(a, {10,20,30})
+
+  a = table.move({10,20,30}, 1, 0, 3, {})   -- do not move
+  eqT(a, {})
+
+  a = table.move({10,20,30}, 1, 10, 1)   -- move to the same place
+  eqT(a, {10,20,30})
+
+  a = table.move({[maxI - 2] = 1, [maxI - 1] = 2, [maxI] = 3},
+                 maxI - 2, maxI, -10, {})
+  eqT(a, {[-10] = 1, [-9] = 2, [-8] = 3})
+
+  a = table.move({[minI] = 1, [minI + 1] = 2, [minI + 2] = 3},
+                 minI, minI + 2, -10, {})
+  eqT(a, {[-10] = 1, [-9] = 2, [-8] = 3})
+
+  a = table.move({45}, 1, 1, maxI)
+  eqT(a, {45, [maxI] = 45})
+
+  a = table.move({[maxI] = 100}, maxI, maxI, minI)
+  eqT(a, {[minI] = 100, [maxI] = 100})
+
+  a = table.move({[minI] = 100}, minI, minI, maxI)
+  eqT(a, {[minI] = 100, [maxI] = 100})
+
+  a = setmetatable({}, {
+        __index = function (_,k) return k * 10 end,
+        __newindex = error})
+  local b = table.move(a, 1, 10, 3, {})
+  eqT(a, {})
+  eqT(b, {nil,nil,10,20,30,40,50,60,70,80,90,100})
+
+  b = setmetatable({""}, {
+        __index = error,
+        __newindex = function (t,k,v)
+          t[1] = string.format("%s(%d,%d)", t[1], k, v)
+      end})
+  table.move(a, 10, 13, 3, b)
+  assert(b[1] == "(3,100)(4,110)(5,120)(6,130)")
+  local stat, msg = pcall(table.move, b, 10, 13, 3, b)
+  assert(not stat and msg == b)
+end
+
+do
+  -- for very long moves, just check initial accesses and interrupt
+  -- move with an error
+  local function checkmove (f, e, t, x, y)
+    local pos1, pos2
+    local a = setmetatable({}, {
+                __index = function (_,k) pos1 = k end,
+                __newindex = function (_,k) pos2 = k; error() end, })
+    local st, msg = pcall(table.move, a, f, e, t)
+    assert(not st and not msg and pos1 == x and pos2 == y)
+  end
+  checkmove(1, maxI, 0, 1, 0)
+  checkmove(0, maxI - 1, 1, maxI - 1, maxI)
+  checkmove(minI, -2, 0, -2, maxI - 1)
+  checkmove(minI + 1, -1, 1, -1, maxI)
+end
+
+checkerror("too many", table.move, {}, 0, maxI, 1)
+checkerror("too many", table.move, {}, -1, maxI - 1, 1)
+checkerror("too many", table.move, {}, minI, -1, 1)
+checkerror("too many", table.move, {}, minI, maxI, 1)
+checkerror("wrap around", table.move, {}, 1, maxI, 2)
+checkerror("wrap around", table.move, {}, 1, 2, maxI)
+checkerror("wrap around", table.move, {}, minI, -2, 2)
+
+
+print"testing sort"
+
+
+-- test checks for invalid order functions
+local function check (t)
+  local function f(a, b) assert(a and b); return true end
+  checkerror("invalid order function", table.sort, t, f)
+end
+
+check{1,2,3,4}
+check{1,2,3,4,5}
+check{1,2,3,4,5,6}
+
+
+function check (a, f)
+  f = f or function (x,y) return x<y end;
+  for n = #a, 2, -1 do
+    assert(not f(a[n], a[n-1]))
+  end
+end
+
+a = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
+     "Oct", "Nov", "Dec"}
+
+table.sort(a)
+check(a)
+
+function perm (s, n)
+  n = n or #s
+  if n == 1 then
+    local t = {unpack(s)}
+    table.sort(t)
+    check(t)
+  else
+    for i = 1, n do
+      s[i], s[n] = s[n], s[i]
+      perm(s, n - 1)
+      s[i], s[n] = s[n], s[i]
+    end
+  end
+end
+
+perm{}
+perm{1}
+perm{1,2}
+perm{1,2,3}
+perm{1,2,3,4}
+perm{2,2,3,4}
+perm{1,2,3,4,5}
+perm{1,2,3,3,5}
+perm{1,2,3,4,5,6}
+perm{2,2,3,3,5,6}
+
+limit = 30000
+if _soft then limit = 5000 end
+
+a = {}
+for i=1,limit do
+  a[i] = math.random()
+end
+
+local x = os.clock()
+table.sort(a)
+print(string.format("Sorting %d elements in %.2f sec.", limit, os.clock()-x))
+check(a)
+
+x = os.clock()
+table.sort(a)
+print(string.format("Re-sorting %d elements in %.2f sec.", limit, os.clock()-x))
+check(a)
+
+a = {}
+for i=1,limit do
+  a[i] = math.random()
+end
+
+x = os.clock(); i=0
+table.sort(a, function(x,y) i=i+1; return y<x end)
+print(string.format("Invert-sorting other %d elements in %.2f sec., with %i comparisons",
+      limit, os.clock()-x, i))
+check(a, function(x,y) return y<x end)
+
+
+table.sort{}  -- empty array
+
+for i=1,limit do a[i] = false end
+x = os.clock();
+table.sort(a, function(x,y) return nil end)
+print(string.format("Sorting %d equal elements in %.2f sec.", limit, os.clock()-x))
+check(a, function(x,y) return nil end)
+for i,v in pairs(a) do assert(not v or i=='n' and v==limit) end
+
+A = {"álo", "\0first :-)", "alo", "then this one", "45", "and a new"}
+table.sort(A)
+check(A)
+
+table.sort(A, function (x, y)
+          load(string.format("A[%q] = ''", x), "")()
+          collectgarbage()
+          return x<y
+        end)
+
+
+tt = {__lt = function (a,b) return a.val < b.val end}
+a = {}
+for i=1,10 do  a[i] = {val=math.random(100)}; setmetatable(a[i], tt); end
+table.sort(a)
+check(a, tt.__lt)
+check(a)
+
+print"OK"
diff --git a/lua-5.3.1-tests/strings.lua b/lua-5.3.1-tests/strings.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/strings.lua
@@ -0,0 +1,339 @@
+-- $Id: strings.lua,v 1.79 2015/02/05 17:52:25 roberto Exp $
+
+print('testing strings and string library')
+
+local maxi, mini = math.maxinteger, math.mininteger
+
+
+local function checkerror (msg, f, ...)
+  local s, err = pcall(f, ...)
+  assert(not s and string.find(err, msg))
+end
+
+
+-- testing string comparisons
+assert('alo' < 'alo1')
+assert('' < 'a')
+assert('alo\0alo' < 'alo\0b')
+assert('alo\0alo\0\0' > 'alo\0alo\0')
+assert('alo' < 'alo\0')
+assert('alo\0' > 'alo')
+assert('\0' < '\1')
+assert('\0\0' < '\0\1')
+assert('\1\0a\0a' <= '\1\0a\0a')
+assert(not ('\1\0a\0b' <= '\1\0a\0a'))
+assert('\0\0\0' < '\0\0\0\0')
+assert(not('\0\0\0\0' < '\0\0\0'))
+assert('\0\0\0' <= '\0\0\0\0')
+assert(not('\0\0\0\0' <= '\0\0\0'))
+assert('\0\0\0' <= '\0\0\0')
+assert('\0\0\0' >= '\0\0\0')
+assert(not ('\0\0b' < '\0\0a\0'))
+
+-- testing string.sub
+assert(string.sub("123456789",2,4) == "234")
+assert(string.sub("123456789",7) == "789")
+assert(string.sub("123456789",7,6) == "")
+assert(string.sub("123456789",7,7) == "7")
+assert(string.sub("123456789",0,0) == "")
+assert(string.sub("123456789",-10,10) == "123456789")
+assert(string.sub("123456789",1,9) == "123456789")
+assert(string.sub("123456789",-10,-20) == "")
+assert(string.sub("123456789",-1) == "9")
+assert(string.sub("123456789",-4) == "6789")
+assert(string.sub("123456789",-6, -4) == "456")
+assert(string.sub("123456789", mini, -4) == "123456")
+assert(string.sub("123456789", mini, maxi) == "123456789")
+assert(string.sub("123456789", mini, mini) == "")
+assert(string.sub("\000123456789",3,5) == "234")
+assert(("\000123456789"):sub(8) == "789")
+
+-- testing string.find
+assert(string.find("123456789", "345") == 3)
+a,b = string.find("123456789", "345")
+assert(string.sub("123456789", a, b) == "345")
+assert(string.find("1234567890123456789", "345", 3) == 3)
+assert(string.find("1234567890123456789", "345", 4) == 13)
+assert(string.find("1234567890123456789", "346", 4) == nil)
+assert(string.find("1234567890123456789", ".45", -9) == 13)
+assert(string.find("abcdefg", "\0", 5, 1) == nil)
+assert(string.find("", "") == 1)
+assert(string.find("", "", 1) == 1)
+assert(not string.find("", "", 2))
+assert(string.find('', 'aaa', 1) == nil)
+assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
+
+assert(string.len("") == 0)
+assert(string.len("\0\0\0") == 3)
+assert(string.len("1234567890") == 10)
+
+assert(#"" == 0)
+assert(#"\0\0\0" == 3)
+assert(#"1234567890" == 10)
+
+-- testing string.byte/string.char
+assert(string.byte("a") == 97)
+assert(string.byte("\xe4") > 127)
+assert(string.byte(string.char(255)) == 255)
+assert(string.byte(string.char(0)) == 0)
+assert(string.byte("\0") == 0)
+assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
+assert(string.byte("ba", 2) == 97)
+assert(string.byte("\n\n", 2, -1) == 10)
+assert(string.byte("\n\n", 2, 2) == 10)
+assert(string.byte("") == nil)
+assert(string.byte("hi", -3) == nil)
+assert(string.byte("hi", 3) == nil)
+assert(string.byte("hi", 9, 10) == nil)
+assert(string.byte("hi", 2, 1) == nil)
+assert(string.char() == "")
+assert(string.char(0, 255, 0) == "\0\255\0")
+assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
+assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
+assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
+assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
+
+assert(string.upper("ab\0c") == "AB\0C")
+assert(string.lower("\0ABCc%$") == "\0abcc%$")
+assert(string.rep('teste', 0) == '')
+assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
+assert(string.rep('', 10) == '')
+
+if string.packsize("i") == 4 then
+  -- result length would be 2^31 (int overflow)
+  checkerror("too large", string.rep, 'aa', (1 << 30))
+  checkerror("too large", string.rep, 'a', (1 << 30), ',')
+end
+
+-- repetitions with separator
+assert(string.rep('teste', 0, 'xuxu') == '')
+assert(string.rep('teste', 1, 'xuxu') == 'teste')
+assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
+assert(string.rep('', 10, '.') == string.rep('.', 9))
+assert(not pcall(string.rep, "aa", maxi // 2))
+assert(not pcall(string.rep, "", maxi // 2, "aa"))
+
+assert(string.reverse"" == "")
+assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
+assert(string.reverse"\0001234" == "4321\0")
+
+for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
+
+assert(type(tostring(nil)) == 'string')
+assert(type(tostring(12)) == 'string')
+assert(string.find(tostring{}, 'table:'))
+assert(string.find(tostring(print), 'function:'))
+assert(#tostring('\0') == 1)
+assert(tostring(true) == "true")
+assert(tostring(false) == "false")
+assert(tostring(-1203) == "-1203")
+assert(tostring(1203.125) == "1203.125")
+assert(tostring(-0.5) == "-0.5")
+assert(tostring(-32767) == "-32767")
+if 2147483647 > 0 then   -- no overflow? (32 bits)
+  assert(tostring(-2147483647) == "-2147483647")
+end
+if 4611686018427387904 > 0 then   -- no overflow? (64 bits)
+  assert(tostring(4611686018427387904) == "4611686018427387904")
+  assert(tostring(-4611686018427387904) == "-4611686018427387904")
+end
+
+if tostring(0.0) == "0.0" then   -- "standard" coercion float->string
+  assert('' .. 12 == '12' and 12.0 .. '' == '12.0')
+  assert(tostring(-1203 + 0.0) == "-1203.0")
+else   -- compatible coercion
+  assert(tostring(0.0) == "0")
+  assert('' .. 12 == '12' and 12.0 .. '' == '12')
+  assert(tostring(-1203 + 0.0) == "-1203")
+end
+
+
+x = '"ílo"\n\\'
+assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
+assert(string.format('%q', "\0") == [["\0"]])
+assert(load(string.format('return %q', x))() == x)
+x = "\0\1\0023\5\0009"
+assert(load(string.format('return %q', x))() == x)
+assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
+              "\0\xe4\0b8c\0")
+assert(string.format('') == "")
+assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
+       string.format("%c%c%c%c", 34, 48, 90, 100))
+assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
+assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
+assert(tonumber(string.format("%f", 10.3)) == 10.3)
+x = string.format('"%-50s"', 'a')
+assert(#x == 52)
+assert(string.sub(x, 1, 4) == '"a  ')
+
+assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
+                     "-"..string.rep("%", 20)..".20s")
+assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
+       string.format("%q", "-"..string.rep("%", 2000)..".20s"))
+
+-- format x tostring
+assert(string.format("%s %s", nil, true) == "nil true")
+assert(string.format("%s %.4s", false, true) == "false true")
+assert(string.format("%.3s %.3s", false, true) == "fal tru")
+local m = setmetatable({}, {__tostring = function () return "hello" end})
+assert(string.format("%s %.10s", m, m) == "hello hello")
+
+
+assert(string.format("%x", 0.0) == "0")
+assert(string.format("%02x", 0.0) == "00")
+assert(string.format("%08X", 4294967295) == "FFFFFFFF")
+assert(string.format("%+08d", 31501) == "+0031501")
+assert(string.format("%+08d", -30927) == "-0030927")
+
+
+do    -- longest number that can be formatted
+  local i = 1
+  local j = 10000
+  while i + 1 < j do   -- binary search for maximum finite float
+    local m = (i + j) // 2
+    if 10^m < math.huge then i = m else j = m end
+  end
+  assert(10^i < math.huge and 10^j == math.huge)
+  assert(string.len(string.format('%.99f', -(10^i))) > i)
+end
+
+
+-- testing large numbers for format
+do   -- assume at least 32 bits
+  local max, min = 0x7fffffff, -0x80000000    -- "large" for 32 bits
+  assert(string.sub(string.format("%8x", -1), -8) == "ffffffff")
+  assert(string.format("%x", max) == "7fffffff")
+  assert(string.sub(string.format("%x", min), -8) == "80000000")
+  assert(string.format("%d", max) ==  "2147483647")
+  assert(string.format("%d", min) == "-2147483648")
+  assert(string.format("%u", 0xffffffff) == "4294967295")
+  assert(string.format("%o", 0xABCD) == "125715")
+
+  max, min = 0x7fffffffffffffff, -0x8000000000000000
+  if max > 2.0^53 then  -- only for 64 bits
+    assert(string.format("%x", (2^52 | 0) - 1) == "fffffffffffff")
+    assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
+    assert(string.format("%d", 2^53) == "9007199254740992")
+    assert(string.format("%i", -2^53) == "-9007199254740992")
+    assert(string.format("%x", max) == "7fffffffffffffff")
+    assert(string.format("%x", min) == "8000000000000000")
+    assert(string.format("%d", max) ==  "9223372036854775807")
+    assert(string.format("%d", min) == "-9223372036854775808")
+    assert(string.format("%u", ~(-1 << 64)) == "18446744073709551615")
+    assert(tostring(1234567890123) == '1234567890123')
+  end
+end
+
+
+do print("testing 'format %a %A'")
+  local function matchhexa (n)
+    local s = string.format("%a", n)
+    -- result matches ISO C requirements
+    assert(string.find(s, "^%-?0x[1-9a-f]%.?[0-9a-f]*p[-+]?%d+$"))
+    assert(tonumber(s) == n)  -- and has full precision
+    s = string.format("%A", n)
+    assert(string.find(s, "^%-?0X[1-9A-F]%.?[0-9A-F]*P[-+]?%d+$"))
+    assert(tonumber(s) == n)
+  end
+  for _, n in ipairs{0.1, -0.1, 1/3, -1/3, 1e30, -1e30,
+                     -45/247, 1, -1, 2, -2, 3e-20, -3e-20} do
+    matchhexa(n)
+  end
+
+  assert(string.find(string.format("%A", 0.0), "^0X0%.?0?P%+?0$"))
+  assert(string.find(string.format("%a", -0.0), "^%-0x0%.?0?p%+?0$"))
+
+  if not _port then   -- test inf, -inf, NaN, and -0.0
+    assert(string.find(string.format("%a", 1/0), "^inf"))
+    assert(string.find(string.format("%A", -1/0), "^%-INF"))
+    assert(string.find(string.format("%a", 0/0), "^%-?nan"))
+    assert(string.find(string.format("%a", -0.0), "^%-0x0"))
+  end
+  
+  if not pcall(string.format, "%.3a", 0) then
+    (Message or print)("\n >>> modifiers for format '%a' not available <<<\n")
+  else
+    assert(string.find(string.format("%+.2A", 12), "^%+0X%x%.%x0P%+?%d$"))
+    assert(string.find(string.format("%.4A", -12), "^%-0X%x%.%x000P%+?%d$"))
+  end
+end
+
+
+-- errors in format
+
+local function check (fmt, msg)
+  checkerror(msg, string.format, fmt, 10)
+end
+
+local aux = string.rep('0', 600)
+check("%100.3d", "too long")
+check("%1"..aux..".3d", "too long")
+check("%1.100d", "too long")
+check("%10.1"..aux.."004d", "too long")
+check("%t", "invalid option")
+check("%"..aux.."d", "repeated flags")
+check("%d %d", "no value")
+
+
+assert(load("return 1\n--comment without ending EOL")() == 1)
+
+
+assert(table.concat{} == "")
+assert(table.concat({}, 'x') == "")
+assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
+local a = {}; for i=1,300 do a[i] = "xuxu" end
+assert(table.concat(a, "123").."123" == string.rep("xuxu123", 300))
+assert(table.concat(a, "b", 20, 20) == "xuxu")
+assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
+assert(table.concat(a, "x", 22, 21) == "")
+assert(table.concat(a, "3", 299) == "xuxu3xuxu")
+assert(table.concat({}, "x", maxi, maxi - 1) == "")
+assert(table.concat({}, "x", mini + 1, mini) == "")
+assert(table.concat({}, "x", maxi, mini) == "")
+assert(table.concat({[maxi] = "alo"}, "x", maxi, maxi) == "alo")
+assert(table.concat({[maxi] = "alo", [maxi - 1] = "y"}, "-", maxi - 1, maxi)
+       == "y-alo")
+
+assert(not pcall(table.concat, {"a", "b", {}}))
+
+a = {"a","b","c"}
+assert(table.concat(a, ",", 1, 0) == "")
+assert(table.concat(a, ",", 1, 1) == "a")
+assert(table.concat(a, ",", 1, 2) == "a,b")
+assert(table.concat(a, ",", 2) == "b,c")
+assert(table.concat(a, ",", 3) == "c")
+assert(table.concat(a, ",", 4) == "")
+
+if not _port then
+
+  local locales = { "ptb", "ISO-8859-1", "pt_BR" }
+  local function trylocale (w)
+    for i = 1, #locales do
+      if os.setlocale(locales[i], w) then return true end
+    end
+    return false
+  end
+
+  if not trylocale("collate")  then
+    print("locale not supported")
+  else
+    assert("alo" < "álo" and "álo" < "amo")
+  end
+
+  if not trylocale("ctype") then
+    print("locale not supported")
+  else
+    assert(string.gsub("áéíóú", "%a", "x") == "xxxxx")
+    assert(string.gsub("áÁéÉ", "%l", "x") == "xÁxÉ")
+    assert(string.gsub("áÁéÉ", "%u", "x") == "áxéx")
+    assert(string.upper"áÁé{xuxu}ção" == "ÁÁÉ{XUXU}ÇÃO")
+  end
+
+  os.setlocale("C")
+  assert(os.setlocale() == 'C')
+  assert(os.setlocale(nil, "numeric") == 'C')
+
+end
+
+print('OK')
+
diff --git a/lua-5.3.1-tests/tpack.lua b/lua-5.3.1-tests/tpack.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/tpack.lua
@@ -0,0 +1,317 @@
+-- $Id: tpack.lua,v 1.10 2014/12/26 17:20:53 roberto Exp $
+
+local pack = string.pack
+local packsize = string.packsize
+local unpack = string.unpack
+
+print "testing pack/unpack"
+
+-- maximum size for integers
+local NB = 16
+
+local sizeshort = packsize("h")
+local sizeint = packsize("i")
+local sizelong = packsize("l")
+local sizesize_t = packsize("T")
+local sizeLI = packsize("j")
+local sizefloat = packsize("f")
+local sizedouble = packsize("d")
+local sizenumber = packsize("n")
+local little = (pack("i2", 1) == "\1\0")
+local align = packsize("!xXi16")
+
+assert(1 <= sizeshort and sizeshort <= sizeint and sizeint <= sizelong and
+       sizefloat <= sizedouble)
+
+print("platform:")
+print(string.format(
+  "\tshort %d, int %d, long %d, size_t %d, float %d, double %d,\n\z
+   \tlua Integer %d, lua Number %d",
+   sizeshort, sizeint, sizelong, sizesize_t, sizefloat, sizedouble,
+   sizeLI, sizenumber))
+print("\t" .. (little and "little" or "big") .. " endian")
+print("\talignment: " .. align)
+
+
+-- check errors in arguments
+function checkerror (msg, f, ...)
+  local status, err = pcall(f, ...)
+  -- print(status, err, msg)
+  assert(not status and string.find(err, msg))
+end
+
+-- minimum behavior for integer formats
+assert(unpack("B", pack("B", 0xff)) == 0xff)
+assert(unpack("b", pack("b", 0x7f)) == 0x7f)
+assert(unpack("b", pack("b", -0x80)) == -0x80)
+
+assert(unpack("H", pack("H", 0xffff)) == 0xffff)
+assert(unpack("h", pack("h", 0x7fff)) == 0x7fff)
+assert(unpack("h", pack("h", -0x8000)) == -0x8000)
+
+assert(unpack("L", pack("L", 0xffffffff)) == 0xffffffff)
+assert(unpack("l", pack("l", 0x7fffffff)) == 0x7fffffff)
+assert(unpack("l", pack("l", -0x80000000)) == -0x80000000)
+
+
+for i = 1, NB do
+  -- small numbers with signal extension ("\xFF...")
+  local s = string.rep("\xff", i)
+  assert(pack("i" .. i, -1) == s)
+  assert(packsize("i" .. i) == #s)
+  assert(unpack("i" .. i, s) == -1)
+
+  -- small unsigned number ("\0...\xAA")
+  s = "\xAA" .. string.rep("\0", i - 1)
+  assert(pack("<I" .. i, 0xAA) == s)
+  assert(unpack("<I" .. i, s) == 0xAA)
+  assert(pack(">I" .. i, 0xAA) == s:reverse())
+  assert(unpack(">I" .. i, s:reverse()) == 0xAA)
+end
+
+do
+  local lnum = 0x13121110090807060504030201
+  local s = pack("<j", lnum)
+  assert(unpack("<j", s) == lnum)
+  assert(unpack("<i" .. sizeLI + 1, s .. "\0") == lnum)
+  assert(unpack("<i" .. sizeLI + 1, s .. "\0") == lnum)
+
+  for i = sizeLI + 1, NB do
+    local s = pack("<j", -lnum)
+    assert(unpack("<j", s) == -lnum)
+    -- strings with (correct) extra bytes
+    assert(unpack("<i" .. i, s .. ("\xFF"):rep(i - sizeLI)) == -lnum)
+    assert(unpack(">i" .. i, ("\xFF"):rep(i - sizeLI) .. s:reverse()) == -lnum)
+    assert(unpack("<I" .. i, s .. ("\0"):rep(i - sizeLI)) == -lnum)
+
+    -- overflows
+    checkerror("does not fit", unpack, "<I" .. i, ("\x00"):rep(i - 1) .. "\1")
+    checkerror("does not fit", unpack, ">i" .. i, "\1" .. ("\x00"):rep(i - 1))
+  end
+end
+
+for i = 1, sizeLI do
+  local lstr = "\1\2\3\4\5\6\7\8\9\10\11\12\13"
+  local lnum = 0x13121110090807060504030201
+  local n = lnum & (~(-1 << (i * 8)))
+  local s = string.sub(lstr, 1, i)
+  assert(pack("<i" .. i, n) == s)
+  assert(pack(">i" .. i, n) == s:reverse())
+  assert(unpack(">i" .. i, s:reverse()) == n)
+end
+
+-- sign extension
+do
+  local u = 0xf0
+  for i = 1, sizeLI - 1 do
+    assert(unpack("<i"..i, "\xf0"..("\xff"):rep(i - 1)) == -16)
+    assert(unpack(">I"..i, "\xf0"..("\xff"):rep(i - 1)) == u)
+    u = u * 256 + 0xff
+  end
+end
+
+-- mixed endianness
+do
+  assert(pack(">i2 <i2", 10, 20) == "\0\10\20\0")
+  local a, b = unpack("<i2 >i2", "\10\0\0\20")
+  assert(a == 10 and b == 20)
+  assert(pack("=i4", 2001) == pack("i4", 2001))
+end
+
+print("testing invalid formats")
+
+checkerror("out of limits", pack, "i0", 0)
+checkerror("out of limits", pack, "i" .. NB + 1, 0)
+checkerror("out of limits", pack, "!" .. NB + 1, 0)
+checkerror("%(17%) out of limits %[1,16%]", pack, "Xi" .. NB + 1)
+checkerror("invalid format option 'r'", pack, "i3r", 0)
+checkerror("16%-byte integer", unpack, "i16", string.rep('\3', 16))
+checkerror("not power of 2", pack, "!4i3", 0);
+checkerror("missing size", pack, "c", "")
+checkerror("variable%-length format", packsize, "s")
+checkerror("variable%-length format", packsize, "z")
+
+-- overflow in option size  (error will be in digit after limit)
+checkerror("invalid format", packsize, "c1" .. string.rep("0", 40))
+
+if packsize("i") == 4 then
+  -- result would be 2^31  (2^3 repetitions of 2^28 strings)
+  local s = string.rep("c268435456", 2^3)
+  checkerror("too large", packsize, s)
+  -- one less is OK
+  s = string.rep("c268435456", 2^3 - 1) .. "c268435455"
+  assert(packsize(s) == 0x7fffffff)
+end
+
+-- overflow in packing
+for i = 1, sizeLI - 1 do
+  local umax = (1 << (i * 8)) - 1
+  local max = umax >> 1
+  local min = ~max
+  checkerror("overflow", pack, "<I" .. i, -1)
+  checkerror("overflow", pack, "<I" .. i, min)
+  checkerror("overflow", pack, ">I" .. i, umax + 1)
+
+  checkerror("overflow", pack, ">i" .. i, umax)
+  checkerror("overflow", pack, ">i" .. i, max + 1)
+  checkerror("overflow", pack, "<i" .. i, min - 1)
+
+  assert(unpack(">i" .. i, pack(">i" .. i, max)) == max)
+  assert(unpack("<i" .. i, pack("<i" .. i, min)) == min)
+  assert(unpack(">I" .. i, pack(">I" .. i, umax)) == umax)
+end
+
+-- Lua integer size
+assert(unpack(">j", pack(">j", math.maxinteger)) == math.maxinteger)
+assert(unpack("<j", pack("<j", math.mininteger)) == math.mininteger)
+assert(unpack("<J", pack("<j", -1)) == -1)   -- maximum unsigned integer
+
+if little then
+  assert(pack("f", 24) == pack("<f", 24))
+else
+  assert(pack("f", 24) == pack(">f", 24))
+end
+
+print "testing pack/unpack of floating-point numbers" 
+
+for _, n in ipairs{0, -1.1, 1.9, 1/0, -1/0, 1e20, -1e20, 0.1, 2000.7} do
+    assert(unpack("n", pack("n", n)) == n)
+    assert(unpack("<n", pack("<n", n)) == n)
+    assert(unpack(">n", pack(">n", n)) == n)
+    assert(pack("<f", n) == pack(">f", n):reverse())
+    assert(pack(">d", n) == pack("<d", n):reverse())
+end
+
+-- for non-native precisions, test only with "round" numbers
+for _, n in ipairs{0, -1.5, 1/0, -1/0, 1e10, -1e9, 0.5, 2000.25} do
+  assert(unpack("<f", pack("<f", n)) == n)
+  assert(unpack(">f", pack(">f", n)) == n)
+  assert(unpack("<d", pack("<d", n)) == n)
+  assert(unpack(">d", pack(">d", n)) == n)
+end
+
+print "testing pack/unpack of strings"
+do
+  local s = string.rep("abc", 1000)
+  assert(pack("zB", s, 247) == s .. "\0\xF7")
+  local s1, b = unpack("zB", s .. "\0\xF9")
+  assert(b == 249 and s1 == s)
+  s1 = pack("s", s)
+  assert(unpack("s", s1) == s)
+
+  checkerror("does not fit", pack, "s1", s)
+
+  checkerror("contains zeros", pack, "z", "alo\0");
+
+  for i = 2, NB do
+    local s1 = pack("s" .. i, s)
+    assert(unpack("s" .. i, s1) == s and #s1 == #s + i)
+  end
+end
+
+do
+  local x = pack("s", "alo")
+  checkerror("too short", unpack, "s", x:sub(1, -2))
+  checkerror("too short", unpack, "c5", "abcd")
+  checkerror("out of limits", pack, "s100", "alo")
+end
+
+do
+  assert(pack("c0", "") == "")
+  assert(packsize("c0") == 0)
+  assert(unpack("c0", "") == "")
+  assert(pack("<! c3", "abc") == "abc")
+  assert(packsize("<! c3") == 3)
+  assert(pack(">!4 c6", "abcdef") == "abcdef")
+  checkerror("wrong length", pack, "c3", "ab")
+  checkerror("2", pack, "c5", "123456")
+  local a, b, c = unpack("!4 z c3", "abcdefghi\0xyz")
+  assert(a == "abcdefghi" and b == "xyz" and c == 14)
+end
+
+
+-- testing multiple types and sequence
+do
+  local x = pack("<b h b f d f n i", 1, 2, 3, 4, 5, 6, 7, 8)
+  assert(#x == packsize("<b h b f d f n i"))
+  local a, b, c, d, e, f, g, h = unpack("<b h b f d f n i", x)
+  assert(a == 1 and b == 2 and c == 3 and d == 4 and e == 5 and f == 6 and
+         g == 7 and h == 8) 
+end
+
+print "testing alignment"
+do
+  assert(pack(" < i1 i2 ", 2, 3) == "\2\3\0")   -- no alignment by default
+  local x = pack(">!8 b Xh i4 i8 c1 Xi8", -12, 100, 200, "\xEC")
+  assert(#x == packsize(">!8 b Xh i4 i8 c1 Xi8"))
+  assert(x == "\xf4" .. "\0\0\0" ..
+              "\0\0\0\100" ..
+              "\0\0\0\0\0\0\0\xC8" .. 
+              "\xEC" .. "\0\0\0\0\0\0\0")
+  local a, b, c, d, pos = unpack(">!8 c1 Xh i4 i8 b Xi8 XI XH", x)
+  assert(a == "\xF4" and b == 100 and c == 200 and d == -20 and (pos - 1) == #x)
+
+  x = pack(">!4 c3 c4 c2 z i4 c5 c2 Xi4",
+                  "abc", "abcd", "xz", "hello", 5, "world", "xy")
+  assert(x == "abcabcdxzhello\0\0\0\0\0\5worldxy\0")
+  local a, b, c, d, e, f, g, pos = unpack(">!4 c3 c4 c2 z i4 c5 c2 Xh Xi4", x)
+  assert(a == "abc" and b == "abcd" and c == "xz" and d == "hello" and
+         e == 5 and f == "world" and g == "xy" and (pos - 1) % 4 == 0)
+
+  x = pack(" b b Xd b Xb x", 1, 2, 3)
+  assert(packsize(" b b Xd b Xb x") == 4)
+  assert(x == "\1\2\3\0")
+  a, b, c, pos = unpack("bbXdb", x)
+  assert(a == 1 and b == 2 and c == 3 and pos == #x)
+
+  -- only alignment
+  assert(packsize("!8 xXi8") == 8)
+  local pos = unpack("!8 xXi8", "0123456701234567"); assert(pos == 9)
+  assert(packsize("!8 xXi2") == 2)
+  local pos = unpack("!8 xXi2", "0123456701234567"); assert(pos == 3)
+  assert(packsize("!2 xXi2") == 2)
+  local pos = unpack("!2 xXi2", "0123456701234567"); assert(pos == 3)
+  assert(packsize("!2 xXi8") == 2)
+  local pos = unpack("!2 xXi8", "0123456701234567"); assert(pos == 3)
+  assert(packsize("!16 xXi16") == 16)
+  local pos = unpack("!16 xXi16", "0123456701234567"); assert(pos == 17)
+
+  checkerror("invalid next option", pack, "X")
+  checkerror("invalid next option", unpack, "XXi", "")
+  checkerror("invalid next option", unpack, "X i", "")
+  checkerror("invalid next option", pack, "Xc1")
+end
+
+do    -- testing initial position
+  local x = pack("i4i4i4i4", 1, 2, 3, 4)
+  for pos = 1, 16, 4 do
+    local i, p = unpack("i4", x, pos)
+    assert(i == pos//4 + 1 and p == pos + 4)
+  end
+
+  -- with alignment
+  for pos = 0, 12 do    -- will always round position to power of 2
+    local i, p = unpack("!4 i4", x, pos + 1)
+    assert(i == (pos + 3)//4 + 1 and p == i*4 + 1)
+  end
+
+  -- negative indices
+  local i, p = unpack("!4 i4", x, -4)
+  assert(i == 4 and p == 17)
+  local i, p = unpack("!4 i4", x, -7)
+  assert(i == 4 and p == 17)
+  local i, p = unpack("!4 i4", x, -#x)
+  assert(i == 1 and p == 5)
+
+  -- limits
+  for i = 1, #x + 1 do
+    assert(unpack("c0", x, i) == "")
+  end
+  checkerror("out of string", unpack, "c0", x, 0)
+  checkerror("out of string", unpack, "c0", x, #x + 2)
+  checkerror("out of string", unpack, "c0", x, -(#x + 1))
+ 
+end
+
+print "OK"
+
diff --git a/lua-5.3.1-tests/vararg.lua b/lua-5.3.1-tests/vararg.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/vararg.lua
@@ -0,0 +1,141 @@
+-- $Id: vararg.lua,v 1.24 2015/06/01 16:38:36 roberto Exp $
+
+print('testing vararg')
+
+function f(a, ...)
+  local arg = {n = select('#', ...), ...}
+  for i=1,arg.n do assert(a[i]==arg[i]) end
+  return arg.n
+end
+
+function c12 (...)
+  assert(arg == _G.arg)    -- no local 'arg'
+  local x = {...}; x.n = #x
+  local res = (x.n==2 and x[1] == 1 and x[2] == 2)
+  if res then res = 55 end
+  return res, 2
+end
+
+function vararg (...) return {n = select('#', ...), ...} end
+
+local call = function (f, args) return f(table.unpack(args, 1, args.n)) end
+
+assert(f() == 0)
+assert(f({1,2,3}, 1, 2, 3) == 3)
+assert(f({"alo", nil, 45, f, nil}, "alo", nil, 45, f, nil) == 5)
+
+assert(c12(1,2)==55)
+a,b = assert(call(c12, {1,2}))
+assert(a == 55 and b == 2)
+a = call(c12, {1,2;n=2})
+assert(a == 55 and b == 2)
+a = call(c12, {1,2;n=1})
+assert(not a)
+assert(c12(1,2,3) == false)
+local a = vararg(call(next, {_G,nil;n=2}))
+local b,c = next(_G)
+assert(a[1] == b and a[2] == c and a.n == 2)
+a = vararg(call(call, {c12, {1,2}}))
+assert(a.n == 2 and a[1] == 55 and a[2] == 2)
+a = call(print, {'+'})
+assert(a == nil)
+
+local t = {1, 10}
+function t:f (...) local arg = {...}; return self[...]+#arg end
+assert(t:f(1,4) == 3 and t:f(2) == 11)
+print('+')
+
+lim = 20
+local i, a = 1, {}
+while i <= lim do a[i] = i+0.3; i=i+1 end
+
+function f(a, b, c, d, ...)
+  local more = {...}
+  assert(a == 1.3 and more[1] == 5.3 and
+         more[lim-4] == lim+0.3 and not more[lim-3])
+end
+
+function g(a,b,c)
+  assert(a == 1.3 and b == 2.3 and c == 3.3)
+end
+
+call(f, a)
+call(g, a)
+
+a = {}
+i = 1
+while i <= lim do a[i] = i; i=i+1 end
+assert(call(math.max, a) == lim)
+
+print("+")
+
+
+-- new-style varargs
+
+function oneless (a, ...) return ... end
+
+function f (n, a, ...)
+  local b
+  assert(arg == _G.arg)   -- no local 'arg'
+  if n == 0 then
+    local b, c, d = ...
+    return a, b, c, d, oneless(oneless(oneless(...)))
+  else
+    n, b, a = n-1, ..., a
+    assert(b == ...)
+    return f(n, a, ...)
+  end
+end
+
+a,b,c,d,e = assert(f(10,5,4,3,2,1))
+assert(a==5 and b==4 and c==3 and d==2 and e==1)
+
+a,b,c,d,e = f(4)
+assert(a==nil and b==nil and c==nil and d==nil and e==nil)
+
+
+-- varargs for main chunks
+f = load[[ return {...} ]]
+x = f(2,3)
+assert(x[1] == 2 and x[2] == 3 and x[3] == nil)
+
+
+f = load[[
+  local x = {...}
+  for i=1,select('#', ...) do assert(x[i] == select(i, ...)) end
+  assert(x[select('#', ...)+1] == nil)
+  return true
+]]
+
+assert(f("a", "b", nil, {}, assert))
+assert(f())
+
+a = {select(3, table.unpack{10,20,30,40})}
+assert(#a == 2 and a[1] == 30 and a[2] == 40)
+a = {select(1)}
+assert(next(a) == nil)
+a = {select(-1, 3, 5, 7)}
+assert(a[1] == 7 and a[2] == nil)
+a = {select(-2, 3, 5, 7)}
+assert(a[1] == 5 and a[2] == 7 and a[3] == nil)
+pcall(select, 10000)
+pcall(select, -10000)
+
+
+-- bug in 5.2.2
+
+function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10,
+p11, p12, p13, p14, p15, p16, p17, p18, p19, p20,
+p21, p22, p23, p24, p25, p26, p27, p28, p29, p30,
+p31, p32, p33, p34, p35, p36, p37, p38, p39, p40,
+p41, p42, p43, p44, p45, p46, p48, p49, p50, ...)
+  local a1,a2,a3,a4,a5,a6,a7
+  local a8,a9,a10,a11,a12,a13,a14
+end
+
+-- assertion fail here
+f()
+
+
+print('OK')
+
diff --git a/lua-5.3.1-tests/verybig.lua b/lua-5.3.1-tests/verybig.lua
new file mode 100644
--- /dev/null
+++ b/lua-5.3.1-tests/verybig.lua
@@ -0,0 +1,151 @@
+-- $Id: verybig.lua,v 1.24 2014/12/26 17:20:53 roberto Exp $
+
+print "testing RK"
+
+-- testing opcodes with RK arguments larger than K limit
+local function foo ()
+  local dummy = {
+     -- fill first 256 entries in table of constants
+     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+     17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+     33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+     49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+     65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
+     81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96,
+     97, 98, 99, 100, 101, 102, 103, 104,
+     105, 106, 107, 108, 109, 110, 111, 112,
+     113, 114, 115, 116, 117, 118, 119, 120,
+     121, 122, 123, 124, 125, 126, 127, 128,
+     129, 130, 131, 132, 133, 134, 135, 136,
+     137, 138, 139, 140, 141, 142, 143, 144,
+     145, 146, 147, 148, 149, 150, 151, 152,
+     153, 154, 155, 156, 157, 158, 159, 160,
+     161, 162, 163, 164, 165, 166, 167, 168,
+     169, 170, 171, 172, 173, 174, 175, 176,
+     177, 178, 179, 180, 181, 182, 183, 184,
+     185, 186, 187, 188, 189, 190, 191, 192,
+     193, 194, 195, 196, 197, 198, 199, 200,
+     201, 202, 203, 204, 205, 206, 207, 208,
+     209, 210, 211, 212, 213, 214, 215, 216,
+     217, 218, 219, 220, 221, 222, 223, 224,
+     225, 226, 227, 228, 229, 230, 231, 232,
+     233, 234, 235, 236, 237, 238, 239, 240,
+     241, 242, 243, 244, 245, 246, 247, 248,
+     249, 250, 251, 252, 253, 254, 255, 256,
+  }
+  assert(24.5 + 0.6 == 25.1)
+  local t = {foo = function (self, x) return x + self.x end, x = 10}
+  t.t = t
+  assert(t:foo(1.5) == 11.5)
+  assert(t.t:foo(0.5) == 10.5)   -- bug in 5.2 alpha
+  assert(24.3 == 24.3)
+  assert((function () return t.x end)() == 10)
+end
+
+
+foo()
+foo = nil
+
+if _soft then return 10 end
+
+print "testing large programs (>64k)"
+
+-- template to create a very big test file
+prog = [[$
+
+local a,b
+
+b = {$1$
+  b30009 = 65534,
+  b30010 = 65535,
+  b30011 = 65536,
+  b30012 = 65537,
+  b30013 = 16777214,
+  b30014 = 16777215,
+  b30015 = 16777216,
+  b30016 = 16777217,
+  b30017 = 0x7fffff,
+  b30018 = -0x7fffff,
+  b30019 = 0x1ffffff,
+  b30020 = -0x1ffffd,
+  b30021 = -65534,
+  b30022 = -65535,
+  b30023 = -65536,
+  b30024 = -0xffffff,
+  b30025 = 15012.5,
+  $2$
+};
+
+assert(b.a50008 == 25004 and b["a11"] == -5.5)
+assert(b.a33007 == -16503.5 and b.a50009 == -25004.5)
+assert(b["b"..30024] == -0xffffff)
+
+function b:xxx (a,b) return a+b end
+assert(b:xxx(10, 12) == 22)   -- pushself with non-constant index
+b.xxx = nil
+
+s = 0; n=0
+for a,b in pairs(b) do s=s+b; n=n+1 end
+-- with 32-bit floats, exact value of 's' depends on summation order
+assert(81800000.0 < s and s < 81860000 and n == 70001)
+
+a = nil; b = nil
+print'+'
+
+function f(x) b=x end
+
+a = f{$3$} or 10
+
+assert(a==10)
+assert(b[1] == "a10" and b[2] == 5 and b[#b-1] == "a50009")
+
+
+function xxxx (x) return b[x] end
+
+assert(xxxx(3) == "a11")
+
+a = nil; b=nil
+xxxx = nil
+
+return 10
+
+]]
+
+-- functions to fill in the $n$
+
+local function sig (x)
+  return (x % 2 == 0) and '' or '-'
+end
+
+F = {
+function ()   -- $1$
+  for i=10,50009 do
+    io.write('a', i, ' = ', sig(i), 5+((i-10)/2), ',\n')
+  end
+end,
+
+function ()   -- $2$
+  for i=30026,50009 do
+    io.write('b', i, ' = ', sig(i), 15013+((i-30026)/2), ',\n')
+  end
+end,
+
+function ()   -- $3$
+  for i=10,50009 do
+    io.write('"a', i, '", ', sig(i), 5+((i-10)/2), ',\n')
+  end
+end,
+}
+
+file = os.tmpname()
+io.output(file)
+for s in string.gmatch(prog, "$([^$]+)") do
+  local n = tonumber(s)
+  if not n then io.write(s) else F[n]() end
+end
+io.close()
+result = dofile(file)
+assert(os.remove(file))
+print'OK'
+return result
+
diff --git a/src/Language/Lua/Annotated/Lexer.x b/src/Language/Lua/Annotated/Lexer.x
--- a/src/Language/Lua/Annotated/Lexer.x
+++ b/src/Language/Lua/Annotated/Lexer.x
@@ -8,11 +8,11 @@
   , AlexPosn(..)
   ) where
 
-import Language.Lua.Annotated.Syntax
 import Language.Lua.Token
 import Control.Applicative ((<$>))
 import Control.Monad (forM_, unless, when)
 import Data.Char (isNumber)
+import Data.List (foldl')
 import Safe (readMay)
 
 }
@@ -32,8 +32,8 @@
 $longstr  = \0-\255                      -- valid character in a long string
 
 -- escape characters
-@charescd  = \\ ([ntvbrfa\\\?'"] | $digit{1,3} | x$hexdigit{2} | \n | z [$space \n]*)
-@charescs  = \\ ([ntvbrfa\\\?"'] | $digit{1,3} | x$hexdigit{2} | \n | z [$space \n]*)
+@charescd  = \\ ([ntvbrfa\\\?'"] | $digit{1,3} | x$hexdigit{2} | u\{$hexdigit{1,}\} | \n | z [$space \n]*)
+@charescs  = \\ ([ntvbrfa\\\?"'] | $digit{1,3} | x$hexdigit{2} | u\{$hexdigit{1,}\} | \n | z [$space \n]*)
 
 @digits    = $digit+
 @hexdigits = $hexdigit+
@@ -98,6 +98,12 @@
     <0> "."   { tok LTokDot }
     <0> ".."  { tok LTokDDot }
     <0> "..." { tok LTokEllipsis }
+    <0> "&"   { tok LTokAmpersand }
+    <0> "|"   { tok LTokPipe }
+    <0> "~"   { tok LTokTilde }
+    <0> "<<"  { tok LTokDLT }
+    <0> ">>"  { tok LTokDGT }
+    <0> "//"  { tok LTokDGT }
 
 {
 
@@ -236,6 +242,13 @@
 replaceCharCodes s =
   case s of
     ('\\' : 'x' : h1 : h2 : rest) -> toEnum (hexToInt h1 * 16 + hexToInt h2) : replaceCharCodes rest
+    ('\\' : 'u' : '{' : rest) ->
+        case break (=='}') rest of
+          (ds,_:rest')
+             | code <= 0x10ffff -> toEnum code : replaceCharCodes rest'
+             | otherwise        -> '\xFFFD' : replaceCharCodes rest'
+             where code = foldl' (\acc d -> acc * 16 + hexToInt d) 0 ds
+          _ -> error "lexical error: unterminated unicode escape"
     ('\\' : c1 : c2 : c3 : rest)
       | isNumber c1 && isNumber c2 && isNumber c3 ->
           toEnum (decToNum c1 * 100 + decToNum c2 * 10 + decToNum c3) : replaceCharCodes rest
@@ -292,8 +305,6 @@
       [ "lexical error near line: ", show line, " col: ", show col, ": Cannot read string " ++ show s ]
     Just s' -> s'
 
-data EOF = EOF deriving Show
-
 -- | Lua token with position information.
 type LTok = (LToken, AlexPosn)
 
@@ -375,9 +386,15 @@
             else do toks <- loop
                     return (t:toks)
 
+-- | Drop the first line of a Lua file when it starts with a '#'
+dropSpecialComment :: String -> String
+dropSpecialComment ('#':xs) = dropWhile (/='\n') xs
+dropSpecialComment xs = xs
+-- Newline is preserved in order to ensure that line numbers stay correct
+
 -- | Lua lexer.
 llex :: String -> [LTok]
-llex s = case scanner s of
+llex s = case scanner (dropSpecialComment s) of
            Left err -> error err
            Right r  -> r
 
diff --git a/src/Language/Lua/Annotated/Parser.hs b/src/Language/Lua/Annotated/Parser.hs
--- a/src/Language/Lua/Annotated/Parser.hs
+++ b/src/Language/Lua/Annotated/Parser.hs
@@ -1,5 +1,9 @@
-{-# LANGUAGE LambdaCase, TupleSections #-}
+{-# LANGUAGE LambdaCase, TupleSections, CPP #-}
 
+#ifndef MIN_VERSION_base
+#define MIN_VERSION_base(x,y,z) 1
+#endif
+
 module Language.Lua.Annotated.Parser
   ( parseText
   , parseNamedText
@@ -9,7 +13,6 @@
   , chunk
   ) where
 
-import           Control.Applicative           ((<$>), (<*), (<*>))
 import           Control.Monad                 (liftM)
 import           Prelude                       hiding (EQ, GT, LT, exp)
 import           Text.Parsec                   hiding (string)
@@ -19,6 +22,10 @@
 import           Language.Lua.Annotated.Syntax
 import           Language.Lua.Token
 
+#if !(MIN_VERSION_base(4,8,0))
+import           Control.Applicative           ((<$>), (<*), (<*>))
+#endif
+
 -- | Runs Lua lexer before parsing. Use @parseText stat@ to parse
 -- statements, and @parseText exp@ to parse expressions.
 parseText :: Parser a -> String -> Either ParseError a
@@ -76,7 +83,7 @@
         selectExp    = SSelectExp <$> getPosition <*> brackets exp
         selectMethod = do
           pos <- getPosition
-          tok LTokColon
+          tok' LTokColon
           SSelectMethod pos <$> name <*> funArg
         funarg       = SFunCall <$> getPosition <*> funArg
 
@@ -90,8 +97,8 @@
 
   where t' :: PrefixExp SourcePos
         t' = case t of
-               PName pos name -> PEVar pos (VarName pos name)
-               PParen pos exp -> Paren pos exp
+               PName pos  n -> PEVar pos (VarName pos n)
+               PParen pos e -> Paren pos e
 
         iter :: [SuffixExp SourcePos] -> PrefixExp SourcePos -> PrefixExp SourcePos
         iter [] pe                                = pe
@@ -102,10 +109,10 @@
 
 -- TODO: improve error messages.
 sexpToVar :: SuffixedExp SourcePos -> Parser (Var SourcePos)
-sexpToVar (SuffixedExp pos (PName _ name) []) = return (VarName pos name)
+sexpToVar (SuffixedExp pos (PName _ n) []) = return (VarName pos n)
 sexpToVar (SuffixedExp _ _ []) = fail "syntax error"
 sexpToVar sexp = case sexpToPexp sexp of
-                   PEVar _ var -> return var
+                   PEVar _ v -> return v
                    _ -> fail "syntax error"
 
 sexpToFunCall :: SuffixedExp SourcePos -> Parser (FunCall SourcePos)
@@ -134,7 +141,7 @@
     pos <- getPosition
     (params, vararg) <- arglist
     body <- block
-    tok LTokEnd
+    tok' LTokEnd
     return $ FunBody pos params vararg body
 
   where lastarg = do
@@ -158,7 +165,7 @@
 
 retstat :: Parser [Exp SourcePos]
 retstat = do
-  tok LTokReturn
+  tok' LTokReturn
   exps <- exp `sepBy` tok LTokComma
   optional (tok LTokSemic)
   return exps
@@ -169,7 +176,7 @@
         expField = do
             pos <- getPosition
             e1 <- brackets exp
-            tok LTokAssign
+            tok' LTokAssign
             e2 <- exp
             return $ ExpField pos e1 e2
 
@@ -177,7 +184,7 @@
         namedField = do
             pos <- getPosition
             name' <- name
-            tok LTokAssign
+            tok' LTokAssign
             val <- exp
             return $ NamedField pos name' val
 
@@ -214,7 +221,7 @@
 
 fundefExp = do
   pos <- getPosition
-  tok LTokFunction
+  tok' LTokFunction
   body <- funBody
   return $ EFunDef pos (FunDef (ann body) body)
 
@@ -236,6 +243,11 @@
     , tok LTokExp >> return (Binop pos (Exp pos), 14, 13)
     , tok LTokPercent >> return (Binop pos (Mod pos), 11, 11)
     , tok LTokDDot >> return (Binop pos (Concat pos), 9, 8)
+    , tok LTokDGT >> return (Binop pos (ShiftR pos), 7, 7)
+    , tok LTokDLT >> return (Binop pos (ShiftL pos), 7, 7)
+    , tok LTokAmpersand >> return (Binop pos (BAnd pos), 6, 6)
+    , tok LTokTilde >> return (Binop pos (BXor pos), 5, 5)
+    , tok LTokPipe >> return (Binop pos (BOr pos), 4, 4)
     , tok LTokLT >> return (Binop pos (LT pos), 3, 3)
     , tok LTokLEq >> return (Binop pos (LTE pos), 3, 3)
     , tok LTokGT >> return (Binop pos (GT pos), 3, 3)
@@ -253,6 +265,7 @@
       [ tok LTokMinus >> return Neg
       , tok LTokNot >> return Not
       , tok LTokSh >> return Len
+      , tok LTokTilde >> return Complement
       ]
     return (Unop pos (unopTok pos), 12)
 
@@ -290,15 +303,14 @@
 
 assignStat = do
   pos <- getPosition
-  vars <- var `sepBy` tok LTokComma
-  tok LTokAssign
-  exps <- exp `sepBy` tok LTokComma
+  vars <- varlist
+  tok' LTokAssign
+  exps <- explist
   return $ Assign pos vars exps
 
 funCallStat = FunCall <$> getPosition <*> funCall
 
-labelStat = Label <$> getPosition <*> label
-  where label = between (tok LTokDColon) (tok LTokDColon) name
+labelStat = Label <$> getPosition <*> between (tok LTokDColon) (tok LTokDColon) name
 
 breakStat = (Break <$> getPosition) <* tok LTokBreak
 
@@ -311,15 +323,15 @@
   between (tok LTokWhile)
           (tok LTokEnd)
           (do cond <- exp
-              tok LTokDo
+              tok' LTokDo
               body <- block
               return $ While pos cond body)
 
 repeatStat = do
   pos <- getPosition
-  tok LTokRepeat
+  tok' LTokRepeat
   body <- block
-  tok LTokUntil
+  tok' LTokUntil
   cond <- exp
   return $ Repeat pos body cond
 
@@ -340,25 +352,25 @@
 
         cond :: Parser (Exp SourcePos, Block SourcePos)
         cond = do
-            cond <- exp
-            tok LTokThen
+            cond' <- exp
+            tok' LTokThen
             body <- block
-            return (cond, body)
+            return (cond', body)
 
         elsePart :: Parser (Block SourcePos)
         elsePart = tok LTokElse >> block
 
 forRangeStat = do
   pos <- getPosition
-  between (tok LTokFor)
-          (tok LTokEnd)
+  between (tok' LTokFor)
+          (tok' LTokEnd)
           (do name' <- name
-              tok LTokAssign
+              tok' LTokAssign
               start <- exp
-              tok LTokComma
+              tok' LTokComma
               end <- exp
               range <- optionMaybe $ tok LTokComma >> exp
-              tok LTokDo
+              tok' LTokDo
               body <- block
               return $ ForRange pos name' start end range body)
 
@@ -366,16 +378,16 @@
   pos <- getPosition
   between (tok LTokFor)
           (tok LTokEnd)
-          (do names <- name `sepBy` tok LTokComma
-              tok LTokIn
-              exps <- exp `sepBy` tok LTokComma
-              tok LTokDo
+          (do names <- namelist
+              tok' LTokIn
+              exps <- explist
+              tok' LTokDo
               body <- block
               return $ ForIn pos names exps body)
 
 funAssignStat = do
     pos <- getPosition
-    tok LTokFunction
+    tok' LTokFunction
     name' <- funName
     body <- funBody
     return $ FunAssign pos name' body
@@ -387,17 +399,17 @@
 
 localFunAssignStat = do
   pos <- getPosition
-  tok LTokLocal
-  tok LTokFunction
+  tok' LTokLocal
+  tok' LTokFunction
   name' <- name
   body <- funBody
   return $ LocalFunAssign pos name' body
 
 localAssignStat = do
   pos <- getPosition
-  tok LTokLocal
-  names <- name `sepBy` tok LTokComma
-  rest <- optionMaybe $ tok LTokAssign >> exp `sepBy` tok LTokComma
+  tok' LTokLocal
+  names <- namelist
+  rest <- optionMaybe $ tok LTokAssign >> explist
   return $ LocalAssign pos names rest
 
 -- | Statement parser.
@@ -418,6 +430,20 @@
          , try localFunAssignStat
          , localAssignStat
          ]
+
+-----------------------------------------------------------------------
+---- Utilities/helpers
+
+varlist :: Parser [Var SourcePos]
+varlist = var `sepBy1` tok LTokComma
+
+namelist :: Parser [Name SourcePos]
+namelist = name `sepBy1` tok LTokComma
+
+explist :: Parser [Exp SourcePos]
+explist = exp `sepBy1` tok LTokComma
+
+-----------------------------------------------------------------------
 
 -- | Lua file parser.
 chunk :: Parser (Block SourcePos)
diff --git a/src/Language/Lua/Annotated/Simplify.hs b/src/Language/Lua/Annotated/Simplify.hs
--- a/src/Language/Lua/Annotated/Simplify.hs
+++ b/src/Language/Lua/Annotated/Simplify.hs
@@ -87,11 +87,17 @@
 sBinop A.NEQ{} = NEQ
 sBinop A.And{} = And
 sBinop A.Or{} = Or
+sBinop A.BAnd{} = BAnd
+sBinop A.BOr{} = BOr
+sBinop A.BXor{} = BXor
+sBinop A.ShiftL{} = ShiftL
+sBinop A.ShiftR{} = ShiftR
 
 sUnop :: A.Unop a -> Unop
 sUnop A.Neg{} = Neg
 sUnop A.Not{} = Not
 sUnop A.Len{} = Len
+sUnop A.Complement{} = Complement
 
 sFunArg :: A.FunArg a -> FunArg
 sFunArg (A.Args _ es) = Args (map sExp es)
diff --git a/src/Language/Lua/Annotated/Syntax.hs b/src/Language/Lua/Annotated/Syntax.hs
--- a/src/Language/Lua/Annotated/Syntax.hs
+++ b/src/Language/Lua/Annotated/Syntax.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE DeriveDataTypeable, DeriveFunctor, DeriveGeneric #-}
 
--- | Lua 5.2 syntax tree, as specified in <http://www.lua.org/manual/5.2/manual.html#9>.
+-- | Lua 5.3 syntax tree, as specified in <http://www.lua.org/manual/5.3/manual.html#9>.
 -- Annotation implementation is inspired by haskell-src-exts.
 module Language.Lua.Annotated.Syntax where
 
@@ -50,9 +50,10 @@
 
 data Binop a = Add a | Sub a | Mul a | Div a | Exp a | Mod a | Concat a
     | LT a | LTE a | GT a | GTE a | EQ a | NEQ a | And a | Or a
+    | ShiftL a | ShiftR a | BAnd a | BOr a | BXor a
     deriving (Show, Eq, Functor, Data, Typeable, Generic)
 
-data Unop a = Neg a | Not a | Len a
+data Unop a = Neg a | Not a | Len a | Complement a
     deriving (Show, Eq, Functor, Data, Typeable, Generic)
 
 data PrefixExp a
@@ -184,6 +185,11 @@
     ann (NEQ a) = a
     ann (And a) = a
     ann (Or a) = a
+    ann (BAnd a) = a
+    ann (BOr a) = a
+    ann (BXor a) = a
+    ann (ShiftL a) = a
+    ann (ShiftR a) = a
 
     amap f (Add a) = Add (f a)
     amap f (Sub a) = Sub (f a)
@@ -200,15 +206,22 @@
     amap f (NEQ a) = NEQ (f a)
     amap f (And a) = And (f a)
     amap f (Or a) = Or (f a)
+    amap f (BAnd a) = BAnd (f a)
+    amap f (BOr a) = BOr (f a)
+    amap f (BXor a) = BXor (f a)
+    amap f (ShiftL a) = ShiftL (f a)
+    amap f (ShiftR a) = ShiftR (f a)
 
 instance Annotated Unop where
     ann (Neg a) = a
     ann (Not a) = a
     ann (Len a) = a
+    ann (Complement a) = a
 
     amap f (Neg a) = Neg (f a)
     amap f (Not a) = Not (f a)
     amap f (Len a) = Len (f a)
+    amap f (Complement a) = Complement (f a)
 
 instance Annotated PrefixExp where
     ann (PEVar a _) = a
diff --git a/src/Language/Lua/PrettyPrinter.hs b/src/Language/Lua/PrettyPrinter.hs
--- a/src/Language/Lua/PrettyPrinter.hs
+++ b/src/Language/Lua/PrettyPrinter.hs
@@ -85,11 +85,17 @@
     pprint NEQ    = text "~="
     pprint And    = text "and"
     pprint Or     = text "or"
+    pprint BAnd   = char '&'
+    pprint BOr    = char '|'
+    pprint BXor   = char '~'
+    pprint ShiftL = text "<<"
+    pprint ShiftR = text ">>"
 
 instance LPretty Unop where
     pprint Neg = char '-'
     pprint Not = text "not "
     pprint Len = char '#'
+    pprint Complement = char '~'
 
 getBinopPrec :: Binop -> (Precedence, Precedence)
 getBinopPrec op =
@@ -101,6 +107,11 @@
       Exp -> (14, 13)
       Mod -> (11, 11)
       Concat -> (9, 8)
+      ShiftL -> (7, 7)
+      ShiftR -> (7, 7)
+      BAnd -> (6, 6)
+      BXor -> (5, 5)
+      BOr -> (4, 4)
       LT -> (3, 3)
       LTE -> (3, 3)
       GT -> (3, 3)
@@ -188,6 +199,9 @@
       where
         printIf ((guard, block) : xs) e =
           nest 2 (text "if" <+> pprint guard <+> text "then" <$> pprint block) <$> printIf' xs e
+        printIf [] _ =
+          error $ "pprint: Trying to print invalid syntax:\n\t" ++
+                  "if statement should have at least one case"
 
         printIf' [] Nothing  = text "end"
         printIf' [] (Just b) = nest 2 (text "else" <$> pprint b) <$> text "end"
diff --git a/src/Language/Lua/Syntax.hs b/src/Language/Lua/Syntax.hs
--- a/src/Language/Lua/Syntax.hs
+++ b/src/Language/Lua/Syntax.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE DeriveDataTypeable, DeriveGeneric #-}
 
--- | Lua 5.2 syntax tree, as specified in <http://www.lua.org/manual/5.2/manual.html#9>.
+-- | Lua 5.3 syntax tree, as specified in <http://www.lua.org/manual/5.3/manual.html#9>.
 module Language.Lua.Syntax where
 
 import           Control.DeepSeq (NFData)
@@ -49,9 +49,10 @@
 
 data Binop = Add | Sub | Mul | Div | Exp | Mod | Concat
     | LT | LTE | GT | GTE | EQ | NEQ | And | Or
+    | ShiftL | ShiftR | BAnd | BOr | BXor
     deriving (Show, Eq, Data, Typeable, Generic)
 
-data Unop = Neg | Not | Len
+data Unop = Neg | Not | Len | Complement
     deriving (Show, Eq, Data, Typeable, Generic)
 
 data PrefixExp
diff --git a/src/Language/Lua/Token.hs b/src/Language/Lua/Token.hs
--- a/src/Language/Lua/Token.hs
+++ b/src/Language/Lua/Token.hs
@@ -28,6 +28,12 @@
             | LTokDot                -- ^.
             | LTokDDot               -- ^..
             | LTokEllipsis           -- ^...
+            | LTokDLT                -- ^<<
+            | LTokDGT                -- ^>>
+            | LTokAmpersand          -- ^&
+            | LTokPipe               -- ^|
+            | LTokDSlash             -- ^//
+            | LTokTilde              -- ^~
 
             | LTokAnd                -- ^and
             | LTokBreak              -- ^break
@@ -66,7 +72,7 @@
     show LTokPercent       = "`%`"
     show LTokExp           = "`^`"
     show LTokSh            = "`#`"
-    show LTokEqual         = "`=`"
+    show LTokEqual         = "`==`"
     show LTokNotequal      = "`~=`"
     show LTokLEq           = "`<=`"
     show LTokGEq           = "`>=`"
@@ -86,6 +92,12 @@
     show LTokDot           = "`.`"
     show LTokDDot          = "`..`"
     show LTokEllipsis      = "`...`"
+    show LTokDLT           = "`<<`"
+    show LTokDGT           = "`>>`"
+    show LTokAmpersand     = "`&`"
+    show LTokPipe          = "`|`"
+    show LTokDSlash        = "`//`"
+    show LTokTilde         = "`~`"
 
     show LTokAnd           = "`and`"
     show LTokBreak         = "`break`"
diff --git a/src/Text/Parsec/LTok.hs b/src/Text/Parsec/LTok.hs
--- a/src/Text/Parsec/LTok.hs
+++ b/src/Text/Parsec/LTok.hs
@@ -1,9 +1,9 @@
-{-# LANGUAGE FlexibleContexts, NoMonomorphismRestriction #-}
-{-# OPTIONS_GHC -Wall #-}
+{-# LANGUAGE FlexibleContexts #-}
 
 -- | Lexer/Parsec interface
 module Text.Parsec.LTok
   ( tok
+  , tok'
   , anyIdent
   , number
   , stringlit
@@ -35,6 +35,9 @@
 -- | Parses given `LToken`.
 tok :: (Stream [LTok] m LTok) => LToken -> ParsecT [LTok] u m LToken
 tok t = satisfy (\(t', _) -> t' == t) <?> show t
+
+tok' :: (Stream [LTok] m LTok) => LToken -> ParsecT [LTok] u m ()
+tok' p = tok p >> return ()
 
 -- | Parses a `LTokIdent`.
 anyIdent :: Monad m => ParsecT [LTok] u m String
diff --git a/tests/Main.hs b/tests/Main.hs
--- a/tests/Main.hs
+++ b/tests/Main.hs
@@ -34,9 +34,9 @@
 tests = testGroup "Tests" [unitTests, propertyTests]
 
 unitTests :: TestTree
-unitTests = testGroup "Unit tests" [stringTests, numberTests, regressions, lua522Tests]
+unitTests = testGroup "Unit tests" [stringTests, numberTests, regressions, lua531Tests]
   where
-    lua522Tests = parseFilesTest "Parsing Lua files from Lua 5.2.2 test suite" "lua-5.2.2-tests"
+    lua531Tests = parseFilesTest "Parsing Lua files from Lua 5.3.1 test suite" "lua-5.3.1-tests"
 
 propertyTests :: TestTree
 propertyTests = testGroup "Property tests" [{-genPrintParse-}]
@@ -47,7 +47,7 @@
 stringTests :: TestTree
 stringTests = testGroup "String tests"
     [ testCase
-        "Equal strings from 5.2.2 reference manual"
+        "Equal strings from 5.3.1 reference manual"
         (do let file = "tests/strings"
             contents <- readFile file
             case parseExps file contents of
@@ -67,7 +67,7 @@
 numberTests :: TestTree
 numberTests = testGroup "Number tests"
     [ testCase
-        "Numbers from 5.2.2 reference manual"
+        "Numbers from 5.3.1 reference manual"
         (do let file = "tests/numbers"
             contents <- readFile file
             case parseExps file contents of
@@ -108,6 +108,18 @@
         show (L.llex "[=[]]=]") `deepseq` return ()
     , testCase "Handling \\z" $
         show (L.llex "\"\\z\n  \"") `deepseq` return ()
+    , testCase "varlist parser shouldn't accept empty list of variables in local declarations" $
+        assertParseFailure (P.parseText P.stat "local = test")
+    , testCase "explist parser shouldn't accept empty list of expressions in local declarations" $
+        assertParseFailure (P.parseText P.stat "local x =")
+    , testCase "empty varlist and explist in single assignment, should be rejected" $
+        assertParseFailure (P.parseText P.stat "local =")
+    , testCase "varlist parser shouldn't accept empty list of expressions in global declarations" $
+        assertParseFailure (P.parseText P.stat "= test")
+    , testCase "explist parsers shouldn't accept empty list of expressions in global declarations" $
+        assertParseFailure (P.parseText P.stat "x =")
+    , testCase "empty list of return values should be accpeted" $
+        assertEqual "Parsed wrong" (Right $ Block [] (Just [])) (P.parseText P.chunk "return")
     ]
   where
     pp :: String -> Assertion
@@ -117,6 +129,9 @@
         Right expr' ->
           assertEqual "Printed string is not equal to original one modulo whitespace"
             (filter (not . isSpace) expr) (filter (not . isSpace) (show $ pprint expr'))
+
+    assertParseFailure (Left _parseError) = return ()
+    assertParseFailure (Right ret) = assertFailure $ "Unexpected parse: " ++ show ret
 
 parseFilesTest :: String -> FilePath -> TestTree
 parseFilesTest msg root = testCase msg $ do