diff --git a/GHCi/BinaryArray.hs b/GHCi/BinaryArray.hs
--- a/GHCi/BinaryArray.hs
+++ b/GHCi/BinaryArray.hs
@@ -5,6 +5,7 @@
 --
 module GHCi.BinaryArray(putArray, getArray) where
 
+import Prelude
 import Foreign.Ptr
 import Data.Binary
 import Data.Binary.Put (putBuilder)
diff --git a/GHCi/BreakArray.hs b/GHCi/BreakArray.hs
--- a/GHCi/BreakArray.hs
+++ b/GHCi/BreakArray.hs
@@ -19,17 +19,15 @@
 module GHCi.BreakArray
     (
       BreakArray
-#ifdef GHCI
           (BA) -- constructor is exported only for ByteCodeGen
     , newBreakArray
     , getBreak
     , setBreakOn
     , setBreakOff
     , showBreakArray
-#endif
     ) where
 
-#ifdef GHCI
+import Prelude -- See note [Why do we import Prelude here?]
 import Control.Monad
 import Data.Word
 import GHC.Word
@@ -115,6 +113,3 @@
 
 readBreakArray :: BreakArray -> Int -> IO Word8
 readBreakArray (BA array) (I# i) = readBA# array i
-#else
-data BreakArray
-#endif
diff --git a/GHCi/CreateBCO.hs b/GHCi/CreateBCO.hs
--- a/GHCi/CreateBCO.hs
+++ b/GHCi/CreateBCO.hs
@@ -13,6 +13,7 @@
 -- | Create real byte-code objects from 'ResolvedBCO's.
 module GHCi.CreateBCO (createBCOs) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import GHCi.ResolvedBCO
 import GHCi.RemoteTypes
 import GHCi.BreakArray
@@ -25,7 +26,7 @@
 import GHC.Arr          ( Array(..) )
 import GHC.Exts
 import GHC.IO
-import Control.Exception (throwIO, ErrorCall(..))
+import Control.Exception ( ErrorCall(..) )
 
 createBCOs :: [ResolvedBCO] -> IO [HValueRef]
 createBCOs bcos = do
diff --git a/GHCi/FFI.hsc b/GHCi/FFI.hsc
--- a/GHCi/FFI.hsc
+++ b/GHCi/FFI.hsc
@@ -17,6 +17,7 @@
   , freeForeignCallInfo
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Control.Exception
 import Data.Binary
 import GHC.Generics
diff --git a/GHCi/InfoTable.hsc b/GHCi/InfoTable.hsc
--- a/GHCi/InfoTable.hsc
+++ b/GHCi/InfoTable.hsc
@@ -9,85 +9,35 @@
 -- We use the RTS data structures directly via hsc2hs.
 --
 module GHCi.InfoTable
-  ( peekItbl, StgInfoTable(..)
-  , conInfoPtr
-#ifdef GHCI
-  , mkConInfoTable
-#endif
+  (
+    mkConInfoTable
   ) where
 
-#if !defined(TABLES_NEXT_TO_CODE)
-import Data.Maybe (fromJust)
-#endif
+import Prelude -- See note [Why do we import Prelude here?]
 import Foreign
-import Foreign.C -- needed for 2nd stage
-import GHC.Ptr -- needed for 2nd stage
-import GHC.Exts -- needed for 2nd stage
-import System.IO.Unsafe -- needed for 2nd stage
-
-type ItblCodes = Either [Word8] [Word32]
-
--- Ultra-minimalist version specially for constructors
-#if SIZEOF_VOID_P == 8
-type HalfWord = Word32
-#elif SIZEOF_VOID_P == 4
-type HalfWord = Word16
-#else
-#error Unknown SIZEOF_VOID_P
-#endif
-
-type EntryFunPtr = FunPtr (Ptr () -> IO (Ptr ()))
-
-data StgInfoTable = StgInfoTable {
-   entry  :: Maybe EntryFunPtr, -- Just <=> not ghciTablesNextToCode
-   ptrs   :: HalfWord,
-   nptrs  :: HalfWord,
-   tipe   :: HalfWord,
-   srtlen :: HalfWord,
-   code   :: Maybe ItblCodes -- Just <=> ghciTablesNextToCode
-  }
-
-peekItbl :: Ptr StgInfoTable -> IO StgInfoTable
-peekItbl a0 = do
-#if defined(TABLES_NEXT_TO_CODE)
-  let entry' = Nothing
-#else
-  entry' <- Just <$> (#peek StgInfoTable, entry) a0
-#endif
-  ptrs' <- (#peek StgInfoTable, layout.payload.ptrs) a0
-  nptrs' <- (#peek StgInfoTable, layout.payload.nptrs) a0
-  tipe' <- (#peek StgInfoTable, type) a0
-  srtlen' <- (#peek StgInfoTable, srt_bitmap) a0
-  return StgInfoTable
-    { entry  = entry'
-    , ptrs   = ptrs'
-    , nptrs  = nptrs'
-    , tipe   = tipe'
-    , srtlen = srtlen'
-    , code   = Nothing
-    }
-
--- | Convert a pointer to an StgConInfo into an info pointer that can be
--- used in the header of a closure.
-conInfoPtr :: Ptr () -> Ptr ()
-conInfoPtr ptr
- | ghciTablesNextToCode = ptr `plusPtr` (#size StgConInfoTable)
- | otherwise            = ptr
+import Foreign.C
+import GHC.Ptr
+import GHC.Exts
+import GHC.Exts.Heap
+import Data.ByteString (ByteString)
+import qualified Data.ByteString as BS
 
 ghciTablesNextToCode :: Bool
-#ifdef TABLES_NEXT_TO_CODE
+#if defined(TABLES_NEXT_TO_CODE)
 ghciTablesNextToCode = True
 #else
 ghciTablesNextToCode = False
 #endif
 
-#ifdef GHCI /* To end */
+-- NOTE: Must return a pointer acceptable for use in the header of a closure.
+-- If tables_next_to_code is enabled, then it must point the the 'code' field.
+-- Otherwise, it should point to the start of the StgInfoTable.
 mkConInfoTable
    :: Int     -- ptr words
    -> Int     -- non-ptr words
    -> Int     -- constr tag
    -> Int     -- pointer tag
-   -> [Word8]  -- con desc
+   -> ByteString  -- con desc
    -> IO (Ptr StgInfoTable)
       -- resulting info table is allocated with allocateExec(), and
       -- should be freed with freeExec().
@@ -103,7 +53,7 @@
                          else Just entry_addr,
                  ptrs  = fromIntegral ptr_words,
                  nptrs = fromIntegral nonptr_words,
-                 tipe  = fromIntegral cONSTR,
+                 tipe  = CONSTR,
                  srtlen = fromIntegral tag,
                  code  = if ghciTablesNextToCode
                          then Just code'
@@ -126,6 +76,7 @@
           | ArchARM64
           | ArchPPC64
           | ArchPPC64LE
+          | ArchS390X
           | ArchUnknown
  deriving Show
 
@@ -149,6 +100,8 @@
        ArchPPC64
 #elif defined(powerpc64le_HOST_ARCH)
        ArchPPC64LE
+#elif defined(s390x_HOST_ARCH)
+       ArchS390X
 #else
 #    if defined(TABLES_NEXT_TO_CODE)
 #        error Unimplemented architecture
@@ -318,6 +271,20 @@
                    0x618C0000 .|. lo16 w32,
                    0x7D8903A6, 0x4E800420 ]
 
+    ArchS390X ->
+        -- Let 0xAABBCCDDEEFFGGHH be the address to jump to.
+        -- The following code loads the address into scratch
+        -- register r1 and jumps to it.
+        --
+        --    0:   C0 1E AA BB CC DD       llihf   %r1,0xAABBCCDD
+        --    6:   C0 19 EE FF GG HH       iilf    %r1,0xEEFFGGHH
+        --   12:   07 F1                   br      %r1
+
+        let w64 = fromIntegral (funPtrToInt a) :: Word64
+        in Left [ 0xC0, 0x1E, byte7 w64, byte6 w64, byte5 w64, byte4 w64,
+                  0xC0, 0x19, byte3 w64, byte2 w64, byte1 w64, byte0 w64,
+                  0x07, 0xF1 ]
+
     -- This code must not be called. You either need to
     -- add your architecture as a distinct case or
     -- use non-TABLES_NEXT_TO_CODE mode
@@ -368,12 +335,17 @@
 pokeConItbl
   :: Ptr StgConInfoTable -> Ptr StgConInfoTable -> StgConInfoTable
   -> IO ()
-pokeConItbl wr_ptr ex_ptr itbl = do
-  let _con_desc = conDesc itbl `minusPtr` (ex_ptr `plusPtr` conInfoTableSizeB)
+pokeConItbl wr_ptr _ex_ptr itbl = do
 #if defined(TABLES_NEXT_TO_CODE)
-  (#poke StgConInfoTable, con_desc) wr_ptr _con_desc
+  -- Write the offset to the con_desc from the end of the standard InfoTable
+  -- at the first byte.
+  let con_desc_offset = conDesc itbl `minusPtr` (_ex_ptr `plusPtr` conInfoTableSizeB)
+  (#poke StgConInfoTable, con_desc) wr_ptr con_desc_offset
 #else
-  (#poke StgConInfoTable, con_desc) wr_ptr (conDesc itbl)
+  -- Write the con_desc address after the end of the info table.
+  -- Use itblSize because CPP will not pick up PROFILING when calculating
+  -- the offset.
+  pokeByteOff wr_ptr itblSize (conDesc itbl)
 #endif
   pokeItbl (wr_ptr `plusPtr` (#offset StgConInfoTable, i)) (infoTable itbl)
 
@@ -385,28 +357,14 @@
        Left  xs -> sizeOf (head xs) * length xs
        Right xs -> sizeOf (head xs) * length xs
 
-pokeItbl :: Ptr StgInfoTable -> StgInfoTable -> IO ()
-pokeItbl a0 itbl = do
-#if !defined(TABLES_NEXT_TO_CODE)
-  (#poke StgInfoTable, entry) a0 (fromJust (entry itbl))
-#endif
-  (#poke StgInfoTable, layout.payload.ptrs) a0 (ptrs itbl)
-  (#poke StgInfoTable, layout.payload.nptrs) a0 (nptrs itbl)
-  (#poke StgInfoTable, type) a0 (tipe itbl)
-  (#poke StgInfoTable, srt_bitmap) a0 (srtlen itbl)
-#if defined(TABLES_NEXT_TO_CODE)
-  let code_offset = (a0 `plusPtr` (#offset StgInfoTable, code))
-  case code itbl of
-    Nothing -> return ()
-    Just (Left xs) -> pokeArray code_offset xs
-    Just (Right xs) -> pokeArray code_offset xs
-#endif
-
-newExecConItbl :: StgInfoTable -> [Word8] -> IO (FunPtr ())
+-- Note: Must return proper pointer for use in a closure
+newExecConItbl :: StgInfoTable -> ByteString -> IO (FunPtr ())
 newExecConItbl obj con_desc
    = alloca $ \pcode -> do
-        let lcon_desc = length con_desc + 1{- null terminator -}
-            sz = fromIntegral ((#size StgConInfoTable) + sizeOfEntryCode)
+        let lcon_desc = BS.length con_desc + 1{- null terminator -}
+            -- SCARY
+            -- This size represents the number of bytes in an StgConInfoTable.
+            sz = fromIntegral (conInfoTableSizeB + sizeOfEntryCode)
                -- Note: we need to allocate the conDesc string next to the info
                -- table, because on a 64-bit platform we reference this string
                -- with a 32-bit offset relative to the info table, so if we
@@ -416,9 +374,16 @@
         let cinfo = StgConInfoTable { conDesc = ex_ptr `plusPtr` fromIntegral sz
                                     , infoTable = obj }
         pokeConItbl wr_ptr ex_ptr cinfo
-        pokeArray0 0 (castPtr wr_ptr `plusPtr` fromIntegral sz) con_desc
+        BS.useAsCStringLen con_desc $ \(src, len) ->
+            copyBytes (castPtr wr_ptr `plusPtr` fromIntegral sz) src len
+        let null_off = fromIntegral sz + fromIntegral (BS.length con_desc)
+        poke (castPtr wr_ptr `plusPtr` null_off) (0 :: Word8)
         _flushExec sz ex_ptr -- Cache flush (if needed)
+#if defined(TABLES_NEXT_TO_CODE)
+        return (castPtrToFunPtr (ex_ptr `plusPtr` conInfoTableSizeB))
+#else
         return (castPtrToFunPtr ex_ptr)
+#endif
 
 foreign import ccall unsafe "allocateExec"
   _allocateExec :: CUInt -> Ptr (Ptr a) -> IO (Ptr a)
@@ -432,26 +397,5 @@
 wORD_SIZE :: Int
 wORD_SIZE = (#const SIZEOF_HSINT)
 
-fixedInfoTableSizeB :: Int
-fixedInfoTableSizeB = 2 * wORD_SIZE
-
-profInfoTableSizeB :: Int
-profInfoTableSizeB = (#size StgProfInfo)
-
-stdInfoTableSizeB :: Int
-stdInfoTableSizeB
-  = (if ghciTablesNextToCode then 0 else wORD_SIZE)
-  + (if rtsIsProfiled then profInfoTableSizeB else 0)
-  + fixedInfoTableSizeB
-
 conInfoTableSizeB :: Int
-conInfoTableSizeB = stdInfoTableSizeB + wORD_SIZE
-
-foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
-
-rtsIsProfiled :: Bool
-rtsIsProfiled = unsafeDupablePerformIO rtsIsProfiledIO /= 0
-
-cONSTR :: Int   -- Defined in ClosureTypes.h
-cONSTR = (#const CONSTR)
-#endif /* GHCI */
+conInfoTableSizeB = wORD_SIZE + itblSize
diff --git a/GHCi/Message.hs b/GHCi/Message.hs
--- a/GHCi/Message.hs
+++ b/GHCi/Message.hs
@@ -1,6 +1,5 @@
 {-# LANGUAGE GADTs, DeriveGeneric, StandaloneDeriving, ScopedTypeVariables,
-    GeneralizedNewtypeDeriving, ExistentialQuantification, RecordWildCards,
-    CPP #-}
+    GeneralizedNewtypeDeriving, ExistentialQuantification, RecordWildCards #-}
 {-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-orphans #-}
 
 -- |
@@ -23,13 +22,14 @@
   , Pipe(..), remoteCall, remoteTHCall, readPipe, writePipe
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import GHCi.RemoteTypes
-import GHCi.InfoTable (StgInfoTable)
 import GHCi.FFI
-import GHCi.TH.Binary ()
+import GHCi.TH.Binary () -- For Binary instances
 import GHCi.BreakArray
 
 import GHC.LanguageExtensions
+import GHC.Exts.Heap
 import GHC.ForeignSrcLang
 import GHC.Fingerprint
 import Control.Concurrent
@@ -41,12 +41,10 @@
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Lazy as LB
 import Data.Dynamic
-#if MIN_VERSION_base(4,10,0)
--- Previously this was re-exported by Data.Dynamic
 import Data.Typeable (TypeRep)
-#endif
 import Data.IORef
 import Data.Map (Map)
+import Foreign
 import GHC.Generics
 import GHC.Stack.CCS
 import qualified Language.Haskell.TH        as TH
@@ -63,6 +61,7 @@
 data Message a where
   -- | Exit the iserv process
   Shutdown :: Message ()
+  RtsRevertCAFs :: Message ()
 
   -- RTS Linker -------------------------------------------
 
@@ -109,7 +108,7 @@
    -> Int     -- non-ptr words
    -> Int     -- constr tag
    -> Int     -- pointer tag
-   -> [Word8] -- constructor desccription
+   -> ByteString -- constructor desccription
    -> Message (RemotePtr StgInfoTable)
 
   -- | Evaluate a statement
@@ -206,6 +205,18 @@
                    -> [RemoteRef (TH.Q ())]
                    -> Message (QResult ())
 
+  -- | Remote interface to GHC.Exts.Heap.getClosureData. This is used by
+  -- the GHCi debugger to inspect values in the heap for :print and
+  -- type reconstruction.
+  GetClosure
+    :: HValueRef
+    -> Message (GenClosure HValueRef)
+
+  -- | Evaluate something. This is used to support :force in GHCi.
+  Seq
+    :: HValueRef
+    -> Message (EvalResult ())
+
 deriving instance Show (Message a)
 
 
@@ -231,6 +242,7 @@
   LookupName :: Bool -> String -> THMessage (THResult (Maybe TH.Name))
   Reify :: TH.Name -> THMessage (THResult TH.Info)
   ReifyFixity :: TH.Name -> THMessage (THResult (Maybe TH.Fixity))
+  ReifyType :: TH.Name -> THMessage (THResult TH.Type)
   ReifyInstances :: TH.Name -> [TH.Type] -> THMessage (THResult [TH.Dec])
   ReifyRoles :: TH.Name -> THMessage (THResult [TH.Role])
   ReifyAnnotations :: TH.AnnLookup -> TypeRep
@@ -239,15 +251,17 @@
   ReifyConStrictness :: TH.Name -> THMessage (THResult [TH.DecidedStrictness])
 
   AddDependentFile :: FilePath -> THMessage (THResult ())
+  AddTempFile :: String -> THMessage (THResult FilePath)
   AddModFinalizer :: RemoteRef (TH.Q ()) -> THMessage (THResult ())
   AddCorePlugin :: String -> THMessage (THResult ())
   AddTopDecls :: [TH.Dec] -> THMessage (THResult ())
-  AddForeignFile :: ForeignSrcLang -> String -> THMessage (THResult ())
+  AddForeignFilePath :: ForeignSrcLang -> FilePath -> THMessage (THResult ())
   IsExtEnabled :: Extension -> THMessage (THResult Bool)
   ExtsEnabled :: THMessage (THResult [Extension])
 
   StartRecover :: THMessage ()
   EndRecover :: Bool -> THMessage ()
+  FailIfErrs :: THMessage (THResult ())
 
   -- | Indicates that this RunTH is finished, and the next message
   -- will be the result of RunTH (a QResult).
@@ -272,15 +286,19 @@
     8  -> THMsg <$> ReifyModule <$> get
     9  -> THMsg <$> ReifyConStrictness <$> get
     10 -> THMsg <$> AddDependentFile <$> get
-    11 -> THMsg <$> AddTopDecls <$> get
-    12 -> THMsg <$> (IsExtEnabled <$> get)
-    13 -> THMsg <$> return ExtsEnabled
-    14 -> THMsg <$> return StartRecover
-    15 -> THMsg <$> EndRecover <$> get
-    16 -> return (THMsg RunTHDone)
-    17 -> THMsg <$> AddModFinalizer <$> get
-    18 -> THMsg <$> (AddForeignFile <$> get <*> get)
-    _  -> THMsg <$> AddCorePlugin <$> get
+    11 -> THMsg <$> AddTempFile <$> get
+    12 -> THMsg <$> AddTopDecls <$> get
+    13 -> THMsg <$> (IsExtEnabled <$> get)
+    14 -> THMsg <$> return ExtsEnabled
+    15 -> THMsg <$> return StartRecover
+    16 -> THMsg <$> EndRecover <$> get
+    17 -> THMsg <$> return FailIfErrs
+    18 -> return (THMsg RunTHDone)
+    19 -> THMsg <$> AddModFinalizer <$> get
+    20 -> THMsg <$> (AddForeignFilePath <$> get <*> get)
+    21 -> THMsg <$> AddCorePlugin <$> get
+    22 -> THMsg <$> ReifyType <$> get
+    n -> error ("getTHMessage: unknown message " ++ show n)
 
 putTHMessage :: THMessage a -> Put
 putTHMessage m = case m of
@@ -295,15 +313,18 @@
   ReifyModule a               -> putWord8 8  >> put a
   ReifyConStrictness a        -> putWord8 9  >> put a
   AddDependentFile a          -> putWord8 10 >> put a
-  AddTopDecls a               -> putWord8 11 >> put a
-  IsExtEnabled a              -> putWord8 12 >> put a
-  ExtsEnabled                 -> putWord8 13
-  StartRecover                -> putWord8 14
-  EndRecover a                -> putWord8 15 >> put a
-  RunTHDone                   -> putWord8 16
-  AddModFinalizer a           -> putWord8 17 >> put a
-  AddForeignFile lang a       -> putWord8 18 >> put lang >> put a
-  AddCorePlugin a             -> putWord8 19 >> put a
+  AddTempFile a               -> putWord8 11 >> put a
+  AddTopDecls a               -> putWord8 12 >> put a
+  IsExtEnabled a              -> putWord8 13 >> put a
+  ExtsEnabled                 -> putWord8 14
+  StartRecover                -> putWord8 15
+  EndRecover a                -> putWord8 16 >> put a
+  FailIfErrs                  -> putWord8 17
+  RunTHDone                   -> putWord8 18
+  AddModFinalizer a           -> putWord8 19 >> put a
+  AddForeignFilePath lang a   -> putWord8 20 >> put lang >> put a
+  AddCorePlugin a             -> putWord8 21 >> put a
+  ReifyType a                 -> putWord8 22 >> put a
 
 
 data EvalOpts = EvalOpts
@@ -411,6 +432,22 @@
   }
 instance Show QState where show _ = "<QState>"
 
+-- Orphan instances of Binary for Ptr / FunPtr by conversion to Word64.
+-- This is to support Binary StgInfoTable which includes these.
+instance Binary (Ptr a) where
+  put p = put (fromIntegral (ptrToWordPtr p) :: Word64)
+  get = (wordPtrToPtr . fromIntegral) <$> (get :: Get Word64)
+
+instance Binary (FunPtr a) where
+  put = put . castFunPtrToPtr
+  get = castPtrToFunPtr <$> get
+
+-- Binary instances to support the GetClosure message
+instance Binary StgInfoTable
+instance Binary ClosureType
+instance Binary PrimType
+instance Binary a => Binary (GenClosure a)
+
 data Msg = forall a . (Binary a, Show a) => Msg (Message a)
 
 getMessage :: Get Msg
@@ -451,7 +488,11 @@
       31 -> Msg <$> return StartTH
       32 -> Msg <$> (RunModFinalizers <$> get <*> get)
       33 -> Msg <$> (AddSptEntry <$> get <*> get)
-      _  -> Msg <$> (RunTH <$> get <*> get <*> get <*> get)
+      34 -> Msg <$> (RunTH <$> get <*> get <*> get <*> get)
+      35 -> Msg <$> (GetClosure <$> get)
+      36 -> Msg <$> (Seq <$> get)
+      37 -> Msg <$> return RtsRevertCAFs
+      _  -> error $ "Unknown Message code " ++ (show b)
 
 putMessage :: Message a -> Put
 putMessage m = case m of
@@ -490,6 +531,9 @@
   RunModFinalizers a b        -> putWord8 32 >> put a >> put b
   AddSptEntry a b             -> putWord8 33 >> put a >> put b
   RunTH st q loc ty           -> putWord8 34 >> put st >> put q >> put loc >> put ty
+  GetClosure a                -> putWord8 35 >> put a
+  Seq a                       -> putWord8 36 >> put a
+  RtsRevertCAFs               -> putWord8 37
 
 -- -----------------------------------------------------------------------------
 -- Reading/writing messages
diff --git a/GHCi/ObjLink.hs b/GHCi/ObjLink.hs
--- a/GHCi/ObjLink.hs
+++ b/GHCi/ObjLink.hs
@@ -25,6 +25,7 @@
   , findSystemLibrary
   )  where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import GHCi.RemoteTypes
 import Control.Exception (throwIO, ErrorCall(..))
 import Control.Monad    ( when )
diff --git a/GHCi/RemoteTypes.hs b/GHCi/RemoteTypes.hs
--- a/GHCi/RemoteTypes.hs
+++ b/GHCi/RemoteTypes.hs
@@ -17,6 +17,7 @@
   , unsafeForeignRefToRemoteRef, finalizeForeignRef
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Control.DeepSeq
 import Data.Word
 import Foreign hiding (newForeignPtr)
diff --git a/GHCi/ResolvedBCO.hs b/GHCi/ResolvedBCO.hs
--- a/GHCi/ResolvedBCO.hs
+++ b/GHCi/ResolvedBCO.hs
@@ -6,6 +6,7 @@
   , isLittleEndian
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import SizedSeq
 import GHCi.RemoteTypes
 import GHCi.BreakArray
diff --git a/GHCi/Run.hs b/GHCi/Run.hs
--- a/GHCi/Run.hs
+++ b/GHCi/Run.hs
@@ -12,6 +12,7 @@
   ( run, redirectInterrupts
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import GHCi.CreateBCO
 import GHCi.InfoTable
 import GHCi.FFI
@@ -31,8 +32,9 @@
 import Data.ByteString (ByteString)
 import qualified Data.ByteString.Unsafe as B
 import GHC.Exts
+import GHC.Exts.Heap
 import GHC.Stack
-import Foreign
+import Foreign hiding (void)
 import Foreign.C
 import GHC.Conc.Sync
 import GHC.IO hiding ( bracket )
@@ -42,9 +44,13 @@
 -- -----------------------------------------------------------------------------
 -- Implement messages
 
+foreign import ccall "revertCAFs" rts_revertCAFs  :: IO ()
+        -- Make it "safe", just in case
+
 run :: Message a -> IO a
 run m = case m of
   InitLinker -> initObjLinker RetainCAFs
+  RtsRevertCAFs -> rts_revertCAFs
   LookupSymbol str -> fmap toRemotePtr <$> lookupSymbol str
   LookupClosure str -> lookupClosure str
   LoadDLL str -> loadDLL str
@@ -86,6 +92,10 @@
   MkConInfoTable ptrs nptrs tag ptrtag desc ->
     toRemotePtr <$> mkConInfoTable ptrs nptrs tag ptrtag desc
   StartTH -> startTH
+  GetClosure ref -> do
+    clos <- getClosureData =<< localRef ref
+    mapM (\(Box x) -> mkRemoteRef (HValue x)) clos
+  Seq ref -> tryEval (void $ evaluate =<< localRef ref)
   _other -> error "GHCi.Run.run"
 
 evalStmt :: EvalOpts -> EvalExpr HValueRef -> IO (EvalStatus [HValueRef])
@@ -298,7 +308,12 @@
 resetStepFlag :: IO ()
 resetStepFlag = poke stepFlag 0
 
-type BreakpointCallback = Int# -> Int# -> Bool -> HValue -> IO ()
+type BreakpointCallback
+     = Int#    -- the breakpoint index
+    -> Int#    -- the module uniq
+    -> Bool    -- exception?
+    -> HValue  -- the AP_STACK, or exception
+    -> IO ()
 
 foreign import ccall "&rts_breakpoint_io_action"
    breakPointIOAction :: Ptr (StablePtr BreakpointCallback)
diff --git a/GHCi/Signals.hs b/GHCi/Signals.hs
--- a/GHCi/Signals.hs
+++ b/GHCi/Signals.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE CPP #-}
 module GHCi.Signals (installSignalHandlers) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Control.Concurrent
 import Control.Exception
 import System.Mem.Weak  ( deRefWeak )
diff --git a/GHCi/StaticPtrTable.hs b/GHCi/StaticPtrTable.hs
--- a/GHCi/StaticPtrTable.hs
+++ b/GHCi/StaticPtrTable.hs
@@ -3,6 +3,7 @@
 
 module GHCi.StaticPtrTable ( sptAddEntry ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Data.Word
 import Foreign
 import GHC.Fingerprint
diff --git a/GHCi/TH.hs b/GHCi/TH.hs
--- a/GHCi/TH.hs
+++ b/GHCi/TH.hs
@@ -1,5 +1,5 @@
 {-# LANGUAGE ScopedTypeVariables, StandaloneDeriving, DeriveGeneric,
-    TupleSections, RecordWildCards, InstanceSigs #-}
+    TupleSections, RecordWildCards, InstanceSigs, CPP #-}
 {-# OPTIONS_GHC -fno-warn-name-shadowing #-}
 
 -- |
@@ -91,6 +91,7 @@
     compiler/typecheck/TcSplice.hs
 -}
 
+import Prelude -- See note [Why do we import Prelude here?]
 import GHCi.Message
 import GHCi.RemoteTypes
 import GHC.Serialized
@@ -105,6 +106,7 @@
 import qualified Data.ByteString.Lazy as LB
 import Data.Data
 import Data.Dynamic
+import Data.Either
 import Data.IORef
 import Data.Map (Map)
 import qualified Data.Map as M
@@ -142,7 +144,9 @@
     do (m', s')  <- runGHCiQ m s
        (a,  s'') <- runGHCiQ (f m') s'
        return (a, s'')
+#if !MIN_VERSION_base(4,13,0)
   fail = Fail.fail
+#endif
 
 instance Fail.MonadFail GHCiQ where
   fail err  = GHCiQ $ \s -> throwIO (GHCiQException s err)
@@ -169,16 +173,17 @@
   qReport isError msg = ghcCmd (Report isError msg)
 
   -- See Note [TH recover with -fexternal-interpreter] in TcSplice
-  qRecover (GHCiQ h) (GHCiQ a) = GHCiQ $ \s -> (do
+  qRecover (GHCiQ h) a = GHCiQ $ \s -> mask $ \unmask -> do
     remoteTHCall (qsPipe s) StartRecover
-    (r, s') <- a s
-    remoteTHCall (qsPipe s) (EndRecover False)
-    return (r,s'))
-      `catch`
-       \GHCiQException{} -> remoteTHCall (qsPipe s) (EndRecover True) >> h s
+    e <- try $ unmask $ runGHCiQ (a <* ghcCmd FailIfErrs) s
+    remoteTHCall (qsPipe s) (EndRecover (isLeft e))
+    case e of
+      Left GHCiQException{} -> h s
+      Right r -> return r
   qLookupName isType occ = ghcCmd (LookupName isType occ)
   qReify name = ghcCmd (Reify name)
   qReifyFixity name = ghcCmd (ReifyFixity name)
+  qReifyType name = ghcCmd (ReifyType name)
   qReifyInstances name tys = ghcCmd (ReifyInstances name tys)
   qReifyRoles name = ghcCmd (ReifyRoles name)
 
@@ -195,8 +200,9 @@
   qReifyConStrictness name = ghcCmd (ReifyConStrictness name)
   qLocation = fromMaybe noLoc . qsLocation <$> getState
   qAddDependentFile file = ghcCmd (AddDependentFile file)
+  qAddTempFile suffix = ghcCmd (AddTempFile suffix)
   qAddTopDecls decls = ghcCmd (AddTopDecls decls)
-  qAddForeignFile str lang = ghcCmd (AddForeignFile str lang)
+  qAddForeignFilePath lang fp = ghcCmd (AddForeignFilePath lang fp)
   qAddModFinalizer fin = GHCiQ (\s -> mkRemoteRef fin >>= return . (, s)) >>=
                          ghcCmd . AddModFinalizer
   qAddCorePlugin str = ghcCmd (AddCorePlugin str)
@@ -260,7 +266,7 @@
 runTHQ
   :: Binary a => Pipe -> RemoteRef (IORef QState) -> Maybe TH.Loc -> TH.Q a
   -> IO ByteString
-runTHQ pipe@Pipe{..} rstate mb_loc ghciq = do
+runTHQ pipe rstate mb_loc ghciq = do
   qstateref <- localRef rstate
   qstate <- readIORef qstateref
   let st = qstate { qsLocation = mb_loc, qsPipe = pipe }
diff --git a/GHCi/TH/Binary.hs b/GHCi/TH/Binary.hs
--- a/GHCi/TH/Binary.hs
+++ b/GHCi/TH/Binary.hs
@@ -1,5 +1,4 @@
 {-# OPTIONS_GHC -fno-warn-orphans #-}
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE PolyKinds #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -8,14 +7,13 @@
 -- This module is full of orphans, unfortunately
 module GHCi.TH.Binary () where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Data.Binary
 import qualified Data.ByteString as B
+import qualified Data.ByteString.Internal as B
 import GHC.Serialized
 import qualified Language.Haskell.TH        as TH
 import qualified Language.Haskell.TH.Syntax as TH
-#if !MIN_VERSION_base(4,10,0)
-import Data.Typeable
-#endif
 -- Put these in a separate module because they take ages to compile
 
 instance Binary TH.Loc
@@ -76,15 +74,9 @@
     put (Serialized tyrep wds) = put tyrep >> put (B.pack wds)
     get = Serialized <$> get <*> (B.unpack <$> get)
 
--- Typeable and related instances live in binary since GHC 8.2
-#if !MIN_VERSION_base(4,10,0)
-instance Binary TyCon where
-    put tc = put (tyConPackage tc) >> put (tyConModule tc) >> put (tyConName tc)
-    get = mkTyCon3 <$> get <*> get <*> get
-
-instance Binary TypeRep where
-    put type_rep = put (splitTyConApp type_rep)
-    get = do
-        (ty_con, child_type_reps) <- get
-        return (mkTyConApp ty_con child_type_reps)
-#endif
+instance Binary TH.Bytes where
+   put (TH.Bytes ptr off sz) = put bs
+      where bs = B.PS ptr (fromIntegral off) (fromIntegral sz)
+   get = do
+      B.PS ptr off sz <- get
+      return (TH.Bytes ptr (fromIntegral off) (fromIntegral sz))
diff --git a/Setup.hs b/Setup.hs
deleted file mode 100644
--- a/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/SizedSeq.hs b/SizedSeq.hs
--- a/SizedSeq.hs
+++ b/SizedSeq.hs
@@ -8,6 +8,7 @@
   , sizeSS
   ) where
 
+import Prelude -- See note [Why do we import Prelude here?]
 import Control.DeepSeq
 import Data.Binary
 import Data.List
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+## 8.2.2 Nov 2017
+
+  * Bundled with GHC 8.2.2
+
 ## 8.0.1  *Feb 2016*
 
   * Bundled with GHC 8.0.1
diff --git a/ghci.cabal b/ghci.cabal
--- a/ghci.cabal
+++ b/ghci.cabal
@@ -1,16 +1,17 @@
+cabal-version:  >=1.10
 name:           ghci
-version:        8.4.4
+version:        8.10.2
+
 license:        BSD3
 license-file:   LICENSE
 category:       GHC
 maintainer:     ghc-devs@haskell.org
-bug-reports:    https://ghc.haskell.org/trac/ghc/newticket
+bug-reports:    https://gitlab.haskell.org/ghc/ghc/issues/new
 synopsis:       The library supporting GHC's interactive interpreter
 description:
             This library offers interfaces which mediate interactions between the
             @ghci@ interactive shell and @iserv@, GHC's out-of-process interpreter
             backend.
-cabal-version:  >=1.10
 build-type:     Simple
 extra-source-files: changelog.md
 
@@ -21,11 +22,12 @@
 
 source-repository head
     type:     git
-    location: http://git.haskell.org/ghc.git
+    location: https://gitlab.haskell.org/ghc/ghc.git
     subdir:   libraries/ghci
 
 library
     default-language: Haskell2010
+    default-extensions: NoImplicitPrelude
     other-extensions:
         BangPatterns
         CPP
@@ -44,7 +46,7 @@
         UnboxedTuples
 
     if flag(ghci)
-        CPP-Options: -DGHCI
+        CPP-Options: -DHAVE_INTERNAL_INTERPRETER
         exposed-modules:
             GHCi.Run
             GHCi.CreateBCO
@@ -52,6 +54,8 @@
             GHCi.Signals
             GHCi.TH
 
+    include-dirs: 
+
     exposed-modules:
         GHCi.BreakArray
         GHCi.BinaryArray
@@ -66,15 +70,16 @@
 
     Build-Depends:
         array            == 0.5.*,
-        base             >= 4.8 && < 4.12,
+        base             >= 4.8 && < 4.15,
         binary           == 0.8.*,
         bytestring       == 0.10.*,
-        containers       == 0.5.*,
+        containers       >= 0.5 && < 0.7,
         deepseq          == 1.4.*,
         filepath         == 1.4.*,
-        ghc-boot         == 8.4.4,
-        ghc-boot-th      == 8.4.4,
-        template-haskell == 2.13.*,
+        ghc-boot         == 8.10.2,
+        ghc-boot-th      == 8.10.2,
+        ghc-heap         == 8.10.2,
+        template-haskell == 2.16.*,
         transformers     == 0.5.*
 
     if !os(windows)
