diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+0.1.37:
+	* Fix completion listing deferred names
+
 0.1.36:
 	* Fix handling of unicode for type/info queries
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -21,6 +21,15 @@
 `C-c C-k` | Clear REPL
 `C-c C-z` | Switch to and from the REPL
 
+## Install requirements
+
+Make sure you have this package installed on Linux:
+
+    libtinfo-dev
+
+(People on other platforms please contribute the equivalent
+dependency.)
+
 ## Enabling intero
 
 To enable `intero` in all `haskell-mode` buffers by default, enable
@@ -46,7 +55,6 @@
 `intero-whitelist`. In other words, whitelist entries take
 precedence. You can therefore blacklist `/` to disable `intero` in all
 projects unless they are whitelisted.
-
 
 ## Intero support for other editors and IDEs
 
diff --git a/elisp/intero.el b/elisp/intero.el
--- a/elisp/intero.el
+++ b/elisp/intero.el
@@ -1416,9 +1416,12 @@
              'face 'font-lock-comment-face))
     (let* ((script-buffer
             (with-current-buffer (find-file-noselect (intero-make-temp-file "intero-script"))
+              ;; Commented out this line due to this bug:
+              ;; https://github.com/chrisdone/intero/issues/569
+              ;; GHC 8.4.3 has some bug causing a panic on GHCi.
+              ;; :set -fdefer-type-errors
               (insert ":set prompt \"\"
 :set -fbyte-code
-:set -fdefer-type-errors
 :set -fdiagnostics-color=never
 :set prompt \"\\4 \"
 ")
@@ -2243,6 +2246,8 @@
 We don't know why it failed. Please read the above output and try
 installing manually. If that doesn't work, report this as a
 problem.
+
+Guess: You might need the \"tinfo\" package, e.g. libtinfo-dev.
 
 WHAT TO DO NEXT
 
diff --git a/intero.cabal b/intero.cabal
--- a/intero.cabal
+++ b/intero.cabal
@@ -1,7 +1,7 @@
 name:
   intero
 version:
-  0.1.36
+  0.1.37
 synopsis:
   Complete interactive development program for Haskell
 license:
diff --git a/src/GhciFind.hs b/src/GhciFind.hs
--- a/src/GhciFind.hs
+++ b/src/GhciFind.hs
@@ -123,8 +123,13 @@
           do var <- spaninfoVar si
              let str = showppr df var
              if isPrefixOf prefix str
-                then Just str
-                else Nothing
+               then case getSrcLoc (getName var) of
+                      RealSrcLoc {} -> Just str
+                      -- Probably an internally generated name. Ignore it:
+                      -- See here: https://github.com/chrisdone/intero/issues/531
+                      -- We ignore defered-scope-error names like foo_a8s76
+                      UnhelpfulLoc {} -> Nothing
+               else Nothing
 
 -- | Find any uses of the given identifier in the codebase.
 findNameUses :: (GhcMonad m)
diff --git a/src/InteractiveUI.hs b/src/InteractiveUI.hs
--- a/src/InteractiveUI.hs
+++ b/src/InteractiveUI.hs
@@ -894,16 +894,16 @@
     st <- getFileStatus name
     me <- getRealUserID
     if fileOwner st /= me then do
-        putStrLn $ "WARNING: " ++ name ++ " is owned by someone else, IGNORING!"
-        return False
+        putStrLn $ "WARNING: " ++ name ++ " is owned by someone else!"
+        return True
      else do
         let mode = System.Posix.fileMode st
         if (groupWriteMode == (mode `intersectFileModes` groupWriteMode))
             || (otherWriteMode == (mode `intersectFileModes` otherWriteMode))
             then do
                 putStrLn $ "*** WARNING: " ++ name ++
-                           " is writable by someone else, IGNORING!"
-                return False
+                           " is writable by someone else!"
+                return True
             else return True
 #endif
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -106,7 +106,8 @@
    hSetBuffering stderr LineBuffering
    GHC.defaultErrorHandler defaultFatalMessager defaultFlushOut $ do
     -- 1. extract the -B flag from the args
-    argv00 <- getArgs
+    argv00 <- fmap (filter (/= "-traditional"))
+                   getArgs
     if elem "--version" argv00
        then do putStrLn ("Intero " ++ Data.Version.showVersion Paths_intero.version)
                exitSuccess
diff --git a/src/test/Main.hs b/src/test/Main.hs
--- a/src/test/Main.hs
+++ b/src/test/Main.hs
@@ -411,7 +411,19 @@
                 (["\"sort\"", "\"sortBy\""])))
   describe
     "Completion in module context"
-    (do it
+    (do issue
+          ":complete-at for defered scope names"
+          "https://github.com/chrisdone/intero/issues/531"
+          (atFile
+             ":complete-at"
+             "X.hs"
+             -- All these type annotations are required for GHC 8.6.3
+             -- to accept the input without error.
+             "{-# OPTIONS -fdefer-type-errors #-}\nmodule X where\ng a = fiiila (filu :: Char) a (fi :: Int)\n where fiiila _ _ _ = 123"
+             (2, 14, 2, 17, "fi")
+             lines
+             ["fiiila", "filter"])
+        it
           ":complete-at for put*"
           (atFile
              ":complete-at"