id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3450,Parser error on {-# LANGUAGE - #-},monoidal,,"Create a single-line file x.hs with contents

{-# LANGUAGE -FlexibleInstances #-}

And run ghci x.hs.

GHCi, version 6.10.4: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
ghc: panic! (the 'impossible' happened)
  (GHC version 6.10.4 for i386-unknown-linux):
        getOptions'.parseLanguage(2) went past eof token

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug



If the dash is removed,
{-# LANGUAGE FlexibleInstances #-}
the file parses properly.",bug,closed,normal,,Compiler (Parser),6.10.4,fixed,,,Linux,Unknown/Multiple,,Unknown,,,,