id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
6060,the 'impossible' happened,lerkok,,"
{{{
$ cat bug.hs 
foo = do let bad = [True | x <- [] | y <- []]
$ ghc bug.hs 
[1 of 1] Compiling Main             ( bug.hs, bug.o )

bug.hs:1:10:ghc: panic! (the 'impossible' happened)
  (GHC version 7.4.1 for x86_64-apple-darwin):
	Prelude.undefined
}}}
",bug,closed,normal,7.6.1,Compiler,7.4.1,fixed,,,Unknown/Multiple,Unknown/Multiple,Compile-time crash,Unknown,rename/should_fail/T6060,,,