id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
1757	Simple example crashes GHC	guest		"This file:

{{{
class Collects ce where
  type Elem ce
  empty  :: ce
  insert :: Elem ce -> ce -> ce
  member :: Elem ce -> ce -> Bool
  toList :: ce -> [Elem ce]
}}}

and call GHC as: ghci -fglasgow-exts Abc gives:

{{{
GHCi, version 6.9.20070927: http://www.haskell.org/ghc/  :? for help
Loading package base ... linking ... done.
[1 of 1] Compiling Main             ( Abc.hs, interpreted )
ghc-6.9.20070927: panic! (the 'impossible' happened)
  (GHC version 6.9.20070927 for i386-unknown-linux):
        check_tau_type main:Main.Elem{tc rlp} ce{tv alz} [tv]

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

}}}


"	bug	closed	normal		Compiler	6.9	duplicate		iampure@…	Unknown/Multiple	Unknown/Multiple		Unknown