id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
1804	Panic: applyTypeToArgs with -O	dons		"My HWN publishing program,

    http://www.galois.com/~dons/publish.hs

elicits a panic from a ghc 6.8 snapshot from Sep 9, when compiled with -O:

{{{
$ ghc --make -O publish.hs -o publish -no-recomp
[1 of 1] Compiling Main             ( publish.hs, publish.o )
ghc-6.9.20070916: panic! (the 'impossible' happened)
  (GHC version 6.9.20070916 for x86_64-unknown-openbsd):
	applyTypeToArgs
    unix-2.0:System.Posix.Signals.a37{v rjv} [gid]
      (unix-2.0:System.Posix.Signals.a25{v rju} [gid]
       `cast` (base:GHC.Prim.sym{(w) tc 34v}
		 (base:Foreign.C.Types.:CoCInt{tc rjt})
	       :: <pred>base:GHC.Int.Int32{tc 3V}
			  ~
			<nt>base:Foreign.C.Types.CInt{tc r9e}))
      unix-2.0:System.Posix.Signals.Ignore{v rjs} [gid]
      (base:Data.Maybe.Nothing{v r4U} [gid]
	 @ <nt>unix-2.0:System.Posix.Signals.SignalSet{tc rjr})
      eta{v a3Uh} [lid]
    (# base:GHC.Prim.State#{(w) tc 32q}
	 base:GHC.Prim.RealWorld{(w) tc 31E},
       base:GHC.Base.(){(w) tc 40} #)

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
}}}"	bug	closed	normal		Compiler (Type checker)	6.8	fixed		dons@…	OpenBSD	x86_64 (amd64)		Unknown