id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
1680	Attempting to do foreign import with unboxed tuple return type causes GHC panic	sorear	igloo	"{{{
stefan@stefans:/tmp$ ghc -ddump-asm -fglasgow-exts X.hs
ghc-6.7.20070829: panic! (the 'impossible' happened)
  (GHC version 6.7.20070829 for i386-unknown-linux):
resultWrapper
    (# base:GHC.Prim.Int#{(w) tc 3G},
       base:GHC.Prim.Int#{(w) tc 3G},
       base:GHC.Prim.Int#{(w) tc 3G} #)

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

stefan@stefans:/tmp$ cat X.hs
module X where
import GHC.Exts
foreign import ccall unsafe ""foo"" foo :: Int# -> Int# -> Int# -> (# Int# , Int# , Int# #)
stefan@stefans:/tmp$ 
}}}

6.6.1 and 6.4.2 are also affected."	merge	closed	normal	6.8.1	Compiler (FFI)	6.7	fixed		sorear	Linux	x86		Unknown	ccfail002