primRepHint:VoidRep

Compiling this module:

module Q where 

import GHC.Base

type World__ = State# RealWorld

foreign import ccall unsafe "putwchar" f :: World__ -> Char# -> World__

with ghc -fglasgow-exts -O Q.hs panics:

ghc-6.6: panic! (the 'impossible' happened)
  (GHC version 6.6 for x86_64-unknown-linux):
        primRepHint:VoidRep

It looks like we need a !VoidHint if we want to support this.

Reported by John Meacham in http://www.haskell.org/pipermail/glasgow-haskell-users/2006-November/011658.html

Trac metadata

Trac field	Value
Version	6.6
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (FFI)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown
Architecture	Unknown