#3066: Crash with bogus FFI declaration
-------------------------------+--------------------------------------------
Reporter: simonpj | Owner: simonpj
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.1
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Ben Franksen finds this:
{{{
{-# LANGUAGE ForeignFunctionInterface, RankNTypes #-}
import Foreign
type X u = Ptr ()
foreign import ccall bla :: (forall u. X u) -> IO ()
}}}
I know of course that I must not use fancy types in foreign imports. I
forgot for a moment and instead of an error message got:
{{{
b...@sarun> ghci Bug3
GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main ( Bug3.hs, interpreted )
ghc: panic! (the 'impossible' happened)
(GHC version 6.10.1 for i386-unknown-linux):
unboxArg:
Bug3.hs:4:0-51 forall u{tv aht} [tv].
main:Main.X{tc rhp} u{tv aht} [tv]
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3066>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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