panic in ghci for lseek ffi import statement

{-# OPTIONS_GHC -fglasgow-exts #-}

import System.Posix.Types
import Foreign.C

foreign import ccall safe "unistd.h lseek" foo :: CInt -> COff -> CInt -> IO COff

{-
  save as bug.hs, then run ghci bug.hs
  my results:
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.4.2, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base-1.0 ... linking ... done.
Compiling Main             ( bug.hs, interpreted )
ghc-6.4.2: panic! (the `impossible' happened, GHC version 6.4.2):
        ByteCodeFFI.mkMarshalCode_wrk(x86) L_

bonus information:
- uname:
Linux nora 2.6.15-gentoo-r1 #9 PREEMPT Sun Feb 5 02:47:05 CET 2006 i686 AMD Athlon(tm) 64 Processor 3200+ GNU/Linux

- gcc:
Reading specs from /usr/lib/gcc/i386-pc-linux-gnu/3.4.6/specs
Configured with: /var/tmp/portage/gcc-3.4.6-r1/work/gcc-3.4.6/configure --prefix=/usr --bindir=/usr/i386-pc-linux-gnu/gcc-bin/3.4.6 --includedir=/usr/lib/gcc/i386-pc-linux-gnu/3.4.6/include --datadir=/usr/share/gcc-data/i386-pc-linux-gnu/3.4.6 --mandir=/usr/share/gcc-data/i386-pc-linux-gnu/3.4.6/man --infodir=/usr/share/gcc-data/i386-pc-linux-gnu/3.4.6/info --with-gxx-include-dir=/usr/lib/gcc/i386-pc-linux-gnu/3.4.6/include/g++-v3 --host=i386-pc-linux-gnu --build=i386-pc-linux-gnu --disable-altivec --enable-nls --without-included-gettext --with-system-zlib --disable-checking --disable-werror --disable-libunwind-exceptions --disable-multilib --disable-libgcj --enable-languages=c,c++,f77 --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9)

-}

Trac metadata

Trac field	Value
Version	6.4.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
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