the `impossible' happened

Skipping  Version          ( ./Version.hs, 
dist/build/./fcq-www.cgi-tmp/Version.o )
Skipping  ChangeLog        ( ./ChangeLog.hs, 
dist/build/./fcq-www.cgi-tmp/ChangeLog.o )
Compiling Main             ( fcq-www.hs, dist/build/./fcq-www.cgi-tmp/Main.o )
/home/frederik/arch/i386/lib/WASH-CGI-1.4.37/ghc-6-4/import/Cookie.hi :
  Could not find module `StateItem':
    it is not a module in the current program, or in any known package.
ghc-6.4: panic! (the `impossible' happened, GHC version 6.4):
        forkM Declaration for check{v}

Please report it as a compiler bug to glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.

-- 
http://ofb.net/~frederik/