GHC doesn't like its own type?

[Simon Marlow]

> The second odd circumstance is best illustrated by the following
> transcript. Assume that /tmp/a.lhs is the text of the previous message
> as it was posted:
> 
>  $  ghci -fglasgow-exts /tmp/a.lhs
>  GHC Interactive, version 5.04.1, for Haskell 98.
>  Loading package base ... linking ... done.
>  Loading package haskell98 ... linking ... done.
>  Compiling Main             ( /tmp/a.lhs, interpreted )
> 
>  /tmp/a.lhs:76: Warning: No 'main' defined in module Main
>  Ok, modules loaded: Main.
>  *Main> let x = \f -> fapp f (('a','b'),('c',('d','e')))
>  Bus error (core dumped)
> 
> Incidentally, if I enter
> > x = \f -> fapp f (('a','b'),('c',('d','e')))
> into /tmp/a.lhs and load the file into GHCi, I get
> 
> ghc-5.04.1: panic! (the `impossible' happened, GHC version 5.04.1):
>         rdrNameModule zddFApp

These are both instances of the same bug, which Simon P.J. fixed a couple of months ago.  Unfortunately the fix isn't in the latest
5.04.3 release, but it will be in the next major release.

Cheers,
	Simon