Parser panic: Non-exhaustive patterns in case

[Jan de Wit]

Hello,

In GHC 5.02 on Sun Solaris (binary package), running 'ghc-5.02 -c
-fglasgow-exts Test.hs' and Test.hs containing the following code:
> module Test where
> bimapGRose __ff __a = ((to ((bimapEP epGRose) epGRose)) 
>     ((bimapGRose__ __ff) __a))

Gives the following panic message:
| ghc-5.02: panic! (the `impossible' happened, GHC version 5.02):
|        parser/Parser.hs:5394: Non-exhaustive patterns in case
|
| Please report it as a compiler bug to glasgow-haskell-bugs at haskell.org,
| or http://sourceforge.net/projects/ghc/.

The problem does not occur when '-fglasgow-exts' is omitted, but we need
the universally quantified types...

The problem also occurs in 5.00.1 and 4.08.1, with line numbers 5292 and
10787 respectively.

I've tried to submit to the SourceForge bug list as well, but that doesn't
seem to be working for me...

All the best,

Jan de Wit