Bug report.

[Simon Marlow]

On 25 March 2004 09:06, MR K P SCHUPKE wrote:

> Started getting:
> 
> ghc-6.2.1.20040313: panic! (the `impossible' happened, GHC version
>         6.2.1.20040313): mkTyVar a1 {- tv a75q -}
> 
> Please report it as a compiler bug to
> glasgow-haskell-bugs at haskell.org, 
> or http://sourceforge.net/projects/ghc/.
> 
> today... definitely a but to do with class inference, as it started
> appearing aftyer changing some instance constraints and fundeps on
> classes. 
> 
> Can't really be a lot more specific as code is big. Let me know if
> you want 
> me to produce a small code extract which triggers it.

I'm not sure if anyone followed up on this... if you're still having the
problem, could you send us some code to reproduce?

Cheers,
	Simon