RE: GHC 6.5 (Visual Haskell) bug with wxHaskell

On 17 October 2005 04:50, Piotr Wilkin wrote:

> I installed the alpha version of Visual Haskell and wanted to try to
> add wxHaskell to the package list. I compiled wxHaskell from source,
> using the ghc, ghc-pkg and Haddock from the Visual Haskell
> distribution. The wx and wxcore packages are visible when I use
> ghc-pkg list (and they're visible in add references in Visual Studio),
> but whenever I try to use them (either by adding them as references in
> VS or trying to compile an example using ghc-6.5 under CygWin, I get
> the following error:
> 
> $ ghc -package wx helloworld HelloWorld.hs
> <no location info>:<no location info>:
>     ghc.exe: panic! (the 'impossible' happened, GHC version 6.5):
>              unknown exception
> 
> Is this one of those "hidden bugs" due to the bundled version being a
> prerelease, or am I missing something obvious?

There's a bug in the error message, and I'm guessing it's the same as a
bug I fixed recently, and that the error message should be an "unknown
package".

Can you try with -v and send us the output, also the output from
'ghc-pkg list', and 'ghc-pkg describe wxcore', 'ghc-pkg describe wx'.
All with the versions of these tools that came with Visual Haskell, of
course.

Cheers,
        Simon