Hi Paul,
On Sun, Jan 28, 2007 at 12:49:44PM +0300, Paul wrote:
>
> Chasing modules from: hask1.hs
> Compiling Main ( hask1.hs, hask1.o )
> ghc-6.4: panic! (the `impossible' happened, GHC version 6.4):
> ds_app_type Main.Tree{tc r16z} [a{tv a1a9}]
>
> Please report it as a compiler bug to [email protected],
> or http://sourceforge.net/projects/ghc/.
Thanks for the report. I think the problem is fixed in newer versions of
GHC (I've tried 6.4.2 and 6.6), which give the error
hask1.hs:24:1:
Class `Tree' used as a type
In the class declaration for `Tree'
when using "data Node ..." and
Multiple declarations of `Main.Tree'
Declared at: hask1.hs:12:5
hask1.hs:14:6
when using "data Tree ...".
Thanks
Ian
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