Compiling the code fragment appended at the end of this
message, ghc-2.03 fails with the following output:
Glasgow Haskell Compiler, version 2.03, for Haskell 1.4
panic! (the `impossible' happened):
tcLookupTyVar:a_r6v
Please report it as a compiler bug to [EMAIL PROTECTED]
Hope this helps.
Regards,
Marc
************************************************************************
> module Group( Group ) where
> import qualified Prelude( Num(..) )
> import Prelude hiding ( Num(..) )
> class Group a where
> fromInteger :: Integer -> a
> (-) :: a -> a -> a
> negate :: a -> a
> negate p
> = (0::a) - p
