Internal error from invalid syntax

[Neil Mitchell]

Hi Neil,

I reported it in the bug tracker:
http://hackage.haskell.org/trac/hugs/ticket/91 - at least this way it
won't get forgotten.

Thanks

Neil

On Sun, Apr 12, 2009 at 7:24 PM, Neil Turton
<neilt+hugs at chiark.greenend.org.uk> wrote:
> I wrote the following haskell program and hugs reported an internal
> compiler error when I tried to load it.  The syntax is invalid but I
> would expect a sensible error message rather than the internal error
> which I got.
>
> Cheers, Neil.
>
> falcon:tmp$ cat foo.hs
> class Foo x where
>    foo :: x
>
> instance Foo () where
>    foo ?
> falcon:tmp$ hugs foo.hs
> __   __ __  __  ____   ___      _________________________________________
> ||   || ||  || ||  || ||__      Hugs 98: Based on the Haskell 98 standard
> ||___|| ||__|| ||__||  __||     Copyright (c) 1994-2005
> ||---||         ___||           World Wide Web: http://haskell.org/hugs
> ||   ||                         Bugs: http://hackage.haskell.org/trac/hugs
> ||   || Version: September 2006 _________________________________________
>
> Haskell 98 mode: Restart with command line option -98 to enable extensions
>
> INTERNAL ERROR: parseInput
> Please report this Hugs bug to http://hackage.haskell.org/trac/hugs
> Hugs>
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