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 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> _______________________________________________ Hugs-Bugs mailing list Hugs-Bugs@haskell.org http://www.haskell.org/mailman/listinfo/hugs-bugs