A bug in hugs

[Sigbjorn Finne]

Hi,

thanks for reporting this; sorry for taking so long to
reply. The current version of Hugs now handles this error
condition a little bit better:

Prelude> :l Bug.hs
Reading file "Bug.hs":
ERROR "Bug.hs":3 - Undefined type variable "m"

--sigbjorn

----- Original Message -----
From: Deling Ren
To: hugs-bugs@haskell.org
Sent: Friday, February 08, 2002 02:07
Subject: A bug in hugs


Hugs version: Dec 2001. Platform: Windows. Both WinHugs and command line
hugs have the same bug.

start hugs with -98 option and try the following program:

class Monad m => ExMonad where
    raise :: String-> m a

instead of reporting an error, an internal error is raised:

INTERNAL ERROR: inheritFundeps - predicate failed to match it's own head!

Regards.
Deling