Re: Error importing Control.Monad (liftM2) with newtype

Malcolm Wallace <[email protected]> Mon, 11 Apr 2005 15:27:27 +0100
Newsgroups	gmane.comp.lang.haskell.nhc.bugs
Organization	Dept of Computer Science, University of York
Message-ID	<[email protected]>
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Ian Lynagh <[email protected]> writes:

> This happens with both nhc98 1.16 and 1.18:
> 
> $ cat Q.hs
> module Q () where
> import Control.Monad (liftM2)
> newtype A a = A a
> 
> $ nhc98 -c Q.hs
> nhc98comp: isRealData InfoClass 1 Prelude.Monad IEnone \/ b . (1 b)
> [38,39,40,41] [] [(5,([],[])),(25,([],[])),(26,([],[]))]

Good bug report.  Tricky thing to find, but I tracked it down after
a while using Hat.  Patch attached.

Regards,
    Malcolm

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