[project @ 2005-10-12 13:31:12 by simonpj]
MERGE TO STABLE Fix a bug in TcUnify.unifyTyConApp that made a GADT program fail. The trouble happens if the type that we are expecting to be a TyConApp is of form (m a b), where 'm' is refined to a type constructor. Then we want to get nice rigid results, and we weren't.
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