[ ghc-Bugs-1276115 ] Unify.unifyTauTyLists: mismatched type lists!

Bugs item #1276115, was opened at 2005-08-29 15:17
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Category: Compiler
Group: 6.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Unify.unifyTauTyLists: mismatched type lists!

Initial Comment:
the following simple code

-------------------------
data List elem =  Cons elem List | Nil

t1 :: List
t1 = Cons 1 Nil
-------------------------

causes (loaded within ghci):


ghc-6.4: panic! (the `impossible' happened, GHC version
6.4):
        Unify.unifyTauTyLists: mismatched type lists!

Please report it as a compiler bug to
glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=108032&aid=1276115&group_id=8032