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

Bugs item #1276115, was opened at 2005-08-29 22:17
Message generated for change (Settings changed) made by simonpj
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=108032&aid=1276115&group_id=8032

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Compiler
Group: 6.4
>Status: Closed
>Resolution: Fixed
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/.


----------------------------------------------------------------------

>Comment By: Simon Peyton Jones (simonpj)
Date: 2005-08-30 12:09

Message:
Logged In: YES 
user_id=50165

Good bug; already fixed for the upcoming 6.4.1 release. (Try 
the release candidate to confirm.)

----------------------------------------------------------------------

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