[ ghc-Bugs-1202062 ] internal compiler error: the `impossible' happened

Bugs item #1202062, was opened at 2005-05-14 18:48
Message generated for change (Comment added) made by simonpj
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Category: Compiler (Type checker)
Group: 6.4
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Alexander Samoilov (asamoilov)
Assigned to: Nobody/Anonymous (nobody)
Summary: internal compiler error: the `impossible' happened

Initial Comment:
Dear Haskellers,

I've got the following error message during
compilation of the attached Signal.hs file with ghc 6.4
and 6.5.

ghc -c Signal.hs
ghc-6.4: panic! (the `impossible' happened, GHC version
6.4):
        types/Type.lhs:(1107,0)-(1108,77):
Non-exhaustive patterns in function zip_ty_env
 
 
Please report it as a compiler bug to
glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.

I spent some time stripping the file to only several
lines :)

Best regards

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>Comment By: Simon Peyton Jones (simonpj)
Date: 2005-05-16 15:24

Message:
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Excellent bug report, thank you.   Turns out that this was a 
clerical error in a minor function, which has been in GHC for 
ages.  Fixed now, though; tc183 tests for it.

Simon

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Comment By: Alexander Samoilov (asamoilov)
Date: 2005-05-14 19:13

Message:
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Sorry, I attached Signal.hi instead Signal.hs
Reattaching the right file and deleting wrong.

All the best.

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

Comment By: Alexander Samoilov (asamoilov)
Date: 2005-05-14 18:54

Message:
Logged In: YES 
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Sorry, I attached Signal.hi instead Signal.hs
Reattaching the right file and deleting wrong.

All the best.

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

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=108032&aid=1202062&group_id=8032