Bugs item #745755, was opened at 2003-05-29 20:57
Message generated for change (Comment added) made by simonpj
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Category: Compiler
Group: 6.0
Status: Closed
Resolution: Fixed
Priority: 5
Submitted By: Esa Pulkkinen (esapulkkinen)
Assigned to: Nobody/Anonymous (nobody)
Summary: coreSyn/coreUtils.lhs:1188 Non-exhaustive patterns
Initial Comment:
ghc-6.0: panic! (the `impossible' happened, GHC version
6.0):
coreSyn/CoreUtils.lhs:1188: Non-exhaustive
patterns in function isCrossDllArg
Options used for compiling:
ghc -syslib data -syslib text -fglasgow-exts -W
-fno-prune-tydecls -fallow-overlapping-instances
-fno-warn-unused-matches -fallow-undecidable-instances
-o cifl --make Main.lhs
ghci handles that code fine. I didn't include the code,
since it's quite a lot of code, and from the error I'd
expect it's not that useful for finding the problem.
--
Esa Pulkkinen
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>Comment By: Simon Peyton Jones (simonpj)
Date: 2003-06-13 06:48
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Fixed. Test is codeGen/should_compile/cg004.hs
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Comment By: Simon Peyton Jones (simonpj)
Date: 2003-06-10 13:41
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How true. Fixed thank you
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Comment By: Esa Pulkkinen (esapulkkinen)
Date: 2003-05-30 16:58
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My E-mail is esa.pulkkinen at kotiposti.net [I thought you
would see it already since I'm logged on].
Ok, I did now take the effort to reduce it to quite small piece
of code. I've attached it. Removing the last instance
declaration does remove the problem. Also, if I remove the
derivation "ScopeElem s =>" from ScopeOpers class, the
problem goes away.
--
Esa Pulkkinen
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Comment By: Simon Peyton Jones (simonpj)
Date: 2003-05-30 09:21
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It would actually be easier to find this if you submitted the
souce code, preferably cut down a bit. Can you do that,
please? What's your email address?
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