Bugs item #1117672, was opened at 2005-02-06 21:10
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You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=108032&aid=1117672&group_id=8032
Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: overlapping pattern matching weirdness
Initial Comment:
the following code gives me the error message below in
GHCi:
> context :: Lattice -> Context State Constraint
> context lat = case lat of
> fromBigLattice -> bigC
> fromSmallLattice -> smallC
> _ -> error "non-existing lattice..."
GHCi:
Logic.lhs:92:
Warning: Pattern match(es) are overlapped
In a case alternative:
fromSmallLattice -> ...
_ -> ...
ghc.exe: panic! (the `impossible' happened, GHC version
6.2.1):
Bytecode generator can't handle unboxed tuples.
Possibly due
to foreign import/export decls in source. Workaround:
compile this module to a .o file, then restart session.
Please report it as a compiler bug to
[email protected],
or http://sourceforge.net/projects/ghc/.
the Lattice type is a tuple...
for more details, contact
[EMAIL PROTECTED]
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