ghc-5.00.1 panic on UU_Pretty_ext.hs

ghc-5.00.1 on RH7.1 using Manuel Chakravarty's RPMs

using (possibly a somewhat old version of) Doaitse 
Swierstra's parsing/printing combinators.

Attached is a tarball of all the files used in the 
compilation sequence below.

ghc -syslib util -syslib lang -c -O2 -O2-for-C -cpp -
DBEGIN_GHC_ONLY='-}' -DEND_
_ONLY='{-' -o UU_Parsing.o UU_Parsing.hs

UU_Parsing.hs:105: Warning: Pattern match(es) are 
overlapped in the definition o
unction `choose'':
            choose' _ _ _ = ...
ghc -syslib util -syslib lang -c -O2 -O2-for-C 
UU_Parsing_ext.hs
ghc -syslib util -syslib lang -c -O2 -O2-for-C 
UU_Scanner.hs
ghc -syslib util -syslib lang -c -O2 -O2-for-C 
UU_Pretty.hs
ghc -syslib util -syslib lang -c -O2 -O2-for-C 
UU_Pretty_ext.hs
ghc-5.00.1: panic! (the `impossible' happened, GHC 
version 5.00.1):
        CPR Analysis tried to take the lub of a 
function and a tuple

Trac metadata

Trac field	Value
Version	5.0
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedFixed
Component	Compiler
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