In a fairly recent CVS (I don't have 5.04* easily available to check it):
igloo@userpc15:bug$ ghc --make Foo -o Foo -prof -auto-all -O
Chasing modules from: Foo
Compiling Inflate ( Inflate.lhs, ./Inflate.o )
Compiling Main ( Foo.lhs, ./Foo.o )
Linking ...
igloo@userpc15:bug$ ./Foo +RTS -hb
Foo: internal error: Invalid object in processHeapClosureForDead(): 17260
Please report this as a bug to [EMAIL PROTECTED],
or http://www.sourceforge.net/projects/ghc/
igloo@userpc15:bug$
Source at http://urchin.earth.li/~ian/bug.tar.gz
Thanks
Ian
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