biographical profiling bug

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 glasgow-haskell-bugs@xxxxxxxxxxx,
    or http://www.sourceforge.net/projects/ghc/
igloo@userpc15:bug$ 

Source at http://urchin.earth.li/~ian/bug.tar.gz


Thanks
Ian