internal error: eval_thunk_selector: strange selectee 29

(Apologies for the repeated message, the moderator seems to be out at
the moment, so I just subscribed to the list and resent it, this time
with a bit more information)

Trying to run profiling (+RTS -p -RTS), I get:

  xsactp: internal error: eval_thunk_selector: strange selectee 29
    Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
    or http://www.sourceforge.net/projects/ghc/
  Command exited with non-zero status 254

Compilation was done with:

  -fglasgow-exts -package data -fno-warn-unused-matches -fno-warn-unused-binds 
-W
  -O2 -prof -auto-all -hisuf p.hi -osuf p.o 

Recompilation without the -O2 seems to have eliminated the problem,
although I'm still waiting for the profiling run to finish.

This is with GHC 6.0, on Red Hat 9.

-kzm
-- 
If I haven't seen further, it is by standing in the footprints of giants