http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47355
--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> 2011-01-19 12:48:57 UTC --- >From what I have seen, it's pass_cleanup_eh removing an SSA (names$_storage_94) name that is still being referenced in the IL (as a parameter to zfree).