http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58420
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Though, could you provide some preprocessed testcase? At any rate, I think it's because ubsan_type_descriptor doesn't handle IDENTIFIER_NODEs very well, this should be fixed as a side effect of http://gcc.gnu.org/ml/gcc-patches/2013-09/msg00917.html patch once it gets applied.
