http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55911
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-01-28 01:29:11 UTC --- I think there are extra debug checks in unordered_map on the GCC trunk that aren't in the 4.7 release.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55911
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-01-28 01:29:11 UTC --- I think there are extra debug checks in unordered_map on the GCC trunk that aren't in the 4.7 release.