http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56587
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-03-10 10:15:41 UTC --- This is before / after / irrespective of this change: http://gcc.gnu.org/ml/libstdc++/2013-03/msg00033.html ?