http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54325
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-21 00:41:19 UTC --- We regressed with r175639, the implementation of DR 990: http://gcc.gnu.org/ml/gcc-cvs/2011-06/msg01130.html