http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50025
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-08-08 22:29:08 UTC --- G++ is actually correct according to wording in the C++11 FDIS (see 8.5.4 paragraphs 5 and 6), but we've reported it as an issue that needs to be fixed.