http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16602
--- Comment #17 from Sebastian Unger <sebunger44 at gmail dot com> --- Well, it is a bug. The question is whether it is a bug in GCC or in the standard. I will raise it in the mailing list as suggested, but GCC could of course again lead the way and implement this as a GNU extension until the standard catches up.