http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44500
--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-24 08:58:46 UTC --- The committee closed my DR as not a defect. We could still downgrade this error to a pedwarn, though. http://www.open-std.org/JTC1/SC22/WG21/docs/cwg_closed.html#1078
