http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50714
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-10-13 12:16:26 UTC --- Richard knows - we exchanged some messages off-Bugzilla - that the real issue with the original bug report he is handling is that no codecvt specs are provided by our implementation for _InternT != char and wchar_t. This is conforming, and I don't think is going to change any time soon.