http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51328
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-12-19 14:29:44 UTC --- Well, rejects it a instantiation time. Thus I guess rejecting it earlier is fine, but we don't want to misled people by saying that 'typename T::~T' would be ok.
