http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53223
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-03 23:57:59 UTC --- If we compare lines #12 and #13, there are subtle differences inside reference_binding (called by initialize_reference, which produces the error): for line #12, which is accepted, TYPE_REF_IS_RVALUE (rto) is true; for line #13 is false (thus reference_binding early returns NULL, no success)
