http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51242
--- Comment #14 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-26 12:05:21 UTC --- Anyway, the latent issue is of course with fixed underlying types: if in that case we don't care about warning more, this issue is already fixed, very likely. Even better ;)