https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78502
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Eric Gallager from comment #2) > since this might be an accepts-invalid for gcc (or a rejects-valid for > clang) I'm cc-ing the C++ FE maintainers for their interpretation of the > standard. It is just a QoI issue. B needs to be Instantiated.
