https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93699
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- Personally, I think it should remain ill-formed. Maybe -fpermissive could allow it (for compat with previous standards) but unfortunately that flag is far too permissive and enables all kinds of ancient legacy junk. If we cleaned it up to be a bit permissive, not ridiculously permissive of pre-1998 code, it could be useful here.
