https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
--- Comment #3 from Haoxin Tu <haoxintu at gmail dot com> --- (In reply to Nathan Sidwell from comment #2) > yup, dr2061 made that ill-formed. > > p1701 (wg21.link/p1701) documents the behaviour and it appears EWG is > exploring another avenue to resolve the underlying problem 2061 was > attempting to fix. Thank you, Nathan, so this is a valid code, right?