https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106044
--- Comment #1 from Chris Uzdavinis <cuzdav at gmail dot com> --- only in c++20, too.
cuzdav at gmail dot com via Gcc-bugs Tue, 21 Jun 2022 05:27:54 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106044
--- Comment #1 from Chris Uzdavinis <cuzdav at gmail dot com> --- only in c++20, too.