https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97773
--- Comment #6 from Janez Zemva <janezz55 at gmail dot com> --- try -std=c++20 ?
janezz55 at gmail dot com via Gcc-bugs Tue, 10 Nov 2020 02:14:46 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97773
--- Comment #6 from Janez Zemva <janezz55 at gmail dot com> --- try -std=c++20 ?