https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103013
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- And libstdc++ has exactly the constraints required by the C++ draft. I suggest reporting this as an LWG defect.
redi at gcc dot gnu.org via Gcc-bugs Sun, 31 Oct 2021 11:13:22 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103013
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- And libstdc++ has exactly the constraints required by the C++ draft. I suggest reporting this as an LWG defect.