https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107278
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #6) > Dup of bug 103593. > > CWG2237 is the defect report #. >From that defect report: ``` (Note that this resolution is a change for C++20, NOT a defect report against C++17 and earlier versions.) ``` Which means it was not exactly a defect against previous versions of the standard. It also means clang does not implement this part of the C++20 standard as it was published ...