https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94013
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- As I said in the other bug, libstdc++ didn't introduce anything, this was caused by a change in the core language rules which invalidated old assumptions in the library. As for reporting libc++ bugs, that's obviously nothing to do with us. Contact the email address shown on their bugzilla.
