https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106629
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #4) > Even though cppreference is not part of the C++ standard. It would be useful > to put a reference to that defect report on > https://en.cppreference.com/w/cpp/language/template_parameters . The issue is still open, I don't think cppreference documents issues that aren't resolved and applied to the draft yet.