[Bug libstdc++/120650] Error of requesting %d form month_day_last is not detected at compile time

[tkaminsk at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120650

--- Comment #1 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
This is caused by us advertising suppor for days for month_day_last:
  template<__format::__char _CharT>
    struct formatter<chrono::month_day_last, _CharT>
    {                          
      constexpr typename basic_format_parse_context<_CharT>::iterator
      parse(basic_format_parse_context<_CharT>& __pc)
      {
        return _M_f._M_parse(__pc, __format::_Month|__format::_Day,
                             __defSpec);
      }