[Bug c++/121705] [16 Regression] When using import std, formatting std::chrono::year_month_day will cause compilation failure

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121705

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-08-28

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think we need to bisect this, we just need to export
std::__format::operator==

It will be caused by one of Tomasz's patches, but it doesn't matter which.