[PATCH] libstdc++: add a workaround for format_kind<optional<T>> [PR120644]

[Jonathan Wakely]

On Fri, 13 Jun 2025 at 10:55, Giuseppe D'Angelowrote:
>
> Hi,
>
> Attached is a workaround for
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120644
>
> It looks it's a C++ frontend bug, this commit just silences the
> regression in the modules testsuite that have been observed after the
> introduction of range support for optional in r16-1487-g774ae8734f0e19.
> The semantic of the code is otherwise equivalent -- the underlying bug
> is not addressed by this.


OK thanks