[Bug libstdc++/101056] std::compare_partial_order_fallback missing the constraint of "F < E is well-formed"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101056

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:452bfa3f41733eed6f07e5a8aae0bb8214cc6ce6

commit r10-10029-g452bfa3f41733eed6f07e5a8aae0bb8214cc6ce6
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Mon Jun 14 12:30:52 2021 +0100

    libstdc++: Implement LWG 3465 for std::compare_partial_order_fallback
[PR101056]

    libstdc++-v3/ChangeLog:

            PR libstdc++/101056
            * libsupc++/compare (compare_partial_order_fallback): Add
            constraint using reversed parameter order, as per LWG 3465.
            * testsuite/18_support/comparisons/algorithms/fallback.cc:
            Adjust expected result.

    (cherry picked from commit b76a529c095f076c4780df0c913cf6d2391bcbc9)