[Bug c++/121966] Problems with candidate numbering in print_z_candidates

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121966

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by David Malcolm
<dmalcolm@gcc.gnu.org>:

https://gcc.gnu.org/g:e2b6c1ca1c0b9f857c8b5395a26ba22e11c1239d

commit r15-10672-ge2b6c1ca1c0b9f857c8b5395a26ba22e11c1239d
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Wed Sep 17 16:39:31 2025 -0400

    c++: fix count of z candidates for non-viable candidates, nesting
[PR121966]

    In r15-6116-gd3dd24acd74605 I updated print_z_candidates to show the
    number of candidates, and a number for each candidate.

    PR c++/121966 notes that the printed count is sometimes higher than
    what's actually printed: I missed the case where candidates in the
    list aren't printed due to not being viable.

    Fixed thusly.

    gcc/cp/ChangeLog:
            PR c++/121966
            * call.cc (print_z_candidates): Copy the filtering logic on viable
            candidates from the printing loop to the counting loop, so that
            num_candidates matches the number of iterations of the latter
            loop.

    Signed-off-by: David Malcolm <dmalcolm@redhat.com>

    (cherry picked from commit c0b21d1f45ac6a249974982c1a7f7515efb78747)