[Bug c++/105848] [12 Regression] undefined reference for default template argument of function type

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105848

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Patrick Palka
<ppa...@gcc.gnu.org>:

https://gcc.gnu.org/g:9a69c36417ad597ea2dce20fd704878c3727bc38

commit r14-11422-g9a69c36417ad597ea2dce20fd704878c3727bc38
Author: Patrick Palka <ppa...@redhat.com>
Date:   Tue Mar 18 11:38:33 2025 -0400

    c++: memfn pointer as NTTP argument considered unused [PR119233]

    This is just the member function pointer version of PR c++/105848,
    in which our non-dependent call pruning may cause us to not mark an
    otherwise unused function pointer template argument as used.

            PR c++/119233

    gcc/cp/ChangeLog:

            * pt.cc (mark_template_arguments_used): Also handle member
            function pointers.

    gcc/testsuite/ChangeLog:

            * g++.dg/template/fn-ptr5.C: New test.

    Reviewed-by: Jason Merrill <ja...@redhat.com>
    (cherry picked from commit 51b1c0a2dde8ada0856c8a8cf2c1d26ac1657787)