[Bug sanitizer/117259] [12 Regression] warning: 'j.6' may be used uninitialized [-Wmaybe-uninitialized] with -fsanitize=undefined

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117259

--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-16 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:0c80a308bfa5ed87570f047fdbc0d44c7415f15e

commit r16-9217-g0c80a308bfa5ed87570f047fdbc0d44c7415f15e
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Jul 2 17:54:21 2026 -0400

    c++: co_await and ->* [PR121094]

    The use of TARGET_EXPR in get_member_function_from_ptrfunc since r13-9563
    didn't match the expectations of flatten_await_stmt; the latter isn't
    prepared to handle reuse of a TARGET_EXPR.  Most places in the front-end
    only reuse the TARGET_EXPR_SLOT, not the whole TARGET_EXPR, but that's
    awkward for get_member_function_from_ptrfunc, so let's make it work.

            PR c++/121094
            PR c++/117259

    gcc/cp/ChangeLog:

            * coroutines.cc (replace_proxy): Handle TARGET_EXPR from.
            (flatten_await_stmt): Pass it.

    gcc/testsuite/ChangeLog:

            * g++.dg/coroutines/pmf-121094.C: New test.

    (cherry picked from commit 1948a863280464ed60168d170ab13580bb6bb51b)