https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108118
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:9578570e305e77b8c105583506781158c137f743 commit r11-10768-g9578570e305e77b8c105583506781158c137f743 Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Dec 15 09:52:48 2022 +0000 libstdc++: Fix self-move for std::weak_ptr [PR108118] I think an alternative fix would be something like: _M_ptr = std::exchange(rhs._M_ptr, nullptr); _M_refcount = std::move(rhs._M_refcount); The standard's move-and-swap implementation generates smaller code at all levels except -O0 and -Og, so it seems simplest to just do what the standard says. libstdc++-v3/ChangeLog: PR libstdc++/108118 * include/bits/shared_ptr_base.h (weak_ptr::operator=): Implement as move-and-swap exactly as specified in the standard. * testsuite/20_util/weak_ptr/cons/self_move.cc: New test. (cherry picked from commit 92eb0adc14a5f84acce7e5bc780b81b1544b24aa)
