https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117983
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:4366711d2d66ea9a2d4fe9dd112795ef0c6f785c commit r14-11508-g4366711d2d66ea9a2d4fe9dd112795ef0c6f785c Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Mar 28 22:00:38 2025 +0000 libstdc++: Fix bogus -Wstringop-overflow in std::vector::insert [PR117983] This was fixed on trunk by r15-4473-g3abe751ea86e34, but that isn't suitable for backporting. Instead, just add another unreachable condition in std::vector::_M_range_insert so the compiler knows this memcpy doesn't use a length originating from a negative ptrdiff_t converted to a very positive size_t. libstdc++-v3/ChangeLog: PR libstdc++/117983 * include/bits/vector.tcc (vector::_M_range_insert): Add unreachable condition to tell the compiler begin() <= end(). * testsuite/23_containers/vector/modifiers/insert/117983.cc: New test. Reviewed-by: Tomasz KamiÅski <tkami...@redhat.com> (cherry picked from commit 878812b6f6905774ab37cb78903e3e11bf1c508c)
