https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100366
--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> --- It seems to help if we save the values before the allocation in vector.tcc, although I cannot promise it won't pessimize something else... And that's just a workaround, not a solution. @@ -766,13 +766,16 @@ { const size_type __len = _M_check_len(__n, "vector::_M_range_insert"); + pointer __old_start(this->_M_impl._M_start); + pointer __old_finish(this->_M_impl._M_finish); + pointer __old_end_of_storage(this->_M_impl._M_end_of_storage); pointer __new_start(this->_M_allocate(__len)); pointer __new_finish(__new_start); __try { __new_finish = std::__uninitialized_move_if_noexcept_a - (this->_M_impl._M_start, __position.base(), + (__old_start, __position.base(), __new_start, _M_get_Tp_allocator()); __new_finish = std::__uninitialized_copy_a(__first, __last, @@ -780,7 +783,7 @@ _M_get_Tp_allocator()); __new_finish = std::__uninitialized_move_if_noexcept_a - (__position.base(), this->_M_impl._M_finish, + (__position.base(), __old_finish, __new_finish, _M_get_Tp_allocator()); } __catch(...) @@ -790,12 +793,12 @@ _M_deallocate(__new_start, __len); __throw_exception_again; } - std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish, + std::_Destroy(__old_start, __old_finish, _M_get_Tp_allocator()); _GLIBCXX_ASAN_ANNOTATE_REINIT; - _M_deallocate(this->_M_impl._M_start, - this->_M_impl._M_end_of_storage - - this->_M_impl._M_start); + _M_deallocate(__old_start, + __old_end_of_storage + - __old_start); this->_M_impl._M_start = __new_start; this->_M_impl._M_finish = __new_finish; this->_M_impl._M_end_of_storage = __new_start + __len;