https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117284
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> if (__old_data != _Base::data())
> {
> this->_M_invalidate_all();
> this->_M_update_guaranteed_capacity();
> }
> else if (__old_size < _Base::size())
> this->_M_invalidate_after_nth(_Base::size());
I think we also want:
else
this->_M_update_guaranteed_capacity();
For the case where new elements are inserted into existing capacity without
reallocating.
