https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106093
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Richard Biener from comment #1) > in particular the new allocated storage is processed but the old size is > used?! Yes, that seems correct. We're resizing the vector from N to N+1 (where N happens to be 0). The new size is greater than the existing capacity, so we allocate N+1 elements, then copy the existing N elements into the new storage (which uses old_finish - old_start). Afterwards, we would actually construct the new element in the new storage, but the warning happens while just copying the elements from the old storage to the new.
