https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81806
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> --- **But**, as I said, I think it's OK to change the pb_ds types. We can use inline namespaces to change the mangled names of the affected types, and the user base of pb_ds is probably so tiny that it won't actually hurt anybody. Changing std::vector would not be OK, because everybody uses it.