Clang change to "cripple" the warning (rC321691) was not effective for libcxx because we opt-in to Wextra
But since the warning is partitioned now, we could opt-out of this specific one?
I think that's acceptable and I think we should have known/expected that as of the change to clang.
The only real way to mitigate that is with a local pragma to disable the warning for those spots, correct? And I believe that had been proposed and rejected before.