[libcxx-commits] [libcxx] [libcxx] Align allocation to match `__set_long_cap` and `__get_long_cap` (PR #90292)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

Could you add some more info here? I don't see what bug this fixes, and I don't understand why we can't drop a byte when setting the long cap.

https://github.com/llvm/llvm-project/pull/90292