[libcxx-commits] [libcxx] [libc++] Make std::allocator always trivially default constructible (PR #169914)

[Louis Dionne via libcxx-commits]

ldionne wrote:

I'd also like to keep an opt-out for the previous behavior for two releases, to give time for people to figure this out and give feedback (i.e. complain) if this ends up having wider fallout than anticipated.

https://github.com/llvm/llvm-project/pull/169914