[libcxx-commits] [libcxx] [libc++] Take the ABI break for `std::list`'s pointer UB unconditionally (PR #100585)

[Louis Dionne via libcxx-commits]

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

I think this ABI break is very unlikely to actually cause issues. However, as explained in the comments, I think there's a few things we can do to go out of our way to
- catch unintended breakages for a bit of time
- properly communicate the change being done to users and vendors

So overall, I think we can move forward with this after applying a few suggested changes.

https://github.com/llvm/llvm-project/pull/100585