[clang] [LifetimeSafety] Diagnose UAF for aligned and nothrow new expressions (PR #202286)

[Zeyi Xu via cfe-commits]

zeyi2 wrote:

Since thia PR has been approved, I'd like to merge this now. I'll do a quick revert if anything unexpected happens.

https://github.com/llvm/llvm-project/pull/202286