[llvm] [compiler-rt] [msan] Unwind stack before fatal reports (PR #77168)

[Fangrui Song via llvm-commits]

MaskRay wrote:

> Ah, I'm not concerned. You make the call whether the parameter or the local variable (both named `stack`) should be renamed to avoid confusion.

nvm. You changed the patch to reuse the variable `BufferedStackTrace stack`. This is better!

https://github.com/llvm/llvm-project/pull/77168