[clang] [LifetimeSafety] Trace assignment history for use-after-scope errors (PR #188467)

[via cfe-commits]

https://github.com/suoyuan666 commented:

The implementation here is a bit unrefined, and I haven't found a better workaround yet.
My intention was to bypass this part because I don't believe the assignment statements we're searching for should involve explicit constructors; I only intend to match implicit ones here.

https://github.com/llvm/llvm-project/pull/188467