https://github.com/usx95 commented:

We seem to be good at detecting new false positives but this is natural due to 
the visible compiler diagnositc. Unfortunately, same is not true for new 
false-negatives. More tests in our test-suite is the only way to detect those 
and we should be extensively adding more tests. This is something I feel 
particularly missing for lifetime analysis given the complexity of the code. 
This is obviously not actionable and non-blocking and is more of a meta comment.

See my comment for ideas for more tests.

I also found a recently introduced false-negative. This is not particularly 
introduced by this PR but is very related:
https://github.com/llvm/llvm-project/issues/108463

https://github.com/llvm/llvm-project/pull/108344
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