clang-tidy: bugprone-unchecked-optional-access regression (hang) from 15.0.7 to 16.0.6

[Dushistov]

test.zip

With attached file if you run (with clang/llvm 15.0.7):

for i in $(seq 1 10); do clang-tidy test.cpp -checks='-*,bugprone-unchecked-optional-access'  -- --std=c++17; done

all works fine.

But with clang/llvm 16.0.6

it hangs on time from 2 minutes to more then several hours.

And it happens randomly, some times run takes several seconds, some times minutes or hours.
On my machine, running the clang-tidy (16.0.6) 10 times results in a 100% hang.

[EugeneZelenko]

Could you please try 17 or main branch? https://godbolt.org should be helpful.

[Dushistov]

I can not find clang-tidy in godbolt, but I was able to install 17.0.3 on Linux machine.
Looks like 17.0.3 contains fix, at least no hangs, and clang-tidy works fast enought.

[EugeneZelenko]

@Dushistov: You need to add relevant tool in addition to compiler on GodBolt.

[neoncube2]

Possible duplicate of #69369?