I don't want to belabor this, but hey, it's in f-strings! And if it's an actual problem I'd like to fix it.

> It can be uninitialized if the parenstack[nested_depth] value is itself initialized, which can happen if the memory block pointed by parenstack has not been initialized to some value after malloc'ed and parenstack[nested_depth] never got a value.

parenstack is allocated on the stack, not that that changes the discussion much.

It looks like everywhere that parenstack[nested_depth] is read, it's already been written to.

Anyway, (if I'm right,) this makes my points that a) there are false positives, and b) we should have separate issues for each actual problem.