[issue46726] Thread spuriously marked dead after interrupting a join call

[Ben]

Ben <benjsimner at gmail.com> added the comment:

This is a duplicate of https://bugs.python.org/issue45274
but the patch there did not fix it

I've just added a PR there (or should it go here?) that (i think) fixes this.

The issue is that the lock.locked() call just checks that *someone* has the lock, not that the previous acquire() is what got the lock.
If it's just that the tstate lock is held because the thread is still running,  then it's premature to release() the lock.

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nosy: +bjs

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