[issue42969] pthread_exit & PyThread_exit_thread from PyEval_RestoreThread etc. are harmful

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

PyThread_exit_thread() is exposed as _thread.exit() and _thread.exit_thread().

PyThread_exit_thread() is only called in take_gil() (at 3 places in the function) if tstate_must_exit(tstate) is true. It happens in two cases:

* (by design) at Python exit if a daemon thread tries to "take the GIL": PyThread_exit_thread() is called.

* (under an user action) at Python exit if threading._shutdown() is interrupted by CTRL+C: Python (regular) threads will continue to run while Py_Finalize() is running. In this case, when a (regular) thread tries to "take the GIL", PyThread_exit_thread() is called.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42969>
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