[issue17263] crash when tp_dealloc allows other threads

[Albert Zeyer]

Albert Zeyer added the comment:

Btw., this turns out to be at least 4 kind of separate bugs:

1. The crash from the testcase - when the interpreter shuts down.

2. Maybe the crash from my musicplayer app - if that is a different one. But very related to the first one.

3. Many loops over the thread states could have code inside which might release the GIL. All these loops can crash because the thread state could be invalidated in the meanwhile.

4. Possible deadlock with HEAD_LOCK usage.

Should we make separate issue reports for each?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17263>
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