[issue22427] TemporaryDirectory attempts to clean up twice

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Fixed a bug in the test and partially addressed Victor's and Yury's comments.

Antoine, could your pleas answer following question?

Is it safe to remove the "self._finalizer is not None" check in cleanup()? I.e. is it possible that self._finalizer becomes None at garbage collection?

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Added file: http://bugs.python.org/file36658/tempfile_exit_on_shutdown3.patch

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