[issue31070] test_threaded_import: KeyError ignored in _get_module_lock.<locals>.cb

[Nick Coghlan]

Nick Coghlan added the comment:

I don't think the changes created the bug, but I do think the new tests to provoke the other race conditions made it easier for the test suite to hit this race as well.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31070>
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