[issue31070] test_threaded_import: KeyError ignored in _get_module_lock.<locals>.cb on AMD64 Windows8.1 Refleaks 3.x

[STINNER Victor]

STINNER Victor added the comment:

Oh, it's easy to reproduce the bug on the master branch. Example on Linux:

haypo at selma$ ./python -m test test_threaded_import
Run tests sequentially
0:00:00 load avg: 0.16 [1/1] test_threaded_import
Exception ignored in: <function _get_module_lock.<locals>.cb at 0x7f53201e2f70>
Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 176, in cb
KeyError: ('random',)
1 test OK.

Total duration: 2 sec
Tests result: SUCCESS

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nosy: +brett.cannon, ncoghlan

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<http://bugs.python.org/issue31070>
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