[issue16284] concurrent.futures ThreadPoolExecutor keeps unnecessary references to worker functions.

[Brian Quinlan]

Brian Quinlan added the comment:

The concurrent.futures stuff looks good to me.

Could you add a comment explaining why the delete is necessary? And, as Antoine said, the test should be CPython only.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16284>
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