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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"multiprocessing.Pool from concurrent threads failure on 3.9.0rc1","articleBody":"BPO | [41567](https://bugs.python.org/issue41567)\n--- | :---\nNosy | @atsuoishimoto, @drougge, @aeros, @iritkatriel, @Cebtenzzre\nSuperseder | \u003cli\u003ebpo-43517: Fix false positives in circular import detection with from-imports\u003c/li\u003e\nFiles | \u003cli\u003e[pool_error_on_3.9.py](https://bugs.python.org/file49401/pool_error_on_3.9.py \"Uploaded as text/plain at 2020-08-17.11:37:30 by @drougge\"): repro example\u003c/li\u003e\n\n\u003csup\u003e*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*\u003c/sup\u003e\n\n\u003cdetails\u003e\u003csummary\u003eShow more details\u003c/summary\u003e\u003cp\u003e\n\nGitHub fields:\n```python\nassignee = None\nclosed_at = \u003cDate 2021-03-16.16:16:54.899\u003e\ncreated_at = \u003cDate 2020-08-17.11:37:30.505\u003e\nlabels = ['type-bug', 'library', '3.9', '3.10']\ntitle = 'multiprocessing.Pool from concurrent threads failure on 3.9.0rc1'\nupdated_at = \u003cDate 2021-03-16.16:16:54.899\u003e\nuser = 'https://github.com/drougge'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2021-03-16.16:16:54.899\u003e\nactor = 'pitrou'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2021-03-16.16:16:54.899\u003e\ncloser = 'pitrou'\ncomponents = ['Library (Lib)']\ncreation = \u003cDate 2020-08-17.11:37:30.505\u003e\ncreator = 'drougge'\ndependencies = []\nfiles = ['49401']\nhgrepos = []\nissue_num = 41567\nkeywords = []\nmessage_count = 6.0\nmessages = ['375542', '375544', '375556', '379400', '379401', '388771']\nnosy_count = 6.0\nnosy_names = ['ishimoto', 'drougge', 'aeros', 'iritkatriel', 'cebtenzzre', 'doublex']\npr_nums = []\npriority = 'normal'\nresolution = 'duplicate'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '43517'\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue41567'\nversions = ['Python 3.9', 'Python 3.10']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/drougge","@type":"Person","name":"drougge"},"datePublished":"2020-08-17T11:37:31.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/85739/cpython/issues/85739"}