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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Cryptic error when subclassing multiprocessing classes","articleBody":"BPO | [19895](https://bugs.python.org/issue19895)\n--- | :---\nSuperseder | \u003cli\u003ebpo-21367: multiprocessing.JoinableQueue requires new kwarg\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 2019-04-26.19:39:46.262\u003e\ncreated_at = \u003cDate 2013-12-05.10:35:46.117\u003e\nlabels = ['type-bug', 'library']\ntitle = 'Cryptic error when subclassing multiprocessing classes'\nupdated_at = \u003cDate 2019-04-26.19:39:46.261\u003e\nuser = 'https://github.com/anntzer'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2019-04-26.19:39:46.261\u003e\nactor = 'SilentGhost'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2019-04-26.19:39:46.262\u003e\ncloser = 'SilentGhost'\ncomponents = ['Library (Lib)']\ncreation = \u003cDate 2013-12-05.10:35:46.117\u003e\ncreator = 'Antony.Lee'\ndependencies = []\nfiles = []\nhgrepos = []\nissue_num = 19895\nkeywords = []\nmessage_count = 3.0\nmessages = ['205286', '228410', '231306']\nnosy_count = 2.0\nnosy_names = ['sbt', 'dan.oreilly']\npr_nums = []\npriority = 'normal'\nresolution = 'duplicate'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '21367'\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue19895'\nversions = ['Python 3.4', 'Python 3.5']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2013-12-05T10:35:46.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/64094/cpython/issues/64094"}