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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"3.1 cannot unpickle 2.7-created pickle","articleBody":"BPO | [5180](https://bugs.python.org/issue5180)\n--- | :---\nNosy | @malemburg, @mdickinson, @abalkin, @pitrou, @avassalotti\nSuperseder | \u003cli\u003ebpo-9267: Update pickle opcode documentation in pickletools for 3.x\u003c/li\u003e\nFiles | \u003cli\u003e[27.bench](https://bugs.python.org/file12973/27.bench \"Uploaded as application/octet-stream at 2009-02-07.22:35:24 by @pitrou\")\u003c/li\u003e\u003cli\u003e[pickle-bug.py](https://bugs.python.org/file17784/pickle-bug.py \"Uploaded as text/plain at 2010-06-28.00:43:07 by @abalkin\"): run with python2\u003c/li\u003e\u003cli\u003e[unpickle-bug.py](https://bugs.python.org/file17785/unpickle-bug.py \"Uploaded as text/plain at 2010-06-28.00:43:36 by @abalkin\"): run with python3\u003c/li\u003e\u003cli\u003e[issue5180-pickle.diff](https://bugs.python.org/file17786/issue5180-pickle.diff \"Uploaded as text/plain at 2010-06-28.01:27:08 by @abalkin\")\u003c/li\u003e\u003cli\u003e[unpickle-bug-2.py](https://bugs.python.org/file17787/unpickle-bug-2.py \"Uploaded as text/plain at 2010-06-28.02:11:10 by @abalkin\")\u003c/li\u003e\u003cli\u003e[issue5180.diff](https://bugs.python.org/file17792/issue5180.diff \"Uploaded as text/plain at 2010-06-28.17:20:50 by @abalkin\"): _pickle.c fixes with tests\u003c/li\u003e\u003cli\u003e[issue5180a.diff](https://bugs.python.org/file18017/issue5180a.diff \"Uploaded as text/plain at 2010-07-15.17:50:00 by @abalkin\"): Patch for py3k branch, revision 82911.\u003c/li\u003e\u003cli\u003e[issue5180b.diff](https://bugs.python.org/file18037/issue5180b.diff \"Uploaded as text/plain at 2010-07-17.07:52:32 by @avassalotti\")\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 = 'https://github.com/abalkin'\nclosed_at = \u003cDate 2010-07-17.23:02:54.180\u003e\ncreated_at = \u003cDate 2009-02-07.22:28:53.400\u003e\nlabels = ['extension-modules', 'type-bug']\ntitle = '3.1 cannot unpickle 2.7-created pickle'\nupdated_at = \u003cDate 2010-07-17.23:02:54.179\u003e\nuser = 'https://github.com/pitrou'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2010-07-17.23:02:54.179\u003e\nactor = 'belopolsky'\nassignee = 'belopolsky'\nclosed = True\nclosed_date = \u003cDate 2010-07-17.23:02:54.180\u003e\ncloser = 'belopolsky'\ncomponents = ['Extension Modules']\ncreation = \u003cDate 2009-02-07.22:28:53.400\u003e\ncreator = 'pitrou'\ndependencies = []\nfiles = ['12973', '17784', '17785', '17786', '17787', '17792', '18017', '18037']\nhgrepos = []\nissue_num = 5180\nkeywords = ['patch']\nmessage_count = 25.0\nmessages = ['81351', '81352', '108768', '108769', '108771', '108796', '108799', '108812', '108814', '108815', '108817', '108819', '108821', '108846', '108866', '108879', '108880', '108885', '108897', '110383', '110536', '110541', '110559', '110592', '110613']\nnosy_count = 5.0\nnosy_names = ['lemburg', 'mark.dickinson', 'belopolsky', 'pitrou', 'alexandre.vassalotti']\npr_nums = []\npriority = 'high'\nresolution = 'fixed'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '9267'\ntype = 'behavior'\nurl = 'https://bugs.python.org/issue5180'\nversions = ['Python 3.1', 'Python 3.2']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/pitrou","@type":"Person","name":"pitrou"},"datePublished":"2009-02-07T22:28:53.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":25},"url":"https://github.com/49430/cpython/issues/49430"}