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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Crash after error in PickleBuffer","articleBody":"# Crash report\n\nThe following script crashes at finalization stage:\n```py\nimport unittest\nimport pickle\n\nclass Test(unittest.TestCase):\n    def test_non_continuous_buffer(self):\n        pb = pickle.PickleBuffer(memoryview(b\"foobar\")[::2])\n        pb.raw()\n\nunittest.main()\n```\nOutput:\n```\nE\n======================================================================\nERROR: test_non_continuous_buffer (__main__.Test.test_non_continuous_buffer)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/home/serhiy/py/cpython/test_non_continuous_buffer.py\", line 7, in test_non_continuous_buffer\n    pb.raw()\n    ~~~~~~^^\nBufferError: cannot extract raw buffer from non-contiguous buffer\n\n----------------------------------------------------------------------\nRan 1 test in 0.001s\n\nFAILED (errors=1)\npython: Objects/memoryobject.c:125: mbuf_dealloc: Assertion `self-\u003eexports == 0' failed.\nAborted (core dumped)\n```\nI cannot yet reproduce the crash without `unittest`, perhaps it is related to some reference loop.\n\nThe crash is _only_ happens in 3.12 an newer. In 3.8-3.11 it just raises an exception (`PickleBuffer` was added in 3.8).\n\ncc @pitrou\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-123400\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2024-07-26T12:00:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/122306/cpython/issues/122306"}