René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Setting state of an exception object with a  dic crashes Python 3.8.14 ","articleBody":"\u003c!--\r\n  Use this template for hard crashes of the interpreter, segmentation faults, failed C-level assertions, and similar.\r\n  Do not submit this form if you encounter an exception being unexpectedly raised from a Python function.\r\n  Most of the time, these should be filed as bugs, rather than crashes.\r\n\r\n  The CPython interpreter is itself written in a different programming language, C.\r\n  For CPython, a \"crash\" is when Python itself fails, leading to a traceback in the C stack.\r\n--\u003e\r\n\r\n# Crash report\r\n\r\nThe following  programs defined a class C. In C, we perform dic clear() operation. When we set state of exception object with the dic, it  causes segmentation fault on main branch (https://github.com/python/cpython/commit/68c46ae68b6e0c36a12e37285fff9ce0782ed01e) and latest stable Python 3.8.14. But it does not trigger any crashing on Python-3.11.0rc2 and Python 3.9.0.\r\n\r\n```\r\nclass C(str):\r\n    def __hash__(self):\r\n        d.clear()\r\n        return 0\r\n\r\nd = {}\r\nd[C()] = C()\r\n\r\ne = Exception()\r\ne.__setstate__(d)\r\n```\r\n\r\n# Error messages\r\nSegmentation Fault (Core dumped)\r\n\r\n# Your environment\r\n\r\n\u003c!-- Include as many relevant details as possible about the environment you experienced the bug in --\u003e\r\n\r\n- CPython versions tested on: Python 3.8.14 and  main branch (https://github.com/python/cpython/commit/68c46ae68b6e0c36a12e37285fff9ce0782ed01e)\r\n- Operating system and architecture: [GCC 7.5.0] on linux\r\n\r\n\u003c!--\r\nYou can freely edit this text. Remove any lines you believe are unnecessary.\r\n--\u003e\r\n","author":{"url":"https://github.com/xiaxinmeng","@type":"Person","name":"xiaxinmeng"},"datePublished":"2022-09-27T08:59:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":17},"url":"https://github.com/97591/cpython/issues/97591"}