René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"cProfile hangs / segfaults with 3.13t","articleBody":"# Bug report\n\n### Bug description:\n\nI'm testing Python 3.13t and trying to run cProfile in a context manager, however it seems to hang and/or segfault. \n\nBelow script repros the issue. \n\nWith `\u003e python -Xgil=1 test_cProfile.py profile`\nit succeeds as expected, however disabling `-Xgil=0` causes it to usually hang.\n\n```python\n\"\"\" example script showing deadlock with python 3.13t and cProfile context manager\npython -Xgil=0 test_cProfile.py # runs normally\npython -Xgil=0 test_cProfile.py profile # hangs\n\"\"\"\nimport cProfile\nimport sys\nimport time\nimport threading\nimport queue\ndef worker(wid, q, stop):\n    while not stop.is_set():\n        try:\n            x = q.get(timeout=1.)\n            print(wid, x)\n        except queue.Empty:\n            continue\ndef run():\n    stop = threading.Event()\n    workers = []\n    queues = []\n    num_workers=2\n    for wid in range(num_workers):\n        queues.append(queue.Queue())\n        workers.append(threading.Thread(target=worker, args=(wid, queues[-1], stop)))\n        workers[-1].start()\n    \n    for i in range(100):\n        queues[i%num_workers].put(i)\n    while any(q.qsize() for q in queues):\n        print(\"Waiting...\")\n        time.sleep(0.1)\n        continue\n    print(\"stop.set()\")\n    stop.set()\n    for wid in range(num_workers):\n        print(\"Joining\", wid)\n        workers[wid].join()\n    \n    print(\"Done\")\ndef main():\n    if len(sys.argv) \u003e 1 and sys.argv[1] == \"profile\":\n        print(\"Profiling with cProfile\")\n        with cProfile.Profile() as pr:\n            run()\n    else:\n        print(\"Running without cProfile\")\n        run()\nif __name__ == \"__main__\":\n    main()\n commented on this paste.```\n\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\nLinux","author":{"url":"https://github.com/andrewkho","@type":"Person","name":"andrewkho"},"datePublished":"2024-10-08T22:56:57.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/125165/cpython/issues/125165"}