René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"asyncio.timeout(0) and asyncio.timeout(-1) cancellation is delayed","articleBody":"\u003c!--\r\n  If you're new to Python and you're not sure whether what you're experiencing is a bug, the CPython issue tracker is not\r\n  the right place to seek help. Consider the following options instead:\r\n\r\n  - reading the Python tutorial: https://docs.python.org/3/tutorial/\r\n  - posting in the \"Users\" category on discuss.python.org: https://discuss.python.org/c/users/7\r\n  - emailing the Python-list mailing list: https://mail.python.org/mailman/listinfo/python-list\r\n  - searching our issue tracker (https://github.com/python/cpython/issues) to see if\r\n    your problem has already been reported\r\n--\u003e\r\n\r\n**Bug report**\r\n\r\nI expect this to raise a TimeoutError:\r\n```python\r\nasync def amain():\r\n    async with asyncio.timeout(-11):\r\n        await asyncio.sleep(0)\r\n\r\nasyncio.run(amain())\r\n```\r\n\r\nInstead I have to add an extra `asyncio.sleep(0)` to get a TimeoutError\r\n\r\n```python\r\nasync def amain():\r\n    async with asyncio.timeout(-11):\r\n        await asyncio.sleep(0)  # does not raise CancelledError\r\n        await asyncio.sleep(0)  # raises CancelledError\r\n\r\nasyncio.run(amain())\r\n```\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:\r\n- Operating system and architecture:\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/graingert","@type":"Person","name":"graingert"},"datePublished":"2022-07-20T14:37:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/95051/cpython/issues/95051"}