René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"os.dup2() raises wrong OSError for negative fds","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\u003e\u003e\u003e os.dup2(-1, 0)\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  OSError: [Errno 0] Error\r\n```\r\n\r\nThe bug is caused by the old manual sign check that at some point lost the part that set `errno`: https://github.com/python/cpython/blob/c3a178398c199038f3a0891d09f0363ec73f3b38/Modules/posixmodule.c#L9832-L9834\r\n\r\nI'm going to submit a PR with the fix.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-102180\n* gh-102419\n* gh-102420\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/izbyshev","@type":"Person","name":"izbyshev"},"datePublished":"2023-02-23T15:04:51.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/102179/cpython/issues/102179"}