René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Leak test of test_descr fails Base2 != Base","articleBody":"# Bug report\n\n### Bug description:\n\nThis seems to be caused by GH-133114.\n\nCommand to re-produce:\n```\n./python -m test -R 3:3 -j12 test_descr\n```\n\nThe failure output:\n```\nFAIL: test_type_lookup_mro_reference (test.test_descr.MiscTests.test_type_lookup_mro_reference)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64.refleak/build/Lib/test/test_descr.py\", line 5181, in test_type_lookup_mro_reference\n    self.assertEqual(X.mykey, 'from Base')\n    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^\nAssertionError: 'from Base2' != 'from Base'\n- from Base2\n?          -\n+ from Base\n----------------------------------------------------------------------\nRan 156 tests in 0.829s\nFAILED (failures=1, skipped=1, expected failures=2)\ntest test_descr failed\n```\n\nThis appears to be another bug in the type lookup (MRO) cache.\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\nLinux\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-133127\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/nascheme","@type":"Person","name":"nascheme"},"datePublished":"2025-04-29T00:57:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/133122/cpython/issues/133122"}