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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix obsolete comments in gc.c","articleBody":"\n\n## 1\n`gc.c/subtract_refs` references an obsolete constant `GC_REACHABLE` \nhttps://github.com/python/cpython/blob/34d7351ac770ac49875fc39396b2a97828ba05ad/Python/gc.c#L572-L577\n\nIt is obsolete since https://github.com/python/cpython/pull/7043\n\n## 2\n`gc.c/SCAN_RATE_DIVISOR` has obsolete comment about calculating incremental threshold based on count of survivors. It is obsolete since https://github.com/python/cpython/pull/117120\n\nhttps://github.com/python/cpython/blob/34d7351ac770ac49875fc39396b2a97828ba05ad/Python/gc.c#L1345-L1362\n\n## 3\nReference https://github.com/python/cpython/issues/135552 instead of https://github.com/python/cpython/issues/91636 when writing about deallocated objects in the type cache.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-137563\n* gh-137564\n* gh-137614\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/sergey-miryanov","@type":"Person","name":"sergey-miryanov"},"datePublished":"2025-08-08T16:40:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/137562/cpython/issues/137562"}