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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Refactor `codegen_deferred_annotations_body` to ensure `mangled` is decref'd","articleBody":"# Bug report\n\n### Bug description:\n\nFollow-up item from this PR: https://github.com/python/cpython/pull/146443#pullrequestreview-4033013919\n\nDuring error cases we may fail to decref mangled while using these `ADDOP*` and `VISIT` macros. As a result, we can extract the for loop's body into a subfunction that we check the return of and decref mangled if needed.\n\n```C\n        // NOTE: ref of mangled can be leaked on ADDOP* and VISIT macros due to early returns\n        // fixing would require an overhaul of these macros\n```\n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\nWindows\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-148060\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/A0su","@type":"Person","name":"A0su"},"datePublished":"2026-04-03T22:08:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/148059/cpython/issues/148059"}