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Title: gh-151722: Do not track the dict in the GC in _PyDict_FromKeys() by vstinner · Pull Request #152067 · python/cpython · GitHub

Open Graph Title: gh-151722: Do not track the dict in the GC in _PyDict_FromKeys() by vstinner · Pull Request #152067 · python/cpython

X Title: gh-151722: Do not track the dict in the GC in _PyDict_FromKeys() by vstinner · Pull Request #152067 · python/cpython

Description: The Python programming language. Contribute to python/cpython development by creating an account on GitHub.

Open Graph Description: dict_merge() no longer requires the dictionary to be tracked by the GC. Issue: Data race on frozendict reads during construction in the free-threading build #151722

X Description: dict_merge() no longer requires the dictionary to be tracked by the GC. Issue: Data race on frozendict reads during construction in the free-threading build #151722

Opengraph URL: https://github.com/python/cpython/pull/152067

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: Do not track the frozendict in the GC in _PyDict_Fr…https://github.com/python/cpython/commit/30f9c8a3ef503271947a6a1e2066fd95a194c9b5
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Jun 25, 2026 https://github.com/python/cpython/pull/152067#ref-pullrequest-4723437360
gh-151722: Defer GC tracking of frozendict.fromkeys() result until fully built #151967 https://github.com/python/cpython/pull/151967
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