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1. Commits on Jul 3, 2026

   • [3.13] gh-152951 - Fix double DECREF when `newblock` fails during deque.extend calls (GH-152961) (#152973)

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     miss-islington

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     stestagg

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2. Commits on Jun 2, 2026

   • [3.13] gh-150319: Replace all documentation which says "See PEP 585" (#150325) (#150814)

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3. Commits on Mar 12, 2026

   • [3.13] gh-145492: Fix defaultdict __repr__ infinite recursion (GH-145659) (GH-145746)

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4. Commits on Dec 25, 2025

   • [3.13] gh-143004: Fix possible use-after-free in collections.Counter.update() (GH-143044) (GH-143167)

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     miss-islington

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     Kaushalt2004

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5. Commits on Dec 17, 2025

   • [3.13] gh-142495: Make `defaultdict` keep existed value when racing with `__missing__` (GH-142668) (GH-142858)

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     serhiy-storchaka

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     LindaSummer

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6. Commits on Jul 1, 2025

   • [3.13] gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614) (#136126)

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     3 peopleauthored
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7. Commits on Jul 1, 2024

   • [3.13] gh-117657: Fix data races reported by TSAN in some set methods (GH-120914) (#121240)

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     miss-islington

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     aisk

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8. Commits on May 6, 2024

   • gh-118362: Fix thread safety around lookups from the type cache in the face of concurrent mutators (#118454)

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     DinoV

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9. Commits on May 3, 2024

   • gh-116322: Add Py_mod_gil module slot (#116882)

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     swtaarrs

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10. Commits on Feb 15, 2024

    • gh-112050: Make collections.deque thread-safe in free-threaded builds (#113830)

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      mpage

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11. Commits on Feb 14, 2024

    • gh-115243: Fix crash in deque.index() when the deque is concurrently modified (GH-115247)

      kcatss

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12. Commits on Jan 29, 2024

    • gh-112050: Adapt collections.deque to Argument Clinic (#113963)

      mpage

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13. Commits on Aug 24, 2023

    • gh-106320: Remove private _PyDict functions (#108449)

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      vstinner

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14. Commits on Jul 25, 2023

    • gh-106869: Use new PyMemberDef constant names (#106871)

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      vstinner

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15. Commits on May 5, 2023

    • gh-99113: Add Py_MOD_PER_INTERPRETER_GIL_SUPPORTED (gh-104205)

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      ericsnowcurrently

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16. Commits on Apr 12, 2023

    • gh-103092: Isolate `_collections` (#103093)

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      erlend-aasland

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      kumaraditya303

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17. Commits on Mar 24, 2023

    • GH-100989: remove annotation from docstring (GH-102991)

      rhettinger

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    • GH-100989: Revert Improve the accuracy of collections.deque docstrings (GH-102979)

      rhettinger

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18. Commits on Mar 22, 2023

    • gh-100989: Improve the accuracy of collections.deque docstrings (#100990)

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      timobrembeck

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      CAM-Gerlach

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19. Commits on Nov 30, 2022

    • gh-99845: Use size_t type in __sizeof__() methods (#99846)

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      vstinner

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20. Commits on Nov 22, 2022

    • gh-99537: Use Py_SETREF() function in C code (#99656)

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      vstinner

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21. Commits on Nov 14, 2022

    • gh-99300: Use Py_NewRef() in Modules/ directory (#99466)

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      vstinner

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22. Commits on May 3, 2022

    • gh-91320: Use _PyCFunction_CAST() (#92251)

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      vstinner

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23. Commits on Apr 7, 2022

    • Remove micro-optimization that no longer shows a benefit. (GH-32397)

      rhettinger

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24. Commits on Apr 6, 2022

    • bpo-26579: Add object.__getstate__(). (GH-2821)

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      serhiy-storchaka

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25. Commits on Mar 31, 2022

    • bpo-47164: Add _PyASCIIObject_CAST() macro (GH-32191)

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      vstinner

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26. Commits on Feb 8, 2022

    • bpo-46541: Replace core use of _Py_IDENTIFIER() with statically initialized global objects. (gh-30928)

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      ericsnowcurrently

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27. Commits on Nov 8, 2021

    • bpo-45723: Prepare support for autoconf 2.71 (GH-29441)

      tiran

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28. Commits on Oct 12, 2021

    • bpo-45439: Move _PyObject_CallNoArgs() to pycore_call.h (GH-28895)

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      vstinner

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29. Commits on Oct 11, 2021

    • bpo-45439: Rename _PyObject_CallNoArg() to _PyObject_CallNoArgs() (GH-28891)

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      vstinner

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30. Commits on Sep 19, 2021

    • Clean up initialization __class_getitem__ with Py_GenericAlias. (GH-28450)

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      serhiy-storchaka

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31. Commits on Jun 22, 2021

    • bpo-41621: Document defaultdict's default_factory parameter (GH-21945)

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      sweeneyde

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32. Commits on May 5, 2021

    • bpo-40521: Convert deque freelist from global vars to instance vars (GH-25906)

      rhettinger

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33. Commits on Apr 30, 2021

    • bpo-43977: Use tp_flags for collection matching (GH-25723)

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      markshannon

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34. Commits on Mar 25, 2021

    • Revert "bpo-40521: Remove freelist from collections.deque() (GH-21073)" (GH-24944)

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      rhettinger

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