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1. Commits on Sep 24, 2026

   • gh-157407: Fix a compilation error on Windows. (#158048)

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     [methane]methane

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2. Commits on Sep 23, 2026

   • gh-157407: Reduce code size of ast and unicodeobject (#157393)

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     [methane] [eendebakpt]

     methane

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     eendebakpt

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3. Commits on Sep 15, 2026

   • gh-156909: Fix `AST.__repr__` call getting the `_fields` attribute (GH-157490)

     [johnslavik]johnslavik

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4. Commits on Sep 14, 2026

   • gh-156021: Don't include `...` for empty AST node representations (GH-156022)

     [johnslavik]johnslavik

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5. Commits on Aug 31, 2026

   • gh-156689: Fix out-of-bounds read in `PyAst_CheckMode()` for `mode='func_type'` (#156697)

     [StanFromIreland]StanFromIreland

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6. Commits on Jun 29, 2026

   • gh-82312: Further improvement of error messages for generating AST nodes (GH-150912)

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     [serhiy-storchaka]serhiy-storchaka

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7. Commits on Jun 4, 2026

   • bpo-38131: Improve messages when generating AST nodes from objects with wrong field values (GH-17715)

     [isidentical]isidentical

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8. Commits on May 2, 2026

   • gh-116021: Deprecate support for instantiating abstract AST nodes (#137865)

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     [brianschubert] [picnixz] [JelleZijlstra]

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9. Commits on Apr 28, 2026

   • gh-137600: Promote `ast` node constructor deprecation warnings to errors (#137601)

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     [brianschubert] [picnixz] [JelleZijlstra]

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10. Commits on Mar 24, 2026

    • gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)

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      [befeleme] [vstinner]

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11. Commits on Feb 12, 2026

    • gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)

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      [pablogsal] [Yhg1s] [brittanyrey] [DinoV]

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12. Commits on Jan 31, 2026

    • gh-143055: Implementation of PEP 798 (#143056)

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      [adqm] [JelleZijlstra]

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13. Commits on Jan 26, 2026

    • gh-144169: Fix three crashes in AST objects with non-str kwargs (#144178)

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      [JelleZijlstra] [vstinner]

      JelleZijlstra

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14. Commits on Dec 29, 2025

    • gh-131421: Fix ASDL kw_defaults being `expr*` instead of `expr?*` (GH-133773)

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      [Demonstrandum]Demonstrandum

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15. Commits on Oct 23, 2025

    • gh-140471: Fix buffer overflow in AST node initialization with malformed `_fields` (#140506)

      [StanFromIreland]StanFromIreland

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16. Commits on May 29, 2025

    • gh-133968: Add PyUnicodeWriter_WriteASCII() function (#133973)

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      [vstinner] [ZeroIntensity] [picnixz]

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17. Commits on May 10, 2025

    • gh-133783: Fix __replace__ on AST nodes for optional attributes (#133797)

      [JelleZijlstra]JelleZijlstra

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18. Commits on May 4, 2025

    • gh-131421: fix ASDL grammar for `Dict` to have an `expr?*` keys field (#131419)

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      [Demonstrandum] [picnixz] [JelleZijlstra]

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19. Commits on Apr 30, 2025

    • gh-132661: Implement PEP 750 (#132662)

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      [lysnikolaou] [picnixz] [AA-Turner] [hugovk] [Wingysam]

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20. Commits on Mar 17, 2025

    • gh-131238: Add explicit includes to pycore headers (#131257)

      [vstinner]vstinner

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21. Commits on Feb 25, 2025

    • GH-130396: Use computed stack limits on linux (GH-130398)

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      [markshannon]markshannon

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22. Commits on Feb 24, 2025

    • GH-91079: Revert "GH-91079: Implement C stack limits using addresses, not counters. (GH-130007)" for now (GH130413)

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      [encukou]encukou

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23. Commits on Feb 19, 2025

    • GH-91079: Implement C stack limits using addresses, not counters. (GH-130007)

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      [markshannon]markshannon

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24. Commits on Feb 16, 2025

    • gh-130139: always check ast node type in ast.parse() with ast input (#130140)

      [iritkatriel]iritkatriel

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25. Commits on Jan 23, 2025

    • gh-119182: Use public PyUnicodeWriter in Python-ast.c (#129209)

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      [vstinner]vstinner

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26. Commits on Oct 29, 2024

    • gh-126105: Fix crash in `ast` module, when `._fields` is deleted (#126115)

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      [sobolevn]sobolevn

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27. Commits on Oct 10, 2024

    • gh-125268: Use static string for "1e309" in AST (#125272)

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      [colesbury]colesbury

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28. Commits on Oct 6, 2024

    • gh-125010: Fix `use-after-free` in AST `repr()` (#125015)

      [tomasr8]tomasr8

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29. Commits on Oct 4, 2024

    • gh-111178: Fix function signatures in Python-ast.c (#124942)

      [vstinner]vstinner

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30. Commits on Sep 18, 2024

    • gh-116022: Improve `repr()` of AST nodes (#117046)

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      [tomasr8] [aisk] [JelleZijlstra] [AlexWaygood] [picnixz]

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31. Commits on Jul 11, 2024

    • gh-121332: Make AST node constructor check _attributes instead of hardcoding attributes (#121334)

      [JelleZijlstra]JelleZijlstra

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32. Commits on Jul 4, 2024

    • gh-121141: add support for `copy.replace` to AST nodes (#121162)

      [picnixz]picnixz

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33. Commits on Jun 25, 2024

    • gh-120108: Fix deepcopying of AST trees with .parent attributes (#120114)

      [JelleZijlstra]JelleZijlstra

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34. Commits on May 9, 2024

    • gh-118851: Default ctx arguments to AST constructors to Load() (#118854)

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      [JelleZijlstra] [AlexWaygood]

      JelleZijlstra

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35. Commits on May 6, 2024

    • gh-117486: Improve behavior for user-defined AST subclasses (#118212)

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      [JelleZijlstra]JelleZijlstra

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