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1. Commits on Jul 28, 2026

   • gh-154775: Don't accept duplicate plus sign when matching complex number (GH-154776)

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     encukou

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     johnslavik

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2. Commits on Jul 18, 2026

   • gh-153568: Skip parser memo lookups that cannot match (#153571)

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     pablogsal

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   • gh-153568: Cache repeated identifiers while parsing (#153577)

     pablogsal

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3. Commits on Jul 11, 2026

   • gh-153569: Split tokenizer lexer into focused files (#153585)

     pablogsal

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4. Commits on Jul 6, 2026

   • gh-153171: Produce specialized syntax errors for 'not' after an operator in more positions (GH-153175)

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     serhiy-storchaka

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     claude

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5. Commits on Jul 4, 2026

   • gh-150459: Fix `SyntaxError` message for `from x lazy import y` (#150877)

     sobolevn

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     ec5f154View commit details

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6. Commits on Jul 2, 2026

   • gh-151763: Fix OOM-0013 crash when the parser or compiler fails to allocate (#151968)

     tonghuaroot

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     669299bView commit details

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7. Commits on Jun 29, 2026

   • gh-149689: add missing error checks in Parser/action_helpers.c (#149710)

     KowalskiThomas

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

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     serhiy-storchaka

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8. Commits on Jun 27, 2026

   • gh-146495: Improve `SyntaxError` message for `&&` and `||` operators (#150906)

     Aniketsy

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     0f501b9View commit details

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9. Commits on Jun 14, 2026

   • gh-151461: Fix encoding-related exception handling in file tokenizer (GH-151462)

     johnslavik

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10. Commits on Jun 11, 2026

    • gh-151238: Check for `_get_resized_exprs` failure in `_PyPegen_{joined,template}_str` (#151259)

      StanFromIreland

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11. Commits on Jun 6, 2026

    • gh-150207: Raise MemoryError on tokenizer allocation failure instead of crashing (#150275)

      grantlouisherman

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12. Commits on Jun 4, 2026

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

      isidentical

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13. Commits on May 2, 2026

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

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      3 peopleauthored
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14. Commits on Apr 28, 2026

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

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      3 peopleauthored
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15. Commits on Apr 23, 2026

    • gh-145239: Accept unary plus literal pattern (#148566)

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      johnslavik

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16. Commits on Apr 6, 2026

    • gh-148157: Check for `_PyPegen_add_type_comment_to_arg` fail in `_PyPegen_name_default_pair` (#148158)

      StanFromIreland

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17. Commits on Mar 24, 2026

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

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      befeleme

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      vstinner

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18. Commits on Mar 13, 2026

    • gh-145783: Propagate errors raised in `NEW_TYPE_COMMENT` (#145784)

      StanFromIreland

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      e1c2246View commit details

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19. Commits on Mar 12, 2026

    • gh-140594: Fix an out of bounds read when feeding NUL byte to PyOS_StdioReadline() (#140910)

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      3 peopleauthored
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20. Commits on Mar 11, 2026

    • GH-145247: Use _PyTuple_FromPair in Parser and Python (#145842)

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      sergey-miryanov

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    • gh-145376: Fix refleak & pointer type bug in uncommon code paths in Parser/ (GH-145684)

      eendebakpt

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21. Commits on Feb 28, 2026

    • gh-145241: specialize SyntaxError for single trailing-comma with item (#145282)

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      pablogsal

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      johnslavik

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      09e8c38View commit details

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22. Commits on Feb 27, 2026

    • gh-145234: Normalize decoded CR in string tokenizer (#145281)

      pablogsal

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23. Commits on Feb 26, 2026

    • gh-144872: fix heap buffer overflow `_PyTokenizer_ensure_utf8` (#144807)

      AdamKorcz

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      3fc945dView commit details

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24. Commits on Feb 15, 2026

    • gh-144759: Fix undefined behavior from NULL pointer arithmetic in lexer (#144788)

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      raminfp

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25. Commits on Feb 12, 2026

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

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      4 peopleauthored
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26. Commits on Jan 31, 2026

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

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      adqm

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      JelleZijlstra

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27. Commits on Jan 29, 2026

    • gh-144322: typo This errors to These errors (#144323)

      cuiweixie

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28. Commits on Jan 26, 2026

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

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      JelleZijlstra

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      vstinner

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      639c1adView commit details

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29. Commits on Dec 29, 2025

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

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      Demonstrandum

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30. Commits on Dec 20, 2025

    • gh-122581: Use parser mutex in default build for subinterpreters (gh-142959)

      colesbury

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31. Commits on Dec 14, 2025

    • gh-142724: fix error path in `_PyPegen_raise_tokenizer_init_error` (#142725)

      AZero13

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      d844d22View commit details

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32. Commits on Dec 11, 2025

    • gh-142236: Improve error location for missing comma in string concatenations (#142330)

      pablogsal

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      c433986View commit details

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