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1. Commits on Sep 26, 2026

   • gh-158169: Clear `zlib.Decompress.unconsumed_tail` at end of stream (#158177)

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     GruffElixir

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     StanFromIreland

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2. Commits on Sep 14, 2026

   • gh-117404: Add structured version info for compression modules (GH-150567)

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     serhiy-storchaka

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     claude

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3. Commits on Aug 23, 2026

   • gh-156173: Fix `zlib.Decompress.flush()` silently returning corrupted output instead of raising `zlib.error` (#156176)

     StanFromIreland

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     5442687View commit details

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4. Commits on Aug 22, 2026

   • gh-156180: Reject a negative `len2` in `zlib.{adler32,crc32}_combine()` (#156181)

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     StanFromIreland

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     picnixz

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5. Commits on May 24, 2026

   • gh-150285: Fix too long docstrings in Argument Clinic code (GH-150338)

     serhiy-storchaka

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6. Commits on Apr 13, 2026

   • gh-148395: Fix a possible UAF in `{LZMA,BZ2,_Zlib}Decompressor` (GH-148396)

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     StanFromIreland

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7. 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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8. Commits on Mar 17, 2026

   • gh-144545: Improve handling of default values in Argument Clinic (GH-146016)

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     serhiy-storchaka

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9. Commits on Dec 12, 2025

   • gh-116738: Make zlib module thread-safe (gh-142432)

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     yoney

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10. Commits on Oct 15, 2025

    • gh-76007: Deprecate `zlib.__version__` attribute (#140130)

      StanFromIreland

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11. Commits on Oct 14, 2025

    • gh-139877: Use PyBytesWriter in pycore_blocks_output_buffer.h (#139976)

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      emmatyping

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      picnixz

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12. Commits on Sep 13, 2025

    • gh-129813, PEP 782: Use PyBytesWriter in lzma and zlib (#138832)

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      vstinner

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    • gh-129813, PEP 782: Use Py_GetConstant(Py_CONSTANT_EMPTY_BYTES) (#138830)

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      vstinner

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13. Commits on Sep 11, 2025

    • gh-116946: add `Py_TPFLAGS_IMMUTABLETYPE` to several internal types (#138582)

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      picnixz

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14. Commits on Sep 2, 2025

    • GH-135763: AC: Use ``Py_ssize_t(allow_negative=False)`` (#138394)

      AA-Turner

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15. Commits on Sep 1, 2025

    • gh-116946: fully implement GC protocol for `zlib` objects (#138290)

      picnixz

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16. Commits on Aug 19, 2025

    • gh-95534: Convert ``ZlibDecompressor.__new__`` to AC (#137923)

      AA-Turner

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17. Commits on Aug 18, 2025

    • GH-137623: Use an AC decorator for docstring line length enforcement (#137690)

      AA-Turner

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18. Commits on May 27, 2025

    • gh-134635: add `zlib.{adler32,crc32}_combine` to combine checksums (#134650)

      picnixz

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19. Commits on Mar 20, 2025

    • gh-111178: Fix function signatures for multiple tests (#131496)

      vstinner

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20. Commits on Mar 19, 2025

    • gh-91349: Replace zlib with zlib-ng in Windows build (GH-131438)

      zooba

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21. Commits on Jan 3, 2025

    • gh-111178: fix UBSan failures in `Modules/zlibmodule.c` (GH-128252)

      picnixz

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22. Commits on Oct 9, 2024

    • gh-115754: Use Py_GetConstant(Py_CONSTANT_EMPTY_BYTES) (#125195)

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      vstinner

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23. Commits on Jun 27, 2024

    • gh-121040: Use __attribute__((fallthrough)) (#121044)

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      vstinner

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      sobolevn

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24. Commits on May 3, 2024

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

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      swtaarrs

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25. Commits on Dec 4, 2023

    • gh-105967: Work around a macOS bug, limit zlib C library crc32 API calls to 1gig (#112615)

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      gpshead

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26. Commits on Aug 21, 2023

    • gh-108220: Internal header files require Py_BUILD_CORE to be defined (#108221)

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      vstinner

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27. Commits on Jul 27, 2023

    • gh-107279 Add `<stddef.h>` to `Modules/zlibmodule.c` to fix failing builds (#107280)

      shailshouryya

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28. Commits on Jul 25, 2023

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

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      vstinner

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    • gh-86493: Modernize modules initialization code (GH-106858)

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      serhiy-storchaka

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29. Commits on Jul 2, 2023

    • gh-104922: remove PY_SSIZE_T_CLEAN (#106315)

      methane

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30. Commits on May 23, 2023

    • Fix missing/incomplete NULL checks in multiple source files (#104564)

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      chgnrdv

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      arhadthedev

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      13b5d79View commit details

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31. 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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32. Commits on Feb 4, 2023

    • gh-101322: Ensure test_zlib.ZlibDecompressorTest runs, fix errors in ZlibDecompressor (#101323)

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      rhpvorderman

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33. Commits on Nov 14, 2022

    • gh-99300: Use Py_NewRef() in Modules/ directory (#99473)

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      vstinner

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