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1. Commits on Oct 24, 2026

   • gh-159739: Keep text I/O state valid across reentrant callbacks (#160398)

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     jelle-openai

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2. Commits on Oct 23, 2026

   • gh-160181: Don't modify a hashed bytes buffer in place in io.BytesIO (GH-160182)

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     gpshead

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3. Commits on Oct 22, 2026

   • gh-159739: Recheck BytesIO state after converting truncate size (#160190)

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     jelle-openai

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   • gh-159739: Validate newline replacement in TextIOWrapper.write (#160191)

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     jelle-openai

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   • Fix unchecked `NULL` returns in several C modules (#160213)

     StanFromIreland

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   • gh-159739: Respect readline limits after a short read (#159974)

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     jelle-openai

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4. Commits on Oct 21, 2026

   • gh-114258: Update AC to support @critical_section for tp_iternext (gh-159962)

     corona10

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5. Commits on Oct 20, 2026

   • gh-159739: Handle overlapping buffers in BytesIO.readinto (#159777)

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     jelle-openai

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     JelleZijlstra

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6. Commits on Oct 7, 2026

   • gh-157364: Fix use-after-free in io.TextIOWrapper during reentrant detach (#157370)

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     ashm-dev

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     vstinner

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   • gh-158897: Optimize io.BufferedReader.readline() by calling memchr() (#158944)

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     vstinner

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7. Commits on Oct 5, 2026

   • gh-157407: Use _PyUnicode_AsUTF8NoNUL for AC 's' and 'z' converters (#158210)

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8. Commits on Oct 3, 2026

   • gh-158585: Use PyBytesWriter in io.BufferedReader.readline() (#158615)

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     vstinner

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9. Commits on Oct 2, 2026

   • gh-150942: Speed up BytesIO.readlines() using reference-stealing append (#155171)

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     Taeknology

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10. Commits on Sep 27, 2026

    • gh-157407: Argument Clinic: parse positional-only `defining_class` methods without `_PyArg_Parser` (#157483)

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      eendebakpt

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      claude

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11. Commits on Sep 24, 2026

    • gh-155496: Use Argument Clinic for more functions of the _io module (GH-155511)

      serhiy-storchaka

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12. Commits on Sep 19, 2026

    • gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

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      serhiy-storchaka

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13. Commits on Sep 18, 2026

    • gh-155742: Use PyBytesWriter in _Py_strhex_impl() (#157734)

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      vstinner

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14. Commits on Sep 13, 2026

    • gh-155742: Use PyBytesWriter in winconsoleio.c (#157391)

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      vstinner

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15. Commits on Sep 12, 2026

    • gh-157242: Do not close io.BytesIO on MemoryError (#157344)

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      vstinner

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    • io: Use a PyBytesWriter for IOBase.readline (#157024)

      methane

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16. Commits on Sep 7, 2026

    • gh-157048: check for buffer errors before mutating in BytesIO.__init__ (#157049)

      ngoldbaum

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17. Commits on Sep 2, 2026

    • gh-155742: Use PyBytesWriter in io _textiowrapper_writeflush() (#155743)

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      vstinner

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18. Commits on Aug 29, 2026

    • gh-72353: Continue reading from the console after ignored Ctrl+C (GH-155434)

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19. Commits on Aug 23, 2026

    • gh-156261: Move converters used in several files to Argument Clinic (GH-156262)

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      serhiy-storchaka

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      claude

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20. Commits on Aug 18, 2026

    • gh-113318: Fix @getter and @setter in Argument Clinic (GH-155778)

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      serhiy-storchaka

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21. Commits on Aug 17, 2026

    • gh-153539: Fix use-after-free in TextIOWrapper.tell() with a reentrant decoder (GH-153540)

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      tonghuaroot

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22. Commits on Aug 14, 2026

    • gh-111331: Allow closing BytesIO with exported buffers (GH-155383)

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      serhiy-storchaka

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23. Commits on Aug 11, 2026

    • gh-86768: Raise OSError when seeking a pipe on Windows (GH-133137)

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      aisk

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      serhiy-storchaka

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24. Commits on Aug 4, 2026

    • gh-154523: Fix data-race in `TextIOWrapper.detach()` (#154565)

      brijkapadia

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25. Commits on Jul 25, 2026

    • gh-153296: Fix thread-safety data race in io.StringIO iterator (#153368)

      Twix1288

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    • gh-153290: Fix data race in BytesIO.__setstate__ installing __dict__ (#153376)

      bhuvi27

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26. Commits on Jul 6, 2026

    • gh-151640: Track sharing of `BytesIO` buffer in free-threaded builds (GH-151651)

      pedramkarimii

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27. Commits on Jun 26, 2026

    • gh-90533: Implement BytesIO.peek() (#150917)

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28. Commits on Jun 24, 2026

    • gh-151814: Fix unbounded memory growth from repeated empty writes to `io.TextIOWrapper` (#151817)

      StanFromIreland

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      c613072View commit details

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29. Commits on Jun 9, 2026

    • gh-143008: Fix Null pointer dereferences in TextIOWrapper underlying stream access (#145957)

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