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1. Commits on Oct 9, 2026

   • gh-157710: Move docs for mutating PyUnicode to new section (GH-159028)

     encukou

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   • gh-133879: Announce final release in What's New in Python 3.15 (#158256)

     hugovk

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   • gh-158683: Fix missing source files for _zstd in Modules/Setup (GH-158672)

     maxyz

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   • gh-142927: Update Tachyon examples (#159050)

     hugovk

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2. Commits on Oct 8, 2026

   • gh-158572: Add an external flag to interpreter frames (#158573)

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     kddnewton

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   • gh-156491: Avoid KeyErrors in os._Environ.get() and __contains__() (GH-156492)

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     alexmalyshev

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   • Add a template for GHSAs (#158612)

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     StanFromIreland

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     ezio-melotti

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   • gh-158942: Use more unique variable names in Py_MIN/MAX/ABS() (#158969)

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     vstinner

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   • gh-156895: Document CXX in ./configure --help output (#157046)

     lazerg

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   • gh-158803: Fix crash in bytes.join() on a concurrently mutated list (#158910)

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     christianaurichzm

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   • Add os.supports_dir_fd to test.pythoninfo (GH-158605)

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     encukou

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   • gh-158824: Fix `__getattr__` blocking reification of lazy imports (GH-158825)

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     brittanyrey

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   • gh-150751: validate http.client Content-Length and chunk-size (GH-150752)

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     metsw24-max

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   • gh-158886: Add INCREF/DECREF macros to stable_abi.toml (GH-158941)

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     vstinner

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     encukou

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   • gh-149044: Build test_cext with -Wall -Wextra (#158867)

     vstinner

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3. Commits on Oct 7, 2026

   • gh-158592: Skip reallocation when shrinking a small list (gh-158787)

     corona10

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     cdfdf7bView commit details

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   • gh-158592: Reallocate the list's array when deleting by index (gh-158602)

     x42005e1f

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   • Document the commands provided by `Platforms/WASI/__main__.py` (GH-158976)

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     brettcannon

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   • gh-158893: Add internal _Py_strerror() function (#158982)

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     vstinner

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   • gh-157176: Move blurb for gh-157176 to correct section (#158983)

     StanFromIreland

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   • 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-136872: Build pymalloc in sanitizer builds, but disable it by default (GH-157934)

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     vasiliyk

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   • gh-157176: Make time.struct_time type immutable (#157179)

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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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   • gh-158790: Improve performance for list.insert() and del list[i] free-threaded builds (gh-158791)

     hetaozdh

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   • gh-149044: Avoid C++ warnings in PySlot_END macro (GH-158866)

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     vstinner

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   • Doc: update abi3t build tool support (GH-158171)

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   • gh-156049: Skip `AddressSanitizerTests` on NoGIL builds (GH-158932)

     StanFromIreland

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   • Fix the `sys.remote_exec` row in the audit events table (#158940)

     maurycy

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   • gh-153354: Fix bool conversion in generated __annotate__ (#153360)

     BHUVANSH855

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   • gh-158936: Resolve lazy imports consistently for dataclass annotations (#158939)

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     brittanyrey

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4. Commits on Oct 6, 2026

   • Use _testlimitedcapi in test_free_threading.test_capi (#158935)

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     vstinner

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   • gh-158893: Make os.strerror() thread-safe (#158927)

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     vstinner

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   • gh-157695: Parse also _Py_HAVE_xxx variables in sysconfig (#158926)

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     vstinner

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   • gh-158842: Add Py_SETREF() and Py_XSETREF() to the limited C API (#158843)

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     vstinner

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