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1. Commits on Oct 20, 2026

   • [3.15] gh-159759: Fix libpython.static in PEP 739 build-details.json (GH-159766) (#159823)

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     miss-islington

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     itamaro

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2. Commits on Oct 19, 2026

   • [3.15] gh-149015: Fix clear_all_file_breaks for breakpoints sharing a line in bdb (GH-159748) (#159801)

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     miss-islington

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     gaogaotiantian

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   • [3.15] gh-157384: Document and test PyImport_CreateModuleFromInitfunc() semantics (GH-157389) (#159791)

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   • [3.15] gh-158973: Reset the warnings lock after fork in the child (gh-158974) (gh-159614)

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     nascheme

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     ngoldbaum

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   • [3.15] gh-155426: correctly reject non-bytes keys in `hmac.digest` (GH-155427) (#159743)

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     miss-islington

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     picnixz

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   • [3.15] gh-155782: avoid a crash in `ssl.SSLObject.group` for session-less objects (GH-155829) (#159740)

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     miss-islington

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     picnixz

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   • [3.15] gh-158121: Preserve instruction events when line monitoring is disabled (GH-158456) (#159733)

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     miss-islington

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     limadog9

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   • [3.15] gh-141276: Avoid compiling zipimport source in get_filename (GH-153799) (#159729)

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     miss-islington

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     harjothkhara

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   • [3.15] Docs: Fix built-in function `__self__` attribute descriptions (GH-159653) (GH-159710)

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     miss-islington

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     crypt0lith

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   • [3.15] gh-130279: Fix missing exception handlers for jumps in loops (GH-159460) (#159698)

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     miss-islington

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     LH-and-FPGA

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   • [3.15] gh-158239: Fix `asyncio.gather()` performance regression (GH-158240) (#158655)

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     miss-islington

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     deadlovelll

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   • [3.15] gh-159041: Fix use-after-free in asyncio task tracking during thread state cleanup (GH-159073) (#159694)

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     miss-islington

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     ngoldbaum

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   • [3.15] gh-159049: Fix reference cycles after a failed TLS handshake in asyncio (#159682)

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     deadlovelll

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3. Commits on Oct 17, 2026

   • [3.15] gh-159620: Fix remote asyncio stacks stopping at async generators (GH-159623) (GH-159654)

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   • [3.15] gh-159517: Do not use ::tk::unsupported::MacWindowStyle in IDLE on Tk 9.1 (GH-159527) (GH-159624)

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     miss-islington

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     serhiy-storchaka

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   • [3.15] gh-159538: Fix deep chain leak in test_deeply_dotted_name (GH-159576) (#159609)

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     miss-islington

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     brittanyrey

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   • [3.15] gh-98894: Fix test_dtrace on Solaris (GH-154803) (#159602)

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4. Commits on Oct 16, 2026

   • [3.15] gh-157364: Fix use-after-free in io.TextIOWrapper during reentrant detach (#159591)

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   • [3.15] gh-158585: Backport test_capi.test_bytes from main (#159588)

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     vstinner

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   • [3.15] gh-158681: Document that regrtest no longer supports `test_main()` (GH-158682) (#159575)

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     miss-islington

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     bazhil

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   • [3.15] gh-158451: Add _PyUnicodeWriter_WriteLatin1String() test (#158464) (#159551)

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   • [3.15] gh-157242: Add support.inject_memory_error() function (#159553)

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   • [3.15] gh-158585: Fix _PyBytes_Resize() if hash value is already computed (#159555)

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   • [3.15] gh-157710: Add MemoryError tests to PyUnicodeWriter (#159548)

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   • [3.15] gh-157242: Add more PyBytesWriter tests (#159546)

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   • [3.15] gh-158445: Detect invalid UCS4 characters in debug mode (#158502) (#159524)

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   • [3.15] gh-156939: Add tests on the PyUnicode C API (#159533)

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   • [3.15] gh-159428: Don't read mimetypes.knownfiles by default on Windows (GH-159445)

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     miss-islington

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     cjames23

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   • [3.15] gh-159430: Add _PyObject_LookupSpecial error checks in bytes/weakref (GH-159432) (GH-159474)

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     miss-islington

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     msullivan

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   • [3.15] gh-158445: Add C API tests on build information functions (#159515)

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     vstinner

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     StanFromIreland

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   • [3.15] gh-159517: Modernize tkinter.simpledialog (#159518)

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     vstinner

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     serhiy-storchaka

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5. Commits on Oct 14, 2026

   • [3.15] gh-159288: Avoid segfault by adding missing recursion checks when walking lazy import chains (GH-159289) (#159416)

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     miss-islington

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     brittanyrey

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   • [3.15] gh-159293: Restore the recursion limit after the free-threading race test (GH-159311) (#159389)

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     miss-islington

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     zolaski333

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   • [3.15] gh-159320: Enable stack size detection on Android (GH-159321) (#159409)

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   • [3.15] gh-157384: Set package context in PyImport_CreateModuleFromInitfunc() (GH-157387) (GH-159316)

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     miss-islington

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     itamaro

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