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Issues

• _PyEval_EvalFrameDefault not in the call stack when interpreter is built with --with-tail-call-interp

  python/cpython#161827 · opened on Nov 11, 2026
  2

• gh-161821: Fall back to lld for Clang LTO builds

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  #161822· opened Nov 11, 2026 · Updated Nov 12, 2026
  3

• Building with LTO and Clang 20 on Debian fails to link

  python/cpython#161821 · opened on Nov 11, 2026

• gh-161735: Update zlib-ng to 2.2.5 on Windows

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  #161813· opened Nov 11, 2026 · Updated Nov 12, 2026
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• ARCHFLAGS does not properly override ‑arch in sysconfig.get_config_vars() values since Python 3.13

  python/cpython#161805 · opened on Nov 11, 2026
  2

• Windows: update zlib-ng to 2.2.5 (PGO builds with Visual Studio 17.11 decompress wrongly on AVX-512 CPUs)

  python/cpython#161735 · opened on Nov 10, 2026
  1

• Python 3.15.2 macOS installer: dangling Tcl/Tk PrivateHeaders links

  python/cpython#161611 · opened on Nov 8, 2026
  3

• gh-136267: Read the target version from patchlevel.h in build-details.json

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  #161532· opened Nov 7, 2026 · Updated Nov 7, 2026

• gh-140266: Only pass _PYTHON_HOST_PLATFORM when cross compiling

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  #161530· opened Nov 7, 2026 · Updated Nov 7, 2026

• gh-136267: Use the target configuration in build-details.json

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  #161529· opened Nov 7, 2026 · Updated Nov 7, 2026

• CYGWIN: Python-3.16.0a1 doesn't select correct strerror_r()

  python/cpython#161198 · opened on Nov 2, 2026

• No way to disable bytecode compilation when installing cpython

  python/cpython#160835 · opened on Oct 28, 2026
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• HAVE_PROTOTYPES macro should be restored

  python/cpython#160829 · opened on Oct 28, 2026
  5

• Windows: python.exe fails to start from a long path because of DLL manifests

  python/cpython#160624 · opened on Oct 24, 2026

• C API: copying a PyStatus emits -Wdeprecated-declarations in C++ with clang since gh-158080

  python/cpython#160436 · opened on Oct 23, 2026
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• Add an opt-in Windows ARM64EC build configuration

  python/cpython#160395 · opened on Oct 22, 2026

• Clang PGO profiles can be overwritten when PIDs are reused

  python/cpython#160380 · opened on Oct 22, 2026

• gh-119696: Add an experimental relocatable configure flag

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  #160377· opened Oct 22, 2026 · Updated Oct 22, 2026·Draft
  1

• test_curses failures on Python 3.16.0a1 with ncurses 6.6 on openSUSE

  python/cpython#159579 · opened on Oct 16, 2026
  3

• configure: --with-dbmliborder=gdbm doesn't find gdbm_compat when its header is <ndbm.h>

  python/cpython#159230 · opened on Oct 12, 2026
  1

• Windows: import hashlib loads user32.dll and the GDI DLLs through libcrypto; delay-load user32

  python/cpython#159008 · opened on Oct 8, 2026
  3

• Computed-goto interpreter 9–13% slower when built with Clang 19 or Xcode 16.3–16.4: dispatch jumps are merged

  python/cpython#158283 · opened on Sep 27, 2026

• 3.14: Windows on Arm build fails since windows-11-arm migrated to windows-11-vs2026-arm

  python/cpython#158244 · opened on Sep 26, 2026
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• OpenSSL configure API checks use the wrong library order for dependencies in LIBS

  python/cpython#157755 · opened on Sep 18, 2026

• The Python C API should only define macros with a name starting wit Py

  python/cpython#157695 · opened on Sep 17, 2026
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