Issues

`sys.remote_exec()` can fail when subinterpreters exist

python/cpython#159194 · opened

on Oct 11, 2026

1

Speed up bytes.join() when all items are exact bytes

python/cpython#159191 · opened

on Oct 11, 2026

IDLE: Display full syntax error diagnostics in the Shell

python/cpython#159190 · opened

on Oct 11, 2026

1

Free-threaded build: `marshal` output of `compile()` of an AST depends on what was compiled before

python/cpython#159188 · opened

on Oct 11, 2026

1

Skip branch-history recording in builds without Tier 2

python/cpython#159186 · opened

on Oct 11, 2026

`marshal.dumps()` raises `TypeError` for a set containing several complex NaNs

python/cpython#159184 · opened

on Oct 11, 2026

os.closerange(0, 0) closes an independently opened file descriptor

python/cpython#159182 · opened

on Oct 11, 2026

Clarify “Sequences also support slicing” in Data Model §3.2.5

python/cpython#159180 · opened

on Oct 11, 2026

csv.Sniffer.has_header documentation misstates column exclusion and voting

python/cpython#159177 · opened

on Oct 11, 2026

`profiling.sampling` summary shows over 100% stack presence for recursive functions

python/cpython#159175 · opened

on Oct 11, 2026

perf trampoline reports wrong code size to profiler

python/cpython#159173 · opened

on Oct 11, 2026

asyncio pstree fails with RecursionError on a deep chain of awaiting tasks

python/cpython#159168 · opened

on Oct 11, 2026

http.cookiejar: support file-like objects

python/cpython#159161 · opened

on Oct 11, 2026

Generator expression over extension type attribute fails with `TypeError: 'functools.partial'` object is not iterable in 3.15

python/cpython#159160 · opened

on Oct 11, 2026

1

Free-threaded 3.15: a `functools.partial` shared between threads no longer scales (it slows down as you add threads)

python/cpython#159157 · opened

on Oct 10, 2026

Run the Python test suite in parallel by default

python/cpython#159155 · opened

on Oct 10, 2026

2

Document `idlelib.util.fix_win_hidpi()`

python/cpython#159139 · opened

on Oct 10, 2026

5

Speed up garbage collector

python/cpython#159137 · opened

on Oct 10, 2026

Free-threaded build: setting a function's `name`/`doc` stops the world; `functools.wraps` from multiple threads is orders of magnitude slower since 3.14.7

python/cpython#159136 · opened

on Oct 10, 2026

1

`_remote_debugging`: `only_active_thread=True` can return a different thread after mode filtering

python/cpython#159130 · opened

on Oct 10, 2026

test_asyncio.test_events failed with "env changed" on AMD64 FreeBSD14 3.14: Warning -- Unraisable exception (...) ResourceWarning: unclosed <socket...>

python/cpython#159123 · opened

on Oct 10, 2026

test_concurrent_futures.test_interpreter_pool failed with "Fatal Python error: PyMutex_Unlock: unlocking mutex that is not locked" on RISC-V 64-bit Ubuntu 3.15

python/cpython#159121 · opened

on Oct 10, 2026

test_wmi.test_wmi_query_threads() crashed with Windows fatal exception: code 0xc0020043 (RPC_NT_INTERNAL_ERROR) on AMD64 Windows PGO Tailcall 3.x

python/cpython#159118 · opened

on Oct 10, 2026

1

test_profile: ProfileTest.test_cprofile() failed on AMD64 Windows PGO Tailcall 3.x

python/cpython#159117 · opened

on Oct 10, 2026

1

Allow `PCBuild/find_python.bat` to find Python 3.15

python/cpython#159113 · opened

on Oct 10, 2026

Navigation Menu

Repository navigation

Issues

`sys.remote_exec()` can fail when subinterpreters exist

Speed up bytes.join() when all items are exact bytes

IDLE: Display full syntax error diagnostics in the Shell

Free-threaded build: `marshal` output of `compile()` of an AST depends on what was compiled before

Skip branch-history recording in builds without Tier 2

`marshal.dumps()` raises `TypeError` for a set containing several complex NaNs

os.closerange(0, 0) closes an independently opened file descriptor

Clarify “Sequences also support slicing” in Data Model §3.2.5

csv.Sniffer.has_header documentation misstates column exclusion and voting

`profiling.sampling` summary shows over 100% stack presence for recursive functions

perf trampoline reports wrong code size to profiler

asyncio pstree fails with RecursionError on a deep chain of awaiting tasks

http.cookiejar: support file-like objects

Generator expression over extension type attribute fails with `TypeError: 'functools.partial'` object is not iterable in 3.15

Free-threaded 3.15: a `functools.partial` shared between threads no longer scales (it slows down as you add threads)

Run the Python test suite in parallel by default

Document `idlelib.util.fix_win_hidpi()`

Speed up garbage collector

Free-threaded build: setting a function's `name`/`doc` stops the world; `functools.wraps` from multiple threads is orders of magnitude slower since 3.14.7

`_remote_debugging`: `only_active_thread=True` can return a different thread after mode filtering

test_asyncio.test_events failed with "env changed" on AMD64 FreeBSD14 3.14: Warning -- Unraisable exception (...) ResourceWarning: unclosed <socket...>

test_concurrent_futures.test_interpreter_pool failed with "Fatal Python error: PyMutex_Unlock: unlocking mutex that is not locked" on RISC-V 64-bit Ubuntu 3.15

test_wmi.test_wmi_query_threads() crashed with Windows fatal exception: code 0xc0020043 (RPC_NT_INTERNAL_ERROR) on AMD64 Windows PGO Tailcall 3.x

test_profile: ProfileTest.test_cprofile() failed on AMD64 Windows PGO Tailcall 3.x

Allow `PCBuild/find_python.bat` to find Python 3.15