[3.14] gh-140431: Fix GC crash due to partially initialized coroutines (gh-140470) (gh-140504)
The `make_gen()` function creates and tracks generator/coro objects, but
doesn't fully initialize all the fields. At a minimum, we need to
initialize all the fields that may be accessed by gen_traverse because
the call to `compute_cr_origin()` can trigger a GC.
(cherry picked from commit 574405c19e9b5de0504be46a3925027ded4495ae)
[3.14] gh-138774: use `value` to `ast.unparse` code when `str` is `None` in `ast.Interpolation` (GH-139415) (#140503)
gh-138774: use `value` to `ast.unparse` code when `str` is `None` in `ast.Interpolation` (GH-139415)
(cherry picked from commit 4d0849426f4c6862e50658c4e35341ffb5ab288b)
Co-authored-by: George Ogden <38294960+George-Ogden@users.noreply.github.com>
Mark Shannon [Thu, 23 Oct 2025 14:26:58 +0000 (15:26 +0100)]
[3.14] GH-139951: Fix major GC performance regression. Backport of GH-140262 (GH-140447)
* Count number of actually tracked objects, instead of trackable objects. This ensures that untracking tuples has the desired effect of reducing GC overhead
* Do not track most untrackable tuples during creation. This prevents large numbers of small tuples causing execessive GCs.
[3.14] gh-130317: Fix SNaN broken tests on HP PA RISC (GH-140452) (#140467)
gh-130317: Fix SNaN broken tests on HP PA RISC (GH-140452)
While looking at GH-140028, I found some unrelated test regressions in the
3.14 cycle. These seem to all come from GH-130317. From what I can tell,
that made Python more correct than it was before. According to [0], HP PA
RISC uses 1 for SNaN and thus a 0 for QNaN.
Currently, there are a few places where tp_mro could theoretically
become NULL, but do not in practice. This commit adds defensive checks for
NULL values to ensure that any changes do not introduce a crash and that
state invariants are upheld.
The assertions added in this commit are all instances where a NULL value would get passed to something not expecting a NULL, so it is better to catch an assertion failure than crash later on.
There are a few cases where it is OK for the return of lookup_tp_mro to be NULL, such as when passed to is_subtype_with_mro, which handles this explicitly.
(cherry picked from commit a8edca62fc6d44d16c7f86d49421be1a5ebea3e5)
Emma Smith [Tue, 21 Oct 2025 21:44:47 +0000 (14:44 -0700)]
[3.14] `zlib.rst`: Link to constants and deduplicate text (GH-140115) (GH-140349)
* Link to compression setting constants from compression functions
* De-duplicate descriptions of the constants
(cherry picked from commit 091e8513bb58747ade56a03fccb98e220c7722cc)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Victor Stinner <vstinner@python.org>
[3.14] gh-138764: annotationlib: Make `call_annotate_function` fallback to using `VALUE` annotations if both the requested format and `VALUE_WITH_FAKE_GLOBALS` are not implemented (GH-138803) (#140426)
gh-138764: annotationlib: Make `call_annotate_function` fallback to using `VALUE` annotations if both the requested format and `VALUE_WITH_FAKE_GLOBALS` are not implemented (GH-138803)
(cherry picked from commit 95c257e2e691456140e79bd98d1674cbd289eb38)
[3.14] [Docs] Add missing note about Required/NotRequired/ReadOnly in get_type_hints() (GH-139565) (#140386)
[Docs] Add missing note about Required/NotRequired/ReadOnly in get_type_hints() (GH-139565)
(cherry picked from commit a752f58d6b628ab4fe6e4263137ec4cc244ff390)
* Support non-UTF-8 shebang and comments if non-UTF-8 encoding is specified.
* Detect decoding error for non-UTF-8 encoding.
* Detect null bytes in source code.
(cherry picked from commit 38d4b436ca767351db834189b3a5379406cd52a8)
[3.14] gh-140263: Fix data race in test_lock_two_threads (gh-140264) (gh-140369)
Clang-20 detects a data race between the unlock and the non-atomic
read of the lock state. Use a relaxed load for the assertion to avoid
the race.
(cherry picked from commit f11ec6e643f54f4ee698f7dfc878812a315f2af4)
[3.14] gh-63161: Fix PEP 263 support (GH-139481) (GH-139898)
* Support non-UTF-8 shebang and comments if non-UTF-8 encoding is specified.
* Detect decoding error in comments for UTF-8 encoding.
* Include the decoding error position for default encoding in SyntaxError.
(cherry picked from commit 5c942f11cdf5f9d7313200983fa0c58b3bc670a2)
Kumar Aditya [Sat, 18 Oct 2025 14:10:43 +0000 (19:40 +0530)]
[3.14] gh-140067: Fix memory leak in sub-interpreter creation (GH-140111) (#140118)
* [3.14] gh-140067: Fix memory leak in sub-interpreter creation (GH-140111)
Fix memory leak in sub-interpreter creation caused by overwriting of the previously used `_malloced` field. Now the pointer is stored in the first word of the memory block to avoid it being overwritten accidentally.
(cherry picked from commit 59547a251f7069dc6e08cb6082dd21872671e381)
[3.14] GH-133789: Fix unpickling of pathlib objects pickled in Python 3.13 (GH-133831) (#140276)
GH-133789: Fix unpickling of pathlib objects pickled in Python 3.13 (GH-133831)
In Python 3.13 (but not 3.12 or 3.14), pathlib classes are defined in
`pathlib._local` rather than `pathlib`. In hindsight this was a mistake,
but it was difficult to predict how the abstract/local split would pan out.
In this patch we re-introduce `pathlib._local` as a stub module that
re-exports the classes from `pathlib`. This allows path objects pickled in
3.13 to be unpicked in 3.14+
(cherry picked from commit f4e51f253ad6c27583438f6182c33cf368bfa45f)
Co-authored-by: Barney Gale <barney.gale@gmail.com>
Co-authored-by: Thomas Grainger <tagrain@gmail.com> Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com> Co-authored-by: Gregory P. Smith <greg@krypto.org> Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
[3.14] gh-140120: Refresh HACL* to fix an hmac memory leak (GH-140188) (#140192)
gh-140120: Refresh HACL* to fix an hmac memory leak (GH-140188)
This pulls an updated version of HACL* that fixes the memory leak reported in GH-140120, via an upstream fix.
(cherry picked from commit 3a81313019ba82152653bd86f6ffd87dfe339c60)
Co-authored-by: Jonathan Protzenko <jonathan.protzenko+github@gmail.com>
[3.14] gh-140041: Fix import of `ctypes` on Android and Cygwin when ABI flags are present (GH-140178) (#140180)
Use sysconfig to determine the full name of libpython, rather than hardcoding
a library name that doesn't have ABI flags.
(cherry picked from commit 7f371ed84ba471bb1b11e79b502f244a9c17ac84)
[3.14] gh-140061: Use `_PyObject_IsUniquelyReferenced()` to check if objects are uniquely referenced (gh-140062) (gh-140157)
The previous `Py_REFCNT(x) == 1` checks can have data races in the free
threaded build. `_PyObject_IsUniquelyReferenced(x)` is a more conservative
check that is safe in the free threaded build and is identical to
`Py_REFCNT(x) == 1` in the default GIL-enabled build.
(cherry picked from commit 32c264982ec67460642b907dabc3304019318291)
[3.14] GH-140058: Clear key and value if `PyTuple_New` fails in `dictiter_iternextitem` (GH-140059) (#140107)
GH-140058: Clear key and value if `PyTuple_New` fails in `dictiter_iternextitem` (GH-140059)
(cherry picked from commit ded59f7e8e93274488584574ff2336a98bc4eff6)
[3.14] gh-138772: Fix and improve documentation for turtle color functions (GH-139325) (GH-140047)
Use multiple signatures for clarity.
Explain different forms of bgcolor() in details.
Fix outdated docstrings.
(cherry picked from commit 525dcfe5236ee21b234cad16d2a3d5769e77e0ec)
[3.14] gh-139905: Provide suggestion in error message if `Generic.__init_subclass__` was not called (GH-139943) (#139955)
gh-139905: Provide suggestion in error message if `Generic.__init_subclass__` was not called (GH-139943)
(cherry picked from commit 5776d0d2e08f4d93dcd62d875bae8c1396a04ba4)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Kumar Aditya [Fri, 10 Oct 2025 17:06:02 +0000 (22:36 +0530)]
[3.14] gh-139894: fix incorrect sharing of current task while forking in `asyncio` (GH-139897) (#139913)
* [3.14] gh-139894: fix incorrect sharing of current task while forking in `asyncio` (GH-139897)
Fix incorrect sharing of current task with the forked child process by clearing thread state's current task and current loop in `PyOS_AfterFork_Child`.
(cherry picked from commit b881df47ff1adca515d1de04f689160ddae72142)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Co-authored-by: Victor Stinner <vstinner@python.org>
[3.14] gh-139065: Fix trailing space before long word in textwrap (GH-139070) (GH-139902)
Fix trailing space before a wrapped long word if the line length with
a space is exactly "width".
(cherry picked from commit 1c598e04361dbfc9cf465f3a02f83715c11b028c)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Emma Smith <emma@emmatyping.dev> Co-authored-by: Victor Stinner <vstinner@python.org>
[3.14] gh-139391: properly handle `signal.signal()` in `UnixConsole` when called from a non-main thread (GH-139392) (#139858)
gh-139391: properly handle `signal.signal()` in `UnixConsole` when called from a non-main thread (GH-139392)
(cherry picked from commit b8c8b8f1d30767e5358ffa93d41e6e27ca60570d)
[3.14] gh-139742: Add support for Python 3.14 t-string prefixes in IDLE colorizer and tests (GH-139756) (#139831)
gh-139742: Add support for Python 3.14 t-string prefixes in IDLE colorizer and tests (GH-139756)
Add 't' prefix to colorizer.py stringprefix regex to support Python 3.14 template strings.
Add t prefixes to test_colorizer.py source test text and adjust line numbers on test methods.
---------
(cherry picked from commit 6fd141834193e3dc2423e785d97eb127c972a70e)
projects / thirdparty / Python / cpython.git / log
