3.12.0a2 - Cpython — ContextQMD

.. date: 2022-11-04-09-29-36 .. gh-issue: 98433 .. nonce: l76c5G .. release date: 2022-11-14 .. section: Security

The IDNA codec decoder used on DNS hostnames by :mod:socket or :mod:asyncio related name resolution functions no longer involves a quadratic algorithm. This prevents a potential CPU denial of service if an out-of-spec excessive length hostname involving bidirectional characters were decoded. Some protocols such as :mod:urllib http :samp:3{xx} redirects potentially allow for an attacker to supply such a name.

Individual labels within an IDNA encoded DNS name will now raise an error early during IDNA decoding if they are longer than 1024 unicode characters given that each decoded DNS label must be 63 or fewer characters and the entire decoded DNS name is limited to 255. Only an application presenting a hostname or label consisting primarily of :rfc:3454 section 3.1 "Nothing" characters to be removed would run into of this new limit. See also :rfc:5894 section 6 and :rfc:3491.

.. date: 2022-10-26-21-04-23 .. gh-issue: 98739 .. nonce: keBWcY .. section: Security

Update bundled libexpat to 2.5.0

.. date: 2022-11-11-14-48-17 .. gh-issue: 81057 .. nonce: ik4iOv .. section: Core and Builtins

The docs clearly say that :c:data:PyImport_Inittab, :c:func:PyImport_AppendInittab, and :c:func:PyImport_ExtendInittab should not be used after :c:func:Py_Initialize has been called. We now enforce this for the two functions. Additionally, the runtime now uses an internal copy of :c:data:PyImport_Inittab, to guard against modification.

.. date: 2022-11-09-12-07-24 .. gh-issue: 99298 .. nonce: NeArAJ .. section: Core and Builtins

Fix an issue that could potentially cause incorrect error handling for some bytecode instructions.

.. date: 2022-11-08-17-47-10 .. gh-issue: 99254 .. nonce: RSvyFt .. section: Core and Builtins

The compiler now removes all unused constants from code objects (except the first one, which may be a docstring).

.. date: 2022-11-08-16-35-25 .. gh-issue: 99205 .. nonce: 2YOoFT .. section: Core and Builtins

Fix an issue that prevented :c:type:PyThreadState and :c:type:PyInterpreterState memory from being freed properly.

.. date: 2022-11-07-14-16-59 .. gh-issue: 81057 .. nonce: 3uKlLQ .. section: Core and Builtins

The 18 global C variables holding the state of the allocators have been moved to _PyRuntimeState. This is a strictly internal change with no change in behavior.

.. date: 2022-11-07-10-29-41 .. gh-issue: 99181 .. nonce: bfG4bI .. section: Core and Builtins

Fix failure in :keyword:except* <except_star> with unhashable exceptions.

.. date: 2022-11-07-08-17-12 .. gh-issue: 99204 .. nonce: Mf4hMD .. section: Core and Builtins

Fix calculation of :data:sys._base_executable when inside a POSIX virtual environment using copies of the python binary when the base installation does not provide the executable name used by the venv. Calculation will fall back to alternative names ("python<MAJOR>", "python<MAJOR>.<MINOR>").

.. date: 2022-11-06-22-59-02 .. gh-issue: 96055 .. nonce: TmQuJn .. section: Core and Builtins

Update :mod:faulthandler to emit an error message with the proper unexpected signal number. Patch by Donghee Na.

.. date: 2022-11-06-13-25-01 .. gh-issue: 99153 .. nonce: uE3CVL .. section: Core and Builtins

Fix location of :exc:SyntaxError for a :keyword:try block with both :keyword:except and :keyword:except* <except_star>.

.. date: 2022-11-06-00-47-11 .. gh-issue: 98686 .. nonce: DBDy6U .. section: Core and Builtins

Merge the adaptive opcode logic into each instruction's unquickened variant, and merge the logic in EXTENDED_ARG_QUICK into :opcode:EXTENDED_ARG. With these changes, the quickening that happens at code object creation is now only responsible for initializing warmup counters and inserting superinstructions.

.. date: 2022-11-06-00-17-58 .. gh-issue: 99103 .. nonce: bFA9BX .. section: Core and Builtins

Fix the error reporting positions of specialized traceback anchors when the source line contains Unicode characters.

.. date: 2022-11-05-18-36-27 .. gh-issue: 99139 .. nonce: cI9vV1 .. section: Core and Builtins

Improve the error suggestion for :exc:NameError exceptions for instances. Now if a :exc:NameError is raised in a method and the instance has an attribute that's exactly equal to the name in the exception, the suggestion will include self.<NAME> instead of the closest match in the method scope. Patch by Pablo Galindo

.. date: 2022-11-03-13-11-17 .. gh-issue: 98401 .. nonce: CBS4nv .. section: Core and Builtins

Octal escapes with value larger than 0o377 (ex: "\477"), deprecated in Python 3.11, now produce a :exc:SyntaxWarning, instead of :exc:DeprecationWarning. In a future Python version they will be eventually a :exc:SyntaxError. Patch by Victor Stinner.

.. date: 2022-11-02-17-02-06 .. gh-issue: 98401 .. nonce: y-dbVW .. section: Core and Builtins

A backslash-character pair that is not a valid escape sequence now generates a :exc:SyntaxWarning, instead of :exc:DeprecationWarning. For example, re.compile("\d+\.\d+") now emits a :exc:SyntaxWarning ("\d" is an invalid escape sequence), use raw strings for regular expression: re.compile(r"\d+\.\d+"). In a future Python version, :exc:SyntaxError will eventually be raised, instead of :exc:SyntaxWarning. Patch by Victor Stinner.

.. date: 2022-11-02-14-42-35 .. gh-issue: 96793 .. nonce: q0Oi74 .. section: Core and Builtins

Handle StopIteration and StopAsyncIteration raised in generator or coroutines in the bytecode, rather than in wrapping C code.

.. date: 2022-10-31-22-55-34 .. gh-issue: 98931 .. nonce: AoWZ-4 .. section: Core and Builtins

Improve the :exc:SyntaxError error message when the user types import x from y instead of from y import x. Patch by Pablo Galindo

.. date: 2022-10-31-21-01-35 .. gh-issue: 98852 .. nonce: MYaRN6 .. section: Core and Builtins

Fix subscription of type aliases containing bare generic types or types like :class:~typing.TypeVar: for example tuple[A, T][int] and tuple[TypeVar, T][int], where A is a generic type, and T is a type variable.

.. date: 2022-10-31-18-03-10 .. gh-issue: 98925 .. nonce: zpdjVd .. section: Core and Builtins

Lower the recursion depth for marshal on WASI to support (in-development) wasmtime 2.0.

.. date: 2022-10-28-14-52-55 .. gh-issue: 98783 .. nonce: iG0kMs .. section: Core and Builtins

Fix multiple crashes in debug mode when str subclasses are used instead of str itself.

.. date: 2022-10-28-13-59-51 .. gh-issue: 98811 .. nonce: XQypJa .. section: Core and Builtins

Use complete source locations to simplify detection of __future__ imports which are not at the beginning of the file. Also corrects the offset in the exception raised in one case, which was off by one and impeded highlighting.

.. date: 2022-10-28-09-42-51 .. gh-issue: 96793 .. nonce: ucBfWO .. section: Core and Builtins

Add specialization of :opcode:FOR_ITER for generators. Saves multiple layers of dispatch and checking to get from the :opcode:FOR_ITER instruction in the caller to the :opcode:RESUME in the generator.

.. date: 2022-10-27-16-42-16 .. gh-issue: 98762 .. nonce: Eb2kzg .. section: Core and Builtins

Fix source locations of :keyword:match sub-patterns.

.. date: 2022-10-24-10-30-30 .. gh-issue: 98586 .. nonce: Tha5Iy .. section: Core and Builtins

Added the methods :c:func:PyObject_Vectorcall and :c:func:PyObject_VectorcallMethod to the :ref:Limited API <stable> along with the auxiliary macro constant :c:macro:PY_VECTORCALL_ARGUMENTS_OFFSET.

The availability of these functions enables more efficient :PEP:590 vector calls from binary extension modules that avoid argument boxing/unboxing overheads.

.. date: 2022-10-21-11-28-53 .. gh-issue: 99257 .. nonce: nmcuf- .. section: Core and Builtins

Fix an issue where member descriptors (such as those for :attr:~object.__slots__) could behave incorrectly or crash instead of raising a :exc:TypeError when accessed via an instance of an invalid type.

.. date: 2022-10-19-23-54-43 .. gh-issue: 93143 .. nonce: 1wCYub .. section: Core and Builtins

Rather than changing :attr:~types.CodeType.co_code, the interpreter will now display a :exc:RuntimeWarning and assign :const:None to any fast locals that are left unbound after jumps or :keyword:del statements executed while tracing.

.. date: 2022-10-19-15-59-08 .. gh-issue: 96421 .. nonce: e22y3r .. section: Core and Builtins

When calling into Python code from C code, through :c:func:PyEval_EvalFrameEx or a related C-API function, a shim frame in inserted into the call stack. This occurs in the _PyEval_EvalFrameDefault() function. The extra frame should be invisible to all Python and most C extensions, but out-of-process profilers and debuggers need to be aware of it. These shim frames can be detected by checking frame->owner == FRAME_OWNED_BY_CSTACK.

Extensions implementing their own interpreters using PEP 523 need to be aware of this shim frame and the changes to the semantics of :opcode:RETURN_VALUE, :opcode:YIELD_VALUE, and :opcode:RETURN_GENERATOR, which now clear the frame.

.. date: 2022-10-19-01-01-08 .. gh-issue: 98415 .. nonce: ZS2eWh .. section: Build

Fix detection of MAC addresses for :mod:uuid on certain OSs. Patch by Chaim Sanders

.. date: 2022-10-16-13-26-46 .. gh-issue: 98686 .. nonce: D9Gu_Q .. section: Core and Builtins

Quicken all code objects, and specialize adaptive bytecode instructions more aggressively.

.. date: 2022-10-15-23-15-14 .. gh-issue: 92119 .. nonce: PMSwwG .. section: Core and Builtins

Print exception class name instead of its string representation when raising errors from :mod:ctypes calls.

.. date: 2022-10-15-22-25-20 .. gh-issue: 91058 .. nonce: Uo2kW- .. section: Core and Builtins

:exc:ImportError raised from failed from <module> import <name> now include suggestions for the value of <name> based on the available names in <module>. Patch by Pablo Galindo

.. date: 2022-09-13-14-07-06 .. gh-issue: 96793 .. nonce: 7DLRSm .. section: Core and Builtins

The :opcode:FOR_ITER now leaves the iterator on the stack on termination of the loop. This is to assist specialization of loops for generators.

.. date: 2022-09-09-16-32-58 .. gh-issue: 90716 .. nonce: z4yuYq .. section: Core and Builtins

Add _pylong.py module. It includes asymptotically faster algorithms that can be used for operations on integers with many digits. It is used by longobject.c to speed up some operations.

.. date: 2022-07-30-14-10-27 .. gh-issue: 95389 .. nonce: nSGEkG .. section: Core and Builtins

Expose :const:~socket.ETH_P_ALL and some of the :ref:ETHERTYPE_* constants <socket-ethernet-types> in :mod:socket. Patch by Noam Cohen.

.. date: 2022-06-10-16-37-44 .. gh-issue: 93696 .. nonce: 65BI2R .. section: Library

Allow :mod:pdb to locate source for frozen modules in the standard library.

.. date: 2022-11-12-15-45-51 .. gh-issue: 99418 .. nonce: FxfAXS .. section: Library

Fix bug in :func:urllib.parse.urlparse that causes URL schemes that begin with a digit, a plus sign, or a minus sign to be parsed incorrectly.

.. date: 2022-11-11-18-23-41 .. gh-issue: 94597 .. nonce: m6vMDK .. section: Library

Deprecate :class:asyncio.AbstractChildWatcher to be removed in Python 3.14. Patch by Kumar Aditya.

.. date: 2022-11-10-11-51-39 .. gh-issue: 99305 .. nonce: 6LzQc3 .. section: Library

Improve performance of :func:secrets.token_hex.

.. date: 2022-11-09-20-48-42 .. gh-issue: 74044 .. nonce: zBj26K .. section: Library

Fixed bug where :func:inspect.signature reported incorrect arguments for decorated methods.

.. date: 2022-11-09-12-16-35 .. gh-issue: 99275 .. nonce: klOqoL .. section: Library

Fix SystemError in :mod:ctypes when exception was not set during __initsubclass__.

.. date: 2022-11-09-08-40-52 .. gh-issue: 99277 .. nonce: J1P44O .. section: Library

Remove older version of _SSLProtocolTransport.get_write_buffer_limits in :mod:!asyncio.sslproto

.. date: 2022-11-08-11-15-37 .. gh-issue: 99248 .. nonce: 1vt8xI .. section: Library

fix negative numbers failing in verify()

.. date: 2022-11-06-12-44-51 .. gh-issue: 99155 .. nonce: vLZOzi .. section: Library

Fix :class:statistics.NormalDist pickle with 0 and 1 protocols.

.. date: 2022-11-05-23-16-15 .. gh-issue: 93464 .. nonce: ucd4vP .. section: Library

enum.auto() is now correctly activated when combined with other assignment values. E.g. ONE = auto(), 'some text' will now evaluate as (1, 'some text').

.. date: 2022-11-05-17-16-40 .. gh-issue: 99134 .. nonce: Msgspf .. section: Library

Update the bundled copy of pip to version 22.3.1.

.. date: 2022-11-03-15-28-07 .. gh-issue: 92584 .. nonce: m5ctkm .. section: Library

Remove the distutils package. It was deprecated in Python 3.10 by :pep:632 "Deprecate distutils module". For projects still using distutils and cannot be updated to something else, the setuptools project can be installed: it still provides distutils. Patch by Victor Stinner.

.. date: 2022-11-02-18-27-13 .. gh-issue: 98999 .. nonce: Ai2KDh .. section: Library

Now :mod:!_pyio is consistent with :mod:!_io in raising ValueError when executing methods over closed buffers.

.. date: 2022-11-02-05-54-02 .. gh-issue: 83004 .. nonce: 0v8iyw .. section: Library

Clean up refleak on failed module initialisation in :mod:!_zoneinfo

.. date: 2022-11-02-05-53-25 .. gh-issue: 83004 .. nonce: qc_KHr .. section: Library

Clean up refleaks on failed module initialisation in :mod:!_pickle

.. date: 2022-11-02-05-52-36 .. gh-issue: 83004 .. nonce: LBl79O .. section: Library

Clean up refleak on failed module initialisation in :mod:!_io.

.. date: 2022-10-31-12-34-03 .. gh-issue: 98897 .. nonce: rgNn4x .. section: Library

Fix memory leak in :func:math.dist when both points don't have the same dimension. Patch by Kumar Aditya.

.. date: 2022-10-30-22-42-48 .. gh-issue: 98878 .. nonce: fgrykp .. section: Library

Use the frame bound builtins when offering a name suggestion in :mod:traceback to prevent crashing when __builtins__ is not a dict.

.. date: 2022-10-30-15-26-33 .. gh-issue: 98139 .. nonce: qtm-9T .. section: Library

In :mod:importlib._bootstrap, enhance namespace package repr to <module 'x' (namespace) from ['path']>.

.. date: 2022-10-29-09-42-20 .. gh-issue: 90352 .. nonce: t8QEPt .. section: Library

Fix _SelectorDatagramTransport to inherit from :class:~asyncio.DatagramTransport in :mod:asyncio. Patch by Kumar Aditya.

.. date: 2022-10-29-03-40-18 .. gh-issue: 98793 .. nonce: WSPB4A .. section: Library

Fix argument typechecks in :func:!_overlapped.WSAConnect and :func:!_overlapped.Overlapped.WSASendTo functions.

.. date: 2022-10-28-23-44-17 .. gh-issue: 98744 .. nonce: sGHDWm .. section: Library

Prevent crashing in :mod:traceback when retrieving the byte-offset for some source files that contain certain unicode characters.

.. date: 2022-10-27-12-56-38 .. gh-issue: 98740 .. nonce: ZoqqGM .. section: Library

Fix internal error in the :mod:re module which in very rare circumstances prevented compilation of a regular expression containing a :ref:conditional expression <re-conditional-expression> without the "else" branch.

.. date: 2022-10-26-07-51-55 .. gh-issue: 98703 .. nonce: 0hW773 .. section: Library

Fix :meth:asyncio.StreamWriter.drain to call protocol.connection_lost callback only once on Windows.

.. date: 2022-10-25-20-17-34 .. gh-issue: 98624 .. nonce: YQUPFy .. section: Library

Add a mutex to unittest.mock.NonCallableMock to protect concurrent access to mock attributes.

.. date: 2022-10-25-07-00-31 .. gh-issue: 98658 .. nonce: nGABW9 .. section: Library

The :class:array.array class now supports subscripting, making it a :term:generic type.

.. date: 2022-10-15-10-43-45 .. gh-issue: 98284 .. nonce: SaVHTd .. section: Library

Improved :class:TypeError message for undefined abstract methods of a :class:abc.ABC instance. The names of the missing methods are surrounded by single-quotes to highlight them.

.. date: 2022-10-10-07-07-31 .. gh-issue: 96151 .. nonce: K9fwoq .. section: Library

Allow BUILTINS to be a valid field name for frozen dataclasses.

.. date: 2022-10-08-19-39-27 .. gh-issue: 98086 .. nonce: y---WC .. section: Library

Make sure patch.dict() can be applied on async functions.

.. date: 2022-09-05-17-08-56 .. gh-issue: 72719 .. nonce: jUpzF3 .. section: Library

Remove modules :mod:!asyncore and :mod:!asynchat, which were deprecated by :pep:594.

.. date: 2022-08-23-03-13-18 .. gh-issue: 96192 .. nonce: TJywOF .. section: Library

Fix handling of bytes :term:path-like objects <path-like object> in :func:os.ismount.

.. date: 2022-06-23-15-36-49 .. gh-issue: 94172 .. nonce: DzQk0s .. section: Library

:mod:ftplib: Remove the FTP_TLS.ssl_version class attribute: use the context parameter instead. Patch by Victor Stinner

.. date: 2022-06-23-15-31-49 .. gh-issue: 94172 .. nonce: AXE2IZ .. section: Library

Remove the keyfile and certfile parameters from the :mod:ftplib, :mod:imaplib, :mod:poplib and :mod:smtplib modules, and the key_file, cert_file and check_hostname parameters from the :mod:http.client module, all deprecated since Python 3.6. Use the context parameter (ssl_context in :mod:imaplib) instead. Patch by Victor Stinner.

.. date: 2022-06-14-22-46-05 .. gh-issue: 83638 .. nonce: 73xfGK .. section: Library

Add the :attr:~sqlite3.Connection.autocommit attribute to :class:sqlite3.Connection and the autocommit parameter to :func:sqlite3.connect to control :pep:249-compliant :ref:transaction handling <sqlite3-transaction-control-autocommit>. Patch by Erlend E. Aasland.

.. date: 2022-05-08-08-47-32 .. gh-issue: 92452 .. nonce: 3pNHe6 .. section: Library

Fixed a race condition that could cause :func:sysconfig.get_config_var to incorrectly return :const:None in multi-threaded programs.

.. date: 2022-05-03-11-32-29 .. gh-issue: 91803 .. nonce: pI4Juv .. section: Library

Fix an error when using a method of objects mocked with :func:unittest.mock.create_autospec after it was sealed with :func:unittest.mock.seal function.

.. bpo: 38523 .. date: 2020-10-23-22-20-52 .. nonce: CrkxLh .. section: Library

:func:shutil.copytree now applies the ignore_dangling_symlinks argument recursively.

.. bpo: 40358 .. date: 2020-04-30-02-15-08 .. nonce: A4ygqe .. section: Library

Add walk_up argument in :meth:pathlib.PurePath.relative_to.

.. bpo: 36267 .. date: 2019-09-03-15-45-19 .. nonce: z42Ex7 .. section: Library

Fix IndexError in :class:argparse.ArgumentParser when a store_true action is given an explicit argument.

.. date: 2022-10-29-02-33-46 .. gh-issue: 98832 .. nonce: DudEIH .. section: Documentation

Changes wording of docstring for :func:pathlib.Path.iterdir.

.. date: 2022-10-06-13-00-28 .. gh-issue: 97966 .. nonce: fz7kFg .. section: Documentation

Update uname docs to clarify the special nature of the platform attribute and to indicate when it became late-bound.

.. date: 2022-10-31-14-47-49 .. gh-issue: 98903 .. nonce: 7KinCV .. section: Tests

The Python test suite now fails with exit code 4 if no tests ran. It should help detecting typos in test names and test methods.

.. date: 2022-10-26-15-19-20 .. gh-issue: 98713 .. nonce: Lnu32R .. section: Tests

Fix a bug in the :mod:typing tests where a test relying on CPython-specific implementation details was not decorated with @cpython_only and was not skipped on other implementations.

.. date: 2022-10-15-07-46-48 .. gh-issue: 87390 .. nonce: asR-Zo .. section: Tests

Add tests for star-unpacking with PEP 646, and some other miscellaneous PEP 646 tests.

.. date: 2022-10-12-14-57-06 .. gh-issue: 96853 .. nonce: ANe-bw .. section: Tests

Added explicit coverage of Py_Initialize (and hence Py_InitializeEx) back to the embedding tests (all other embedding tests migrated to Py_InitializeFromConfig in Python 3.11)

.. bpo: 34272 .. date: 2018-07-29-15-59-51 .. nonce: lVX2uR .. section: Tests

Some C API tests were moved into the new Lib/test/test_capi/ directory.

.. date: 2022-11-04-02-58-10 .. gh-issue: 99086 .. nonce: DV_4Br .. section: Build

Fix -Wimplicit-int compiler warning in :program:configure check for PTHREAD_SCOPE_SYSTEM.

.. date: 2022-11-02-19-25-07 .. gh-issue: 99016 .. nonce: R05NkD .. section: Build

Fix build with PYTHON_FOR_REGEN=python3.8.

.. date: 2022-11-02-18-45-35 .. gh-issue: 97731 .. nonce: zKpTlj .. section: Build

Specify the full path to the source location for make docclean (needed for cross-builds).

.. date: 2022-11-02-10-56-40 .. gh-issue: 98949 .. nonce: 3SRD8C .. section: Build

Drop unused build dependency on readelf.

.. date: 2022-11-01-21-45-58 .. gh-issue: 98989 .. nonce: tMxbdB .. section: Build

Use python3.11, if available, for regeneration and freezing.

.. date: 2022-10-28-22-24-26 .. gh-issue: 98831 .. nonce: IXRCRX .. section: Build

Add new tooling, in Tools/cases_generator, to generate the interpreter switch statement from a list of opcode definitions. This only affects adding, modifying or removing instruction definitions. The instruction definitions now live in Python/bytecodes.c, in the form of a custom DSL (under development) <https://github.com/faster-cpython/ideas/blob/main/3.12/interpreter_definition.md>__. The tooling reads this file and writes Python/generated_cases.c.h, which is then included by Python/ceval.c to provide most of the cases of the main interpreter switch.

.. date: 2022-10-28-18-53-40 .. gh-issue: 98817 .. nonce: oPqrtt .. section: Build

Remove PCbuild/lib.pyproj: it's not used for anything, is only a minor convenience for Visual Studio users (who probably mostly don't even know about it), and it takes a lot of maintenance effort to keep updated.

.. date: 2022-10-27-19-47-31 .. gh-issue: 98776 .. nonce: lt_UOG .. section: Build

Fix make regen-test-levenshtein for out-of-tree builds.

.. date: 2022-10-26-12-37-52 .. gh-issue: 98707 .. nonce: eVXGEx .. section: Build

Don't use vendored libmpdec headers if :option:--with-system-libmpdec is passed to :program:configure. Don't use vendored libexpat headers if :option:--with-system-expat is passed to :program:configure.

.. date: 2022-11-01-11-07-33 .. gh-issue: 98689 .. nonce: 0f6e_N .. section: Windows

Update Windows builds to zlib v1.2.13. v1.2.12 has :cve:2022-37434, but the vulnerable inflateGetHeader API is not used by Python.

.. date: 2022-11-01-00-37-13 .. gh-issue: 98790 .. nonce: fpaPAx .. section: Windows

Assumes that a missing DLLs directory means that standard extension modules are in the executable's directory.

.. date: 2022-10-27-20-30-16 .. gh-issue: 98745 .. nonce: v06p4r .. section: Windows

Update :file:py.exe launcher to install 3.11 by default and 3.12 on request.

.. date: 2022-10-26-17-43-09 .. gh-issue: 98692 .. nonce: bOopfZ .. section: Windows

Fix the :ref:launcher ignoring unrecognized shebang lines instead of treating them as local paths

.. date: 2022-10-25-10-34-17 .. gh-issue: 94328 .. nonce: 19NhdU .. section: Windows

Update Windows installer to use SQLite 3.39.4.

.. date: 2022-10-25-10-32-23 .. gh-issue: 94328 .. nonce: W3YNC_ .. section: macOS

Update macOS installer to SQLite 3.39.4.

.. date: 2022-11-04-16-13-35 .. gh-issue: 98724 .. nonce: p0urWO .. section: C API

The :c:macro:Py_CLEAR, :c:macro:Py_SETREF and :c:macro:Py_XSETREF macros now only evaluate their argument once. If the argument has side effects, these side effects are no longer duplicated. Patch by Victor Stinner.

.. date: 2022-11-03-17-46-41 .. gh-issue: 98978 .. nonce: KJjBvv .. section: C API

Fix use-after-free in Py_SetPythonHome(NULL), Py_SetProgramName(NULL) and _Py_SetProgramFullPath(NULL) function calls. Issue reported by Benedikt Reinartz. Patch by Victor Stinner.

.. date: 2022-10-25-17-50-43 .. gh-issue: 98410 .. nonce: NSXYfm .. section: C API

Add getbufferproc and releasebufferproc to the stable API.

.. date: 2022-10-24-12-09-17 .. gh-issue: 98610 .. nonce: PLX2Np .. section: C API

Some configurable capabilities of sub-interpreters have changed. They always allow subprocesses (:mod:subprocess) now, whereas before subprocesses could be optionally disallowed for a sub-interpreter. Instead :func:os.exec can now be disallowed. Disallowing daemon threads is now supported. Disallowing all threads is still allowed, but is never done by default. Note that the optional restrictions are only available through _Py_NewInterpreterFromConfig(), which isn't a public API. They do not affect the main interpreter, nor :c:func:Py_NewInterpreter.

.. date: 2022-10-24-11-26-55 .. gh-issue: 98608 .. nonce: _Q2lNV .. section: C API

A _PyInterpreterConfig has been added and _Py_NewInterpreter() has been renamed to _Py_NewInterpreterFromConfig(). The "isolated_subinterpreters" argument is now a granular config that captures the previous behavior. Note that this is all "private" API.

.. date: 2022-10-16-15-00-25 .. gh-issue: 96853 .. nonce: V0wiXP .. section: C API

Py_InitializeEx now correctly calls PyConfig_Clear after initializing the interpreter (the omission didn't cause a memory leak only because none of the dynamically allocated config fields are populated by the wrapper function)

.. date: 2022-08-05-15-26-12 .. gh-issue: 91248 .. nonce: ujirJJ .. section: C API

Add :c:func:PyFrame_GetVar and :c:func:PyFrame_GetVarString functions to get a frame variable by its name. Patch by Victor Stinner.