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+++++++++++ Python News +++++++++++ What's New in Python 3.10.6 final? ================================== *Release date: 2022-08-01* Security -------- - gh-issue-87389: :mod:`http.server`: Fix an open redirection vulnerability in the HTTP server when an URI path starts with ``//``. Vulnerability discovered, and initial fix proposed, by Hamza Avvan. - gh-issue-92888: Fix ``memoryview`` use after free when accessing the backing buffer in certain cases. Core and Builtins ----------------- - gh-issue-95355: ``_PyPegen_Parser_New`` now properly detects token memory allocation errors. Patch by Honglin Zhu. - gh-issue-94938: Fix error detection in some builtin functions when keyword argument name is an instance of a str subclass with overloaded ``__eq__`` and ``__hash__``. Previously it could cause SystemError or other undesired behavior. - gh-issue-94949: :func:`ast.parse` will no longer parse parenthesized context managers when passed ``feature_version`` less than ``(3, 9)``. Patch by Shantanu Jain. - gh-issue-94947: :func:`ast.parse` will no longer parse assignment expressions when passed ``feature_version`` less than ``(3, 8)``. Patch by Shantanu Jain. - gh-issue-94869: Fix the column offsets for some expressions in multi-line f-strings :mod:`ast` nodes. Patch by Pablo Galindo. - gh-issue-91153: Fix an issue where a :class:`bytearray` item assignment could crash if it's resized by the new value's :meth:`__index__` method. - gh-issue-94329: Compile and run code with unpacking of extremely large sequences (1000s of elements). Such code failed to compile. It now compiles and runs correctly. - gh-issue-94360: Fixed a tokenizer crash when reading encoded files with syntax errors from ``stdin`` with non utf-8 encoded text. Patch by Pablo Galindo - gh-issue-94192: Fix error for dictionary literals with invalid expression as value. - gh-issue-93964: Strengthened compiler overflow checks to prevent crashes when compiling very large source files. - gh-issue-93671: Fix some exponential backtrace case happening with deeply nested sequence patterns in match statements. Patch by Pablo Galindo - gh-issue-93021: Fix the :attr:`__text_signature__` for :meth:`__get__` methods implemented in C. Patch by Jelle Zijlstra. - gh-issue-92930: Fixed a crash in ``_pickle.c`` from mutating collections during ``__reduce__`` or ``persistent_id``. - gh-issue-92914: Always round the allocated size for lists up to the nearest even number. - gh-issue-92858: Improve error message for some suites with syntax error before ':' Library ------- - gh-issue-95339: Update bundled pip to 22.2.1. - gh-issue-95045: Fix GC crash when deallocating ``_lsprof.Profiler`` by untracking it before calling any callbacks. Patch by Kumar Aditya. - gh-issue-95087: Fix IndexError in parsing invalid date in the :mod:`email` module. - gh-issue-95199: Upgrade bundled setuptools to 63.2.0. - gh-issue-95194: Upgrade bundled pip to 22.2. - gh-issue-93899: Fix check for existence of :data:`os.EFD_CLOEXEC`, :data:`os.EFD_NONBLOCK` and :data:`os.EFD_SEMAPHORE` flags on older kernel versions where these flags are not present. Patch by Kumar Aditya. - gh-issue-95166: Fix :meth:`concurrent.futures.Executor.map` to cancel the currently waiting on future on an error - e.g. TimeoutError or KeyboardInterrupt. - gh-issue-93157: Fix :mod:`fileinput` module didn't support ``errors`` option when ``inplace`` is true. - gh-issue-94821: Fix binding of unix socket to empty address on Linux to use an available address from the abstract namespace, instead of "\0". - gh-issue-94736: Fix crash when deallocating an instance of a subclass of ``_multiprocessing.SemLock``. Patch by Kumar Aditya. - gh-issue-94637: :meth:`SSLContext.set_default_verify_paths` now releases the GIL around ``SSL_CTX_set_default_verify_paths`` call. The function call performs I/O and CPU intensive work. - gh-issue-94510: Re-entrant calls to :func:`sys.setprofile` and :func:`sys.settrace` now raise :exc:`RuntimeError`. Patch by Pablo Galindo. - gh-issue-92336: Fix bug where :meth:`linecache.getline` fails on bad files with :exc:`UnicodeDecodeError` or :exc:`SyntaxError`. It now returns an empty string as per the documentation. - gh-issue-89988: Fix memory leak in :class:`pickle.Pickler` when looking up :attr:`dispatch_table`. Patch by Kumar Aditya. - gh-issue-94254: Fixed types of :mod:`struct` module to be immutable. Patch by Kumar Aditya. - gh-issue-94245: Fix pickling and copying of ``typing.Tuple[()]``. - gh-issue-94207: Made :class:`_struct.Struct` GC-tracked in order to fix a reference leak in the :mod:`_struct` module. - gh-issue-94101: Manual instantiation of :class:`ssl.SSLSession` objects is no longer allowed as it lead to misconfigured instances that crashed the interpreter when attributes where accessed on them. - gh-issue-84753: :func:`inspect.iscoroutinefunction`, :func:`inspect.isgeneratorfunction`, and :func:`inspect.isasyncgenfunction` now properly return ``True`` for duck-typed function-like objects like instances of :class:`unittest.mock.AsyncMock`. This makes :func:`inspect.iscoroutinefunction` consistent with the behavior of :func:`asyncio.iscoroutinefunction`. Patch by Mehdi ABAAKOUK. - gh-issue-83499: Fix double closing of file description in :mod:`tempfile`. - gh-issue-79512: Fixed names and ``__module__`` value of :mod:`weakref` classes :class:`~weakref.ReferenceType`, :class:`~weakref.ProxyType`, :class:`~weakref.CallableProxyType`. It makes them pickleable. - gh-issue-90494: :func:`copy.copy` and :func:`copy.deepcopy` now always raise a TypeError if ``__reduce__()`` returns a tuple with length 6 instead of silently ignore the 6th item or produce incorrect result. - gh-issue-90549: Fix a multiprocessing bug where a global named resource (such as a semaphore) could leak when a child process is spawned (as opposed to forked). - gh-issue-79579: :mod:`sqlite3` now correctly detects DML queries with leading comments. Patch by Erlend E. Aasland. - gh-issue-93421: Update :data:`sqlite3.Cursor.rowcount` when a DML statement has run to completion. This fixes the row count for SQL queries like ``UPDATE ... RETURNING``. Patch by Erlend E. Aasland. - gh-issue-91810: Suppress writing an XML declaration in open files in ``ElementTree.write()`` with ``encoding='unicode'`` and ``xml_declaration=None``. - gh-issue-93353: Fix the :func:`importlib.resources.as_file` context manager to remove the temporary file if destroyed late during Python finalization: keep a local reference to the :func:`os.remove` function. Patch by Victor Stinner. - gh-issue-83658: Make :class:`multiprocessing.Pool` raise an exception if ``maxtasksperchild`` is not ``None`` or a positive int. - gh-issue-74696: :func:`shutil.make_archive` no longer temporarily changes the current working directory during creation of standard ``.zip`` or tar archives. - gh-issue-91577: Move imports in :class:`~multiprocessing.SharedMemory` methods to module level so that they can be executed late in python finalization. - bpo-47231: Fixed an issue with inconsistent trailing slashes in tarfile longname directories. - bpo-46755: In :class:`QueueHandler`, clear ``stack_info`` from :class:`LogRecord` to prevent stack trace from being written twice. - bpo-46053: Fix OSS audio support on NetBSD. - bpo-46197: Fix :mod:`ensurepip` environment isolation for subprocess running ``pip``. - bpo-45924: Fix :mod:`asyncio` incorrect traceback when future's exception is raised multiple times. Patch by Kumar Aditya. - bpo-34828: :meth:`sqlite3.Connection.iterdump` now handles databases that use ``AUTOINCREMENT`` in one or mo