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+++ b/Misc/NEWS.d/3.9.1rc1.rst
@@ -0,0 +1,948 @@
+.. bpo: 42103
+.. date: 2020-10-23-19-19-30
+.. nonce: cILT66
+.. release date: 2020-11-24
+.. section: Security
+
+Prevented potential DoS attack via CPU and RAM exhaustion when processing
+malformed Apple Property List files in binary format.
+
+..
+
+.. bpo: 42051
+.. date: 2020-10-19-10-56-27
+.. nonce: EU_B7u
+.. section: Security
+
+The :mod:`plistlib` module no longer accepts entity declarations in XML
+plist files to avoid XML vulnerabilities. This should not affect users as
+entity declarations are not used in regular plist files.
+
+..
+
+.. bpo: 40791
+.. date: 2020-05-28-06-06-47
+.. nonce: QGZClX
+.. section: Security
+
+Add ``volatile`` to the accumulator variable in ``hmac.compare_digest``,
+making constant-time-defeating optimizations less likely.
+
+..
+
+.. bpo: 41686
+.. date: 2020-11-17-16-25-50
+.. nonce: hX77kL
+.. section: Core and Builtins
+
+On Windows, the ``SIGINT`` event, ``_PyOS_SigintEvent()``, is now created
+even if Python is configured to not install signal handlers (if
+:c:member:`PyConfig.install_signal_handlers` equals to 0, or
+``Py_InitializeEx(0)``).
+
+..
+
+.. bpo: 42381
+.. date: 2020-11-16-23-45-56
+.. nonce: G4AWxL
+.. section: Core and Builtins
+
+Allow assignment expressions in set literals and set comprehensions as per
+PEP 572. Patch by Pablo Galindo.
+
+..
+
+.. bpo: 42374
+.. date: 2020-11-16-17-57-09
+.. nonce: t7np1E
+.. section: Core and Builtins
+
+Fix a regression introduced by the new parser, where an unparenthesized
+walrus operator was not allowed within generator expressions.
+
+..
+
+.. bpo: 42296
+.. date: 2020-11-13-13-53-11
+.. nonce: DuGrLJ
+.. section: Core and Builtins
+
+On Windows, fix a regression in signal handling which prevented to interrupt
+a program using CTRL+C. The signal handler can be run in a thread different
+than the Python thread, in which case the test deciding if the thread can
+handle signals is wrong.
+
+..
+
+.. bpo: 42332
+.. date: 2020-11-12-23-16-14
+.. nonce: fEQIdk
+.. section: Core and Builtins
+
+:class:`types.GenericAlias` objects can now be the targets of weakrefs.
+
+..
+
+.. bpo: 42218
+.. date: 2020-10-31-17-50-23
+.. nonce: Dp_Z3v
+.. section: Core and Builtins
+
+Fixed a bug in the PEG parser that was causing crashes in debug mode. Now
+errors are checked in left-recursive rules to avoid cases where such errors
+do not get handled in time and appear as long-distance crashes in other
+places.
+
+..
+
+.. bpo: 42214
+.. date: 2020-10-30-22-16-30
+.. nonce: lXskM_
+.. section: Core and Builtins
+
+Fixed a possible crash in the PEG parser when checking for the '!=' token in
+the ``barry_as_flufl`` rule. Patch by Pablo Galindo.
+
+..
+
+.. bpo: 42143
+.. date: 2020-10-27-21-34-05
+.. nonce: N6KXUO
+.. section: Core and Builtins
+
+Fix handling of errors during creation of ``PyFunctionObject``, which
+resulted in operations on uninitialized memory. Patch by Yonatan
+Goldschmidt.
+
+..
+
+.. bpo: 41659
+.. date: 2020-10-27-18-32-49
+.. nonce: d4a-8o
+.. section: Core and Builtins
+
+Fix a bug in the parser, where a curly brace following a `primary` didn't
+fail immediately. This led to invalid expressions like `a {b}` to throw a
+:exc:`SyntaxError` with a wrong offset, or invalid expressions ending with a
+curly brace like `a {` to not fail immediately in the REPL.
+
+..
+
+.. bpo: 42150
+.. date: 2020-10-25-21-14-18
+.. nonce: b70u_T
+.. section: Core and Builtins
+
+Fix possible buffer overflow in the new parser when checking for
+continuation lines. Patch by Pablo Galindo.
+
+..
+
+.. bpo: 42123
+.. date: 2020-10-23-02-43-24
+.. nonce: 64gJWC
+.. section: Core and Builtins
+
+Run the parser two times. On the first run, disable all the rules that only
+generate better error messages to gain performance. If there's a parse
+failure, run the parser a second time with those enabled.
+
+..
+
+.. bpo: 41910
+.. date: 2020-10-21-14-40-54
+.. nonce: CzBMit
+.. section: Core and Builtins
+
+Document the default implementation of `object.__eq__`.
+
+..
+
+.. bpo: 42057
+.. date: 2020-10-20-11-36-14
+.. nonce: BI-OoV
+.. section: Core and Builtins
+
+Fix peephole optimizer misoptimize conditional jump + JUMP_IF_NOT_EXC_MATCH
+pair.
+
+..
+
+.. bpo: 41984
+.. date: 2020-10-14-16-19-43
+.. nonce: SEtKMr
+.. section: Core and Builtins
+
+The garbage collector now tracks all user-defined classes. Patch by Brandt
+Bucher.
+
+..
+
+.. bpo: 41993
+.. date: 2020-10-10-13-53-52
+.. nonce: YMzixQ
+.. section: Core and Builtins
+
+Fixed potential issues with removing not completely initialized module from
+``sys.modules`` when import fails.
+
+..
+
+.. bpo: 41979
+.. date: 2020-10-09-10-55-50
+.. nonce: ImXIk2
+.. section: Core and Builtins
+
+Star-unpacking is now allowed for with item's targets in the PEG parser.
+
+..
+
+.. bpo: 41909
+.. date: 2020-10-04-10-55-12
+.. nonce: BqHPcm
+.. section: Core and Builtins
+
+Fixed stack overflow in :func:`issubclass` and :func:`isinstance` when
+getting the ``__bases__`` attribute leads to infinite recursion.
+
+..
+
+.. bpo: 41894
+.. date: 2020-10-02-11-35-33
+.. nonce: ffmtOt
+.. section: Core and Builtins
+
+When loading a native module and a load failure occurs, prevent a possible
+UnicodeDecodeError when not running in a UTF-8 locale by decoding the load
+error message using the current locale's encoding.
+
+..
+
+.. bpo: 39934
+.. date: 2020-09-24-12-15-45
+.. nonce: YVHTCF
+.. section: Core and Builtins
+
+Correctly count control blocks in 'except' in compiler. Ensures that a
+syntax error, rather a fatal error, occurs for deeply nested, named
+exception handlers.
+
+..
+
+.. bpo: 42328
+.. date: 2020-11-15-17-02-00
+.. nonce: bqpPlR
+.. section: Library
+
+Fixed :meth:`tkinter.ttk.Style.map`. The function accepts now the
+representation of the default state as empty sequence (as returned by
+``Style.map()``). The structure of the result is now the same on all
+platform and does not depend on the value of ``wantobjects``.
+
+..
+
+.. bpo: 42345
+.. date: 2020-11-15-15-23-34
+.. nonce: hiIR7x
+.. section: Library
+
+Fix various issues with ``typing.Literal`` parameter handling (flatten,
+deduplicate, use type to cache key). Patch provided by Yurii Karabas.
+
+..
+
+.. bpo: 42350
+.. date: 2020-11-13-18-53-50
+.. nonce: rsql7V
+.. section: Library
+
+Fix the :class:`threading.Thread` class at fork: do nothing if the thread is
+already stopped (ex: fork called at Python exit). Previously, an error was
+logged in the child process.
+
+..
+
+.. bpo: 42014
+.. date: 2020-11-10-15-40-56
+.. nonce: ShM37l
+.. section: Library
+
+The ``onerror`` callback from ``shutil.rmtree`` now receives correct
+function when ``os.open`` fails.
+
+..
+
+.. bpo: 42237
+.. date: 2020-11-10-14-27-49
+.. nonce: F363jO
+.. section: Library
+
+Fix `os.sendfile()` on illumos.
+
+..
+
+.. bpo: 42249
+.. date: 2020-11-03-09-22-56
+.. nonce: vfNO2u
+.. section: Library
+
+Fixed writing binary Plist files larger than 4 GiB.
+
+..
+
+.. bpo: 35455
+.. date: 2020-11-02-14-10-48
+.. nonce: Q1xTIo
+.. section: Library
+
+On Solaris, :func:`~time.thread_time` is now implemented with
+``gethrvtime()`` because ``clock_gettime(CLOCK_THREAD_CPUTIME_ID)`` is not
+always available. Patch by Jakub Kulik.
+
+..
+
+.. bpo: 42233
+.. date: 2020-11-02-01-31-15
+.. nonce: YxRj-h
+.. section: Library
+
+The :func:`repr` of :mod:`typing` types containing :ref:`Generic Alias Types
+<types-genericalias>` previously did not show the parameterized types in the
+``GenericAlias``.  They have now been changed to do so.
+
+..
+
+.. bpo: 41754
+.. date: 2020-11-01-15-07-20
+.. nonce: DraSZh
+.. section: Library
+
+webbrowser: Ignore *NotADirectoryError* when calling ``xdg-settings``.
+
+..
+
+.. bpo: 29566
+.. date: 2020-10-31-13-28-36
+.. nonce: 6aDbty
+.. section: Library
+
+``binhex.binhex()`` consisently writes macOS 9 line endings.
+
+..
+
+.. bpo: 42183
+.. date: 2020-10-29-11-17-35
+.. nonce: 50ZcIi
+.. section: Library
+
+Fix a stack overflow error for asyncio Task or Future repr().
+
+The overflow occurs under some circumstances when a Task or Future
+recursively returns itself.
+
+..
+
+.. bpo: 42146
+.. date: 2020-10-25-19-25-02
+.. nonce: 6A8uvS
+.. section: Library
+
+Fix memory leak in :func:`subprocess.Popen` in case an uid (gid) specified
+in `user` (`group`, `extra_groups`) overflows `uid_t` (`gid_t`).
+
+..
+
+.. bpo: 42140
+.. date: 2020-10-24-04-02-36
+.. nonce: miLqvb
+.. section: Library
+
+Improve asyncio.wait function to create the futures set just one time.
+
+..
+
+.. bpo: 42103
+.. date: 2020-10-23-19-20-14
+.. nonce: C5obK2
+.. section: Library
+
+:exc:`~plistlib.InvalidFileException` and :exc:`RecursionError` are now the
+only errors caused by loading malformed binary Plist file (previously
+ValueError and TypeError could be raised in some specific cases).
+
+..
+
+.. bpo: 41052
+.. date: 2020-10-21-23-45-02
+.. nonce: 3N7J2J
+.. section: Library
+
+Pickling heap types implemented in C with protocols 0 and 1 raises now an
+error instead of producing incorrect data.
+
+..
+
+.. bpo: 41491
+.. date: 2020-10-19-14-02-09
+.. nonce: d1BUWH
+.. section: Library
+
+plistlib: fix parsing XML plists with hexadecimal integer values
+
+..
+
+.. bpo: 42065
+.. date: 2020-10-17-23-17-18
+.. nonce: 85BsRA
+.. section: Library
+
+Fix an incorrectly formatted error from :meth:`_codecs.charmap_decode` when
+called with a mapped value outside the range of valid Unicode code points.
+PR by Max Bernstein.
+
+..
+
+.. bpo: 41966
+.. date: 2020-10-17-07-52-53
+.. nonce: gwEQRZ
+.. section: Library
+
+Fix pickling pure Python :class:`datetime.time` subclasses. Patch by Dean
+Inwood.
+
+..
+
+.. bpo: 41976
+.. date: 2020-10-08-18-22-28
+.. nonce: Svm0wb
+.. section: Library
+
+Fixed a bug that was causing :func:`ctypes.util.find_library` to return
+``None`` when triying to locate a library in an environment when gcc>=9 is
+available and ``ldconfig`` is not. Patch by Pablo Galindo
+
+..
+
+.. bpo: 41900
+.. date: 2020-10-01-10-50-12
+.. nonce: Cho7oh
+.. section: Library
+
+C14N 2.0 serialisation in xml.etree.ElementTree failed for unprefixed
+attributes when a default namespace was defined.
+
+..
+
+.. bpo: 41840
+.. date: 2020-09-23-23-17-59
+.. nonce: QRFr4L
+.. section: Library
+
+Fix a bug in the :mod:`symtable` module that was causing module-scope global
+variables to not be reported as both local and global. Patch by Pablo
+Galindo.
+
+..
+
+.. bpo: 41831
+.. date: 2020-09-22-11-07-50
+.. nonce: k-Eop_
+.. section: Library
+
+``str()`` for the ``type`` attribute of the ``tkinter.Event`` object always
+returns now the numeric code returned by Tk instead of the name of the event
+type.
+
+..
+
+.. bpo: 41817
+.. date: 2020-09-22-00-23-30
+.. nonce: bnh-VG
+.. section: Library
+
+fix `tkinter.EventType` Enum so all members are strings, and none are tuples
+
+..
+
+.. bpo: 41815
+.. date: 2020-09-19-23-14-54
+.. nonce: RNpuX3
+.. section: Library
+
+Fix SQLite3 segfault when backing up closed database. Patch contributed by
+Peter David McCormick.
+
+..
+
+.. bpo: 41316
+.. date: 2020-07-28-12-08-58
+.. nonce: bSCbK4
+.. section: Library
+
+Fix the :mod:`tarfile` module to write only basename of TAR file to GZIP
+compression header.
+
+..
+
+.. bpo: 16936
+.. date: 2020-07-08-09-45-00
+.. nonce: z8o8Pn
+.. section: Library
+
+Allow ``ctypes.wintypes`` to be imported on non-Windows systems.
+
+..
+
+.. bpo: 40592
+.. date: 2020-05-14-16-01-34
+.. nonce: Cmk855
+.. section: Library
+
+:func:`shutil.which` now ignores empty entries in :envvar:`PATHEXT` instead
+of treating them as a match.
+
+..
+
+.. bpo: 40550
+.. date: 2020-05-08-21-30-54
+.. nonce: i7GWkb
+.. section: Library
+
+Fix time-of-check/time-of-action issue in subprocess.Popen.send_signal.
+
+..
+
+.. bpo: 40492
+.. date: 2020-05-04-12-16-00
+.. nonce: ONk9Na
+.. section: Library
+
+Fix ``--outfile`` for :mod:`cProfile` / :mod:`profile` not writing the
+output file in the original directory when the program being profiled
+changes the working directory.  PR by Anthony Sottile.
+
+..
+
+.. bpo: 40105
+.. date: 2020-04-03-16-13-59
+.. nonce: hfM2c0
+.. section: Library
+
+ZipFile truncates files to avoid corruption when a shorter comment is
+provided in append ("a") mode. Patch by Jan Mazur.
+
+..
+
+.. bpo: 27321
+.. date: 2020-01-19-18-40-26
+.. nonce: 8e6SpM
+.. section: Library
+
+Fixed KeyError exception when flattening an email to a string attempts to
+replace a non-existent Content-Transfer-Encoding header.
+
+..
+
+.. bpo: 42153
+.. date: 2020-11-15-13-46-31
+.. nonce: KjBhx3
+.. section: Documentation
+
+Fix the URL for the IMAP protocol documents.
+
+..
+
+.. bpo: 42061
+.. date: 2020-10-28-21-39-45
+.. nonce: _x-0sg
+.. section: Documentation
+
+Document __format__ functionality for IP addresses.
+
+..
+
+.. bpo: 42010
+.. date: 2020-10-21-02-21-14
+.. nonce: 76vJ0u
+.. section: Documentation
+
+Clarify that subscription expressions are also valid for certain
+:term:`classes <class>` and :term:`types <type>` in the standard library,
+and for user-defined classes and types if the classmethod
+:meth:`__class_getitem__` is provided.
+
+..
+
+.. bpo: 41805
+.. date: 2020-10-10-01-36-37
+.. nonce: l-CGv5
+.. section: Documentation
+
+Documented :ref:`generic alias type <types-genericalias>` and
+:data:`types.GenericAlias`. Also added an entry in glossary for
+:term:`generic types <generic type>`.
+
+..
+
+.. bpo: 41774
+.. date: 2020-09-24-15-35-13
+.. nonce: 5IqdGP
+.. section: Documentation
+
+In Programming FAQ "Sequences (Tuples/Lists)" section, add "How do you
+remove multiple items from a list".
+
+..
+
+.. bpo: 35293
+.. date: 2020-09-12-17-37-13
+.. nonce: _cOwPD
+.. section: Documentation
+
+Fix RemovedInSphinx40Warning when building the documentation. Patch by
+Dong-hee Na.
+
+..
+
+.. bpo: 41726
+.. date: 2020-09-08-16-57-09
+.. nonce: g0UXrn
+.. section: Documentation
+
+Update the refcounts info of ``PyType_FromModuleAndSpec``.
+
+..
+
+.. bpo: 39693
+.. date: 2020-02-24-09-02-05
+.. nonce: QXw0Fm
+.. section: Documentation
+
+Fix tarfile's extractfile documentation
+
+..
+
+.. bpo: 39416
+.. date: 2020-01-22-05-14-53
+.. nonce: uYjhEm
+.. section: Documentation
+
+Document some restrictions on the default string representations of numeric
+classes.
+
+..
+
+.. bpo: 40754
+.. date: 2020-11-13-21-51-34
+.. nonce: Ekoxkg
+.. section: Tests
+
+Include ``_testinternalcapi`` module in Windows installer for test suite
+
+..
+
+.. bpo: 41739
+.. date: 2020-10-12-00-11-47
+.. nonce: wSCc4K
+.. section: Tests
+
+Fix test_logging.test_race_between_set_target_and_flush(): the test now
+waits until all threads complete to avoid leaking running threads.
+
+..
+
+.. bpo: 41970
+.. date: 2020-10-08-14-00-17
+.. nonce: aZ8QFf
+.. section: Tests
+
+Avoid a test failure in ``test_lib2to3`` if the module has already imported
+at the time the test executes. Patch by Pablo Galindo.
+
+..
+
+.. bpo: 41944
+.. date: 2020-10-05-17-43-46
+.. nonce: rf1dYb
+.. section: Tests
+
+Tests for CJK codecs no longer call ``eval()`` on content received via HTTP.
+
+..
+
+.. bpo: 41939
+.. date: 2020-10-05-09-37-43
+.. nonce: P4OlbA
+.. section: Tests
+
+Fix test_site.test_license_exists_at_url(): call
+``urllib.request.urlcleanup()`` to reset the global
+``urllib.request._opener``. Patch by Victor Stinner.
+
+..
+
+.. bpo: 41561
+.. date: 2020-09-18-16-14-03
+.. nonce: uPnwrW
+.. section: Tests
+
+test_ssl: skip test_min_max_version_mismatch when TLS 1.0 is not available
+
+..
+
+.. bpo: 41602
+.. date: 2020-08-25-19-25-36
+.. nonce: Z64s0I
+.. section: Tests
+
+Add tests for SIGINT handling in the runpy module.
+
+..
+
+.. bpo: 41306
+.. date: 2020-08-03-13-44-37
+.. nonce: VDoWXI
+.. section: Tests
+
+Fixed a failure in ``test_tk.test_widgets.ScaleTest`` happening when
+executing the test with Tk 8.6.10.
+
+..
+
+.. bpo: 42398
+.. date: 2020-11-18-11-58-44
+.. nonce: Yt5wO8
+.. section: Build
+
+Fix a race condition in "make regen-all" when make -jN option is used to run
+jobs in parallel. The clinic.py script now only use atomic write to write
+files. Moveover, generated files are now left unchanged if the content does
+not change, to not change the file modification time.
+
+..
+
+.. bpo: 41617
+.. date: 2020-11-13-15-04-53
+.. nonce: 98_oaE
+.. section: Build
+
+Fix building ``pycore_bitutils.h`` internal header on old clang version
+without ``__builtin_bswap16()`` (ex: Xcode 4.6.3 on Mac OS X 10.7). Patch by
+Joshua Root and Victor Stinner.
+
+..
+
+.. bpo: 38249
+.. date: 2020-09-28-21-56-51
+.. nonce: uzMCaZ
+.. section: Build
+
+Update :c:macro:`Py_UNREACHABLE` to use __builtin_unreachable() if only the
+compiler is able to use it. Patch by Dong-hee Na.
+
+..
+
+.. bpo: 40998
+.. date: 2020-06-17-09-05-02
+.. nonce: sgqmg9
+.. section: Build
+
+Addressed three compiler warnings found by undefined behavior sanitizer
+(ubsan).
+
+..
+
+.. bpo: 42120
+.. date: 2020-11-16-22-41-02
+.. nonce: 9scgko
+.. section: Windows
+
+Remove macro definition of ``copysign`` (to ``_copysign``) in headers.
+
+..
+
+.. bpo: 38439
+.. date: 2020-10-20-13-19-42
+.. nonce: eMLi-t
+.. section: Windows
+
+Updates the icons for IDLE in the Windows Store package.
+
+..
+
+.. bpo: 41744
+.. date: 2020-09-11-17-59-33
+.. nonce: e_ugDQ
+.. section: Windows
+
+Fixes automatic import of props file when using the Nuget package.
+
+..
+
+.. bpo: 41557
+.. date: 2020-08-26-09-35-06
+.. nonce: vt00cQ
+.. section: Windows
+
+Update Windows installer to use SQLite 3.33.0.
+
+..
+
+.. bpo: 38324
+.. date: 2020-05-30-02-46-43
+.. nonce: 476M-5
+.. section: Windows
+
+Avoid Unicode errors when accessing certain locale data on Windows.
+
+..
+
+.. bpo: 41116
+.. date: 2020-11-15-16-43-45
+.. nonce: oCkbrF
+.. section: macOS
+
+Ensure distutils.unixxcompiler.find_library_file can find system provided
+libraries on macOS 11.
+
+..
+
+.. bpo: 41100
+.. date: 2020-11-01-16-40-23
+.. nonce: BApztP
+.. section: macOS
+
+Add support for macOS 11 and Apple Silicon systems.
+
+It is now possible to build "Universal 2" binaries using
+"--enable-universalsdk --with-universal-archs=universal2".
+
+Binaries build on later macOS versions can be deployed back to older
+versions (tested up to macOS 10.9), when using the correct deployment
+target. This is tested using Xcode 11 and later.
+
+..
+
+.. bpo: 38443
+.. date: 2020-10-23-10-26-53
+.. nonce: vu64tl
+.. section: macOS
+
+The ``--enable-universalsdk`` and ``--with-universal-archs`` options for the
+configure script now check that the specified architectures can be used.
+
+..
+
+.. bpo: 41471
+.. date: 2020-10-19-12-25-19
+.. nonce: gwA7un
+.. section: macOS
+
+Ignore invalid prefix lengths in system proxy excludes.
+
+..
+
+.. bpo: 41557
+.. date: 2020-08-26-09-31-37
+.. nonce: mcQ75z
+.. section: macOS
+
+Update macOS installer to use SQLite 3.33.0.
+
+..
+
+.. bpo: 42426
+.. date: 2020-11-21-17-21-21
+.. nonce: kNnPoC
+.. section: IDLE
+
+Fix reporting offset of the RE error in searchengine.
+
+..
+
+.. bpo: 42415
+.. date: 2020-11-20-01-30-27
+.. nonce: CyD-va
+.. section: IDLE
+
+Get docstrings for IDLE calltips more often by using inspect.getdoc.
+
+..
+
+.. bpo: 33987
+.. date: 2020-10-24-21-27-37
+.. nonce: fIh9JL
+.. section: IDLE
+
+Mostly finish using ttk widgets, mainly for editor, settings, and searches.
+Some patches by Mark Roseman.
+
+..
+
+.. bpo: 41775
+.. date: 2020-09-24-14-31-16
+.. nonce: sB8Vre
+.. section: IDLE
+
+Use 'IDLE Shell' as shell title
+
+..
+
+.. bpo: 35764
+.. date: 2020-09-22-11-13-45
+.. nonce: VoNa8y
+.. section: IDLE
+
+Rewrite the Calltips doc section.
+
+..
+
+.. bpo: 40181
+.. date: 2020-09-22-00-45-40
+.. nonce: hhQi3z
+.. section: IDLE
+
+In calltips, stop reminding that '/' marks the end of positional-only
+arguments.
+
+..
+
+.. bpo: 40511
+.. date: 2020-06-16-12-16-13
+.. nonce: XkihpM
+.. section: IDLE
+
+Typing opening and closing parentheses inside the parentheses of a function
+call will no longer cause unnecessary "flashing" off and on of an existing
+open call-tip, e.g. when typed in a string literal.
+
+..
+
+.. bpo: 38439
+.. date: 2020-04-22-09-37-40
+.. nonce: ieXL-c
+.. section: IDLE
+
+Add a 256×256 pixel IDLE icon to the Windows .ico file. Created by Andrew
+Clover. Remove the low-color gif variations from the .ico file.
+
+..
+
+.. bpo: 42015
+.. date: 2020-10-12-20-13-58
+.. nonce: X4H2_V
+.. section: C API
+
+Fix potential crash in deallocating method objects when dynamically
+allocated `PyMethodDef`'s lifetime is managed through the ``self`` argument
+of a `PyCFunction`.
+
+..
+
+.. bpo: 41986
+.. date: 2020-10-09-22-50-46
+.. nonce: JUPE59
+.. section: C API
+
+:c:data:`Py_FileSystemDefaultEncodeErrors` and :c:data:`Py_UTF8Mode` are
+available again in limited API.