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+.. bpo: 30730
+.. date: 084
+.. nonce: rJsyTH
+.. original section: Library
+.. release date: 2017-07-23
+.. section: Security
+
+Prevent environment variables injection in subprocess on Windows. Prevent
+passing other environment variables and command arguments.
+
+..
+
+.. bpo: 30694
+.. date: 083
+.. nonce: WkMWM_
+.. original section: Library
+.. section: Security
+
+Upgrade expat copy from 2.2.0 to 2.2.1 to get fixes of multiple security
+vulnerabilities including: CVE-2017-9233 (External entity infinite loop
+DoS), CVE-2016-9063 (Integer overflow, re-fix), CVE-2016-0718 (Fix
+regression bugs from 2.2.0's fix to CVE-2016-0718) and CVE-2012-0876
+(Counter hash flooding with SipHash). Note: the CVE-2016-5300 (Use os-
+specific entropy sources like getrandom) doesn't impact Python, since Python
+already gets entropy from the OS to set the expat secret using
+``XML_SetHashSalt()``.
+
+..
+
+.. bpo: 30500
+.. date: 081
+.. nonce: 1VG7R-
+.. original section: Library
+.. section: Security
+
+Fix urllib.parse.splithost() to correctly parse fragments. For example,
+``splithost('//127.0.0.1#@evil.com/')`` now correctly returns the
+``127.0.0.1`` host, instead of treating ``@evil.com`` as the host in an
+authentification (``login@host``).
+
+..
+
+.. bpo: 29591
+.. date: 076
+.. nonce: ExKblw
+.. original section: Library
+.. section: Security
+
+Update expat copy from 2.1.1 to 2.2.0 to get fixes of CVE-2016-0718 and
+CVE-2016-4472. See https://sourceforge.net/p/expat/bugs/537/ for more
+information.
+
+..
+
+.. bpo: 30876
+.. date: 2017-07-11-06-31-32
+.. nonce: x35jZX
+.. section: Core and Builtins
+
+Relative import from unloaded package now reimports the package instead of
+failing with SystemError. Relative import from non-package now fails with
+ImportError rather than SystemError.
+
+..
+
+.. bpo: 30765
+.. date: 2017-06-26-14-29-50
+.. nonce: Q5iBmf
+.. section: Core and Builtins
+
+Avoid blocking in pthread_mutex_lock() when PyThread_acquire_lock() is asked
+not to block.
+
+..
+
+.. bpo: 27945
+.. date: 100
+.. nonce: p29r3O
+.. section: Core and Builtins
+
+Fixed various segfaults with dict when input collections are mutated during
+searching, inserting or comparing. Based on patches by Duane Griffin and
+Tim Mitchell.
+
+..
+
+.. bpo: 25794
+.. date: 099
+.. nonce: xfPwqm
+.. section: Core and Builtins
+
+Fixed type.__setattr__() and type.__delattr__() for non-interned attribute
+names. Based on patch by Eryk Sun.
+
+..
+
+.. bpo: 29935
+.. date: 098
+.. nonce: vgjdJo
+.. section: Core and Builtins
+
+Fixed error messages in the index() method of tuple, list and deque when
+pass indices of wrong type.
+
+..
+
+.. bpo: 28876
+.. date: 097
+.. nonce: cU-sGT
+.. section: Core and Builtins
+
+``bool(range)`` works even if ``len(range)`` raises :exc:`OverflowError`.
+
+..
+
+.. bpo: 29600
+.. date: 096
+.. nonce: 77wQ6C
+.. section: Core and Builtins
+
+Fix wrapping coroutine return values in StopIteration.
+
+..
+
+.. bpo: 29537
+.. date: 095
+.. nonce: lu1ysY
+.. section: Core and Builtins
+
+Restore runtime compatibility with bytecode files generated by CPython 3.5.0
+to 3.5.2, and adjust the eval loop to avoid the problems that could be
+caused by the malformed variant of the BUILD_MAP_UNPACK_WITH_CALL opcode
+that they may contain. Patch by Petr Viktorin, Serhiy Storchaka, and Nick
+Coghlan.
+
+..
+
+.. bpo: 28598
+.. date: 094
+.. nonce: QxbzQn
+.. section: Core and Builtins
+
+Support __rmod__ for subclasses of str being called before str.__mod__.
+Patch by Martijn Pieters.
+
+..
+
+.. bpo: 29602
+.. date: 093
+.. nonce: qyyskC
+.. section: Core and Builtins
+
+Fix incorrect handling of signed zeros in complex constructor for complex
+subclasses and for inputs having a __complex__ method. Patch by Serhiy
+Storchaka.
+
+..
+
+.. bpo: 29347
+.. date: 092
+.. nonce: 1RPPGN
+.. section: Core and Builtins
+
+Fixed possibly dereferencing undefined pointers when creating weakref
+objects.
+
+..
+
+.. bpo: 29438
+.. date: 091
+.. nonce: IKxD6I
+.. section: Core and Builtins
+
+Fixed use-after-free problem in key sharing dict.
+
+..
+
+.. bpo: 29319
+.. date: 090
+.. nonce: KLDUZf
+.. section: Core and Builtins
+
+Prevent RunMainFromImporter overwriting sys.path[0].
+
+..
+
+.. bpo: 29337
+.. date: 089
+.. nonce: bjX8AE
+.. section: Core and Builtins
+
+Fixed possible BytesWarning when compare the code objects. Warnings could be
+emitted at compile time.
+
+..
+
+.. bpo: 29478
+.. date: 088
+.. nonce: rTQ-qy
+.. section: Core and Builtins
+
+If max_line_length=None is specified while using the Compat32 policy, it is
+no longer ignored. Patch by Mircea Cosbuc.
+
+..
+
+.. bpo: 29403
+.. date: 2017-07-20-02-29-49
+.. nonce: 3RinCV
+.. section: Library
+
+Fix ``unittest.mock``'s autospec to not fail on method-bound builtin
+functions. Patch by Aaron Gallagher.
+
+..
+
+.. bpo: 30961
+.. date: 2017-07-18-23-47-51
+.. nonce: 064jz0
+.. section: Library
+
+Fix decrementing a borrowed reference in tracemalloc.
+
+..
+
+.. bpo: 30886
+.. date: 2017-07-10-12-14-22
+.. nonce: nqQj34
+.. section: Library
+
+Fix multiprocessing.Queue.join_thread(): it now waits until the thread
+completes, even if the thread was started by the same process which created
+the queue.
+
+..
+
+.. bpo: 29854
+.. date: 2017-07-07-02-18-57
+.. nonce: J8wKb_
+.. section: Library
+
+Fix segfault in readline when using readline's history-size option. Patch
+by Nir Soffer.
+
+..
+
+.. bpo: 30807
+.. date: 2017-06-29-22-04-44
+.. nonce: sLtjY-
+.. section: Library
+
+signal.setitimer() may disable the timer when passed a tiny value.
+
+Tiny values (such as 1e-6) are valid non-zero values for setitimer(), which
+is specified as taking microsecond-resolution intervals. However, on some
+platform, our conversion routine could convert 1e-6 into a zero interval,
+therefore disabling the timer instead of (re-)scheduling it.
+
+..
+
+.. bpo: 30441
+.. date: 2017-06-29-14-25-14
+.. nonce: 3Wh9kc
+.. section: Library
+
+Fix bug when modifying os.environ while iterating over it
+
+..
+
+.. bpo: 30532
+.. date: 2017-06-26-11-01-59
+.. nonce: qTeL1o
+.. section: Library
+
+Fix email header value parser dropping folding white space in certain cases.
+
+..
+
+.. bpo: 29169
+.. date: 087
+.. nonce: 8ypApm
+.. section: Library
+
+Update zlib to 1.2.11.
+
+..
+
+.. bpo: 30879
+.. date: 086
+.. nonce: N3KI-o
+.. section: Library
+
+os.listdir() and os.scandir() now emit bytes names when called with bytes-
+like argument.
+
+..
+
+.. bpo: 30746
+.. date: 085
+.. nonce: 7drQI0
+.. section: Library
+
+Prohibited the '=' character in environment variable names in
+``os.putenv()`` and ``os.spawn*()``.
+
+..
+
+.. bpo: 29755
+.. date: 082
+.. nonce: diQcY_
+.. section: Library
+
+Fixed the lgettext() family of functions in the gettext module. They now
+always return bytes.
+
+..
+
+.. bpo: 30645
+.. date: 080
+.. nonce: oYzbbW
+.. section: Library
+
+Fix path calculation in imp.load_package(), fixing it for cases when a
+package is only shipped with bytecodes. Patch by Alexandru Ardelean.
+
+..
+
+.. bpo: 23890
+.. date: 079
+.. nonce: GCFAAZ
+.. section: Library
+
+unittest.TestCase.assertRaises() now manually breaks a reference cycle to
+not keep objects alive longer than expected.
+
+..
+
+.. bpo: 30149
+.. date: 078
+.. nonce: hE649r
+.. section: Library
+
+inspect.signature() now supports callables with variable-argument parameters
+wrapped with partialmethod. Patch by Dong-hee Na.
+
+..
+
+.. bpo: 29931
+.. date: 077
+.. nonce: tfcTwK
+.. section: Library
+
+Fixed comparison check for ipaddress.ip_interface objects. Patch by Sanjay
+Sundaresan.
+
+..
+
+.. bpo: 24484
+.. date: 075
+.. nonce: vFem8K
+.. section: Library
+
+Avoid race condition in multiprocessing cleanup.
+
+..
+
+.. bpo: 28994
+.. date: 074
+.. nonce: 9vzun1
+.. section: Library
+
+The traceback no longer displayed for SystemExit raised in a callback
+registered by atexit.
+
+..
+
+.. bpo: 30508
+.. date: 073
+.. nonce: wNWRS2
+.. section: Library
+
+Don't log exceptions if Task/Future "cancel()" method was called.
+
+..
+
+.. bpo: 28556
+.. date: 072
+.. nonce: mESP7G
+.. section: Library
+
+Updates to typing module: Add generic AsyncContextManager, add support for
+ContextManager on all versions. Original PRs by Jelle Zijlstra and Ivan
+Levkivskyi
+
+..
+
+.. bpo: 29870
+.. date: 071
+.. nonce: p960Ih
+.. section: Library
+
+Fix ssl sockets leaks when connection is aborted in asyncio/ssl
+implementation. Patch by Michaël Sghaïer.
+
+..
+
+.. bpo: 29743
+.. date: 070
+.. nonce: en2P4s
+.. section: Library
+
+Closing transport during handshake process leaks open socket. Patch by
+Nikolay Kim
+
+..
+
+.. bpo: 27585
+.. date: 069
+.. nonce: 0Ugqqu
+.. section: Library
+
+Fix waiter cancellation in asyncio.Lock. Patch by Mathieu Sornay.
+
+..
+
+.. bpo: 30418
+.. date: 068
+.. nonce: EwISQm
+.. section: Library
+
+On Windows, subprocess.Popen.communicate() now also ignore EINVAL on
+stdin.write() if the child process is still running but closed the pipe.
+
+..
+
+.. bpo: 30378
+.. date: 067
+.. nonce: R_19_5
+.. section: Library
+
+Fix the problem that logging.handlers.SysLogHandler cannot handle IPv6
+addresses.
+
+..
+
+.. bpo: 29960
+.. date: 066
+.. nonce: g0wr3r
+.. section: Library
+
+Preserve generator state when _random.Random.setstate() raises an exception.
+Patch by Bryan Olson.
+
+..
+
+.. bpo: 30414
+.. date: 065
+.. nonce: jGl1Lb
+.. section: Library
+
+multiprocessing.Queue._feed background running thread do not break from main
+loop on exception.
+
+..
+
+.. bpo: 30003
+.. date: 064
+.. nonce: BOl9HE
+.. section: Library
+
+Fix handling escape characters in HZ codec. Based on patch by Ma Lin.
+
+..
+
+.. bpo: 30301
+.. date: 063
+.. nonce: ywOkjN
+.. section: Library
+
+Fix AttributeError when using SimpleQueue.empty() under *spawn* and
+*forkserver* start methods.
+
+..
+
+.. bpo: 30329
+.. date: 062
+.. nonce: EuT36N
+.. section: Library
+
+imaplib and poplib now catch the Windows socket WSAEINVAL error (code 10022)
+on shutdown(SHUT_RDWR): An invalid operation was attempted. This error
+occurs sometimes on SSL connections.
+
+..
+
+.. bpo: 30375
+.. date: 061
+.. nonce: 9c8qM7
+.. section: Library
+
+Warnings emitted when compile a regular expression now always point to the
+line in the user code. Previously they could point into inners of the re
+module if emitted from inside of groups or conditionals.
+
+..
+
+.. bpo: 30048
+.. date: 060
+.. nonce: ELRx8R
+.. section: Library
+
+Fixed ``Task.cancel()`` can be ignored when the task is running coroutine
+and the coroutine returned without any more ``await``.
+
+..
+
+.. bpo: 29990
+.. date: 059
+.. nonce: HWV6KE
+.. section: Library
+
+Fix range checking in GB18030 decoder. Original patch by Ma Lin.
+
+..
+
+.. bpo: 26293
+.. date: 058
+.. nonce: wig0YG
+.. section: Library
+
+Change resulted because of zipfile breakage. (See also: bpo-29094)
+
+..
+
+.. bpo: 30243
+.. date: 057
+.. nonce: RHQt0v
+.. section: Library
+
+Removed the __init__ methods of _json's scanner and encoder. Misusing them
+could cause memory leaks or crashes. Now scanner and encoder objects are
+completely initialized in the __new__ methods.
+
+..
+
+.. bpo: 30185
+.. date: 056
+.. nonce: Tiu1n8
+.. section: Library
+
+Avoid KeyboardInterrupt tracebacks in forkserver helper process when Ctrl-C
+is received.
+
+..
+
+.. bpo: 28556
+.. date: 055
+.. nonce: 51gjbP
+.. section: Library
+
+Various updates to typing module: add typing.NoReturn type, use
+WrapperDescriptorType, minor bug-fixes. Original PRs by Jim Fasarakis-
+Hilliard and Ivan Levkivskyi.
+
+..
+
+.. bpo: 30205
+.. date: 054
+.. nonce: BsxO34
+.. section: Library
+
+Fix getsockname() for unbound AF_UNIX sockets on Linux.
+
+..
+
+.. bpo: 30070
+.. date: 053
+.. nonce: XM_B41
+.. section: Library
+
+Fixed leaks and crashes in errors handling in the parser module.
+
+..
+
+.. bpo: 30061
+.. date: 052
+.. nonce: 2w_dX9
+.. section: Library
+
+Fixed crashes in IOBase methods __next__() and readlines() when readline()
+or __next__() respectively return non-sizeable object. Fixed possible other
+errors caused by not checking results of PyObject_Size(), PySequence_Size(),
+or PyMapping_Size().
+
+..
+
+.. bpo: 30068
+.. date: 051
+.. nonce: n4q47r
+.. section: Library
+
+_io._IOBase.readlines will check if it's closed first when hint is present.
+
+..
+
+.. bpo: 29694
+.. date: 050
+.. nonce: LWKxb1
+.. section: Library
+
+Fixed race condition in pathlib mkdir with flags parents=True. Patch by
+Armin Rigo.
+
+..
+
+.. bpo: 29692
+.. date: 049
+.. nonce: oyWrAE
+.. section: Library
+
+Fixed arbitrary unchaining of RuntimeError exceptions in
+contextlib.contextmanager. Patch by Siddharth Velankar.
+
+..
+
+.. bpo: 29998
+.. date: 048
+.. nonce: poeIKD
+.. section: Library
+
+Pickling and copying ImportError now preserves name and path attributes.
+
+..
+
+.. bpo: 29942
+.. date: 047
+.. nonce: CsGNuT
+.. section: Library
+
+Fix a crash in itertools.chain.from_iterable when encountering long runs of
+empty iterables.
+
+..
+
+.. bpo: 27863
+.. date: 046
+.. nonce: pPYHHI
+.. section: Library
+
+Fixed multiple crashes in ElementTree caused by race conditions and wrong
+types.
+
+..
+
+.. bpo: 28699
+.. date: 045
+.. nonce: wZztZP
+.. section: Library
+
+Fixed a bug in pools in multiprocessing.pool that raising an exception at
+the very first of an iterable may swallow the exception or make the program
+hang. Patch by Davin Potts and Xiang Zhang.
+
+..
+
+.. bpo: 25803
+.. date: 044
+.. nonce: CPDR0W
+.. section: Library
+
+Avoid incorrect errors raised by Path.mkdir(exist_ok=True) when the OS gives
+priority to errors such as EACCES over EEXIST.
+
+..
+
+.. bpo: 29861
+.. date: 043
+.. nonce: t2ZoRK
+.. section: Library
+
+Release references to tasks, their arguments and their results as soon as
+they are finished in multiprocessing.Pool.
+
+..
+
+.. bpo: 29884
+.. date: 042
+.. nonce: kWXR8W
+.. section: Library
+
+faulthandler: Restore the old sigaltstack during teardown. Patch by
+Christophe Zeitouny.
+
+..
+
+.. bpo: 25455
+.. date: 041
+.. nonce: ZsahHN
+.. section: Library
+
+Fixed crashes in repr of recursive buffered file-like objects.
+
+..
+
+.. bpo: 29800
+.. date: 040
+.. nonce: d2xASa
+.. section: Library
+
+Fix crashes in partial.__repr__ if the keys of partial.keywords are not
+strings. Patch by Michael Seifert.
+
+..
+
+.. bpo: 29742
+.. date: 039
+.. nonce: 8hqfEO
+.. section: Library
+
+get_extra_info() raises exception if get called on closed ssl transport.
+Patch by Nikolay Kim.
+
+..
+
+.. bpo: 8256
+.. date: 038
+.. nonce: jAwGQH
+.. section: Library
+
+Fixed possible failing or crashing input() if attributes "encoding" or
+"errors" of sys.stdin or sys.stdout are not set or are not strings.
+
+..
+
+.. bpo: 28298
+.. date: 037
+.. nonce: xfm84U
+.. section: Library
+
+Fix a bug that prevented array 'Q', 'L' and 'I' from accepting big intables
+(objects that have __int__) as elements. Patch by Oren Milman.
+
+..
+
+.. bpo: 29615
+.. date: 036
+.. nonce: OpFKzg
+.. section: Library
+
+SimpleXMLRPCDispatcher no longer chains KeyError (or any other exception) to
+exception(s) raised in the dispatched methods. Patch by Petr Motejlek.
+
+..
+
+.. bpo: 29704
+.. date: 035
+.. nonce: WHbx27
+.. section: Library
+
+asyncio.subprocess.SubprocessStreamProtocol no longer closes before all
+pipes are closed.
+
+..
+
+.. bpo: 29703
+.. date: 034
+.. nonce: ZdsPCR
+.. section: Library
+
+Fix asyncio to support instantiation of new event loops in child processes.
+
+..
+
+.. bpo: 29376
+.. date: 033
+.. nonce: rrJhJy
+.. section: Library
+
+Fix assertion error in threading._DummyThread.is_alive().
+
+..
+
+.. bpo: 29110
+.. date: 032
+.. nonce: wmE-_T
+.. section: Library
+
+Fix file object leak in aifc.open() when file is given as a filesystem path
+and is not in valid AIFF format. Patch by Anthony Zhang.
+
+..
+
+.. bpo: 28961
+.. date: 031
+.. nonce: Rt93vg
+.. section: Library
+
+Fix unittest.mock._Call helper: don't ignore the name parameter anymore.
+Patch written by Jiajun Huang.
+
+..
+
+.. bpo: 29532
+.. date: 030
+.. nonce: YCwVQn
+.. section: Library
+
+Altering a kwarg dictionary passed to functools.partial() no longer affects
+a partial object after creation.
+
+..
+
+.. bpo: 28556
+.. date: 029
+.. nonce: p6967e
+.. section: Library
+
+Various updates to typing module: typing.Counter, typing.ChainMap, improved
+ABC caching, etc. Original PRs by Jelle Zijlstra, Ivan Levkivskyi, Manuel
+Krebber, and Łukasz Langa.
+
+..
+
+.. bpo: 29100
+.. date: 028
+.. nonce: LAAERS
+.. section: Library
+
+Fix datetime.fromtimestamp() regression introduced in Python 3.6.0: check
+minimum and maximum years.
+
+..
+
+.. bpo: 29519
+.. date: 027
+.. nonce: oGGgZ4
+.. section: Library
+
+Fix weakref spewing exceptions during interpreter shutdown when used with a
+rare combination of multiprocessing and custom codecs.
+
+..
+
+.. bpo: 29416
+.. date: 026
+.. nonce: KJGyI_
+.. section: Library
+
+Prevent infinite loop in pathlib.Path.mkdir
+
+..
+
+.. bpo: 29444
+.. date: 025
+.. nonce: cEwgmk
+.. section: Library
+
+Fixed out-of-bounds buffer access in the group() method of the match object.
+Based on patch by WGH.
+
+..
+
+.. bpo: 29335
+.. date: 024
+.. nonce: _KC7IK
+.. section: Library
+
+Fix subprocess.Popen.wait() when the child process has exited to a stopped
+instead of terminated state (ex: when under ptrace).
+
+..
+
+.. bpo: 29290
+.. date: 023
+.. nonce: XBqptF
+.. section: Library
+
+Fix a regression in argparse that help messages would wrap at non-breaking
+spaces.
+
+..
+
+.. bpo: 28735
+.. date: 022
+.. nonce: admHLO
+.. section: Library
+
+Fixed the comparison of mock.MagickMock with mock.ANY.
+
+..
+
+.. bpo: 29011
+.. date: 021
+.. nonce: MI5f2R
+.. section: Library
+
+Fix an important omission by adding Deque to the typing module.
+
+..
+
+.. bpo: 29219
+.. date: 020
+.. nonce: kxui7t
+.. section: Library
+
+Fixed infinite recursion in the repr of uninitialized ctypes.CDLL instances.
+
+..
+
+.. bpo: 28969
+.. date: 019
+.. nonce: j3HJYO
+.. section: Library
+
+Fixed race condition in C implementation of functools.lru_cache. KeyError
+could be raised when cached function with full cache was simultaneously
+called from differen threads with the same uncached arguments.
+
+..
+
+.. bpo: 29142
+.. date: 018
+.. nonce: xo6kAv
+.. section: Library
+
+In urllib.request, suffixes in no_proxy environment variable with leading
+dots could match related hostnames again (e.g. .b.c matches a.b.c). Patch by
+Milan Oberkirch.
+
+..
+
+.. bpo: 30176
+.. date: 013
+.. nonce: VivmCg
+.. section: Documentation
+
+Add missing attribute related constants in curses documentation.
+
+..
+
+.. bpo: 26985
+.. date: 012
+.. nonce: NB5_9S
+.. section: Documentation
+
+Add missing info of code object in inspect documentation.
+
+..
+
+.. bpo: 28929
+.. date: 011
+.. nonce: Md7kb0
+.. section: Documentation
+
+Link the documentation to its source file on GitHub.
+
+..
+
+.. bpo: 25008
+.. date: 010
+.. nonce: CeIzyU
+.. section: Documentation
+
+Document smtpd.py as effectively deprecated and add a pointer to aiosmtpd, a
+third-party asyncio-based replacement.
+
+..
+
+.. bpo: 26355
+.. date: 009
+.. nonce: SDq_8Y
+.. section: Documentation
+
+Add canonical header link on each page to corresponding major version of the
+documentation. Patch by Matthias Bussonnier.
+
+..
+
+.. bpo: 29349
+.. date: 008
+.. nonce: PjSo-t
+.. section: Documentation
+
+Fix Python 2 syntax in code for building the documentation.
+
+..
+
+.. bpo: 30822
+.. date: 2017-07-20-14-29-54
+.. nonce: X0wREo
+.. section: Tests
+
+Fix regrtest command line parser to allow passing -u extralargefile to run
+test_zipfile64.
+
+..
+
+.. bpo: 30383
+.. date: 2017-06-27-13-52-43
+.. nonce: rCmrv7
+.. section: Tests
+
+regrtest: Enhance regrtest and backport features from the master branch.
+
+Add options: --coverage, --testdir, --list-tests (list test files, don't run
+them), --list-cases (list test identifiers, don't run them, :issue:`30523`),
+--matchfile (load a list of test filters from a text file, :issue:`30540`),
+--slowest (alias to --slow).
+
+Enhance output: add timestamp, test result, currently running tests, "Tests
+result: xxx" summary with total duration, etc.
+
+Fix reference leak hunting in regrtest, --huntrleaks: regrtest now warms up
+caches, create explicitly all internal singletons which are created on
+demand to prevent false positives when checking for reference leaks.
+(:issue:`30675`).
+
+..
+
+.. bpo: 30357
+.. date: 004
+.. nonce: n4CPEa
+.. section: Tests
+
+test_thread: setUp() now uses support.threading_setup() and
+support.threading_cleanup() to wait until threads complete to avoid random
+side effects on following tests. Initial patch written by Grzegorz Grzywacz.
+
+..
+
+.. bpo: 28087
+.. date: 003
+.. nonce: m8dc4R
+.. section: Tests
+
+Skip test_asyncore and test_eintr poll failures on macOS. Skip some tests of
+select.poll when running on macOS due to unresolved issues with the
+underlying system poll function on some macOS versions.
+
+..
+
+.. bpo: 30197
+.. date: 002
+.. nonce: c5wRfu
+.. section: Tests
+
+Enhanced functions swap_attr() and swap_item() in the test.support module.
+They now work when delete replaced attribute or item inside the with
+statement. The old value of the attribute or item (or None if it doesn't
+exist) now will be assigned to the target of the "as" clause, if there is
+one.
+
+..
+
+.. bpo: 29571
+.. date: 001
+.. nonce: r6Dixr
+.. section: Tests
+
+to match the behaviour of the ``re.LOCALE`` flag, test_re.test_locale_flag
+now uses ``locale.getpreferredencoding(False)`` to determine the candidate
+encoding for the test regex (allowing it to correctly skip the test when the
+default locale encoding is a multi-byte encoding)
+
+..
+
+.. bpo: 29243
+.. date: 007
+.. nonce: WDK4hT
+.. section: Build
+
+Prevent unnecessary rebuilding of Python during ``make test``, ``make
+install`` and some other make targets when configured with ``--enable-
+optimizations``.
+
+..
+
+.. bpo: 23404
+.. date: 006
+.. nonce: PdYVWg
+.. section: Build
+
+Don't regenerate generated files based on file modification time anymore:
+the action is now explicit. Replace ``make touch`` with ``make regen-all``.
+
+..
+
+.. bpo: 29643
+.. date: 005
+.. nonce: 4WLIJQ
+.. section: Build
+
+Fix ``--enable-optimization`` didn't work.
+
+..
+
+.. bpo: 30687
+.. date: 017
+.. nonce: 8mqHnu
+.. section: Windows
+
+Locate msbuild.exe on Windows when building rather than vcvarsall.bat
+
+..
+
+.. bpo: 29392
+.. date: 016
+.. nonce: OtqS5t
+.. section: Windows
+
+Prevent crash when passing invalid arguments into msvcrt module.
+
+..
+
+.. bpo: 27867
+.. date: 015
+.. nonce: VMCoJU
+.. section: C API
+
+Function PySlice_GetIndicesEx() is replaced with a macro if Py_LIMITED_API
+is set to the value between 0x03050400 and 0x03060000 (not including) or
+0x03060100 or higher.
+
+..
+
+.. bpo: 29083
+.. date: 014
+.. nonce: tGTjr_
+.. section: C API
+
+Fixed the declaration of some public API functions. PyArg_VaParse() and
+PyArg_VaParseTupleAndKeywords() were not available in limited API.
+PyArg_ValidateKeywordArguments(), PyArg_UnpackTuple() and Py_BuildValue()
+were not available in limited API of version < 3.3 when PY_SSIZE_T_CLEAN is
+defined.