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bpo-28893: Set correct __cause__ for errors about invalid awaitables returned from __aiter__ and __anext__.
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bpo-29683: Fixes to memory allocation in _PyCode_SetExtra. Patch by Brian Coleman.
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bpo-29684: Fix minor regression of PyEval_CallObjectWithKeywords. It should raise TypeError when kwargs is not a dict. But it might cause segv when args=NULL and kwargs is not a dict.
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bpo-28598: Support __rmod__ for subclasses of str being called before str.__mod__. Patch by Martijn Pieters.
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bpo-29572: Update Windows build and OS X installers to use OpenSSL 1.0.2k.
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bpo-29607: Fix stack_effect computation for CALL_FUNCTION_EX. Patch by Matthieu Dartiailh.
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bpo-29602: Fix incorrect handling of signed zeros in complex constructor for complex subclasses and for inputs having a __complex__ method. Patch by Serhiy Storchaka.
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bpo-29347: Fixed possibly dereferencing undefined pointers when creating weakref objects.
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bpo-29438: Fixed use-after-free problem in key sharing dict.
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bpo-29319: Prevent RunMainFromImporter overwriting sys.path[0].
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bpo-29337: Fixed possible BytesWarning when compare the code objects. Warnings could be emitted at compile time.
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bpo-29327: Fixed a crash when pass the iterable keyword argument to sorted().
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bpo-29034: Fix memory leak and use-after-free in os module (path_converter).
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bpo-29159: Fix regression in bytes(x) when x.__index__() raises Exception.
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bpo-28932: Do not include <sys/random.h> if it does not exist.
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bpo-25677: Correct the positioning of the syntax error caret for indented blocks. Based on patch by Michael Layzell.
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bpo-29000: Fixed bytes formatting of octals with zero padding in alternate form.
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bpo-26919: On Android, operating system data is now always encoded/decoded to/from UTF-8, instead of the locale encoding to avoid inconsistencies with os.fsencode() and os.fsdecode() which are already using UTF-8.
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bpo-28991: functools.lru_cache() was susceptible to an obscure reentrancy bug triggerable by a monkey-patched len() function.
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bpo-28739: f-string expressions are no longer accepted as docstrings and by ast.literal_eval() even if they do not include expressions.
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bpo-28512: Fixed setting the offset attribute of SyntaxError by PyErr_SyntaxLocationEx() and PyErr_SyntaxLocationObject().
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bpo-28918: Fix the cross compilation of xxlimited when Python has been built with Py_DEBUG defined.
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bpo-28731: Optimize _PyDict_NewPresized() to create correct size dict. Improve speed of dict literal with constant keys up to 30%.
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bpo-29623: Allow use of path-like object as a single argument in ConfigParser.read(). Patch by David Ellis.
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bpo-28963: Fix out of bound iteration in asyncio.Future.remove_done_callback implemented in C.
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bpo-29704: asyncio.subprocess.SubprocessStreamProtocol no longer closes before all pipes are closed.
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bpo-29271: Fix Task.current_task and Task.all_tasks implemented in C to accept None argument as their pure Python implementation.
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bpo-29703: Fix asyncio to support instantiation of new event loops in child processes.
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bpo-29376: Fix assertion error in threading._DummyThread.is_alive().
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bpo-28624: Add a test that checks that cwd parameter of Popen() accepts PathLike objects. Patch by Sayan Chowdhury.
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bpo-28518: Start a transaction implicitly before a DML statement. Patch by Aviv Palivoda.
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bpo-29532: Altering a kwarg dictionary passed to functools.partial() no longer affects a partial object after creation.
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bpo-29110: 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.
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bpo-24932: Use proper command line parsing in _testembed
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bpo-28556: 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.
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bpo-29100: Fix datetime.fromtimestamp() regression introduced in Python 3.6.0: check minimum and maximum years.
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bpo-29519: Fix weakref spewing exceptions during interpreter shutdown when used with a rare combination of multiprocessing and custom codecs.
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bpo-29416: Prevent infinite loop in pathlib.Path.mkdir
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bpo-29444: Fixed out-of-bounds buffer access in the group() method of the match object. Based on patch by WGH.
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bpo-29335: Fix subprocess.Popen.wait() when the child process has exited to a stopped instead of terminated state (ex: when under ptrace).
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bpo-29290: Fix a regression in argparse that help messages would wrap at non-breaking spaces.
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bpo-28735: Fixed the comparison of mock.MagickMock with mock.ANY.
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bpo-29316: Restore the provisional status of typing module, add corresponding note to documentation. Patch by Ivan L.
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bpo-29219: Fixed infinite recursion in the repr of uninitialized ctypes.CDLL instances.
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bpo-29011: Fix an important omission by adding Deque to the typing module.
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bpo-28969: 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.
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bpo-29142: 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.
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bpo-28961: Fix unittest.mock._Call helper: don’t ignore the name parameter anymore. Patch written by Jiajun Huang.
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bpo-29203: functools.lru_cache() now respects PEP 468 and preserves the order of keyword arguments. f(a=1, b=2) is now cached separately from f(b=2, a=1) since both calls could potentially give different results.
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bpo-15812: inspect.getframeinfo() now correctly shows the first line of a context. Patch by Sam Breese.
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bpo-29094: Offsets in a ZIP file created with extern file object and modes “w” and “x” now are relative to the start of the file.
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bpo-29085: Allow random.Random.seed() to use high quality OS randomness rather than the pid and time.
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bpo-29061: Fixed bug in secrets.randbelow() which would hang when given a negative input. Patch by Brendan Donegan.
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bpo-29079: Prevent infinite loop in pathlib.resolve() on Windows
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bpo-13051: Fixed recursion errors in large or resized curses.textpad.Textbox. Based on patch by Tycho Andersen.
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bpo-29119: Fix weakrefs in the pure python version of collections.OrderedDict move_to_end() method. Contributed by Andra Bogildea.
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bpo-9770: curses.ascii predicates now work correctly with negative integers.
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bpo-28427: old keys should not remove new values from WeakValueDictionary when collecting from another thread.
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Issue 28923: Remove editor artifacts from Tix.py.
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bpo-29055: Neaten-up empty population error on random.choice() by suppressing the upstream exception.
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bpo-28871: Fixed a crash when deallocate deep ElementTree.
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bpo-19542: Fix bugs in WeakValueDictionary.setdefault() and WeakValueDictionary.pop() when a GC collection happens in another thread.
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bpo-20191: Fixed a crash in resource.prlimit() when passing a sequence that doesn’t own its elements as limits.
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bpo-28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks.
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bpo-28847: dbm.dumb now supports reading read-only files and no longer writes the index file when it is not changed.
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bpo-26937: The chown() method of the tarfile.TarFile class does not fail now when the grp module cannot be imported, as for example on Android platforms.
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bpo-27593: sys.version and the platform module python_build(), python_branch(), and python_revision() functions now use git information rather than hg when building from a repo.
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bpo-29572: Update Windows build and OS X installers to use OpenSSL 1.0.2k.
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bpo-26851: Set Android compilation and link flags.
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bpo-28768: Fix implicit declaration of function _setmode. Patch by Masayuki Yamamoto
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bpo-29080: Removes hard dependency on hg.exe from PCBuild/build.bat
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bpo-23903: Added missed names to PC/python3.def.
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bpo-28762: lockf() is available on Android API level 24, but the F_LOCK macro is not defined in android-ndk-r13.
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bpo-28538: Fix the compilation error that occurs because if_nameindex() is available on Android API level 24, but the if_nameindex structure is not defined.
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bpo-20211: Do not add the directory for installing C header files and the directory for installing object code libraries to the cross compilation search paths. Original patch by Thomas Petazzoni.
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bpo-28849: Do not define sys.implementation._multiarch on Android.
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