Core and Builtins
-----------------
-- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
- least one place so as to avoid regressions.
-
-- Issue #19014: memoryview.cast() is now allowed on zero-length views.
+ - Issue #19279: UTF-7 decoder no more produces illegal strings.
+
+- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
+ C files to generate argument parsing code. (See PEP 436.)
-- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
- absurdly high.
+- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
+ the code is optimistic that if something exists in a directory named exactly
+ like the possible package being searched for that it's in actuality a
+ directory.
-- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
+- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
+ importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
+ to modules imported from cwd to now possess an absolute file path for
+ __file__ (this does not affect modules specified by path on the CLI but it
+ does affect -m/runpy). It also allows FileFinder to be more consistent by not
+ having an edge case.
-- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
+- Issue #4555: All exported C symbols are now prefixed with either
+ "Py" or "_Py".
-- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
- fails.
+- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
+ (5% to 10%) smaller.
-- Issue #16741: Fix an error reporting in int().
+- Issue #19221: Upgrade Unicode database to version 6.3.0.
-- Issue #17899: Fix rare file descriptor leak in os.listdir().
+- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
+ now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
+ if an error occurred), instead of a string allocated by PyMem_Malloc() or
+ PyMem_Realloc().
-- Issue #18552: Check return value of PyArena_AddPyObject() in
- obj2ast_object().
+- Issue #19199: Remove ``PyThreadState.tick_counter`` field
-- Issue #18560: Fix potential NULL pointer dereference in sum().
+- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
+ least one place so as to avoid regressions.
-- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
- prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
+- Issue #19087: Improve bytearray allocation in order to allow cheap popping
+ of data at the front (slice deletion).
-- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
+- Issue #19014: memoryview.cast() is now allowed on zero-length views.
-- Issue #17872: Fix a segfault in marshal.load() when input stream returns
- more bytes than requested.
+- Issue #18690: memoryview is now automatically registered with
+ collections.abc.Sequence
-- Issue #18426: Fix NULL pointer dereference in C extension import when
- PyModule_GetDef() returns an error.
+- Issue #19078: memoryview now correctly supports the reversed builtin
+ (Patch by Claudiu Popa)
-- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
- tstate is first removed from TLS and then deallocated.
+Library
+-------
-- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
- OverflowError when an argument of %c format is out of range.
+- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac.
-- Issue #18137: Detect integer overflow on precision in float.__format__()
- and complex.__format__().
+- Issues #19201, #19222, #19223: Add "x" mode (exclusive creation) in opening
+ file to bz2, gzip and lzma modules. Patches by Tim Heaney and Vajrasky Kok.
-- Issue #18183: Fix various unicode operations on strings with large unicode
- codepoints.
+- Fix a reference count leak in _sre.
-- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
+- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip,
+ a.k.a. PEP 3156). There are no docs yet, and the PEP is slightly
+ out of date with the code. This module will have *provisional* status
+ in Python 3.4.
-- Issue #18038: SyntaxError raised during compilation sources with illegal
- encoding now always contains an encoding name.
+- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
-- Issue #17644: Fix a crash in str.format when curly braces are used in square
- brackets.
+- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
+ to ``contextlib.suppress`` in order to be more consistent with existing
+ descriptions of that operation elsewhere in the language and standard
+ library documentation (Patch by Zero Piraeus).
-- Issue #17983: Raise a SyntaxError for a ``global __class__`` statement in a
- class body.
+- Issue #18891: Completed the new email package (provisional) API additions
+ by adding new classes EmailMessage, MIMEPart, and ContentManager.
-- Issue #17927: Frame objects kept arguments alive if they had been copied into
- a cell, even if the cell was cleared.
+- Issue #18281: Unused stat constants removed from `tarfile`.
-Library
--------
+- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
+ and groups() methods of match object now always return a string or a bytes
+ object.
-- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
+- Issue #18725: The textwrap module now supports truncating multiline text.
- Issue #18776: atexit callbacks now display their full traceback when they
raise an exception.
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