.. bpo: 30947
.. date: 2017-08-16-16-35-59
.. nonce: iNMmm4
.. release date: 2017-08-26
.. section: Security

Upgrade libexpat embedded copy from version 2.2.1 to 2.2.3 to get security
fixes.

..

.. 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: 31135
.. date: 2017-08-08-14-59-26
.. nonce: 9q1QdB
.. section: Library

ttk: Fix LabeledScale and OptionMenu destroy() method. Call the parent
destroy() method even if the used attribute doesn't exist. The
LabeledScale.destroy() method now also explicitly clears label and scale
attributes to help the garbage collector to destroy all widgets.

..

.. bpo: 31107
.. date: 2017-08-02-12-48-15
.. nonce: 1t2hn5
.. section: Library

Fix `copy_reg._slotnames()` mangled attribute calculation for classes whose
name begins with an underscore. Patch by Shane Harvey.

..

.. bpo: 29519
.. date: 2017-07-31-19-32-57
.. nonce: _j1awg
.. section: Library

Fix weakref spewing exceptions during interpreter shutdown when used with a
rare combination of multiprocessing and custom codecs.

..

.. bpo: 30119
.. date: 2017-07-26-22-02-07
.. nonce: DZ6C_S
.. section: Library

ftplib.FTP.putline() now throws ValueError on commands that contains CR or
LF. Patch by Dong-hee Na.

..

.. bpo: 30595
.. date: 2017-07-26-04-46-12
.. nonce: -zJ7d8
.. section: Library

multiprocessing.Queue.get() with a timeout now polls its reader in
non-blocking mode if it succeeded to aquire the lock but the acquire took longer
than the timeout.

..

.. bpo: 29902
.. date: 2017-07-23-13-47-22
.. nonce: CiuFdn
.. section: Library

Py3k deprecation warning now is emitted when pickling or copying some
builtin and extension objects that don't support pickling explicitly and are
pickled incorrectly by default (like memoryview or staticmethod).  This is a
TypeError in Python 3.6.

..

.. 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: 30715
.. date: 2017-07-25-15-27-44
.. nonce: Sp7bTF
.. section: Tests

Address ALPN callback changes for OpenSSL 1.1.0f. The latest version behaves
like OpenSSL 1.0.2 and no longer aborts handshake.

..

.. 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: 30283
.. date: 2017-06-26-11-24-14
.. nonce: qCQmlm
.. 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`).