A fix for 69e96910, which resulted in lchmod being disabled on all platforms, not just Linux.

(cherry picked from commit ed709d56)

Set CUSTOMIZED_OSX_COMPILER to True to disable
_osx_support.customize_compiler().

Fix reference leak hunting in regrtest: compute also deltas (of
reference count and file descriptor count) during warmup, to ensure
that everything is initialized before starting to hunt reference
leaks.

Other changes:

* Replace gc.collect() with support.gc_collect() in clear_caches()
* dash_R() is now more quiet with --quiet option (don't display
  progress).
* Precompute the full range for "for it in range(repcount):" to
  ensure that the iteration doesn't allocate anything new.
* dash_R() now is responsible to call warm_caches().

(cherry picked from commit 5aaac94e)

(cherry picked from commit 487b73ab)

bpo-36150: Fix possible assertion failures due to _ctypes.c's PyCData_reduce(). (GH-12106) (GH-12643)

(cherry picked from commit 5f2c5081)

Remove the PyMem_FREE() call added in cb90c89d.  The buffer will be
freed when PyTokenizer_Free() is called on the tokenizer state.
(cherry picked from commit cda139d1)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

(cherry picked from commit d5a5a33f)
Co-authored-by: Philipp A <flying-sheep@web.de>

(cherry picked from commit f760610b)
Co-authored-by: Andre Delfino <adelfino@gmail.com>

(cherry picked from commit 6cd658b1)
Co-authored-by: Tal Einat <taleinat+github@gmail.com>


https://bugs.python.org/issue34203

(cherry picked from commit 0523c39e)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

* bpo-34085: Improve wording on classmethod/staticmethod

* Address comments from Éric

* Address comments from Éric
(cherry picked from commit 548cb606)
Co-authored-by: Andre Delfino <adelfino@gmail.com>

Add missing Py_DECREF()s.

(cherry picked from commit cb90c89d)

(cherry picked from commit fc8284e2)
Co-authored-by: Jean-François B <jfbu@free.fr>

(cherry picked from commit 9ae513ca)

(cherry picked from commit 74ae50e5)
Co-authored-by: CAM Gerlach <CAM.Gerlach@Gerlach.CAM>

Fix buffer overflow in send() and sendall() methods of socket.socket
for data larger than 2 GiB.

(cherry picked from commit dfc8fc15fa989acba3c372572e52bbcb5ab38a37)

The test test_customize_compiler() now mocks all sysconfig variables
and all environment variables used by customize_compiler().

(cherry picked from commit 72c7b372)

Fix CFLAGS in customize_compiler() of distutils.sysconfig: when the
CFLAGS environment variable is defined, don't override CFLAGS variable with
the OPT variable anymore.

Initial patch written by David Malcolm.
Co-Authored-By: David Malcolm <dmalcolm@redhat.com>
(cherry picked from commit 86082c22)

Fix an unlikely memory leak on conversion from string to float in the
function _Py_dg_strtod() used by float(str), complex(str),
pickle.load(), marshal.load(), etc.

Fix an unlikely memory leak in _Py_dg_strtod() on "undfl:" label:
rewrite memory management in this function to always release all
memory before exiting the function. Initialize variables to NULL, and
set them to NULL after calling Bfree() at the "cont:" label.

Note: Bfree(NULL) is well defined: it does nothing.

(cherry picked from commit 9776b063)

Fix a reference leak in _bufferedreader_read_all():
_io.BufferedIOMixin.read() leaks a reference on 'data'
when it reads the whole file content but flush() fails.

Fix a reference leak in json if parsing a floating point number fails.

If PyOS_string_to_double() fails in _match_number_str():
decrement numstr ref counter.

Fix reference leaks in _hotshot.LogReaderType on PyTuple_New() failure.

Patch written by David Malcolm.
Co-Authored-By: David Malcolm <dmalcolm@redhat.com>

* Update pip to 19.0.3
* Update setuptools to 40.8.0
(cherry picked from commit 01e0f439)
Co-authored-by: Pradyun Gedam <pradyunsg@gmail.com>

Cherry picked by hand from a0e911b1

(cherry picked from commit bf94cc7b)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>

Remove 's' mention as there's no argument.
(cherry picked from commit e942e7b5)
Co-authored-by: Andre Delfino <adelfino@gmail.com>

The s_get() function leaks the result variable on low memory.
Partially backport commit 19b52545
to fix it.

Fix linuxaudiodev.linux_audio_device() error handling:
close the internal file descriptor if it fails to open the device.

Use test_support.TEST_HTTP_URL (pythontest.net) instead of http://www.example.com/.

Fix off-by-one bug in cPickle that caused it to use uninitialised memory on truncated pickles read from FILE*s.