(cherry picked from commit e385d066)
Co-authored-by: Stéphane Wirtel <stephane@wirtel.be>

(cherry picked from commit d4d60134)

python-gdb.py now handles errors on computing the line number
of a Python frame.

Changes:

* PyFrameObjectPtr.current_line_num() now catchs any Exception on
  calling addr2line(), instead of failing with a surprising "<class
  'TypeError'> 'FakeRepr' object is not subscriptable" error.
* All callers of current_line_num() now handle current_line_num()
  returning None.
* PyFrameObjectPtr.current_line() now also catchs IndexError on
  getting a line from the Python source file.

(cherry picked from commit 2e438cc2)

The bytearray constructor converted unexpected exceptions
(e.g. MemoryError and KeyboardInterrupt) to TypeError.
(cherry picked from commit e890421e)

Covered all special cases: bytes, tuple, list, differend
kinds of iterables and iterators.
(cherry picked from commit 1a997eb2)

Frame's field f_tstate is NULL when the generator is exhausted.

(cherry picked from commit 4505f65a)
Co-authored-by: Gus Goulart <augusto@goulart.me>

When Python is built with the intel control-flow protection flags,
-mcet -fcf-protection, gdb is not able to read the stack without
actually jumping inside the function. This means an extra
'next' command is required to make the $pc (program counter)
enter the function and make the stack of the function exposed to gdb.

test_gdb: get_gdb_repr() now uses the "backtrace 1" command after
breakpoint, as in the master branch.
Co-Authored-By: Marcel Plch <gmarcel.plch@gmail.com>

(cherry picked from commit 9b7c74ca)
(cherry picked from commit 79d21331)

Fix a reference issue inside multiprocessing.Pool that caused the pool to remain alive if it was deleted without being closed or terminated explicitly.

* bpo-13407: Mention that tarfile doesn't support multistream bzip2 files

* Add mention to bz2 module also

Fix the following warning:

Python/pystrtod.c: In function 'format_float_short':
Python/pystrtod.c:1007:13: warning: 'strncpy' output truncated before terminating nul copying 3 bytes from a string of the same length [-Wstringop-truncation]
             strncpy(p, "ERR", 3);

(cherry picked from commit 9fb84157)

(cherry picked from commit e0e5065d)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

This makes streamed zips compatible with MacOS Archive Utility and
other applications.
(cherry picked from commit 4ba3b50b)
Co-authored-by: Silas Sewell <silas@sewell.org>

Also make docs for NEWFALSE and NEWTRUE more consistent
with docs for other opcodes.
(cherry picked from commit 488cfb78)
Co-authored-by: Krzysztof Wroblewski <krzysiek.wr@gmail.com>

https://bugs.python.org/issue34623
(cherry picked from commit 026337a7)
Co-authored-by: Christian Heimes <christian@python.org>


https://bugs.python.org/issue34623

(cherry picked from commit 8213eadd)
Co-authored-by: Berker Peksag <berker.peksag@gmail.com>

Update all test certs and keys to use future proof crypto settings:

* 3072 bit RSA keys
* SHA-256 signature

Signed-off-by: Christian Heimes <christian@python.org>.
(cherry picked from commit e6dac007)



https://bugs.python.org/issue34542

Co-authored-by: Vladimir Matveev <v2matveev@outlook.com>

(cherry picked from commit 9bdb7be4)

The C accelerated _elementtree module now initializes hash randomization
salt from _Py_HashSecret instead of libexpat's default CPRNG.
Signed-off-by: Christian Heimes <christian@python.org>

https://bugs.python.org/issue34623.
(cherry picked from commit cb5778f0)
Co-authored-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue34623

Include ``openssl/dh.h`` header file to fix implicit function declaration of ``DH_free()``.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>.
(cherry picked from commit b3a271fc)
Co-authored-by: Alexandru Ardelean <ardeleanalex@gmail.com>



https://bugs.python.org/issue34710

(cherry picked from commit 76aa2c0a9a8dd3ac90b91e7342c8ce8125bf21f9)
Co-authored-by: larryhastings <larry@hastings.org>

(cherry picked from commit 3fe33043)



https://bugs.python.org/issue19417

When the server has closed the connection before sending a status-line,
the client's error message should have a more descriptive error message

https://bugs.python.org/issue8450


https://bugs.python.org/issue8450

(cherry picked from commit a4414ef2)

It was accidentally added in 107f3cc7.

(cherry picked from commit a710ebd2)

(cherry picked from commit 40caa05f)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

Reported by Svace static analyzer.
(cherry picked from commit 6f82bffd)
Co-authored-by: Alexey Izbyshev <izbyshev@ispras.ru>

It was backported in 0cc43df0.

(cherry picked from commit b9bf9d02)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

https://bugs.python.org/issue34405

(cherry picked from commit 31912b43c903aafad09350899ed6a9dec7c43421)
Co-authored-by: Ned Deily <nad@python.org>

<!-- issue-number: [bpo-34405](https://www.bugs.python.org/issue34405) -->
https://bugs.python.org/issue34405
<!-- /issue-number -->

(cherry picked from commit 6b273f7f)
Co-authored-by: Bo Bayles <bbayles@gmail.com>

[2.7] closes bpo-31608: Fix a crash in methods of a subclass of _collections.deque with a bad __new__(). (GH-9179)

(cherry picked from commit 5033aa77)
Co-authored-by: Benjamin Peterson <benjamin@python.org>

Python 2 never checked for I/O error when reading .py files and
thus could mistake an I/O error for EOF and create incorrect .pyc
files.
This adds an check for this and aborts on an error.

Many type object initializations labeled a field "tp_size" in the
comment, but the name of that field is tp_basicsize..
(cherry picked from commit 0e0bc4e2)
Co-authored-by: Peter Eisentraut <peter@eisentraut.org>

(cherry picked from commit 4e519377)
Co-authored-by: Zackery Spytz <zspytz@gmail.com>