Issue #26249: PyMem_Malloc() allocator family now uses the pymalloc allocator
rather than system malloc(). Applications calling PyMem_Malloc() without
holding the GIL can now crash: use PYTHONMALLOC=debug environment variable to
validate the usage of memory allocators in your application.

The function was only called in _sizeof_void_p()

Issue #26799: Fix python-gdb.py: don't get once C types when the Python code
is loaded, but get C types on demande. The C types can change if
python-gdb.py is loaded before the Python executable.

Patch written by Thomas Ilsche.

Sorry, it was hard to retrieve the original author of the patch in this issue
with a long history and many authors.

Issue #26802: Optimize function calls only using unpacking like "func(*tuple)"
(no other positional argument, no keyword): avoid copying the tuple.

Patch written by Joe Jevnik.

Patch by Joe Jevnik.

Issue #26801: Fix error handling in shutil.get_terminal_size(), catch
AttributeError instead of NameError. Patch written by Emanuel Barry.

test_shutil: skip the functional test using "stty size" command if
os.get_terminal_size() is missing.

Issue #26805.

Issue #26805.

Sync with upstream, see github.com/python/typing/pull/205

Isse #26516.

Issue #21668: Link audioop, _datetime, _ctypes_test modules to libm, except on
Mac OS X. Patch written by Xavier de Gaye.

link field limits for multibyte character encodings like utf-8.

Patch by Xiang Zhang.

Patch by Xiang Zhang.

typing.py: Consider ellipsis in TupleMeta.__eq__. By Kalle Tuure. github.com/python/typing/pull/201.

Issue #26777: Fix random failing of the test on the "AMD64 FreeBSD 9.x 3.5"
buildbot:

    File ".../Lib/test/test_asyncio/test_tasks.py", line 2398, in go
      self.assertTrue(0.09 < dt < 0.11, dt)
    AssertionError: False is not true : 0.11902812402695417

Replace "< 0.11" with "< 0.15".