(grafted from c80083ad142db2939507800c755082293a87f2de)

descriptor 0, 1 or 2 is closed.
The errpipe_write fd will always be >= 3.

Patch by Daniel Urban.

causing test_multiprocessing_forkserver and test_multiprocessing_spawn
failures on head (3.4).

descriptor 0, 1 or 2 is closed.

This fix does not cause any degradation in performance.

pythoncore sub-project.  This should prevent build errors due a previous
build's python(_d).exe still running.

of the time.  Patch by Julian Gindi.

virtual interface.  Original patch by Kent Frazier.

Issue #19638: Raise ValueError instead of crashing when converting billion character strings to float.

time.strptime().  Initial patch by Claudiu Popa.

Also, attempt to reduce confusion in the glossary by not saying there are
different "types" of arguments and parameters.

big-endian platforms.

Temporary forbidden test_unseekable_incompleted_write fornot compressed 16-
and 32-bit wave file  on big-endian platforms.

csv was handling non-string keys fine except for the error message
generated when a non-string key was not in 'fieldnames'.

Fix by Tomas Grahn, full patch-with-test by Vajrasky Kok (tweaked slightly).

to avoid reporting success on empty tests.

on a system with SO_REUSEPORT defined in the headers but run on a system
with an OS kernel that does not support that reasonably new socket option.

A variable was declared below the top of a block and one function was using
a K&R C style function declaration!

Issue #19544 and Issue #6286: Restore use of urllib over http allowing use of http_proxy for Distutils upload command, a feature accidentally lost in the rollback of distutils2.

Issue 19544 and Issue #7457: Restore the read_pkg_file method to distutils.dist.DistributionMetadata accidentally removed in the undo of distutils2.

Some third-party projects, such as matplotlib and PIL/Pillow,
depended on being able to build with Tcl and Tk frameworks in
/Library/Frameworks.  They were unable to build with the built-in
Tcl/Tk and/or execute correctly.