Cleanup terminated processes as well.
Add cmd attribute to Popen4.

Rename file -> filename to be clear.

Will backport.

commands. If there are active commands when the tests
start, fail, printing these commands.

child process is closed when the test completes.

and later versions because they bumped the default setting to
get our basic tests to run correctly..

BSD make stops the build when it tries to expand wild cards on empty
directories.

wrt to ssize_t.

to stop truncating it.

Fix crash when a Unicode string containing an encoding declaration is
compile()d. Fixes #1115379.

on 64-bit platforms.

Don't use SEH when compiling wth mingw.
Use IS_INTRESOURCE to determine function name from function ordinal.

Rewrite the code that allocates and frees callback functions, hopefully
this avoids the coverty warnings: Remove the THUNK typedef, and move the
definition of struct ffi_info into the header file.

comments in the file. (SF #1455641)

was used unmotivated in the pow() docs)

as diagnosed by Nick Coghlan.

test_capi.py:  A test module should never spawn a thread as
a side effect of being imported.  Because this one did, the
segfault one of its thread tests caused didn't occur until
a few tests after test_regrtest.py thought test_capi was
finished.  Repair that.  Also join() the thread spawned
at the end, so that test_capi is truly finished when
regrtest reports that it's done.

_testcapimodule.c test_thread_state():  this spawns a
couple of non-threading.py threads, passing them a PyObject*
argument, but did nothing to ensure that those threads
finished before returning.  As a result, the PyObject*
_could_ (although this was unlikely) get decref'ed out of
existence before the threads got around to using it.
Added explicit synchronization (via a Python mutex) so
that test_thread_state can reliably wait for its spawned
threads to finish.