bpo-42246: Mark POP_TOP at end of expression statement as artificial, to conform to PEP 626.

[markshannon]

https://bugs.python.org/issue42246

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD Non-Debug 3.x has failed when building commit c544093.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/172/builds/41) and take a look at the build logs.
4. Check if the failure is related to this commit (c544093) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/172/builds/41

Summary of the results of the build (if available):

Click to see traceback logs

remote: Enumerating objects: 13, done.        
remote: Counting objects:   7% (1/13)        
remote: Counting objects:  15% (2/13)        
remote: Counting objects:  23% (3/13)        
remote: Counting objects:  30% (4/13)        
remote: Counting objects:  38% (5/13)        
remote: Counting objects:  46% (6/13)        
remote: Counting objects:  53% (7/13)        
remote: Counting objects:  61% (8/13)        
remote: Counting objects:  69% (9/13)        
remote: Counting objects:  76% (10/13)        
remote: Counting objects:  84% (11/13)        
remote: Counting objects:  92% (12/13)        
remote: Counting objects: 100% (13/13)        
remote: Counting objects: 100% (13/13), done.        
remote: Compressing objects:  25% (1/4)        
remote: Compressing objects:  50% (2/4)        
remote: Compressing objects:  75% (3/4)        
remote: Compressing objects: 100% (4/4)        
remote: Compressing objects: 100% (4/4), done.        
remote: Total 7 (delta 6), reused 3 (delta 3), pack-reused 0        
From https://github.com/python/cpython
 * branch                  master     -> FETCH_HEAD
Reset branch 'master'

/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/./setup.py:33: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils import log

/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/./setup.py:33: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils import log
test_flock (__main__.FNTLEINTRTest) ... ok
test_lockf (__main__.FNTLEINTRTest) ... ok
test_read (__main__.OSEINTRTest) ... ok
test_wait (__main__.OSEINTRTest) ... ok
test_wait3 (__main__.OSEINTRTest) ... ok
test_wait4 (__main__.OSEINTRTest) ... ok
test_waitpid (__main__.OSEINTRTest) ... ok
test_write (__main__.OSEINTRTest) ... ok
test_devpoll (__main__.SelectEINTRTest) ... skipped 'need select.devpoll'
test_epoll (__main__.SelectEINTRTest) ... skipped 'need select.epoll'
test_kqueue (__main__.SelectEINTRTest) ... ok
test_poll (__main__.SelectEINTRTest) ... ok
test_select (__main__.SelectEINTRTest) ... ok
test_sigtimedwait (__main__.SignalEINTRTest) ... ok
test_sigwaitinfo (__main__.SignalEINTRTest) ... ok
test_accept (__main__.SocketEINTRTest) ... ok
test_open (__main__.SocketEINTRTest) ... ok
test_os_open (__main__.SocketEINTRTest) ... ok
test_recv (__main__.SocketEINTRTest) ... ok
test_recvmsg (__main__.SocketEINTRTest) ... ok
test_send (__main__.SocketEINTRTest) ... ok
test_sendall (__main__.SocketEINTRTest) ... ok
test_sendmsg (__main__.SocketEINTRTest) ... ok
test_sleep (__main__.TimeEINTRTest) ... ok

----------------------------------------------------------------------
Ran 24 tests in 7.129s

OK (skipped=2)
test_tcl skipped -- No module named '_tkinter'
test_devpoll skipped -- test works only on Solaris OS family
test_idle skipped -- No module named '_tkinter'
test_tk skipped -- No module named '_tkinter'
test_winsound skipped -- No module named 'winsound'
test_ttk_guionly skipped -- No module named '_tkinter'
test_dbm_gnu skipped -- No module named '_gdbm'
test_msilib skipped -- No module named '_msi'
test_ioctl skipped -- Unable to open /dev/tty
test_tix skipped -- No module named '_tkinter'
test_readline skipped -- No module named 'readline'
test_ossaudiodev skipped -- [Errno 2] No such file or directory: '/dev/dsp'
test_epoll skipped -- test works only on Linux 2.6
test_spwd skipped -- No module named 'spwd'
test_winconsoleio skipped -- test only relevant on win32
test_badargs (__main__.GeneralTest) ... ok
test_bound_methods (__main__.GeneralTest) ... ok
test_clear (__main__.GeneralTest) ... ok
test_exit (__main__.GeneralTest) ... ok
test_order (__main__.GeneralTest) ... ok
test_raise (__main__.GeneralTest) ... ok
test_raise_unnormalized (__main__.GeneralTest) ... ok
test_stress (__main__.GeneralTest) ... ok
test_unregister (__main__.GeneralTest) ... ok

----------------------------------------------------------------------
Ran 9 tests in 0.004s

OK
test_zipfile64 skipped -- test requires loads of disk-space bytes and a long time to run
/tmp/tmpxjz9rvg8/parse.c:138:19: warning: code will never be executed [-Wunreachable-code]
        p->mark = _mark;
                  ^~~~~
1 warning generated.
test_ttk_textonly skipped -- No module named '_tkinter'
/tmp/tmpfwqkfz62.py:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils.util import byte_compile
/tmp/tmphatfvxmo.py:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils.util import byte_compile

Cannot open file '/usr/home/buildbot/python/3.x.koobs-freebsd-9e36.nondebug/build/test-results.xml' for upload