gh-128563: Clarify wording in Whats new for Tail call #130911

Fidget-Spinner · 2025-03-06T13:31:15Z

Pointed out by @smarr that the old wording was confusing.

bedevere-bot · 2025-03-06T16:26:08Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL9 Refleaks 3.x (tier-3) has failed when building commit 9c69150.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1589/builds/1066) and take a look at the build logs.
Check if the failure is related to this commit (9c69150) or if it is a false positive.
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/#/builders/1589/builds/1066

Failed tests:

test.test_multiprocessing_spawn.test_manager

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 1625, in f
    woken.release()
    ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 1067, in release
    return self._callmethod('release')
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 848, in _callmethod
    raise convert_to_error(kind, result)
multiprocessing.managers.RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 264, in serve_client
    self.id_to_local_proxy_obj[ident]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: '3ff875974e0'


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 1625, in f
    woken.release()
    ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 1067, in release
    return self._callmethod('release')
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 848, in _callmethod
    raise convert_to_error(kind, result)
multiprocessing.managers.RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 264, in serve_client
    self.id_to_local_proxy_obj[ident]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: '3ff8b617620'


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 1625, in f
    woken.release()
    ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 1067, in release
    return self._callmethod('release')
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 848, in _callmethod
    raise convert_to_error(kind, result)
multiprocessing.managers.RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 264, in serve_client
    self.id_to_local_proxy_obj[ident]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: '3ff87635aa0'


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 1625, in f
    woken.release()
    ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 1067, in release
    return self._callmethod('release')
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 848, in _callmethod
    raise convert_to_error(kind, result)
multiprocessing.managers.RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 264, in serve_client
    self.id_to_local_proxy_obj[ident]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: '3ff8e6b5aa0'


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/_test_multiprocessing.py", line 1625, in f
    woken.release()
    ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 1067, in release
    return self._callmethod('release')
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 848, in _callmethod
    raise convert_to_error(kind, result)
multiprocessing.managers.RemoteError: 
---------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 264, in serve_client
    self.id_to_local_proxy_obj[ident]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
KeyError: '3ff76cb5aa0'


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 266, in serve_client
    raise ke
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 260, in serve_client
    obj, exposed, gettypeid = id_to_obj[ident]
                              ~~~~~~~~~^^^^^^^
KeyError: '3ff8e6b5aa0'
---------------------------------------------------------------------------
Timeout (0:45:00)!
Thread 0x000003ff99073740 (most recent call first):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/popen_fork.py", line 28 in poll
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/popen_fork.py", line 44 in wait
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 149 in join
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 623 in _callCleanup
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 697 in doCleanups
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 664 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 716 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/runner.py", line 259 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 84 in _run_suite
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 42 in run_unittest
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 162 in test_func
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/refleak.py", line 132 in runtest_refleak
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 114 in regrtest_runner
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 165 in _load_run_test
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 210 in _runtest_env_changed_exc
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 319 in _runtest
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 348 in run_single_test
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 92 in worker_process
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 127 in main
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 131 in <module>
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/runpy.py", line 88 in _run_code
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/runpy.py", line 198 in _run_module_as_main


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 266, in serve_client
    raise ke
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 260, in serve_client
    obj, exposed, gettypeid = id_to_obj[ident]
                              ~~~~~~~~~^^^^^^^
KeyError: '3ff76cb5aa0'
---------------------------------------------------------------------------
Timeout (0:45:00)!
Thread 0x000003ff9c173740 (most recent call first):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/popen_fork.py", line 28 in poll
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/popen_fork.py", line 44 in wait
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/process.py", line 149 in join
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 623 in _callCleanup
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 697 in doCleanups
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 664 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/case.py", line 716 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/unittest/runner.py", line 259 in run
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 84 in _run_suite
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 42 in run_unittest
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 162 in test_func
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/refleak.py", line 132 in runtest_refleak
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 114 in regrtest_runner
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 165 in _load_run_test
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 210 in _runtest_env_changed_exc
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 319 in _runtest
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/single.py", line 348 in run_single_test
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 92 in worker_process
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 127 in main
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/test/libregrtest/worker.py", line 131 in <module>
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/runpy.py", line 88 in _run_code
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/runpy.py", line 198 in _run_module_as_main


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 266, in serve_client
    raise ke
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 260, in serve_client
    obj, exposed, gettypeid = id_to_obj[ident]
                              ~~~~~~~~~^^^^^^^
KeyError: '3ff875974e0'
---------------------------------------------------------------------------
k


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 266, in serve_client
    raise ke
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 260, in serve_client
    obj, exposed, gettypeid = id_to_obj[ident]
                              ~~~~~~~~~^^^^^^^
KeyError: '3ff8b617620'
---------------------------------------------------------------------------
k


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 266, in serve_client
    raise ke
  File "/home/buildbot/buildarea/3.x.cstratak-rhel9-s390x.refleak/build/Lib/multiprocessing/managers.py", line 260, in serve_client
    obj, exposed, gettypeid = id_to_obj[ident]
                              ~~~~~~~~~^^^^^^^
KeyError: '3ff87635aa0'
---------------------------------------------------------------------------
k

hauntsaninja · 2025-03-07T10:00:23Z

Doc/whatsnew/3.14.rst

@@ -301,11 +301,11 @@ For further information on how to build Python, see
    cautiously revised down to 3-5%. While we expect performance results to be better


thanks for updating the docs! it's been interesting following along the journey :-)
maybe a silly question, why do we expect performance numbers to be better than what we report?

The computed goto bug in theory shouldnt affect modern systems that much, but it's unclear for now so I just put that therr.

…30911) Clarify wording in Whats new for Tail call

Clarify wording in Whats new for Tail call

afd2397

bedevere-app bot added docs Documentation in the Doc dir skip news awaiting core review labels Mar 6, 2025

github-project-automation bot added this to Docs PRs Mar 6, 2025

github-project-automation bot moved this to Todo in Docs PRs Mar 6, 2025

bedevere-app bot mentioned this pull request Mar 6, 2025

A new tail-calling interpreter for significantly better interpreter performance #128563

Closed

Fidget-Spinner enabled auto-merge (squash) March 6, 2025 13:32

Fidget-Spinner merged commit 9c69150 into python:main Mar 6, 2025
31 checks passed

github-project-automation bot moved this from Todo to Done in Docs PRs Mar 6, 2025

bedevere-app bot removed the awaiting core review label Mar 6, 2025

Fidget-Spinner mentioned this pull request Mar 6, 2025

gh-128563: Add correction note to tail call in whats new #130908

Merged

hauntsaninja reviewed Mar 7, 2025

View reviewed changes

seehwan pushed a commit to seehwan/cpython that referenced this pull request Apr 16, 2025

pythongh-128563: Clarify wording in Whats new for Tail call (python#1…

c699afa

…30911) Clarify wording in Whats new for Tail call

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gh-128563: Clarify wording in Whats new for Tail call #130911

gh-128563: Clarify wording in Whats new for Tail call #130911

Fidget-Spinner commented Mar 6, 2025 •

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bedevere-bot commented Mar 6, 2025

hauntsaninja Mar 7, 2025 •

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Fidget-Spinner Mar 7, 2025

		@@ -301,11 +301,11 @@ For further information on how to build Python, see
		cautiously revised down to 3-5%. While we expect performance results to be better

gh-128563: Clarify wording in Whats new for Tail call #130911

gh-128563: Clarify wording in Whats new for Tail call #130911

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Fidget-Spinner commented Mar 6, 2025 • edited Loading

bedevere-bot commented Mar 6, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

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Fidget-Spinner commented Mar 6, 2025 •

edited

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hauntsaninja Mar 7, 2025 •

edited

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