gh-137093: Fix race condition in `test_embed.test_bpo20891` by ZeroIntensity · Pull Request #137094 · python/cpython

ZeroIntensity · Jul 25, 2025

Use a PyEvent instead of a lock to fix a race on the free-threaded build.

Issue: test_embed.test_bpo20891 is racy under free-threading #137093

ZeroIntensity · Jul 25, 2025

!buildbot nogil

bedevere-bot · Jul 25, 2025

🤖 New build scheduled with the buildbot fleet by @ZeroIntensity for commit 166cfd7 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F137094%2Fmerge

The command will test the builders whose names match following regular expression: nogil

The builders matched are:

aarch64 Fedora Rawhide NoGIL refleaks PR
AMD64 CentOS9 NoGIL PR
AMD64 Fedora Rawhide NoGIL PR
x86-64 MacOS Intel NoGIL PR
AMD64 Windows PGO NoGIL PR
aarch64 Fedora Rawhide NoGIL PR
s390x Fedora Rawhide NoGIL refleaks PR
PPC64LE Fedora Rawhide NoGIL PR
AMD64 Windows Server 2022 NoGIL PR
ARM64 MacOS M1 NoGIL PR
ARM64 MacOS M1 Refleaks NoGIL PR
AMD64 CentOS9 NoGIL Refleaks PR
x86-64 MacOS Intel ASAN NoGIL PR
AMD64 Fedora Rawhide NoGIL refleaks PR
s390x Fedora Rawhide NoGIL PR
PPC64LE Fedora Rawhide NoGIL refleaks PR

miss-islington-app · Jul 25, 2025

Thanks @ZeroIntensity for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

miss-islington-app · Jul 25, 2025

Thanks @ZeroIntensity for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

miss-islington-app · Jul 25, 2025

Sorry, @ZeroIntensity, I could not cleanly backport this to 3.14 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 9b451fb457a5de9ed535a0e2f41161dfaa9a419a 3.14

miss-islington-app · Jul 25, 2025

Sorry, @ZeroIntensity, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 9b451fb457a5de9ed535a0e2f41161dfaa9a419a 3.13

ZeroIntensity · Jul 25, 2025

I'm not going to bother with manually backporting. The whole reason we backport tests is to prevent conflicts, but since there are already conflicts, it doesn't matter.

…thonGH-137094) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build.

bedevere-app · Oct 24, 2025

GH-140524 is a backport of this pull request to the 3.14 branch.

…91` (pythonGH-137094) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build. (cherry picked from commit 9b451fb) Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

…H-137094) (#140524) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build. (cherry picked from commit 9b451fb) Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

…91` (pythonGH-137094) (pythonGH-140524) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build. (cherry picked from commit 9b451fb) (cherry picked from commit 6efd78d) Co-authored-by: Kumar Aditya <kumaraditya@python.org> Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

bedevere-bot · Oct 24, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 macOS 3.14 (tier-2) has failed when building commit 6efd78d.

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/1772/builds/626) and take a look at the build logs.
Check if the failure is related to this commit (6efd78d) 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/1772/builds/626

Failed tests:

test_urllib2net

Failed subtests:

test_ftp_default_timeout - test.test_urllib2net.TimeoutTest.test_ftp_default_timeout
test_ftp_basic - test.test_urllib2net.TimeoutTest.test_ftp_basic

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 54671), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 54673), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 54673), raddr=('68.183.26.59', 21)>
ERROR


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 54664), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 54667), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 54667), raddr=('68.183.26.59', 21)>
ERROR


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 54669), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 54675), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 54675), raddr=('68.183.26.59', 21)>


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1546, in ftp_open
    fp, retrlen = fw.retrfile(file, type)
                  ~~~~~~~~~~~^^^^^^^^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1826, in retrfile
    conn, retrlen = self.ftp.ntransfercmd(cmd)
                    ~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/ftplib.py", line 354, in ntransfercmd
    conn = socket.create_connection((host, port), self.timeout,
                                    source_address=self.source_address)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 870, in create_connection
    raise exceptions[0]
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 855, in create_connection
    sock.connect(sa)
    ~~~~~~~~~~~~^^^^
TimeoutError: timed out


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
ResourceWarning: unclosed <socket.socket fd=6, family=2, type=1, proto=6, laddr=('192.168.0.101', 50625), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 52718), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 52718), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 52921), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 52921), raddr=('68.183.26.59', 21)>


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 351, in test_ftp_default_timeout
    u = _urlopen_with_retry(self.FTP_HOST)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 28, in wrapped
    return _retry_thrice(func, exc, *args, **kwargs)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 24, in _retry_thrice
    raise last_exc
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 20, in _retry_thrice
    return func(*args, **kwargs)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 187, in urlopen
    return opener.open(url, data, timeout)
           ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 487, in open
    response = self._open(req, data)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 504, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
                              '_open', req)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 464, in _call_chain
    result = func(*args)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1556, in ftp_open
    raise URLError(f"ftp error: {exp}") from exp
urllib.error.URLError: <urlopen error ftp error: timed out>


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=6, family=2, type=1, proto=6, laddr=('192.168.0.101', 50177), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 50235), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 50235), raddr=('68.183.26.59', 21)>
ERROR


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1546, in ftp_open
    fp, retrlen = fw.retrfile(file, type)
                  ~~~~~~~~~~~^^^^^^^^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1826, in retrfile
    conn, retrlen = self.ftp.ntransfercmd(cmd)
                    ~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/ftplib.py", line 354, in ntransfercmd
    conn = socket.create_connection((host, port), self.timeout,
                                    source_address=self.source_address)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 870, in create_connection
    raise exceptions[0]
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 855, in create_connection
    sock.connect(sa)
    ~~~~~~~~~~~~^^^^
TimeoutError: [Errno 60] Operation timed out


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 51745), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored while finalizing socket <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 52677), raddr=('68.183.26.59', 21)>:
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 22, in _retry_thrice
    last_exc = e
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 52677), raddr=('68.183.26.59', 21)>
ERROR


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 342, in test_ftp_basic
    u = _urlopen_with_retry(self.FTP_HOST)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 28, in wrapped
    return _retry_thrice(func, exc, *args, **kwargs)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 24, in _retry_thrice
    raise last_exc
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 20, in _retry_thrice
    return func(*args, **kwargs)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 187, in urlopen
    return opener.open(url, data, timeout)
           ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 487, in open
    response = self._open(req, data)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 504, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
                              '_open', req)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 464, in _call_chain
    result = func(*args)
  File "/Users/buildbot/buildarea/3.14.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1556, in ftp_open
    raise URLError(f"ftp error: {exp}") from exp
urllib.error.URLError: <urlopen error ftp error: [Errno 60] Operation timed out>

…H-137094) (GH-140524) (#140527) [3.14] gh-137093: Fix race condition in `test_embed.test_bpo20891` (GH-137094) (GH-140524) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build. (cherry picked from commit 9b451fb) (cherry picked from commit 6efd78d) Co-authored-by: Kumar Aditya <kumaraditya@python.org> Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

bedevere-bot · Oct 24, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 macOS 3.13 (tier-2) has failed when building commit 050b9dd.

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/1404/builds/1351) and take a look at the build logs.
Check if the failure is related to this commit (050b9dd) 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/1404/builds/1351

Failed tests:

test_urllib2net

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/contextlib.py", line 136, in __enter__
    def __enter__(self):
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 58742), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58748), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/contextlib.py", line 136, in __enter__
    def __enter__(self):
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58748), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58756), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/contextlib.py", line 136, in __enter__
    def __enter__(self):
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58756), raddr=('68.183.26.59', 21)>
Timeout (0:20:00)!
Thread 0x00000001f9324800 (most recent call first):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 849 in create_connection
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/ftplib.py", line 354 in ntransfercmd
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 2458 in retrfile
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1548 in ftp_open
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 466 in _call_chain
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 506 in _open
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 489 in open
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 189 in urlopen
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 21 in _retry_thrice
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 29 in wrapped
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 373 in test_ftp_timeout
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 606 in _callTestMethod
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 651 in run
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 707 in __call__
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/suite.py", line 122 in run
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/suite.py", line 84 in __call__
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/suite.py", line 122 in run
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/suite.py", line 84 in __call__
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/runner.py", line 240 in run
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 57 in _run_suite
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 37 in run_unittest
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 135 in test_func
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 91 in regrtest_runner
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 138 in _load_run_test
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 181 in _runtest_env_changed_exc
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 281 in _runtest
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/single.py", line 310 in run_single_test
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/worker.py", line 77 in worker_process
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/worker.py", line 112 in main
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/test/libregrtest/worker.py", line 116 in <module>
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/runpy.py", line 88 in _run_code
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/runpy.py", line 198 in _run_module_as_main


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58751), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=10, family=2, type=1, proto=6, laddr=('192.168.0.101', 58754), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=10, family=2, type=1, proto=6, laddr=('192.168.0.101', 58754), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 58701), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58703), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58703), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58708), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58710), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58710), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58744), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58746), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('192.168.0.101', 58746), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=6, family=2, type=1, proto=6, laddr=('192.168.0.101', 58617), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 58697), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 58697), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"


Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=7, family=2, type=1, proto=6, laddr=('192.168.0.101', 58737), raddr=('68.183.26.59', 21)>
Warning -- Unraisable exception
Exception ignored in: <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58740), raddr=('68.183.26.59', 21)>
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/3.13.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 790, in close
    self._sock = None
ResourceWarning: unclosed <socket.socket fd=8, family=2, type=1, proto=6, laddr=('192.168.0.101', 58740), raddr=('68.183.26.59', 21)>
skipped "Resource 'ftp://www.pythontest.net/' is not available"

Fix race condition in test_embed

166cfd7

ZeroIntensity added skip news topic-free-threading labels Jul 25, 2025

bedevere-app bot added awaiting core review tests Tests in the Lib/test dir labels Jul 25, 2025

bedevere-app bot mentioned this pull request Jul 25, 2025

test_embed.test_bpo20891 is racy under free-threading #137093

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kumaraditya303 approved these changes Jul 25, 2025

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bedevere-app bot added awaiting merge and removed awaiting core review labels Jul 25, 2025

ZeroIntensity merged commit 9b451fb into python:main Jul 25, 2025
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bedevere-app bot removed the awaiting merge label Jul 25, 2025

ZeroIntensity deleted the fix-testembed branch July 25, 2025 12:33

ZeroIntensity added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jul 25, 2025

miss-islington-app bot assigned ZeroIntensity Jul 25, 2025

ZeroIntensity removed needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jul 25, 2025

taegyunkim pushed a commit to taegyunkim/cpython that referenced this pull request Aug 4, 2025

pythongh-137093: Fix race condition in test_embed.test_bpo20891 (py…

471448d

…thonGH-137094) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build.

Agent-Hellboy pushed a commit to Agent-Hellboy/cpython that referenced this pull request Aug 19, 2025

pythongh-137093: Fix race condition in test_embed.test_bpo20891 (py…

7f9a16f

…thonGH-137094) Use a `PyEvent` instead of a lock to fix a race on the free-threaded build.

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gh-137093: Fix race condition in `test_embed.test_bpo20891`#137094

gh-137093: Fix race condition in `test_embed.test_bpo20891`#137094
ZeroIntensity merged 1 commit intopython:mainpython/cpython:mainfrom
ZeroIntensity:fix-testembedZeroIntensity/cpython:fix-testembedCopy head branch name to clipboard

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