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Bug report
Seen on Windows free threading build, but not free threading specific:
https://github.com/python/cpython/actions/runs/13606907022/job/38039459160?pr=130732
This is in Windows specific code. Not yet sure if this is free threading specific.
ERROR: test_async_error_callback (test.test_multiprocessing_spawn.test_processes.WithProcessesTestPoolWorkerErrors.test_async_error_callback)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\_test_multiprocessing.py", line 3101, in test_async_error_callback
p.close()
~~~~~~~^^
File "D:\a\cpython\cpython\Lib\multiprocessing\pool.py", line 652, in close
self._change_notifier.put(None)
~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\queues.py", line 394, in put
self._writer.send_bytes(obj)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\connection.py", line 206, in send_bytes
self._send_bytes(m[offset:offset + size])
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\connection.py", line 293, in _send_bytes
raise ValueError("concurrent send_bytes() calls "
"are not supported")
ValueError: concurrent send_bytes() calls are not supported
Also `test_traceback`:
ERROR: test_traceback (test.test_multiprocessing_spawn.test_processes.WithProcessesTestPool.test_traceback)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\_test_multiprocessing.py", line 2974, in test_traceback
with self.Pool(1) as p:
~~~~~~~~~^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\pool.py", line 739, in __exit__
self.terminate()
~~~~~~~~~~~~~~^^
File "D:\a\cpython\cpython\Lib\multiprocessing\pool.py", line 657, in terminate
self._terminate()
~~~~~~~~~~~~~~~^^
File "D:\a\cpython\cpython\Lib\multiprocessing\util.py", line 216, in __call__
res = self._callback(*self._args, **self._kwargs)
File "D:\a\cpython\cpython\Lib\multiprocessing\pool.py", line 690, in _terminate_pool
change_notifier.put(None)
~~~~~~~~~~~~~~~~~~~^^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\queues.py", line 394, in put
self._writer.send_bytes(obj)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\connection.py", line 206, in send_bytes
self._send_bytes(m[offset:offset + size])
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\a\cpython\cpython\Lib\multiprocessing\connection.py", line 293, in _send_bytes
raise ValueError("concurrent send_bytes() calls "
"are not supported")
ValueError: concurrent send_bytes() calls are not supported
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Tests in the Lib/test dirTests in the Lib/test dirAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error