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Description
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 supportedAlso `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