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Description
Bug report
When running the following code, I ran into some unresolved future error message as shown below:
#!/usr/bin/env pythonimport sysimport osimport asyncioasync def main_task(): print(sys.version) xxx = "x" * 196428 incoming_original_data = xxx.encode() print(f"stdin len: {len(incoming_original_data)}") proc = await asyncio.create_subprocess_shell( f"xxd -l 1", stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE) await proc.communicate(input = incoming_original_data) print("subprocess ended")def main(): opts = asyncio.run(main_task()) print(f"main END") return optsif __name__ == '__main__': main()Output
3.11.3 (main, Apr 7 2023, 19:25:52) [Clang 14.0.0 (clang-1400.0.29.202)]stdin len: 196428subprocess endedmain ENDFuture exception was never retrievedfuture: <Future finished exception=BrokenPipeError(32, 'Broken pipe')>Traceback (most recent call last): File "/usr/local/Cellar/python@3.11/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/subprocess.py", line 152, in _feed_stdin await self.stdin.drain() File "/usr/local/Cellar/python@3.11/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/streams.py", line 378, in drain await self._protocol._drain_helper() File "/usr/local/Cellar/python@3.11/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/streams.py", line 173, in _drain_helper await waiter File "/usr/local/Cellar/python@3.11/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/unix_events.py", line 709, in _write_ready n = os.write(self._fileno, self._buffer) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^BrokenPipeError: [Errno 32] Broken pipeBecause the child process exited so early, aBrokenPipeError was raised, and the event loop tries to disconnect relevant internal pipes, but one future_stdin_closed ( insubprocess.py ) is not properly handled. It's introduced in#13098
I also tested on Python 3.7.17 there's no such error message.
Your environment
- CPython versions tested on: Python 3.11.3, 3.7.17
- Operating system and architecture: macOS Ventura 13.3
Some links I found helpful:
Could you help take a look?@asvetlov
cc@1st1