[BUG]ValueError: I/O operation on closed pipe

[wanghaisheng]

Context:

• Playwright Version: [1.20.1]
• Operating System: [both Windows, Linux tried]
• Python version: [3.8.5,3.7]
• Browser: [firefox]
• Extra: [any specific details about your environment]

Code Snippet
to reproduce
https://github.com/wanghaisheng/scraper-on-github-action/blob/main/upwork.py

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Describe the bug

Exception ignored in: <function BaseSubprocessTransport.__del__ at 0x00000272824F4670>
Traceback (most recent call last):
  File "D:\Program Files\anaconda3\lib\asyncio\base_subprocess.py", line 125, in __del__  
    _warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
  File "D:\Program Files\anaconda3\lib\asyncio\base_subprocess.py", line 70, in __repr__  
    info.append(f'stdin={stdin.pipe}')
  File "D:\Program Files\anaconda3\lib\asyncio\proactor_events.py", line 79, in __repr__  
    info.append(f'fd={self._sock.fileno()}')
  File "D:\Program Files\anaconda3\lib\asyncio\windows_utils.py", line 102, in fileno     
    raise ValueError("I/O operation on closed pipe")
ValueError: I/O operation on closed pipe
Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000272824FBD30> 
Traceback (most recent call last):
  File "D:\Program Files\anaconda3\lib\asyncio\proactor_events.py", line 115, in __del__  
    _warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
  File "D:\Program Files\anaconda3\lib\asyncio\proactor_events.py", line 79, in __repr__  
    info.append(f'fd={self._sock.fileno()}')
  File "D:\Program Files\anaconda3\lib\asyncio\windows_utils.py", line 102, in fileno     
    raise ValueError("I/O operation on closed pipe")
ValueError: I/O operation on closed pipe
Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000272824FBD30> 
Traceback (most recent call last):
  File "D:\Program Files\anaconda3\lib\asyncio\proactor_events.py", line 115, in __del__  
    _warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
  File "D:\Program Files\anaconda3\lib\asyncio\proactor_events.py", line 79, in __repr__  
    info.append(f'fd={self._sock.fileno()}')
  File "D:\Program Files\anaconda3\lib\asyncio\windows_utils.py", line 102, in fileno     
    raise ValueError("I/O operation on closed pipe")
ValueError: I/O operation on closed pipe

[mxschmitt]

Your repro is very big and does not have any Playwright in it. Is there a chance to make your repro a bit smaller?

Unrelated to your repro but related to your logs I'm pretty sure we we'll address the fix with the following PR: #1213

[wanghaisheng]

@mxschmitt I just remove other dep in this stanlone py you can just download this py to have a try