[BUG]Exceptions are sometimes reported when the browser is not closed

[liuyazhou1991]

Context:

• Playwright Version: 1.18.1
• Operating System: Windows
• Node.js version: 12.22, 14.6
• Browser: Chromium
  -Python version: 3.8 x86

Code Snippet

from playwright.sync_api import sync_playwright

def run(playwright):

    browser = playwright.chromium.connect_over_cdp("http://localhost:9222")
    page = browser.new_page()
    page.goto("http://example.com/")

with sync_playwright() as playwright:
    run(playwright)

Describe the bug

Sometimes report mistakes：

Exception ignored in: <function BaseSubprocessTransport.__del__ at 0x000002674D05BF78>
Traceback (most recent call last):
  File "C:\Python\lib\asyncio\base_subprocess.py", line 127, in __del__
  File "C:\Python\lib\asyncio\base_subprocess.py", line 104, in close
  File "C:\Python\lib\asyncio\proactor_events.py", line 86, in close
  File "C:\Python\lib\asyncio\base_events.py", line 694, in call_soon
  File "C:\Python\lib\asyncio\base_events.py", line 480, in _check_closed
RuntimeError: Event loop is closed

[aslushnikov]

@liuyazhou1991 well, this doesn't share much details. Can you help us reproduce this? We need something that we can run locally and see the error ourselves!

[liuyazhou1991]

@aslushnikov Not every run will make mistakes, sometimes. Just run the following code to reproduce. The premise is that it has been connected through chrome devtools protocol：

from playwright.sync_api import sync_playwright
def run(playwright):

    browser = playwright.chromium.connect_over_cdp("http://localhost:9222")
    page = browser.new_page()
    page.goto("http://example.com/")
for i in range(10):
    with sync_playwright() as playwright:
        run(playwright)

[aca]

Same here, It returns error if I run other things after the playwright context.

λ python3 run.py
Loop <_UnixSelectorEventLoop running=False closed=True debug=False> that handles pid 618225 is closed
<Response [200]>
Exception ignored in: <function BaseSubprocessTransport.__del__ at 0x7feccf255750>
Traceback (most recent call last):
  File "/usr/lib/python3.10/asyncio/base_subprocess.py", line 126, in __del__
  File "/usr/lib/python3.10/asyncio/base_subprocess.py", line 104, in close
  File "/usr/lib/python3.10/asyncio/unix_events.py", line 546, in close
  File "/usr/lib/python3.10/asyncio/unix_events.py", line 570, in _close
  File "/usr/lib/python3.10/asyncio/base_events.py", line 745, in call_soon
  File "/usr/lib/python3.10/asyncio/base_events.py", line 510, in _check_closed
RuntimeError: Event loop is closed

λ cat run.py
from playwright.sync_api import sync_playwright

def get_cookies(playwright):
    browser = playwright.chromium.connect_over_cdp("http://127.0.0.1:9222/")
    context = browser.contexts[0]
    cookies = context.cookies("https://google.com")
    return {cookie["name"]: cookie["value"] for cookie in cookies}

cookies =  {}
with sync_playwright() as playwright:
    cookies = get_cookies(playwright)

import requests
print(requests.get("https://google.com", cookies=cookies))