RuntimeError: Cannot close a running event loop

[guomaoqiu]

- Error:
Traceback (most recent call last):
File "/Users/Green/py36/lib/python3.6/site-packages/tornado/ioloop.py", line 1229, in _run
return self.callback()
File "/Users/Green/py36/lib/python3.6/site-packages/tornado/autoreload.py", line 185, in _reload_on_update
_check_file(modify_times, path)
File "/Users/Green/py36/lib/python3.6/site-packages/tornado/autoreload.py", line 200, in _check_file
_reload()
File "/Users/Green/py36/lib/python3.6/site-packages/tornado/autoreload.py", line 207, in _reload
fn()
File "/Users/Green/py36/lib/python3.6/site-packages/livereload/server.py", line 310, in
add_reload_hook(lambda: IOLoop.instance().close(all_fds=True))
File "/Users/Green/py36/lib/python3.6/site-packages/tornado/platform/asyncio.py", line 71, in close
self.asyncio_loop.close()
File "/Users/Green/.pyenv/versions/3.6.0/lib/python3.6/asyncio/unix_events.py", line 63, in close
super().close()
File "/Users/Green/.pyenv/versions/3.6.0/lib/python3.6/asyncio/selector_events.py", line 107, in close
raise RuntimeError("Cannot close a running event loop")
RuntimeError: Cannot close a running event loop

- Run ENV:
python 3.6
livereload: 2.5.2

my flask app manager settings:

@manager.command
def dev():
live_server = Server(app.wsgi_app)
live_server.watch('/')
live_server.serve(open_url=False,port=5000,debug=True)

When I press ctrl+c to save the file, terminal reports an error.
My app is running as ：
~/py36/bin/python manager.py dev

please help me thanks.

[cmbasnett]

You may need to downgrade to 2.5.1: #170

[kariavka]

@cmbasnett ❤❤❤

Thank you! That was so helpfull!

[d1618033]

I get the same bug.

It seems that in tornado they decided to remove the ioloop.close because it's unneeded in python 3.4+.
A few months later, the ioloop.close was added to python-livereload. This is what caused the aforementioned bug to occur.

[EpicCodeWizard]

Versions 2.5.2+ have this issue. Downgrade to version 2.5.1 (pip install livereload==2.5.1).

[rpaladin]

I downgraded to 2.5.1 as suggested, but then I get the error mentioned in #209.

What is the proposed solution if we're not allowed to use later versions and past versions are broken or incompatible?