swallow "Event loop is closed" from selector thread
swallow "Event loop is closed" from selector thread

same catch as in `add_callback` for the same reasons - the selector thread may race with an asyncio_loop.close in the main thread

seen running tests with pytest-asyncio

lilydjwg/tornado,lilydjwg/tornado,tornadoweb/tornado,tornadoweb/tornado,tornadoweb/tornado,lilydjwg/tornado,lilydjwg/tornado,tornadoweb/tornado