[issue34679] asyncio.add_signal_handler call fails if not on main thread

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


----------
pull_requests: +16439
pull_request: https://github.com/python/cpython/pull/16902

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34679>
_______________________________________