[issue33623] Fix possible SIGSGV when asyncio.Future is created in __del__

[Yury Selivanov]

Change by Yury Selivanov <yselivanov at gmail.com>:


----------
components: +asyncio
nosy: +asvetlov

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33623>
_______________________________________