Fix attribute error

Author: kyb3r

core/thread.py

@@ -388,7 +388,7 @@ async def _restart_close_timer(self):
         This will create or restart a timer to automatically close this
         thread.
         """
-        timeout = await self._grab_timeout()
+        timeout = await self._fetch_timeout()
 
         # Exit if timeout was not set
         if timeout is None: