refactor after rebase

libp2p/tools/async_service/base.py

@@ -18,6 +18,7 @@ import sys
 from typing import (
     Any,
     TypeVar,
+    cast,
 )
 import uuid
 
@@ -360,7 +361,7 @@ class BaseManager(InternalManagerAPI):
                 # Only show stacktrace if this is **not** a DaemonTaskExit error
                 exc_info=not isinstance(err, DaemonTaskExit),
             )
-            self._errors.append(sys.exc_info())
+            self._errors.append(cast(EXC_INFO, sys.exc_info()))
             self.cancel()
         else:
             if task.parent is None: