Fix infinite recursion while shutting down TrackerSession

src/tribler/core/torrent_checker/torrentchecker_session.py

@@ -59,6 +59,7 @@ def __init__(self, tracker_type: str, tracker_url: str, tracker_address: tuple[s
         self.timeout = timeout
         self.infohash_list: list[bytes] = []
         self.last_contact = 0
+        self.cleanup_task = None
 
         # some flags
         self.is_initiated = False  # you cannot add requests to a session if it has been initiated
@@ -102,8 +103,8 @@ def failed(self, msg: str | None = None) -> NoReturn:
 
         :raises ValueError: always.
         """
-        if not self.is_failed:
-            self.register_anonymous_task("Cleanup", self.cleanup)
+        if not self.is_failed and not self.cleanup_task:
+            self.cleanup_task = ensure_future(self.cleanup())
         self.is_failed = True
         result_msg = f"{self.tracker_type} tracker failed for url {self.tracker_url}"
         if msg: