Catch and ignore exception in dataloader cleanup (#18772)

Signed-off-by: Mohammed Yasin <32206511+Y-T-G@users.noreply.github.com>

ultralytics/data/build.py

@@ -49,11 +49,15 @@ class InfiniteDataLoader(dataloader.DataLoader):
 
     def __del__(self):
         """Ensure that workers are terminated."""
-        if hasattr(self.iterator, "_workers"):
+        try:
+            if not hasattr(self.iterator, "_workers"):
+                return
             for w in self.iterator._workers:  # force terminate
                 if w.is_alive():
                     w.terminate()
             self.iterator._shutdown_workers()  # cleanup
+        except Exception:
+            pass
 
     def reset(self):
         """