just a safety measure for the rare case that the FRC delegate gets released earlier than the FRC

CoreStore/Observing/ListMonitor.swift

@@ -924,6 +924,11 @@ public final class ListMonitor<T: NSManagedObject> {
         try! fetchedResultsController.performFetch()
     }
     
+    deinit {
+        
+        self.fetchedResultsControllerDelegate.fetchedResultsController = nil
+    }
+    
     
     // MARK: Private
     

CoreStore/Observing/ObjectMonitor.swift

@@ -198,6 +198,11 @@ public final class ObjectMonitor<T: NSManagedObject> {
         self.lastCommittedAttributes = (self.object?.committedValuesForKeys(nil) as? [String: NSObject]) ?? [:]
     }
     
+    deinit {
+        
+        self.fetchedResultsControllerDelegate.fetchedResultsController = nil
+    }
+    
     
     // MARK: Private