Fix event handler memory leak (#2298)

* fix event handler memory leak and double drops

* Prevent double dropping generational boxes

* recycle instead of dropping

packages/generational-box/src/sync.rs

@@ -100,8 +100,9 @@ impl AnyStorage for SyncStorage {
     }
 
     fn recycle(location: &MemoryLocation<Self>) {
+        let location = *location;
         location.drop();
-        sync_runtime().lock().push(*location);
+        sync_runtime().lock().push(location);
     }
 }