fix: guard

packages/entity/traits/spawner.trait.js

@@ -112,6 +112,9 @@ export default class Spawner extends decorate(Trait) {
   }
 
   static optionsForSpawn(entity) {
+    if (!entity) {
+      return undefined;
+    }
     return Object.keys(entity.traitInstance('spawner').params.spawns)
       .reduce((r, key) => ({...r, [key]: key}), {});
   }