Just return, no object

src/directives/repeat.js

@@ -684,7 +684,7 @@ module.exports = {
 function findPrevVm (vm, anchor, id) {
   var el = vm.$el.previousSibling
   if (!el) {
-      return {}
+      return
   }
   while (
     (!el.__vue__ || el.__vue__.$options._repeatId !== id) &&