无JIRA任务 fix更新

dist/fix/fix.js

@@ -456,11 +456,13 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
         var ob = void 0;
         if (value.__ob__ instanceof Observer) {
             ob = value.__ob__;
-        } else if (observerState.shouldConvert && (_.isArray(value) || isPlainObject(value))) {
+        } else if (observerState.shouldConvert && Object.isExtensible(value) && (_.isArray(value) || isPlainObject(value))) {
             ob = new Observer(value);
         }
+        if (ob) {
             ob.parent = parentObserver || ob.parent;
             ob.parentKey = parentKey;
+        }
         return ob;
     }