From 4c7a87e2ef9c76b5b75d85102662a27165a23ec7 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Fri, 9 Sep 2016 13:54:24 +0200
Subject: [PATCH] observer conversion enumeration should not include prototype
 properties

---
 src/core/observer/index.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/core/observer/index.js b/src/core/observer/index.js
index 29a12d55..df734dbf 100644
--- a/src/core/observer/index.js
+++ b/src/core/observer/index.js
@@ -58,9 +58,9 @@ export class Observer {
    * value type is Object.
    */
   walk (obj: Object) {
-    const val = this.value
-    for (const key in obj) {
-      defineReactive(val, key, obj[key])
+    const keys = Object.keys(obj)
+    for (let i = 0; i < keys.length; i++) {
+      defineReactive(obj, keys[i], obj[keys[i]])
     }
   }