From 6f8316fe8f8e0a0697af9a625004097ad59eadc9 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Sun, 11 Sep 2016 12:17:59 +0200
Subject: [PATCH] toObject should not mutate original objects (fix #3657)

---
 src/shared/util.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/shared/util.js b/src/shared/util.js
index 7deaef15..afdd9a1a 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -170,8 +170,8 @@ export function isPlainObject (obj: any): boolean {
  * Merge an Array of Objects into a single Object.
  */
 export function toObject (arr: Array<any>): Object {
-  const res = arr[0] || {}
-  for (let i = 1; i < arr.length; i++) {
+  const res = {}
+  for (let i = 0; i < arr.length; i++) {
     if (arr[i]) {
       extend(res, arr[i])
     }