From 8cbeed5f053486b2e81fa40e853fec789f404ea8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E7=91=9E?= <412285675@qq.com>
Date: Wed, 12 Sep 2018 16:03:23 +0800
Subject: [PATCH] =?UTF-8?q?=E6=97=A0JIRA=E4=BB=BB=E5=8A=A1=20fix=E6=9B=B4?=
 =?UTF-8?q?=E6=96=B0?=
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---
 dist/fix/fix.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/dist/fix/fix.js b/dist/fix/fix.js
index 84f349a2e1..94074b034b 100644
--- a/dist/fix/fix.js
+++ b/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);
         }
-        ob.parent = parentObserver || ob.parent;
-        ob.parentKey = parentKey;
+        if (ob) {
+            ob.parent = parentObserver || ob.parent;
+            ob.parentKey = parentKey;
+        }
         return ob;
     }