From b1431e1d33064b03cb18c73f164b51a22b6ce9fb Mon Sep 17 00:00:00 2001
From: chengtingsen <chengtingsen@chunyu.me>
Date: Tue, 27 Apr 2021 00:05:23 +0800
Subject: [PATCH] fix: For the $set returned in advance, should judge whether
 there is responsive processing.

---
 src/core/observer/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/observer/index.js b/src/core/observer/index.js
index 545adb64025..0a86d435809 100644
--- a/src/core/observer/index.js
+++ b/src/core/observer/index.js
@@ -209,7 +209,8 @@ export function set (target: Array<any> | Object, key: any, val: any): any {
     target.splice(key, 1, val)
     return val
   }
-  if (key in target && !(key in Object.prototype)) {
+  const property = Object.getOwnPropertyDescriptor(target, key)
+  if (key in target && !(key in Object.prototype) && (property && property.get)) {
     target[key] = val
     return val
   }