From 34b7b5e0ddae6d8bd5df779cf464131da433e799 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=A5=BD=E5=A4=9A=E5=A4=A7=E7=B1=B3?= <lost1q84@gmail.com>
Date: Mon, 2 Aug 2021 11:16:35 +0800
Subject: [PATCH] Tree: fix insertChild (#21194)

---
 packages/tree/src/model/node.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/tree/src/model/node.js b/packages/tree/src/model/node.js
index 657b3b82be9..c72299582f4 100644
--- a/packages/tree/src/model/node.js
+++ b/packages/tree/src/model/node.js
@@ -220,7 +220,7 @@ export default class Node {
 
     if (!(child instanceof Node)) {
       if (!batch) {
-        const children = this.getChildren(true);
+        const children = this.getChildren(true) || [];
         if (children.indexOf(child.data) === -1) {
           if (typeof index === 'undefined' || index < 0) {
             children.push(child.data);