From f9ee0733cf7515357f16a0e6bf423210bafcd9d9 Mon Sep 17 00:00:00 2001
From: hjm <63528605@qq.com>
Date: Tue, 17 Sep 2019 16:14:11 +0800
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---
 public/react/src/modules/courses/exercise/new/SingleEditor.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/public/react/src/modules/courses/exercise/new/SingleEditor.js b/public/react/src/modules/courses/exercise/new/SingleEditor.js
index b3c2842f5..1e2005360 100644
--- a/public/react/src/modules/courses/exercise/new/SingleEditor.js
+++ b/public/react/src/modules/courses/exercise/new/SingleEditor.js
@@ -182,6 +182,10 @@ class SingleEditor extends Component{
     this.setState({ standard_answers })
   }
   onOptionContentChange = (value, index) => {
+    if (index >= this.state.question_choices.length) {
+      // TODO 新建，然后删除CD选项，再输入题干，会调用到这里，且index是3
+      return;
+    }
     let question_choices  = this.state.question_choices.slice(0);    
     question_choices[index] = value;
     this.setState({ question_choices })