From d622250c3e378484b572c26b2b1db98bfc8c4c9b Mon Sep 17 00:00:00 2001
From: dota17 <50514813+dota17@users.noreply.github.com>
Date: Tue, 17 Sep 2019 01:40:09 +0800
Subject: [PATCH] Check the comments array boundry. (#993)

* check the comments array boundry

* remove empty line
---
 src/lib_json/json_value.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index 771c0dc..730794d 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -1450,7 +1450,10 @@ void Value::Comments::set(CommentPlacement slot, String comment) {
   if (!ptr_) {
     ptr_ = std::unique_ptr<Array>(new Array());
   }
-  (*ptr_)[slot] = std::move(comment);
+  // check comments array boundry.
+  if (slot < CommentPlacement::numberOfCommentPlacement) {
+    (*ptr_)[slot] = std::move(comment);
+  }
 }
 
 void Value::setComment(String comment, CommentPlacement placement) {