From dcdc66b8f5a2e8e75d6fce2676fdd98d5af4db49 Mon Sep 17 00:00:00 2001
From: Benau <Benau@users.noreply.github.com>
Date: Fri, 25 Feb 2022 11:13:27 +0800
Subject: [PATCH] Fix undefined behavior in C++20, see #4735

---
 src/utils/string_utils.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/utils/string_utils.cpp b/src/utils/string_utils.cpp
index f8f8b8bd8..e96382700 100644
--- a/src/utils/string_utils.cpp
+++ b/src/utils/string_utils.cpp
@@ -832,7 +832,8 @@ namespace StringUtils
             if (utf32[i] >= 128 || utf32[i] == '&' || utf32[i] == '<' ||
                 utf32[i] == '>' || utf32[i] == '\"' || utf32[i] == ' ')
             {
-                output << "&#x" << std::hex << std::uppercase << utf32[i] << ";";
+                unsigned code = (unsigned)utf32[i];
+                output << "&#x" << std::hex << std::uppercase << code << ";";
             }
             else
             {