Patch-Source: https://gitlab.gnome.org/GNOME/gtk/-/commit/6dc75b46cc9afe1c98b7ba72a9b1a275c723ea42
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From 6dc75b46cc9afe1c98b7ba72a9b1a275c723ea42 Mon Sep 17 00:00:00 2001
From: liiulinsong <liulinsong@kylinos.cn>
Date: Fri, 26 May 2023 10:18:58 +0800
Subject: [PATCH] Make sure that the charcode is signless

1. The data with type of char is signed by default.

2. The byte value of UTF-8 is signless by default.

3. So, if a UTF-8 charcode is stored in a char array, we should cast the
type of its value from char to unsigned char.
---
 gtk/gtkcssparser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gtk/gtkcssparser.c b/gtk/gtkcssparser.c
index 44ff7bcfca7..fc8ede28b88 100644
--- a/gtk/gtkcssparser.c
+++ b/gtk/gtkcssparser.c
@@ -373,7 +373,7 @@ _gtk_css_parser_read_char (GtkCssParser *parser,
       parser->data++;
       return TRUE;
     }
-  if (*parser->data >= 127)
+  if ((*(guchar *) parser->data) >= 127)
     {
       gsize len = g_utf8_skip[(guint) *(guchar *) parser->data];
 
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