From f1a4029743ca095025e852b3859212508c9de74e Mon Sep 17 00:00:00 2001
From: Philippe Verdy <1387035+verdy-p@users.noreply.github.com>
Date: Sat, 13 Jun 2020 04:25:23 +0200
Subject: [PATCH] fix invalid codePoint=0x110000 in icu_utf8_char()

---
 src/icu.utf8.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/icu.utf8.c b/src/icu.utf8.c
index 40a2ebd..8f64ce9 100644
--- a/src/icu.utf8.c
+++ b/src/icu.utf8.c
@@ -365,10 +365,7 @@ static int icu_utf8_char(lua_State *L) {
             luaL_addchar(&buf, (char)(0x80 | ((codePoint >> 6) & 0x3F)));
             luaL_addchar(&buf, (char)(0x80 | (codePoint & 0x3F)));
         }
-        else if (codePoint > 0x110000) {
-            return luaL_argerror(L,i+1,"invalid codepoint");
-        }
-        else {
+        else if (codePoint < 0x110000) {
             // 00000000 000zzzzz yyyyyyyy xxxxxxxx
             // 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx
             luaL_addchar(&buf, (char)(0xF0 | (codePoint >> 18)));
@@ -376,6 +373,9 @@ static int icu_utf8_char(lua_State *L) {
             luaL_addchar(&buf, (char)(0x80 | ((codePoint >> 6) & 0x3F)));
             luaL_addchar(&buf, (char)(0x80 | (codePoint & 0x3F)));
         }
+        else {
+            return luaL_argerror(L,i+1,"invalid codepoint");
+        }
     }
     luaL_pushresult(&buf);
     return 1;