From 218999dff899872fb38d3c8889d5bc27cc600ed1 Mon Sep 17 00:00:00 2001
From: Francesco Abbate <francesco.bbt@gmail.com>
Date: Fri, 10 Sep 2021 14:55:04 +0200
Subject: [PATCH] Avoid bug when replacement stop at end of string

Detect when we are past the end of the string to avoid by
checking if byte is not nil.

Fix #510.
---
 data/core/regex.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/data/core/regex.lua b/data/core/regex.lua
index 19306e0..69203cb 100644
--- a/data/core/regex.lua
+++ b/data/core/regex.lua
@@ -23,7 +23,7 @@ end
 -- Moves to the end of the identified character.
 local function end_character(str, index)
   local byte = string.byte(str, index + 1)
-  while byte >= 128 and byte < 192 do
+  while byte and byte >= 128 and byte < 192 do
     index = index + 1
     byte = string.byte(str, index + 1)
   end