From db78e3dcdbdedcb7bacc4513ae8244c139ae839c Mon Sep 17 00:00:00 2001
From: flux <swvksngt@sixths.net>
Date: Sat, 6 Jul 2019 02:17:06 +0000
Subject: [PATCH] add check to prevent bad unicode from crashing the server

---
 init.lua | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/init.lua b/init.lua
index 8760a11..d5309d8 100644
--- a/init.lua
+++ b/init.lua
@@ -128,7 +128,12 @@ local make_iso = function(s)
 	local s2 = ""
 	while i <= string.len(s) do
 		if string.byte(s,i) > 159 then
-			s2 = s2..string.char(get_iso(string.sub(s, i, i+1)))
+			local ciso = get_iso(string.sub(s, i, i+1))
+			if ciso >= 0 and ciso < 256 then
+				s2 = s2..string.char(ciso)
+			else
+				s2 = s2..string.char(127)
+			end
 			i = i + 2
 		else
 			s2 = s2..string.sub(s, i, i)