From 82d953bbc219d02edd0cba6bde6ac44a591c96bf Mon Sep 17 00:00:00 2001
From: Monster Iestyn <iestynjealous@ntlworld.com>
Date: Wed, 4 Jul 2018 20:15:36 +0100
Subject: [PATCH] Fixed the Lua crash exploit.

---
 src/lua_consolelib.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lua_consolelib.c b/src/lua_consolelib.c
index 566e73748..3239b7c5e 100644
--- a/src/lua_consolelib.c
+++ b/src/lua_consolelib.c
@@ -77,7 +77,9 @@ void Got_Luacmd(UINT8 **cp, INT32 playernum)
 
 deny:
 	//must be hacked/buggy client
-	lua_settop(gL, 0); // clear stack
+	if (gL) // check if Lua is actually turned on first, you dummmy -- Monster Iestyn 04/07/18
+		lua_settop(gL, 0); // clear stack
+
 	CONS_Alert(CONS_WARNING, M_GetText("Illegal lua command received from %s\n"), player_names[playernum]);
 	if (server)
 	{