From dbd8903a538e7b87061795ce27ec5c72c26743af Mon Sep 17 00:00:00 2001
From: James R <justsomejames2@gmail.com>
Date: Thu, 10 Dec 2020 08:50:23 -0800
Subject: [PATCH] Use ref for pushing error handler

---
 src/lua_hooklib.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/lua_hooklib.c b/src/lua_hooklib.c
index 02c427979..1ac9a6952 100644
--- a/src/lua_hooklib.c
+++ b/src/lua_hooklib.c
@@ -74,6 +74,8 @@ static int * hookRefs;
 // After a hook errors once, don't print the error again.
 static UINT8 * hooksErrored;
 
+static int errorRef;
+
 static boolean mobj_hook_available(int hook_type, mobjtype_t mobj_type)
 {
 	return
@@ -231,7 +233,11 @@ static int lib_addHook(lua_State *L)
 
 int LUA_HookLib(lua_State *L)
 {
+	lua_pushcfunction(L, LUA_GetErrorMessage);
+	errorRef = luaL_ref(L, LUA_REGISTRYINDEX);
+
 	lua_register(L, "addHook", lib_addHook);
+
 	return 0;
 }
 
@@ -258,7 +264,7 @@ enum {
 
 static void push_error_handler(void)
 {
-	lua_pushcfunction(gL, LUA_GetErrorMessage);
+	lua_getref(gL, errorRef);
 }
 
 /* repush hook string */