From f8e401feb091bb9dee4ddd6eeb1ec46768eee89f Mon Sep 17 00:00:00 2001
From: Charles Dang <exodia339@gmail.com>
Date: Mon, 9 Oct 2017 13:16:50 +1100
Subject: [PATCH] Apply Lua.org patch

Lua does not check GC when creating error messages.

reported by Viacheslav Usov on 06 Jul 2017. existed since 5.3.2.

Example:
    See https://www.lua.org/bugs.html#5.3.4-4.
---
 src/lua/ldebug.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lua/ldebug.cpp b/src/lua/ldebug.cpp
index 239affb76c528..60d2b6f47f719 100644
--- a/src/lua/ldebug.cpp
+++ b/src/lua/ldebug.cpp
@@ -653,6 +653,7 @@ l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
   CallInfo *ci = L->ci;
   const char *msg;
   va_list argp;
+  luaC_checkGC(L);  /* error message uses memory */
   va_start(argp, fmt);
   msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
   va_end(argp);