From 773fb5bd6f9ef512d61b87fb13cd88ffc0af3581 Mon Sep 17 00:00:00 2001
From: LoganDark <logandarklock@gmail.com>
Date: Mon, 8 Nov 2021 15:30:51 -0800
Subject: [PATCH] Don't allow registry to be set to readonly (#184)

---
 VM/src/lapi.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/VM/src/lapi.cpp b/VM/src/lapi.cpp
index f2e97c66..c0c78b93 100644
--- a/VM/src/lapi.cpp
+++ b/VM/src/lapi.cpp
@@ -703,6 +703,7 @@ void lua_setreadonly(lua_State* L, int objindex, bool value)
     const TValue* o = index2adr(L, objindex);
     api_check(L, ttistable(o));
     Table* t = hvalue(o);
+    api_check(L, t != hvalue(registry(L)));
     t->readonly = value;
     return;
 }