From f3a7d966d28a486e9d8bec4d0156ad634463ccbe Mon Sep 17 00:00:00 2001
From: jacob1 <jfu614@gmail.com>
Date: Thu, 13 Jul 2017 20:55:03 -0400
Subject: [PATCH] potential fix in sim.partCreate, also

---
 src/lua/LuaScriptInterface.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index 6c8d48cd29..90c5e3e591 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -898,7 +898,12 @@ int LuaScriptInterface::simulation_partChangeType(lua_State * l)
 int LuaScriptInterface::simulation_partCreate(lua_State * l)
 {
 	int newID = lua_tointeger(l, 1);
-	if(newID >= NPART || newID < -3)
+	if (newID >= NPART || newID < -3)
+	{
+		lua_pushinteger(l, -1);
+		return 1;
+	}
+	if (newID >= 0 && !luacon_sim->parts[newID].type)
 	{
 		lua_pushinteger(l, -1);
 		return 1;