From e3093cbe857cca99b8f090922d6553bae90c3bf8 Mon Sep 17 00:00:00 2001
From: Wuzzy <wuzzy2@mail.ru>
Date: Fri, 8 Sep 2017 18:39:02 +0200
Subject: [PATCH] Prevent /spawnentity from spawning unknown entity (#6388)

---
 builtin/game/chatcommands.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/builtin/game/chatcommands.lua b/builtin/game/chatcommands.lua
index 05b814d6f..81cb76eaf 100644
--- a/builtin/game/chatcommands.lua
+++ b/builtin/game/chatcommands.lua
@@ -629,6 +629,9 @@ core.register_chatcommand("spawnentity", {
 			core.log("error", "Unable to spawn entity, player is nil")
 			return false, "Unable to spawn entity, player is nil"
 		end
+		if not minetest.registered_entities[entityname] then
+			return false, "Cannot spawn an unknown entity"
+		end
 		if p == "" then
 			p = player:getpos()
 		else