From 5113dc407a99bec1caa7329979db91ac49108c04 Mon Sep 17 00:00:00 2001
From: JP Guerrero <jeanpatrick.guerrero@gmail.com>
Date: Tue, 13 Dec 2016 22:44:40 +0100
Subject: [PATCH] Fix nil crash when recipe item is unknown

---
 init.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/init.lua b/init.lua
index 12a58fc..56bae65 100644
--- a/init.lua
+++ b/init.lua
@@ -46,7 +46,10 @@ function craftguide:get_tooltip(item, recipe_type, cooktime, groups)
 	local fueltime = minetest.get_craft_result({
 		method="fuel", width=1, items={item}}).time
 	local has_extras = groups or recipe_type == "cooking" or fueltime > 0
-	local item_desc = groups and "" or minetest.registered_items[item].description
+	local item_desc = ""
+	if minetest.registered_items[item] and not groups then
+		item_desc = minetest.registered_items[item].description
+	end
 
 	if groups then
 		local groupstr = "Any item belonging to the "