From 5b93a9bf8432cbd30c43a6e1d12c6b5b7da9c4f8 Mon Sep 17 00:00:00 2001
From: jp <jeanpatrick.guerrero@gmail.com>
Date: Mon, 7 Dec 2015 14:18:05 +0100
Subject: [PATCH] Craft guide : prevent crash when filter is not alphanumerical
 - thanks @kaeza

---
 worktable.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/worktable.lua b/worktable.lua
index 6f5b448..6b249d1 100644
--- a/worktable.lua
+++ b/worktable.lua
@@ -180,7 +180,7 @@ function worktable.craftguide_update(pos, filter)
 		if not (def.groups.not_in_creative_inventory == 1) and
 				minetest.get_craft_recipe(name).items and
 				def.description and def.description ~= "" then
-			if (filter and def.name:find(filter)) or not filter then
+			if (filter and def.name:find(filter, 1, true)) or not filter then
 				inv_items_list[#inv_items_list+1] = name
 			end
 		end