From cf0e49fb4aee91085011b0eb6cbb9e15c0d4614c Mon Sep 17 00:00:00 2001
From: SmallJoker <SmallJoker@users.noreply.github.com>
Date: Thu, 18 Oct 2018 06:45:35 +0200
Subject: [PATCH] Chests: Fix crash on empty key metadata

---
 mods/default/chests.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mods/default/chests.lua b/mods/default/chests.lua
index cd70799..3338905 100644
--- a/mods/default/chests.lua
+++ b/mods/default/chests.lua
@@ -147,6 +147,10 @@ function default.chest.register_chest(name, d)
 			local itemstack = player:get_wielded_item()
 			local key_meta = itemstack:get_meta()
 
+			if itemstack:get_metadata() == "" then
+				return
+			end
+
 			if key_meta:get_string("secret") == "" then
 				key_meta:set_string("secret", minetest.parse_json(itemstack:get_metadata()).secret)
 				itemstack:set_metadata("")