Crash on enchant with some item about xdecor HOT 4 CLOSED

diff --git a/home/james/.minetest/mods/xdecor/enchanting.lua b/mods/xdecor/enchanting.lua
index a3c8e5a..3878d95 100644
--- a/home/james/.minetest/mods/xdecor/enchanting.lua
+++ b/mods/xdecor/enchanting.lua
@@ -12,11 +12,15 @@ enchanting.strength = 1.2  -- Armor strength (3d_armor only)
 enchanting.speed    = 0.2  -- Player speed (3d_armor only)
 enchanting.jump     = 0.2  -- Player jumping (3d_armor only)

+local function debug(pos, listname, stack, player, name)
+   minetest.log("action", name .. ", " .. listname .. ": " .. player:get_player_name() .. " with " ..
+       stack:get_name() .. " at " .. minetest.pos_to_string(pos))
+end
+
 function enchanting.formspec(pos, num)
    local meta = minetest.get_meta(pos)
    local formspec = [[ size[9,9;]
-           bgcolor[#080808BB;true]
-           background[0,0;9,9;ench_ui.png]
+           background[0,0;9,9;ench_ui.png;true]
            list[context;tool;0.9,2.9;1,1;]
            list[context;mese;2,2.9;1,1;]
            list[current_player;main;0.5,4.5;8,4;]
@@ -41,7 +45,8 @@ function enchanting.formspec(pos, num)
    meta:set_string("formspec", formspec)
 end

-function enchanting.on_put(pos, listname, _, stack)
+function enchanting.on_put(pos, listname, index, stack, player)
+   debug(pos, listname, stack, player, "on_put")
    if listname == "tool" then
        local stackname = stack:get_name()
        local tool_groups = {
@@ -58,7 +63,11 @@ function enchanting.on_put(pos, listname, _, stack)
    end
 end

-function enchanting.fields(pos, _, fields, sender)
+function enchanting.fields(pos, formname, fields, sender)
+   minetest.log("action", sender:get_player_name() .. " at " ..
+           minetest.pos_to_string(pos) ..
+           " sends the following fields:")
+   minetest.log("action", "\n" .. dump(fields))
    if fields.quit then return end
    local inv = minetest.get_meta(pos):get_inventory()
    local tool = inv:get_stack("tool", 1)
@@ -89,7 +98,8 @@ local function allowed(tool)
    return false
 end

-function enchanting.put(_, listname, _, stack)
+function enchanting.put(pos, listname, index, stack, player)
+   debug(pos, listname, stack, player, "put")
    local item = stack:get_name():match("[^:]+$")
    if listname == "mese" and item == "mese_crystal" then
        return stack:get_count()
@@ -99,7 +109,8 @@ function enchanting.put(_, listname, _, stack)
    return 0
 end

-function enchanting.on_take(pos, listname)
+function enchanting.on_take(pos, listname, index, stack, player)
+   debug(pos, listname, stack, player, "on_take")
    if listname == "tool" then enchanting.formspec(pos, nil) end
 end

@@ -230,6 +241,7 @@ function enchanting:register_tools(mod, def)
                    full_punch_interval = full_punch_interval, max_drop_level = max_drop_level
                }
            })
+           minetest.register_alias("xdecor:enchanted_"..tool.."_"..material.."_"..enchant, mod..":enchanted_"..tool.."_"..material.."_"..enchant)
        end

        if mod == "3d_armor" then