Prevent another crash if minetest crashes during startup

autocrafter.lua

@@ -66,11 +66,8 @@ local function run_autocrafter(pos, elapsed)
 	local inventory = meta:get_inventory()
 	local craft = get_craft(pos, inventory)
 	local output_item = craft.output.item
-	-- NALC: existence de limitgroup ?
-	local limitcraft = minetest.get_item_group(output_item:get_name(), "limitcraft") or 0
 	-- only use crafts that have an actual result
-	-- NALC: ou si l'item n'est pas dans le group limitcraft
-	if output_item:is_empty() or limitcraft > 0 then
+	if output_item:is_empty() then
 		meta:set_string("infotext", "unconfigured Autocrafter: unknown recipe")
 		return false
 	end

luaentity.lua

@@ -46,6 +46,11 @@ local function read_entities()
 end
 
 local function write_entities()
+	if not luaentity.entities then
+		-- This can happen if crashing on startup, causing another error that
+		-- masks the original one. Return gracefully in that case instead.
+		return
+	end
 	for _, entity in pairs(luaentity.entities) do
 		setmetatable(entity, nil)
 		for _, attached in pairs(entity._attached_entities) do