fix

builtin/game/item_entity.lua

@@ -211,14 +211,17 @@ core.register_entity(":__builtin:item", {
 				self.object:set_properties({physical = true})
 			end
 		end
-
+		
+		local node = minetest.get_node_or_nil(self.object:get_pos())
+		if not node then
+			return
+		end
 		if minetest.get_item_group(node.name, "lava") > 0 then
 			minetest.sound_play("default_cool_lava", {
 				pos = self.object:get_pos(),
 				max_hear_distance = 8,
 			})
 			self.object:remove()
-			return
 			minetest.add_particlespawner({
 				amount = 3,
 				time = 0.1,
@@ -235,6 +238,7 @@ core.register_entity(":__builtin:item", {
 				collisiondetection = true,
 				texture = "item_smoke.png"
 			})
+		return
 		end
 	end,
 

games/default/files/default/crafting.lua

@@ -751,4 +751,9 @@ minetest.register_craft({
         {"farming:string", "farming:string", "farming:string"},
         {"farming:string", "farming:string", "farming:string"},
     }
-})
+})
+
+minetest.register_craftitem("default:flint", {
+	description = "Flint",
+	inventory_image = "default_flint.png"
+})

games/default/files/default/functions.lua

@@ -555,7 +555,7 @@ minetest.register_abm({
 --
 -- Snowballs
 --
-
+--[[
 -- Shoot snowball
 snow_shoot_snowball = function (item, player, pointed_thing)
 	local playerpos = player:get_pos()
@@ -576,8 +576,7 @@ snowball_ENTITY = {
 }
 
 -- Called when snowball is moving.
-snowball_ENTITY.on_step = function(self, dtime)
-	self.timer = self.timer+dtime
+snowball_ENTITY.on_step = function(self)
 	local pos = self.object:getpos()
 	local node = minetest.get_node(pos)
 
@@ -592,4 +591,4 @@ snowball_ENTITY.on_step = function(self, dtime)
 	self.lastpos = {x = pos.x, y = pos.y, z = pos.z}
 end
 
-minetest.register_entity("default:snowball_entity", snowball_ENTITY)
+minetest.register_entity("default:snowball_entity", snowball_entity)]]--