gistfile1.lua

-- basic empty tank

minetest.register_node("tanks:level_0", {
	description = "Tank",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tankgaugetop.png", "tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})


-- tank crafting

minetest.register_craft({
	output = 'tanks:level_0',
	recipe = {
		{'deco:glass', '', 'deco:glass'},
		{'deco:glass', '', 'deco:glass'},
		{'deco:glass', '', 'deco:glass'},
	}
})

-- water tanks

minetest.register_node("tanks:w_level_1", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_1.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_2", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_2.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_3", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_3.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_4", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_4.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_5", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_5.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_6", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_6.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_7", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_7.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:w_level_8", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_water_level_8.png^tankgaugetop.png", "tank_water_level_8.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

-- lava tanks

minetest.register_node("tanks:l_level_1", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_1.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_2", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_2.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_3", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_3.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_4", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_4.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_5", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_5.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_6", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_6.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_7", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_7.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:l_level_8", {
	description = "Impossible Node ;)",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_lava_level_8.png^tankgaugetop.png", "tank_lava_level_8.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

-- oil tanks

minetest.register_node("tanks:o_level_1", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_2.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_2", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_1.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_3", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_3.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_4", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_4.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_5", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_5.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_6", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_6.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_7", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_7.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

minetest.register_node("tanks:o_level_8", {
	description = "Impossible node - good try",
	drawtype = "glasslike",
	tiles = {"tankgaugetop.png", "tank_oil_level_8.png^tankgaugetop.png", "tank_oil_level_8.png^tankgauge.png"},
	groups = {oddly_breakable_by_hand=1},
})

-- black magic here

minetest.register_on_punchnode(function(pos, node, puncher)
	if not puncher then return end
	tnodename = minetest.get_node(pos)
	bname = puncher:get_wielded_item():get_name()
	if tnodename.name == "tanks:level_0" then
		if bname == "bucket:oil" then -- this line causes the bug in question
			puncher:set_wielded_item("bucket:bucket_empty 1")
			minetest.set_node(pos, "tanks:o_level_1")
		elseif bname == "bucket:bucket_lava" then
			puncher:set_wielded_item("bucket:bucket_empty 1")
			minetest.set_node(pos, "tanks:l_level_1")
		elseif bname == "bucket:bucket_lava" then
			puncher:set_wielded_item("bucket:bucket_empty 1")
			minetest.set_node(pos, "tanks:w_level_1")
		else
			return
		end
	end
end)