diff --git a/worldedit/primitives.lua b/worldedit/primitives.lua
index 0a7d175..0a73f7f 100644
--- a/worldedit/primitives.lua
+++ b/worldedit/primitives.lua
@@ -278,7 +278,7 @@ function worldedit.spiral(pos, length, height, spacer, node_name)
 	-- Add first column
 	local count = height
 	local column = i
-	for y = 1, height do
+	for _ = 1, height do
 		data[column] = node_id
 		column = column + stride.y
 	end
@@ -296,12 +296,12 @@ function worldedit.spiral(pos, length, height, spacer, node_name)
 			segment_length = segment_length + spacer
 		end
 		-- Fill segment
-		for index = 1, segment_length do
+		for _ = 1, segment_length do
 			-- Move along the direction of the segment
 			i = i + stride_axis * sign
 			local column = i
 			-- Add column
-			for y = 1, height do
+			for _ = 1, height do
 				data[column] = node_id
 				column = column + stride.y
 			end
@@ -312,11 +312,11 @@ function worldedit.spiral(pos, length, height, spacer, node_name)
 
 	-- Add shorter final segment
 	sign = -sign
-	for index = 1, segment_length do
+	for _ = 1, segment_length do
 		i = i + stride_axis * sign
 		local column = i
 		-- Add column
-		for y = 1, height do
+		for _ = 1, height do
 			data[column] = node_id
 			column = column + stride.y
 		end
diff --git a/worldedit/serialization.lua b/worldedit/serialization.lua
index c3793b2..02ef44e 100644
--- a/worldedit/serialization.lua
+++ b/worldedit/serialization.lua
@@ -165,7 +165,7 @@ local function load_schematic(value)
 		nodes = tables[1]
 
 		if version == 1 then --original flat table format
-			for i, entry in ipairs(nodes) do
+			for _, entry in ipairs(nodes) do
 				local pos = entry[1]
 				entry.x, entry.y, entry.z = pos.x, pos.y, pos.z
 				entry[1] = nil
@@ -214,7 +214,7 @@ function worldedit.allocate_with_nodes(origin_pos, nodes)
 	local pos1x, pos1y, pos1z = huge, huge, huge
 	local pos2x, pos2y, pos2z = -huge, -huge, -huge
 	local origin_x, origin_y, origin_z = origin_pos.x, origin_pos.y, origin_pos.z
-	for i, entry in ipairs(nodes) do
+	for _, entry in ipairs(nodes) do
 		local x, y, z = origin_x + entry.x, origin_y + entry.y, origin_z + entry.z
 		if x < pos1x then pos1x = x end
 		if y < pos1y then pos1y = y end
@@ -242,7 +242,7 @@ function worldedit.deserialize(origin_pos, value)
 	local origin_x, origin_y, origin_z = origin_pos.x, origin_pos.y, origin_pos.z
 	local count = 0
 	local add_node, get_meta = minetest.add_node, minetest.get_meta
-	for i, entry in ipairs(nodes) do
+	for _, entry in ipairs(nodes) do
 		entry.x, entry.y, entry.z = origin_x + entry.x, origin_y + entry.y, origin_z + entry.z
 		-- Entry acts as both position and node
 		add_node(entry, entry)
diff --git a/worldedit_brush/init.lua b/worldedit_brush/init.lua
index 78c1bd1..2637844 100644
--- a/worldedit_brush/init.lua
+++ b/worldedit_brush/init.lua
@@ -65,7 +65,7 @@ minetest.register_tool(":worldedit:brush", {
 	inventory_image = "worldedit_brush.png",
 	stack_max = 1, -- no need to stack these (metadata prevents this anyway)
 	range = 0,
-	on_use = function(itemstack, placer, pointed_thing)
+	on_use = function(itemstack, placer)
 		brush_on_use(itemstack, placer)
 		return itemstack -- nothing consumed, nothing changed
 	end,
diff --git a/worldedit_commands/cuboid.lua b/worldedit_commands/cuboid.lua
index 93e45fa..eb3f327 100644
--- a/worldedit_commands/cuboid.lua
+++ b/worldedit_commands/cuboid.lua
@@ -239,7 +239,7 @@ worldedit.register_command("cubeapply", {
 		end
 		return true, sidex, sidey, sidez, cmd, parsed
 	end,
-	nodes_needed = function(name, sidex, sidey, sidez, cmd, parsed)
+	nodes_needed = function(_, sidex, sidey, sidez)
 		-- its not possible to defer to the target command at this point
 		return sidex * sidey * sidez
 	end,
diff --git a/worldedit_commands/init.lua b/worldedit_commands/init.lua
index 1cdb107..61103dd 100644
--- a/worldedit_commands/init.lua
+++ b/worldedit_commands/init.lua
@@ -88,7 +88,7 @@ function worldedit.register_command(name, def)
 	def.require_pos = def.require_pos or 0
 	assert(def.require_pos >= 0 and def.require_pos < 3)
 	if def.params == "" and not def.parse then
-		def.parse = function(param) return true end
+		def.parse = function() return true end
 	else
 		assert(def.parse)
 	end
@@ -470,7 +470,7 @@ worldedit.register_command("fixedpos", {
 	end,
 })
 
-minetest.register_on_punchnode(function(pos, node, puncher)
+minetest.register_on_punchnode(function(pos, _, puncher)
 	local name = puncher:get_player_name()
 	if name ~= "" and worldedit.set_pos[name] ~= nil then --currently setting position
 		if worldedit.set_pos[name] == "pos1" then --setting position 1
@@ -579,7 +579,7 @@ worldedit.register_command("mix", {
 		for nodename in param:gmatch("[^%s]+") do
 			if tonumber(nodename) ~= nil and #nodes > 0 then
 				local last_node = nodes[#nodes]
-				for i = 1, tonumber(nodename) do
+				for _ = 1, tonumber(nodename) do
 					nodes[#nodes + 1] = last_node
 				end
 			else
@@ -665,7 +665,7 @@ worldedit.register_command("hollowcube", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_cube,
-	nodes_needed = function(name, w, h, l, node)
+	nodes_needed = function(_, w, h, l)
 		return w * h * l
 	end,
 	func = function(name, w, h, l, node)
@@ -680,7 +680,7 @@ worldedit.register_command("cube", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_cube,
-	nodes_needed = function(name, w, h, l, node)
+	nodes_needed = function(_, w, h, l)
 		return w * h * l
 	end,
 	func = function(name, w, h, l, node)
@@ -707,7 +707,7 @@ worldedit.register_command("hollowsphere", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_sphere,
-	nodes_needed = function(name, radius, node)
+	nodes_needed = function(_, radius)
 		return math.ceil((4 * math.pi * (radius ^ 3)) / 3) --volume of sphere
 	end,
 	func = function(name, radius, node)
@@ -722,7 +722,7 @@ worldedit.register_command("sphere", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_sphere,
-	nodes_needed = function(name, radius, node)
+	nodes_needed = function(_, radius)
 		return math.ceil((4 * math.pi * (radius ^ 3)) / 3) --volume of sphere
 	end,
 	func = function(name, radius, node)
@@ -749,7 +749,7 @@ worldedit.register_command("hollowdome", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_dome,
-	nodes_needed = function(name, radius, node)
+	nodes_needed = function(_, radius)
 		return math.ceil((2 * math.pi * (radius ^ 3)) / 3) --volume of dome
 	end,
 	func = function(name, radius, node)
@@ -764,7 +764,7 @@ worldedit.register_command("dome", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_dome,
-	nodes_needed = function(name, radius, node)
+	nodes_needed = function(_, radius)
 		return math.ceil((2 * math.pi * (radius ^ 3)) / 3) --volume of dome
 	end,
 	func = function(name, radius, node)
@@ -797,7 +797,7 @@ worldedit.register_command("hollowcylinder", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_cylinder,
-	nodes_needed = function(name, axis, length, radius1, radius2, node)
+	nodes_needed = function(_, _, length, radius1, radius2)
 		local radius = math.max(radius1, radius2)
 		return math.ceil(math.pi * (radius ^ 2) * length)
 	end,
@@ -818,7 +818,7 @@ worldedit.register_command("cylinder", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_cylinder,
-	nodes_needed = function(name, axis, length, radius1, radius2, node)
+	nodes_needed = function(_, _, length, radius1, radius2)
 		local radius = math.max(radius1, radius2)
 		return math.ceil(math.pi * (radius ^ 2) * length)
 	end,
@@ -851,7 +851,7 @@ worldedit.register_command("hollowpyramid", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_pyramid,
-	nodes_needed = function(name, axis, height, node)
+	nodes_needed = function(_, _, height)
 		return math.ceil(((height * 2 + 1) ^ 2) * height / 3)
 	end,
 	func = function(name, axis, height, node)
@@ -871,7 +871,7 @@ worldedit.register_command("pyramid", {
 	privs = {worldedit=true},
 	require_pos = 1,
 	parse = check_pyramid,
-	nodes_needed = function(name, axis, height, node)
+	nodes_needed = function(_, _, height)
 		return math.ceil(((height * 2 + 1) ^ 2) * height / 3)
 	end,
 	func = function(name, axis, height, node)
@@ -901,7 +901,7 @@ worldedit.register_command("spiral", {
 		end
 		return true, tonumber(length), tonumber(height), tonumber(space), node
 	end,
-	nodes_needed = function(name, length, height, space, node)
+	nodes_needed = function(_, length, height, space)
 		return (length + space) * height -- TODO: this is not the upper bound
 	end,
 	func = function(name, length, height, space, node)
@@ -922,7 +922,7 @@ worldedit.register_command("copy", {
 		end
 		return true, axis, tonumber(amount)
 	end,
-	nodes_needed = function(name, axis, amount)
+	nodes_needed = function(name)
 		return check_region(name) * 2
 	end,
 	func = function(name, axis, amount)
@@ -949,7 +949,7 @@ worldedit.register_command("move", {
 		end
 		return true, axis, tonumber(amount)
 	end,
-	nodes_needed = function(name, axis, amount)
+	nodes_needed = function(name)
 		return check_region(name) * 2
 	end,
 	func = function(name, axis, amount)
@@ -981,7 +981,7 @@ worldedit.register_command("stack", {
 		end
 		return true, axis, tonumber(repetitions)
 	end,
-	nodes_needed = function(name, axis, repetitions)
+	nodes_needed = function(name, _, repetitions)
 		return check_region(name) * math.abs(repetitions)
 	end,
 	func = function(name, axis, repetitions)
@@ -1016,7 +1016,7 @@ worldedit.register_command("stack2", {
 
 		return true, tonumber(repetitions), {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
 	end,
-	nodes_needed = function(name, repetitions, offset)
+	nodes_needed = function(name, repetitions)
 		return check_region(name) * repetitions
 	end,
 	func = function(name, repetitions, offset)
@@ -1480,7 +1480,7 @@ worldedit.register_command("load", {
 			minetest.get_worldpath() .. "/schems/" .. param .. ".wem",
 		}
 		local file, err
-		for index, path in ipairs(testpaths) do
+		for _, path in ipairs(testpaths) do
 			file, err = io.open(path, "rb")
 			if not err then
 				break
@@ -1633,7 +1633,7 @@ worldedit.register_command("mtschemprob", {
 			if problist == nil then
 				return
 			end
-			for k,v in pairs(problist) do
+			for _,v in pairs(problist) do
 				local prob = math.floor(((v.prob / 256) * 100) * 100 + 0.5) / 100
 				text = text .. minetest.pos_to_string(v.pos) .. ": " .. prob .. "% | "
 			end
diff --git a/worldedit_commands/mark.lua b/worldedit_commands/mark.lua
index a195280..d43e8fc 100644
--- a/worldedit_commands/mark.lua
+++ b/worldedit_commands/mark.lua
@@ -134,17 +134,17 @@ minetest.register_entity(":worldedit:pos1", {
 		physical = false,
 		static_save = false,
 	},
-	on_activate = function(self, staticdata, dtime_s)
+	on_activate = function(self, staticdata)
 		if staticdata ~= init_sentinel then
 			-- we were loaded from before static_save = false was added
 			self.object:remove()
 		end
 	end,
-	on_punch = function(self, hitter)
+	on_punch = function(self)
 		self.object:remove()
 		worldedit.marker1[self.player_name] = nil
 	end,
-	on_blast = function(self, damage)
+	on_blast = function()
 		return false, false, {} -- don't damage or knockback
 	end,
 })
@@ -160,17 +160,17 @@ minetest.register_entity(":worldedit:pos2", {
 		physical = false,
 		static_save = false,
 	},
-	on_activate = function(self, staticdata, dtime_s)
+	on_activate = function(self, staticdata)
 		if staticdata ~= init_sentinel then
 			-- we were loaded from before static_save = false was added
 			self.object:remove()
 		end
 	end,
-	on_punch = function(self, hitter)
+	on_punch = function(self)
 		self.object:remove()
 		worldedit.marker2[self.player_name] = nil
 	end,
-	on_blast = function(self, damage)
+	on_blast = function()
 		return false, false, {} -- don't damage or knockback
 	end,
 })
@@ -183,13 +183,13 @@ minetest.register_entity(":worldedit:region_cube", {
 		physical = false,
 		static_save = false,
 	},
-	on_activate = function(self, staticdata, dtime_s)
+	on_activate = function(self, staticdata)
 		if staticdata ~= init_sentinel then
 			-- we were loaded from before static_save = false was added
 			self.object:remove()
 		end
 	end,
-	on_punch = function(self, hitter)
+	on_punch = function(self)
 		local markers = worldedit.marker_region[self.player_name]
 		if not markers then
 			return
@@ -199,7 +199,7 @@ minetest.register_entity(":worldedit:region_cube", {
 		end
 		worldedit.marker_region[self.player_name] = nil
 	end,
-	on_blast = function(self, damage)
+	on_blast = function()
 		return false, false, {} -- don't damage or knockback
 	end,
 })
diff --git a/worldedit_commands/wand.lua b/worldedit_commands/wand.lua
index faa77ff..37b9f31 100644
--- a/worldedit_commands/wand.lua
+++ b/worldedit_commands/wand.lua
@@ -14,7 +14,7 @@ minetest.register_tool(":worldedit:wand", {
 	stack_max = 1, -- there is no need to have more than one
 	liquids_pointable = true, -- ground with only water on can be selected as well
 
-	on_use = function(itemstack, placer, pointed_thing)
+	on_use = function(_, placer, pointed_thing)
 		if placer == nil or pointed_thing == nil then return end
 		local name = placer:get_player_name()
 		if pointed_thing.type == "node" then
diff --git a/worldedit_gui/functionality.lua b/worldedit_gui/functionality.lua
index 2efbf9a..84016e2 100644
--- a/worldedit_gui/functionality.lua
+++ b/worldedit_gui/functionality.lua
@@ -39,7 +39,7 @@ setmetatable(angle_values, {__index = function () return 90 end})
 -- given multiple sets of privileges, produces a single set of privs that would have the same effect as requiring all of them at the same time
 local combine_privs = function(...)
 	local result = {}
-	for i, privs in ipairs({...}) do
+	for _, privs in ipairs({...}) do
 		for name, value in pairs(privs) do
 			if result[name] ~= nil and result[name] ~= value then --the priv must be both true and false, which can never happen
 				return {__fake_priv_that_nobody_has__=true} --privilege table that can never be satisfied
diff --git a/worldedit_gui/init.lua b/worldedit_gui/init.lua
index 08ecc1b..3aab382 100644
--- a/worldedit_gui/init.lua
+++ b/worldedit_gui/init.lua
@@ -41,7 +41,7 @@ Example:
 
 worldedit.register_gui_handler = function(identifier, handler)
 	local enabled = true
-	minetest.register_on_player_receive_fields(function(player, formname, fields)
+	minetest.register_on_player_receive_fields(function(player, _, fields)
 		if not enabled then return false end
 		enabled = false
 		minetest.after(0.2, function() enabled = true end)
@@ -85,7 +85,7 @@ if minetest.global_exists("unified_inventory") then -- unified inventory install
 		end,
 	})
 
-	minetest.register_on_player_receive_fields(function(player, formname, fields)
+	minetest.register_on_player_receive_fields(function(player, _, fields)
 		local name = player:get_player_name()
 		if fields.worldedit_gui then --main page
 			worldedit.show_page(name, "worldedit_gui")
@@ -116,7 +116,7 @@ elseif minetest.global_exists("inventory_plus") then -- inventory++ installed
 
 	--show the form when the button is pressed and hide it when done
 	local gui_player_formspecs = {}
-	minetest.register_on_player_receive_fields(function(player, formname, fields)
+	minetest.register_on_player_receive_fields(function(player, _, fields)
 		local name = player:get_player_name()
 		if fields.worldedit_gui then --main page
 			gui_player_formspecs[name] = player:get_inventory_formspec()
@@ -158,7 +158,7 @@ elseif minetest.global_exists("smart_inventory") then -- smart_inventory install
 		codebox:set_we_formspec("worldedit_gui")
 
 		-- process input (the back button)
-		state:onInput(function(state, fields, player)
+		state:onInput(function(state, fields)
 			if fields.worldedit_gui then --main page
 				state:get("code"):set_we_formspec("worldedit_gui")
 			elseif fields.worldedit_gui_exit then --return to original page
@@ -198,7 +198,7 @@ elseif minetest.global_exists("sfinv") then -- sfinv installed
 	})
 
 	--show the form when the button is pressed and hide it when done
-	minetest.register_on_player_receive_fields(function(player, formname, fields)
+	minetest.register_on_player_receive_fields(function(player, _, fields)
 		if fields.worldedit_gui then --main page
 			worldedit.show_page(player:get_player_name(), "worldedit_gui")
 			return true
@@ -228,12 +228,12 @@ end
 worldedit.register_gui_function("worldedit_gui", {
 	name = "WorldEdit GUI",
 	privs = {interact=true},
-	get_formspec = function(name)
+	get_formspec = function()
 		--create a form with all the buttons arranged in a grid
 		local buttons, x, y, index = {}, 0, 1, 0
 		local width, height = 3, 0.8
 		local columns = 5
-		for i, identifier in pairs(identifiers) do
+		for _, identifier in pairs(identifiers) do
 			if identifier ~= "worldedit_gui" then
 				local entry = worldedit.pages[identifier]
 				table.insert(buttons, string.format((entry.get_formspec and "button" or "button_exit") ..