diff --git a/mods/beds/api.lua b/mods/beds/api.lua
index 3632dc0..9349545 100644
--- a/mods/beds/api.lua
+++ b/mods/beds/api.lua
@@ -49,7 +49,8 @@ function beds.register_bed(name, def)
 			local node = minetest.get_node(under)
 			local udef = minetest.registered_nodes[node.name]
 			if udef and udef.on_rightclick and
-					not (placer and placer:get_player_control().sneak) then
+					not (placer and placer:is_player() and
+					placer:get_player_control().sneak) then
 				return udef.on_rightclick(under, node, placer, itemstack,
 					pointed_thing) or itemstack
 			end
@@ -61,9 +62,11 @@ function beds.register_bed(name, def)
 				pos = pointed_thing.above
 			end
 
-			if minetest.is_protected(pos, placer:get_player_name()) and
-					not minetest.check_player_privs(placer, "protection_bypass") then
-				minetest.record_protection_violation(pos, placer:get_player_name())
+			local player_name = placer and placer:get_player_name() or ""
+
+			if minetest.is_protected(pos, player_name) and
+					not minetest.check_player_privs(player_name, "protection_bypass") then
+				minetest.record_protection_violation(pos, player_name)
 				return itemstack
 			end
 
@@ -72,12 +75,13 @@ function beds.register_bed(name, def)
 				return itemstack
 			end
 
-			local dir = minetest.dir_to_facedir(placer:get_look_dir())
+			local dir = placer and placer:get_look_dir() and
+				minetest.dir_to_facedir(placer:get_look_dir()) or 0
 			local botpos = vector.add(pos, minetest.facedir_to_dir(dir))
 
-			if minetest.is_protected(botpos, placer:get_player_name()) and
-					not minetest.check_player_privs(placer, "protection_bypass") then
-				minetest.record_protection_violation(botpos, placer:get_player_name())
+			if minetest.is_protected(botpos, player_name) and
+					not minetest.check_player_privs(player_name, "protection_bypass") then
+				minetest.record_protection_violation(botpos, player_name)
 				return itemstack
 			end
 
@@ -90,7 +94,7 @@ function beds.register_bed(name, def)
 			minetest.set_node(botpos, {name = name .. "_top", param2 = dir})
 
 			if not (creative and creative.is_enabled_for
-					and creative.is_enabled_for(placer:get_player_name())) then
+					and creative.is_enabled_for(player_name)) then
 				itemstack:take_item()
 			end
 			return itemstack
diff --git a/mods/boats/init.lua b/mods/boats/init.lua
index 4d8f467..ce67e91 100644
--- a/mods/boats/init.lua
+++ b/mods/boats/init.lua
@@ -230,7 +230,8 @@ minetest.register_craftitem("boats:boat", {
 		local node = minetest.get_node(under)
 		local udef = minetest.registered_nodes[node.name]
 		if udef and udef.on_rightclick and
-				not (placer and placer:get_player_control().sneak) then
+				not (placer and placer:is_player() and
+				placer:get_player_control().sneak) then
 			return udef.on_rightclick(under, node, placer, itemstack,
 				pointed_thing) or itemstack
 		end
@@ -244,9 +245,12 @@ minetest.register_craftitem("boats:boat", {
 		pointed_thing.under.y = pointed_thing.under.y + 0.5
 		boat = minetest.add_entity(pointed_thing.under, "boats:boat")
 		if boat then
-			boat:setyaw(placer:get_look_horizontal())
-			if not (creative and creative.is_enabled_for
-					and creative.is_enabled_for(placer:get_player_name())) then
+			if placer then
+				boat:setyaw(placer:get_look_horizontal())
+			end
+			local player_name = placer and placer:get_player_name() or ""
+			if not (creative and creative.is_enabled_for and
+					creative.is_enabled_for(player_name)) then
 				itemstack:take_item()
 			end
 		end
diff --git a/mods/bucket/init.lua b/mods/bucket/init.lua
index 5076dec..62392e9 100644
--- a/mods/bucket/init.lua
+++ b/mods/bucket/init.lua
@@ -69,7 +69,8 @@ function bucket.register_liquid(source, flowing, itemname, inventory_image, name
 
 				-- Call on_rightclick if the pointed node defines it
 				if ndef and ndef.on_rightclick and
-				   user and not user:get_player_control().sneak then
+						not (user and user:is_player() and
+						user:get_player_control().sneak) then
 					return ndef.on_rightclick(
 						pointed_thing.under,
 						node, user,
diff --git a/mods/carts/cart_entity.lua b/mods/carts/cart_entity.lua
index 8f73374..031e456 100644
--- a/mods/carts/cart_entity.lua
+++ b/mods/carts/cart_entity.lua
@@ -367,7 +367,8 @@ minetest.register_craftitem("carts:cart", {
 		local node = minetest.get_node(under)
 		local udef = minetest.registered_nodes[node.name]
 		if udef and udef.on_rightclick and
-				not (placer and placer:get_player_control().sneak) then
+				not (placer and placer:is_player() and
+				placer:get_player_control().sneak) then
 			return udef.on_rightclick(under, node, placer, itemstack,
 				pointed_thing) or itemstack
 		end
diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 87e7483..4c8d2f0 100644
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -319,7 +319,7 @@ end
 -- Prevent decay of placed leaves
 
 default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
-	if placer and not placer:get_player_control().sneak then
+	if placer and placer:is_player() and not placer:get_player_control().sneak then
 		local node = minetest.get_node(pos)
 		node.param2 = 1
 		minetest.set_node(pos, node)
diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index 36d5834..b02951d 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -673,9 +673,7 @@ minetest.register_node("default:apple", {
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = function(pos, placer, itemstack)
-		if placer:is_player() then
-			minetest.set_node(pos, {name = "default:apple", param2 = 1})
-		end
+		minetest.set_node(pos, {name = "default:apple", param2 = 1})
 	end,
 })
 
diff --git a/mods/default/tools.lua b/mods/default/tools.lua
index 45c779f..77ea969 100644
--- a/mods/default/tools.lua
+++ b/mods/default/tools.lua
@@ -389,7 +389,8 @@ minetest.register_tool("default:key", {
 		local node = minetest.get_node(under)
 		local def = minetest.registered_nodes[node.name]
 		if def and def.on_rightclick and
-				not (placer and placer:get_player_control().sneak) then
+				not (placer and placer:is_player() and
+				placer:get_player_control().sneak) then
 			return def.on_rightclick(under, node, placer, itemstack,
 				pointed_thing) or itemstack
 		end
diff --git a/mods/default/torch.lua b/mods/default/torch.lua
index 3c3ae96..a7b83cf 100644
--- a/mods/default/torch.lua
+++ b/mods/default/torch.lua
@@ -63,7 +63,8 @@ minetest.register_node("default:torch", {
 		local node = minetest.get_node(under)
 		local def = minetest.registered_nodes[node.name]
 		if def and def.on_rightclick and
-			((not placer) or (placer and not placer:get_player_control().sneak)) then
+			not (placer and placer:is_player() and
+			placer:get_player_control().sneak) then
 			return def.on_rightclick(under, node, placer, itemstack,
 				pointed_thing) or itemstack
 		end
diff --git a/mods/default/trees.lua b/mods/default/trees.lua
index d00a6b5..44176d7 100644
--- a/mods/default/trees.lua
+++ b/mods/default/trees.lua
@@ -468,7 +468,9 @@ function default.sapling_on_place(itemstack, placer, pointed_thing,
 	local node = minetest.get_node_or_nil(pos)
 	local pdef = node and minetest.registered_nodes[node.name]
 
-	if pdef and pdef.on_rightclick and not placer:get_player_control().sneak then
+	if pdef and pdef.on_rightclick and
+			not (placer and placer:is_player() and
+			placer:get_player_control().sneak) then
 		return pdef.on_rightclick(pos, node, placer, itemstack, pointed_thing)
 	end
 
@@ -481,7 +483,7 @@ function default.sapling_on_place(itemstack, placer, pointed_thing,
 		end
 	end
 
-	local player_name = placer:get_player_name()
+	local player_name = placer and placer:get_player_name() or ""
 	-- Check sapling position for protection
 	if minetest.is_protected(pos, player_name) then
 		minetest.record_protection_violation(pos, player_name)
diff --git a/mods/doors/init.lua b/mods/doors/init.lua
index b353503..4811678 100644
--- a/mods/doors/init.lua
+++ b/mods/doors/init.lua
@@ -266,7 +266,8 @@ function doors.register(name, def)
 			local node = minetest.get_node(pointed_thing.under)
 			local pdef = minetest.registered_nodes[node.name]
 			if pdef and pdef.on_rightclick and
-					not placer:get_player_control().sneak then
+					not (placer and placer:is_player() and
+					placer:get_player_control().sneak) then
 				return pdef.on_rightclick(pointed_thing.under,
 						node, placer, itemstack, pointed_thing)
 			end
@@ -290,12 +291,12 @@ function doors.register(name, def)
 				return itemstack
 			end
 
-			local pn = placer:get_player_name()
+			local pn = placer and placer:get_player_name() or ""
 			if minetest.is_protected(pos, pn) or minetest.is_protected(above, pn) then
 				return itemstack
 			end
 
-			local dir = minetest.dir_to_facedir(placer:get_look_dir())
+			local dir = placer and minetest.dir_to_facedir(placer:get_look_dir()) or 0
 
 			local ref = {
 				{x = -1, y = 0, z = 0},
diff --git a/mods/farming/api.lua b/mods/farming/api.lua
index 150301a..1c63ee3 100644
--- a/mods/farming/api.lua
+++ b/mods/farming/api.lua
@@ -144,12 +144,14 @@ farming.place_seed = function(itemstack, placer, pointed_thing, plantname)
 	local under = minetest.get_node(pt.under)
 	local above = minetest.get_node(pt.above)
 
-	if minetest.is_protected(pt.under, placer:get_player_name()) then
-		minetest.record_protection_violation(pt.under, placer:get_player_name())
+	local player_name = placer and placer:get_player_name() or ""
+
+	if minetest.is_protected(pt.under, player_name) then
+		minetest.record_protection_violation(pt.under, player_name)
 		return
 	end
-	if minetest.is_protected(pt.above, placer:get_player_name()) then
-		minetest.record_protection_violation(pt.above, placer:get_player_name())
+	if minetest.is_protected(pt.above, player_name) then
+		minetest.record_protection_violation(pt.above, player_name)
 		return
 	end
 
@@ -180,7 +182,7 @@ farming.place_seed = function(itemstack, placer, pointed_thing, plantname)
 	minetest.add_node(pt.above, {name = plantname, param2 = 1})
 	tick(pt.above)
 	if not (creative and creative.is_enabled_for
-			and creative.is_enabled_for(placer:get_player_name())) then
+			and creative.is_enabled_for(player_name)) then
 		itemstack:take_item()
 	end
 	return itemstack
@@ -310,7 +312,8 @@ farming.register_plant = function(name, def)
 			local node = minetest.get_node(under)
 			local udef = minetest.registered_nodes[node.name]
 			if udef and udef.on_rightclick and
-					not (placer and placer:get_player_control().sneak) then
+					not (placer and placer:is_player() and
+					placer:get_player_control().sneak) then
 				return udef.on_rightclick(under, node, placer, itemstack,
 					pointed_thing) or itemstack
 			end
diff --git a/mods/flowers/init.lua b/mods/flowers/init.lua
index b584939..006e74d 100644
--- a/mods/flowers/init.lua
+++ b/mods/flowers/init.lua
@@ -278,7 +278,7 @@ minetest.register_node("flowers:waterlily", {
 		local pos = pointed_thing.above
 		local node = minetest.get_node(pointed_thing.under)
 		local def = minetest.registered_nodes[node.name]
-		local player_name = placer:get_player_name()
+		local player_name = placer and placer:get_player_name() or ""
 
 		if def and def.on_rightclick then
 			return def.on_rightclick(pointed_thing.under, node, placer, itemstack,
diff --git a/mods/screwdriver/init.lua b/mods/screwdriver/init.lua
index e76f054..634edf8 100644
--- a/mods/screwdriver/init.lua
+++ b/mods/screwdriver/init.lua
@@ -85,9 +85,10 @@ screwdriver.handler = function(itemstack, user, pointed_thing, mode, uses)
 	end
 
 	local pos = pointed_thing.under
+	local player_name = user and user:get_player_name() or ""
 
-	if minetest.is_protected(pos, user:get_player_name()) then
-		minetest.record_protection_violation(pos, user:get_player_name())
+	if minetest.is_protected(pos, player_name) then
+		minetest.record_protection_violation(pos, player_name)
 		return
 	end
 
@@ -133,8 +134,8 @@ screwdriver.handler = function(itemstack, user, pointed_thing, mode, uses)
 		minetest.check_for_falling(pos)
 	end
 
-	if not (creative and creative.is_enabled_for
-			and creative.is_enabled_for(user:get_player_name())) then
+	if not (creative and creative.is_enabled_for and
+			creative.is_enabled_for(player_name)) then
 		itemstack:add_wear(65535 / ((uses or 200) - 1))
 	end
 
diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index b88e6a8..a8f72e8 100644
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -22,21 +22,23 @@ local function rotate_and_place(itemstack, placer, pointed_thing)
 	local p1 = pointed_thing.above
 	local param2 = 0
 
-	local placer_pos = placer:getpos()
-	if placer_pos then
-		param2 = minetest.dir_to_facedir(vector.subtract(p1, placer_pos))
-	end
+	if placer then
+		local placer_pos = placer:getpos()
+		if placer_pos then
+			param2 = minetest.dir_to_facedir(vector.subtract(p1, placer_pos))
+		end
 
-	local finepos = minetest.pointed_thing_to_face_pos(placer, pointed_thing)
-	local fpos = finepos.y % 1
+		local finepos = minetest.pointed_thing_to_face_pos(placer, pointed_thing)
+		local fpos = finepos.y % 1
 
-	if p0.y - 1 == p1.y or (fpos > 0 and fpos < 0.5)
-			or (fpos < -0.5 and fpos > -0.999999999) then
-		param2 = param2 + 20
-		if param2 == 21 then
-			param2 = 23
-		elseif param2 == 23 then
-			param2 = 21
+		if p0.y - 1 == p1.y or (fpos > 0 and fpos < 0.5)
+				or (fpos < -0.5 and fpos > -0.999999999) then
+			param2 = param2 + 20
+			if param2 == 21 then
+				param2 = 23
+			elseif param2 == 23 then
+				param2 = 21
+			end
 		end
 	end
 	return minetest.item_place(itemstack, placer, pointed_thing, param2)
@@ -152,8 +154,9 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
 		on_place = function(itemstack, placer, pointed_thing)
 			local under = minetest.get_node(pointed_thing.under)
 			local wield_item = itemstack:get_name()
+			local player_name = placer and placer:get_player_name() or ""
 			local creative_enabled = (creative and creative.is_enabled_for
-					and creative.is_enabled_for(placer:get_player_name()))
+					and creative.is_enabled_for(player_name))
 
 			if under and under.name:find("stairs:slab_") then
 				-- place slab using under node orientation
@@ -169,9 +172,8 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
 					if not recipeitem then
 						return itemstack
 					end
-					local player_name = placer:get_player_name()
 					if minetest.is_protected(pointed_thing.under, player_name) and not
-							minetest.check_player_privs(placer, "protection_bypass") then
+							minetest.check_player_privs(player_name, "protection_bypass") then
 						minetest.record_protection_violation(pointed_thing.under,
 							player_name)
 						return