Remove pcall wrappers completely, add command to disable advtrains mainloop

8 files changed, 146 insertions, 179 deletions

diff --git a/advtrains/atc.lua b/advtrains/atc.lua
index 1c6df36..0cb6019 100644
--- a/advtrains/atc.lua
+++ b/advtrains/atc.lua
@@ -108,53 +108,49 @@ advtrains.atc_function = function(def, preset, suffix, rotation)
 		return {
 			after_place_node=apn_func,
 			after_dig_node=function(pos)
-				return advtrains.pcall(function()
-					advtrains.invalidate_all_paths(pos)
-					advtrains.ndb.clear(pos)
-					local pts=minetest.pos_to_string(pos)
-					atc.controllers[pts]=nil
-				end)
+				advtrains.invalidate_all_paths(pos)
+				advtrains.ndb.clear(pos)
+				local pts=minetest.pos_to_string(pos)
+				atc.controllers[pts]=nil
 			end,
 			on_receive_fields = function(pos, formname, fields, player)
-				return advtrains.pcall(function()
-					if advtrains.is_protected(pos, player:get_player_name()) then
-						minetest.record_protection_violation(pos, player:get_player_name())
+				if advtrains.is_protected(pos, player:get_player_name()) then
+					minetest.record_protection_violation(pos, player:get_player_name())
+					return
+				end
+				local meta=minetest.get_meta(pos)
+				if meta then
+					if not fields.save then 
+						--[[--maybe only the dropdown changed
+						if fields.mode then
+							meta:set_string("mode", idxtrans[fields.mode])
+							if fields.mode=="digiline" then
+								meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", fields.mode, meta:get_string("command")) )
+							else
+								meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", fields.mode, meta:get_string("command")) )
+							end
+							meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
+						end]]--
 						return
 					end
-					local meta=minetest.get_meta(pos)
-					if meta then
-						if not fields.save then 
-							--maybe only the dropdown changed
-							if fields.mode then
-								meta:set_string("mode", idxtrans[fields.mode])
-								if fields.mode=="digiline" then
-									meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", (fields.mode or "?"), meta:get_string("command")) )
-								else
-									meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", (fields.mode or "?"), meta:get_string("command")) )
-								end
-								meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
-							end
-							return
-						end
-						meta:set_string("mode", idxtrans[fields.mode])
-						meta:set_string("command", fields.command)
-						meta:set_string("command_on", fields.command_on)
-						meta:set_string("channel", fields.channel)
-						if fields.mode=="digiline" then
-							meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", (fields.mode or "?"), meta:get_string("command")) )
-						else
-							meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", (fields.mode or "?"), meta:get_string("command")) )
-						end
-						meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
-						
-						local pts=minetest.pos_to_string(pos)
-						local _, conns=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
-						atc.controllers[pts]={command=fields.command}
-						if #advtrains.occ.get_trains_at(pos) > 0 then
-							atc.send_command(pos)
-						end
+					--meta:set_string("mode", idxtrans[fields.mode])
+					meta:set_string("command", fields.command)
+					--meta:set_string("command_on", fields.command_on)
+					meta:set_string("channel", fields.channel)
+					--if fields.mode=="digiline" then
+					--	meta:set_string("infotext", attrans("ATC controller, mode @1\nChannel: @2", fields.mode, meta:get_string("command")) )
+					--else
+					meta:set_string("infotext", attrans("ATC controller, mode @1\nCommand: @2", "-", meta:get_string("command")) )
+					--end
+					meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
+					
+					local pts=minetest.pos_to_string(pos)
+					local _, conns=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
+					atc.controllers[pts]={command=fields.command}
+					if #advtrains.occ.get_trains_at(pos) > 0 then
+						atc.send_command(pos)
 					end
-				end)
+				end
 			end,
 			advtrains = {
 				on_train_enter = function(pos, train_id)
diff --git a/advtrains/copytool.lua b/advtrains/copytool.lua
index dc18081..0c1cdfe 100644
--- a/advtrains/copytool.lua
+++ b/advtrains/copytool.lua
@@ -13,76 +13,74 @@ minetest.register_tool("advtrains:copytool", {
 	-- The front of the train is used as the start of the new train and it proceeds backwards from
 	-- the direction of travel.
 	on_place = function(itemstack, placer, pointed_thing)
-			return advtrains.pcall(function()
-				if ((not pointed_thing.type == "node") or (not placer.get_player_name)) then
-					return
-				end
-				local pname = placer:get_player_name()
-
-				local node=minetest.get_node_or_nil(pointed_thing.under)
-				if not node then atprint("[advtrains]Ignore at placer position") return itemstack end
-				local nodename=node.name
-				if(not advtrains.is_track_and_drives_on(nodename, {default=true})) then
-					atprint("no track here, not placing.")
-					return itemstack
-				end
-				if not minetest.check_player_privs(placer, {train_operator = true }) then
-					minetest.chat_send_player(pname, "You don't have the train_operator privilege.")
-					return itemstack
-				end
-				if not minetest.check_player_privs(placer, {train_admin = true }) and minetest.is_protected(pointed_thing.under, placer:get_player_name()) then
-					return itemstack
-				end
-				local tconns=advtrains.get_track_connections(node.name, node.param2)
-				local yaw = placer:get_look_horizontal()
-				local plconnid = advtrains.yawToClosestConn(yaw, tconns)
-
-				local prevpos = advtrains.get_adjacent_rail(pointed_thing.under, tconns, plconnid, {default=true})
-				if not prevpos then
-					minetest.chat_send_player(pname, "The track you are trying to place the wagon on is not long enough!")
-					return
-				end
-
-				local meta = itemstack:get_meta()
-				if not meta then
-					minetest.chat_send_player(pname, attrans("The clipboard couldn't access the metadata. Paste failed."))
+			if ((not pointed_thing.type == "node") or (not placer.get_player_name)) then
 				return
-				end
-				local clipboard = meta:get_string("clipboard")
-				if (clipboard == "") then
-					minetest.chat_send_player(pname, "The clipboard is empty.");
-					return
-				end
-				clipboard = minetest.deserialize(clipboard)
-				if (clipboard.wagons == nil) then
-					minetest.chat_send_player(pname, "The clipboard is empty.");
-					return
-				end
-
-				local wagons = {}
-				local n = 1
-				for _, wagonProto in pairs(clipboard.wagons) do
-					local wagon = advtrains.create_wagon(wagonProto.type, pname)
-					advtrains.wagons[wagon].wagon_flipped = wagonProto.wagon_flipped
-					wagons[n] = wagon
-					n = n + 1
-				end
-
-				local id=advtrains.create_new_train_at(pointed_thing.under, plconnid, 0, wagons)
-				local train = advtrains.trains[id]
-				train.off_track = train.end_index<train.path_trk_b
-				if (train.off_track) then
-					minetest.chat_send_player(pname, "Back of train would end up off track, cancelling.")
-					advtrains.remove_train(id)
-					return
-				end
-				train.text_outside = clipboard.text_outside
-				train.text_inside = clipboard.text_inside
-				train.routingcode = clipboard.routingcode
-				train.line = clipboard.line
+			end
+			local pname = placer:get_player_name()
+
+			local node=minetest.get_node_or_nil(pointed_thing.under)
+			if not node then atprint("[advtrains]Ignore at placer position") return itemstack end
+			local nodename=node.name
+			if(not advtrains.is_track_and_drives_on(nodename, {default=true})) then
+				atprint("no track here, not placing.")
+				return itemstack
+			end
+			if not minetest.check_player_privs(placer, {train_operator = true }) then
+				minetest.chat_send_player(pname, "You don't have the train_operator privilege.")
+				return itemstack
+			end
+			if not minetest.check_player_privs(placer, {train_admin = true }) and minetest.is_protected(pointed_thing.under, placer:get_player_name()) then
+				return itemstack
+			end
+			local tconns=advtrains.get_track_connections(node.name, node.param2)
+			local yaw = placer:get_look_horizontal()
+			local plconnid = advtrains.yawToClosestConn(yaw, tconns)
+
+			local prevpos = advtrains.get_adjacent_rail(pointed_thing.under, tconns, plconnid, {default=true})
+			if not prevpos then
+				minetest.chat_send_player(pname, "The track you are trying to place the wagon on is not long enough!")
+				return
+			end
 
+			local meta = itemstack:get_meta()
+			if not meta then
+				minetest.chat_send_player(pname, attrans("The clipboard couldn't access the metadata. Paste failed."))
+			return
+			end
+			local clipboard = meta:get_string("clipboard")
+			if (clipboard == "") then
+				minetest.chat_send_player(pname, "The clipboard is empty.");
 				return
-			end)
+			end
+			clipboard = minetest.deserialize(clipboard)
+			if (clipboard.wagons == nil) then
+				minetest.chat_send_player(pname, "The clipboard is empty.");
+				return
+			end
+
+			local wagons = {}
+			local n = 1
+			for _, wagonProto in pairs(clipboard.wagons) do
+				local wagon = advtrains.create_wagon(wagonProto.type, pname)
+				advtrains.wagons[wagon].wagon_flipped = wagonProto.wagon_flipped
+				wagons[n] = wagon
+				n = n + 1
+			end
+
+			local id=advtrains.create_new_train_at(pointed_thing.under, plconnid, 0, wagons)
+			local train = advtrains.trains[id]
+			train.off_track = train.end_index<train.path_trk_b
+			if (train.off_track) then
+				minetest.chat_send_player(pname, "Back of train would end up off track, cancelling.")
+				advtrains.remove_train(id)
+				return
+			end
+			train.text_outside = clipboard.text_outside
+			train.text_inside = clipboard.text_inside
+			train.routingcode = clipboard.routingcode
+			train.line = clipboard.line
+
+			return
 		end,
 	-- Copy: Take the pointed-at train and put it on the clipboard
 	on_use = function(itemstack, user, pointed_thing)
@@ -182,4 +180,4 @@ minetest.register_tool("advtrains:copytool", {
 		minetest.chat_send_player(user:get_player_name(), attrans("Train copied!"))
 		return itemstack
 	end
-})
\ No newline at end of file
+})
diff --git a/advtrains/couple.lua b/advtrains/couple.lua
index 76fa447..1e16690 100644
--- a/advtrains/couple.lua
+++ b/advtrains/couple.lua
@@ -32,7 +32,6 @@ minetest.register_entity("advtrains:discouple", {
 	end,
 	get_staticdata=function() return "DISCOUPLE" end,
 	on_punch=function(self, player)
-		return advtrains.pcall(function()
 			local pname = player:get_player_name()
 			if pname and pname~="" and self.wagon then
 				if advtrains.safe_decouple_wagon(self.wagon.id, pname) then
@@ -41,10 +40,8 @@ minetest.register_entity("advtrains:discouple", {
 					minetest.add_entity(self.object:getpos(), "advtrains:lockmarker")
 				end
 			end
-		end)
 	end,
 	on_step=function(self, dtime)
-		return advtrains.pcall(function()
 			if not self.wagon then
 				self.object:remove()
 				return
@@ -58,7 +55,6 @@ minetest.register_entity("advtrains:discouple", {
 				self.object:remove()
 				return
 			end
-		end)
 	end,
 })
 
@@ -79,7 +75,6 @@ minetest.register_entity("advtrains:couple", {
 	is_couple=true,
 	static_save = false,
 	on_activate=function(self, staticdata)
-		return advtrains.pcall(function()
 			if staticdata=="COUPLE" then
 				--couple entities have no right to exist further...
 				atprint("Couple loaded from staticdata, destroying")
@@ -87,11 +82,9 @@ minetest.register_entity("advtrains:couple", {
 				return
 			end
 			self.object:set_armor_groups({immmortal=1})
-		end)
 	end,
 	get_staticdata=function(self) return "COUPLE" end,
 	on_rightclick=function(self, clicker)
-		return advtrains.pcall(function()
 			if not self.train_id_1 or not self.train_id_2 then return end
 			
 			local pname=clicker
@@ -102,15 +95,12 @@ minetest.register_entity("advtrains:couple", {
 			else
 				lockmarker(self.object)
 			end
-		end)
 	end,
 	on_step=function(self, dtime)
-		return advtrains.pcall(function()
 			if advtrains.wagon_outside_range(self.object:getpos()) then
 				self.object:remove()
 				return
 			end
-			advtrains.atprint_context_tid=self.train_id_1
 
 			if not self.train_id_1 or not self.train_id_2 then atprint("Couple: train ids not set!") self.object:remove() return end
 			local train1=advtrains.trains[self.train_id_1]
@@ -161,8 +151,6 @@ minetest.register_entity("advtrains:couple", {
 			end
 			atprintbm("couple step", t)
 			advtrains.atprint_context_tid=nil
-
-		end)
 	end,
 })
 minetest.register_entity("advtrains:lockmarker", {
@@ -175,7 +163,6 @@ minetest.register_entity("advtrains:lockmarker", {
 	is_lockmarker=true,
 	static_save = false,
 	on_activate=function(self, staticdata)
-		return advtrains.pcall(function()
 			if staticdata=="COUPLE" then
 				--couple entities have no right to exist further...
 				atprint("Couple loaded from staticdata, destroying")
@@ -184,7 +171,6 @@ minetest.register_entity("advtrains:lockmarker", {
 			end
 			self.object:set_armor_groups({immmortal=1})
 			self.life=5
-		end)
 	end,
 	get_staticdata=function(self) return "COUPLE" end,
 	on_step=function(self, dtime)
diff --git a/advtrains/init.lua b/advtrains/init.lua
index 3e2177e..06ac66b 100644
--- a/advtrains/init.lua
+++ b/advtrains/init.lua
@@ -61,26 +61,6 @@ local function reload_saves()
 	end)
 end
 
-function advtrains.pcall(fun)
-	if no_action then return end
-	
-	local succ, return1, return2, return3, return4=xpcall(fun, function(err)
-			atwarn("Lua Error occured: ", err)
-			atwarn(debug.traceback())
-			if advtrains.atprint_context_tid then
-				advtrains.path_print(advtrains.trains[advtrains.atprint_context_tid], atdebug)
-				atwarn(advtrains.trains[advtrains.atprint_context_tid].debug)
-			end
-		end)
-	if not succ then
-		error("pcall")
-		reload_saves()
-	else
-		return return1, return2, return3, return4
-	end
-end
-
-
 advtrains.modpath = minetest.get_modpath("advtrains")
 
 --Advtrains dump (special treatment of pos and sigd)
@@ -569,7 +549,11 @@ advtrains.mainloop_runcnt=0
 
 local t = 0
 minetest.register_globalstep(function(dtime_mt)
-	return advtrains.pcall(function()
+		if no_action then
+			-- the advtrains globalstep is skipped by command. Return immediately
+			return
+		end
+
 		advtrains.mainloop_runcnt=advtrains.mainloop_runcnt+1
 		--atprint("Running the main loop, runcnt",advtrains.mainloop_runcnt)
 		--call load once. see advtrains.load() comment
@@ -615,7 +599,6 @@ minetest.register_globalstep(function(dtime_mt)
 			save_timer=save_interval
 			atprintbm("saving", t)
 		end
-	end)
 end)
 
 --if something goes wrong in these functions, there is no help. no pcall here.
@@ -644,6 +627,11 @@ function advtrains.save(remove_players_from_wagons)
 		atwarn("Instructed to save() but load() was never called!")
 		return
 	end
+	if no_action then
+		atlog("[save] Saving requested externally, but Advtrains step is disabled. Not saving any data as state may be inconsistent.")
+		return
+	end
+	
 	advtrains.avt_save(remove_players_from_wagons) --saving advtrains. includes ndb at advtrains.ndb.save_data()
 	if atlatc then
 		atlatc.save()
@@ -664,11 +652,9 @@ minetest.register_chatcommand("at_empty_seats",
         description = "Detach all players, especially the offline ones, from all trains. Use only when no one serious is on a train.", -- Full description
         privs = {train_operator=true, server=true}, -- Require the "privs" privilege to run
         func = function(name, param)
-			return advtrains.pcall(function()
 				atwarn("Data is being saved. While saving, advtrains will remove the players from trains. Save files will be reloaded afterwards!")
 				advtrains.save(true)
 				reload_saves()
-			end)
         end,
 })
 -- This chat command solves another problem: Trains getting randomly stuck.
@@ -678,13 +664,36 @@ minetest.register_chatcommand("at_reroute",
         description = "Delete all train routes, force them to recalculate", 
         privs = {train_operator=true}, -- Only train operator is required, since this is relatively safe.
         func = function(name, param)
-			return advtrains.pcall(function()
 				advtrains.invalidate_all_paths()
 				return true, "Successfully invalidated train routes"
-			end)
         end,
 })
 
+minetest.register_chatcommand("at_disable_step",
+	{
+        params = "<yes/no>", 
+        description = "Disable the advtrains globalstep temporarily", 
+        privs = {server=true},
+        func = function(name, param)
+			if minetest.is_yes(param) then
+				-- disable everything, and turn off saving
+				no_action = true;
+				atwarn("The advtrains globalstep has been disabled. Trains are not moving, and no data is saved! Run '/at_disable_step no' to enable again!")
+				return true, "Disabled advtrains successfully"
+			elseif no_action then
+				atwarn("Re-enabling advtrains globalstep...")
+				reload_saves()
+				return true
+			else
+				return false, "Advtrains is already running normally!"
+			end
+        end,
+})
+
+advtrains.is_no_action = function()
+	return no_action
+end
+
 
 local tot=(os.clock()-lot)*1000
 minetest.log("action", "[advtrains] Loaded in "..tot.."ms")
diff --git a/advtrains/nodedb.lua b/advtrains/nodedb.lua
index 878ed88..048d5b4 100644
--- a/advtrains/nodedb.lua
+++ b/advtrains/nodedb.lua
@@ -282,7 +282,6 @@ function advtrains.get_rail_info_at(pos, drives_on)
 end
 
 ndb.run_lbm = function(pos, node)
-	return advtrains.pcall(function()
 		local cid=ndbget(pos.x, pos.y, pos.z)
 		if cid then
 			--if in database, detect changes and apply.
@@ -310,7 +309,6 @@ ndb.run_lbm = function(pos, node)
 			ndb.update(pos, node)
 		end
 		return false
-	end)
 end
 
 
@@ -358,9 +356,7 @@ ndb.restore_all = function()
 end
     
 minetest.register_on_dignode(function(pos, oldnode, digger)
-	return advtrains.pcall(function()
 		ndb.clear(pos)
-	end)
 end)
 
 function ndb.get_nodes()
@@ -381,14 +377,12 @@ minetest.register_chatcommand("at_sync_ndb",
         description = "Write node db back to map and find ghost nodes", -- Full description
         privs = {train_operator=true}, 
         func = function(name, param)
-			return advtrains.pcall(function()
 				if os.time() < ptime+30 then
 					return false, "Please wait at least 30s from the previous execution of /at_restore_ndb!"
 				end
 				local text = ndb.restore_all()
 				ptime=os.time()
 				return true, text
-			end)
         end,
     })
 
diff --git a/advtrains/trackplacer.lua b/advtrains/trackplacer.lua
index 904d851..356df15 100644
--- a/advtrains/trackplacer.lua
+++ b/advtrains/trackplacer.lua
@@ -275,8 +275,7 @@ function tp.register_track_placer(nnprefix, imgprefix, dispname, def)
 		groups={advtrains_trackplacer=1, digtron_on_place=1},
 		liquids_pointable = def.liquids_pointable,
 		on_place = function(itemstack, placer, pointed_thing)
-			return advtrains.pcall(function()
-					local name = placer:get_player_name()
+				local name = placer:get_player_name()
 				if not name then
 				   return itemstack, false
 				end
@@ -303,7 +302,6 @@ function tp.register_track_placer(nnprefix, imgprefix, dispname, def)
 					end
 				end
 				return itemstack, true
-			end)
 		end,
 	})
 end
@@ -317,7 +315,6 @@ minetest.register_craftitem("advtrains:trackworker",{
 	wield_image = "advtrains_trackworker.png",
 	stack_max = 1,
 	on_place = function(itemstack, placer, pointed_thing)
-		return advtrains.pcall(function()
 			local name = placer:get_player_name()
 			if not name then
 				return
@@ -382,10 +379,8 @@ minetest.register_craftitem("advtrains:trackworker",{
 					advtrains.ndb.swap_node(pos, {name=nnprefix.."_"..suffix..modext[modpos+1], param2=node.param2})
 				end
 			end
-		end)
 	end,
 	on_use=function(itemstack, user, pointed_thing)
-		return advtrains.pcall(function()
 				local name = user:get_player_name()
 			if not name then
 			   return
@@ -430,7 +425,6 @@ minetest.register_craftitem("advtrains:trackworker",{
 			else
 				atprint(name, dump(tp.tracks))
 			end
-		end)
 	end,
 })
 
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua
index a5da28e..9e9f021 100644
--- a/advtrains/trainlogic.lua
+++ b/advtrains/trainlogic.lua
@@ -127,7 +127,6 @@ function advtrains.tp_player_to_train(player)
 	end
 end
 minetest.register_on_joinplayer(function(player)
-	return advtrains.pcall(function()
 		advtrains.hud[player:get_player_name()] = nil
 		advtrains.hhud[player:get_player_name()] = nil
 		--independent of this, cause all wagons of the train which are loaded to reattach their players
@@ -137,12 +136,10 @@ minetest.register_on_joinplayer(function(player)
 				wagon:reattach_all()
 			end
 		end
-	end)
 end)
 
 
 minetest.register_on_dieplayer(function(player)
-	return advtrains.pcall(function()
 		local pname=player:get_player_name()
 		local id=advtrains.player_to_train_mapping[pname]
 		if id then
@@ -156,7 +153,6 @@ minetest.register_on_dieplayer(function(player)
 				end
 			end
 		end
-	end)
 end)
 
 --[[
@@ -421,7 +417,7 @@ function advtrains.train_step_b(id, train, dtime)
 					v_target_apply(v_targets, VLEVER_EMERG, braketar)
 				end
 			else
-				v_target_apply(v_targets, VLEVER_BRAKE, braketar)
+				v_target_apply(v_targets, VLEVER_ROLL, braketar)
 			end
 		end
 	end
diff --git a/advtrains/wagons.lua b/advtrains/wagons.lua
index ca582c1..66d083e 100644
--- a/advtrains/wagons.lua
+++ b/advtrains/wagons.lua
@@ -166,7 +166,6 @@ end
 
 -- Remove the wagon
 function wagon:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
-	return advtrains.pcall(function()
 		if not self:ensure_init() then return end
 		
 		local data = advtrains.wagons[self.id]
@@ -223,7 +222,6 @@ function wagon:on_punch(puncher, time_from_last_punch, tool_capabilities, direct
 		for _,item in ipairs(self.drops or {self.name}) do
 			inv:add_item("main", item)
 		end
-	end)
 end
 function wagon:destroy()
 	--some rules:
@@ -268,9 +266,13 @@ function wagon:is_driver_stand(seat)
 end
 
 function wagon:on_step(dtime)
-	return advtrains.pcall(function()
 		if not self:ensure_init() then return end
 		
+		if advtrains.is_no_action() then
+			self.object:remove()
+			return
+		end
+		
 		local t=os.clock()
 		local pos = self.object:getpos()
 		local data = advtrains.wagons[self.id]
@@ -595,11 +597,9 @@ function wagon:on_step(dtime)
 		self.old_acceleration_vector=accelerationvec
 		self.old_yaw=yaw
 		atprintbm("wagon step", t)
-	end)
 end
 
 function wagon:on_rightclick(clicker)
-	return advtrains.pcall(function()
 		if not self:ensure_init() then return end
 		if not clicker or not clicker:is_player() then
 			return
@@ -687,7 +687,6 @@ function wagon:on_rightclick(clicker)
 				self:show_get_on_form(pname)
 			end
 		end
-	end)
 end
 
 function wagon:get_on(clicker, seatno)
@@ -1101,7 +1100,6 @@ function wagon:handle_bordcom_fields(pname, formname, fields)
 end
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
-	return advtrains.pcall(function()
 		local uid=string.match(formname, "^advtrains_geton_(.+)$")
 		if uid then
 			for _,wagon in pairs(minetest.luaentities) do
@@ -1185,7 +1183,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 				end
 			end
 		end
-	end)
 end)
 function wagon:seating_from_key_helper(pname, fields, no)
 	local data = advtrains.wagons[self.id]
@@ -1389,7 +1386,6 @@ function advtrains.register_wagon(sysname_p, prototype, desc, inv_img, nincreati
 		groups = { not_in_creative_inventory = nincreative and 1 or 0},
 		
 		on_place = function(itemstack, placer, pointed_thing)
-			return advtrains.pcall(function()
 				if not pointed_thing.type == "node" then
 					return
 				end
@@ -1427,8 +1423,6 @@ function advtrains.register_wagon(sysname_p, prototype, desc, inv_img, nincreati
 					itemstack:take_item()
 				end
 				return itemstack
-				
-			end)
 		end,
 	})
 end