no world

code/modules/power/singularity/field_generator.dm

@@ -344,7 +344,7 @@ field_generator power level display
 	//I want to avoid using global variables.
 	spawn(1)
 		var/temp = 1 //stops spam
-		for(var/obj/singularity/O in world)
+		for(var/obj/singularity/O in singularities)
 			if(O.last_warning && temp)
 				if((world.time - O.last_warning) > 50) //to stop message-spam
 					temp = 0

code/modules/power/singularity/particle_accelerator/particle_accelerator.dm

@@ -216,20 +216,20 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 
 	switch(src.construction_state)//TODO:Might be more interesting to have it need several parts rather than a single list of steps
 		if(0)
-			if(istype(O, /obj/item/weapon/wrench) && !isinspace())
+			if(iswrench(O) && !isinspace())
 				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
 				src.anchored = 1
 				user.visible_message("[user.name] secures the [src.name] to the floor.", \
 					"You secure the external bolts.")
 				temp_state++
 		if(1)
-			if(istype(O, /obj/item/weapon/wrench))
+			if(iswrench(O))
 				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
 				src.anchored = 0
 				user.visible_message("[user.name] detaches the [src.name] from the floor.", \
 					"You remove the external bolts.")
 				temp_state--
-			else if(istype(O, /obj/item/stack/cable_coil))
+			else if(iscoil(O))
 				var/obj/item/stack/cable_coil/C = O
 				if(C.use(1))
 					user.visible_message("[user.name] adds wires to the [src.name].", \
@@ -239,16 +239,16 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 					user << "<span class='warning'>You need one length of cable to wire the [src.name]!</span>"
 					return
 		if(2)
-			if(istype(O, /obj/item/weapon/wirecutters))//TODO:Shock user if its on?
+			if(iswirecutter(O))//TODO:Shock user if its on?
 				user.visible_message("[user.name] removes some wires from the [src.name].", \
 					"You remove some wires.")
 				temp_state--
-			else if(istype(O, /obj/item/weapon/screwdriver))
+			else if(isscrewdriver(O))
 				user.visible_message("[user.name] closes the [src.name]'s access panel.", \
 					"You close the access panel.")
 				temp_state++
 		if(3)
-			if(istype(O, /obj/item/weapon/screwdriver))
+			if(isscrewdriver(O))
 				user.visible_message("[user.name] opens the [src.name]'s access panel.", \
 					"You open the access panel.")
 				temp_state--
@@ -368,35 +368,35 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	var/temp_state = src.construction_state
 	switch(src.construction_state)//TODO:Might be more interesting to have it need several parts rather than a single list of steps
 		if(0)
-			if(istype(O, /obj/item/weapon/wrench))
+			if(iswrench(O))
 				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
 				src.anchored = 1
 				user.visible_message("[user.name] secures the [src.name] to the floor.", \
 					"You secure the external bolts.")
 				temp_state++
 		if(1)
-			if(istype(O, /obj/item/weapon/wrench))
+			if(iswrench(O))
 				playsound(src.loc, 'sound/items/Ratchet.ogg', 75, 1)
 				src.anchored = 0
 				user.visible_message("[user.name] detaches the [src.name] from the floor.", \
 					"You remove the external bolts.")
 				temp_state--
-			else if(istype(O, /obj/item/stack/cable_coil))
+			else if(iscoil(O))
 				if(O:use(1))
 					user.visible_message("[user.name] adds wires to the [src.name].", \
 						"You add some wires.")
 					temp_state++
 		if(2)
-			if(istype(O, /obj/item/weapon/wirecutters))//TODO:Shock user if its on?
+			if(iswirecutter(O))//TODO:Shock user if its on?
 				user.visible_message("[user.name] removes some wires from the [src.name].", \
 					"You remove some wires.")
 				temp_state--
-			else if(istype(O, /obj/item/weapon/screwdriver))
+			else if(isscrewdriver(O))
 				user.visible_message("[user.name] closes the [src.name]'s access panel.", \
 					"You close the access panel.")
 				temp_state++
 		if(3)
-			if(istype(O, /obj/item/weapon/screwdriver))
+			if(isscrewdriver(O))
 				user.visible_message("[user.name] opens the [src.name]'s access panel.", \
 					"You open the access panel.")
 				temp_state--

code/modules/power/singularity/singularity.dm

@@ -30,6 +30,7 @@
 
 /obj/singularity/New(loc, var/starting_energy = 50, var/temp = 0)
 	//CARN: admin-alert for chuckle-fuckery.
+	singularities += src
 	admin_investigate_setup()
 
 	src.energy = starting_energy
@@ -43,6 +44,7 @@
 
 /obj/singularity/Destroy()
 	processing_objects.Remove(src)
+	singularities -= src
 	return ..()
 
 /obj/singularity/Move(atom/newloc, direct)