More and more Destroy() cleanups all across the board - Return qdel hints.

code/modules/clothing/spacesuits/rig/modules/utility.dm

@@ -477,7 +477,7 @@
 
 	for(var/obj/item/weapon/mop_deploy/blade in M.contents)
 		M.drop_from_inventory(blade)
-		del(blade)
+		qdel(blade)
 
 
 	//Space Cleaner Launcher
@@ -520,7 +520,7 @@
 
 	user << "<font color='blue'><b>You slot \the [input_device] into the suit module.</b></font>"
 	user.drop_from_inventory(input_device)
-	del(input_device)
+	qdel(input_device)
 	accepted_item.charges++
 	return 1
 

code/modules/lighting/lighting_corner.dm

@@ -131,3 +131,9 @@
 
 /datum/lighting_corner/dummy/New()
 	return
+
+/datum/lighting_corner/Destroy(var/force)
+	if (!force)
+		return QDEL_HINT_LETMELIVE
+	crash_with("Who decided to force qdel() a lighting corner? Why did you do this?")
+	return ..()

code/modules/lighting/lighting_overlay.dm

@@ -39,7 +39,7 @@
 			log_debug("A lighting overlay realised its loc was NOT a turf (actual loc: [loc][loc ? ", " + loc.type : "null"]) in update_overlay() and got qdel'ed!")
 		else
 			log_debug("A lighting overlay realised it was in nullspace in update_overlay() and got pooled!")
-		qdel(src)
+		qdel(src, force=TRUE)
 		return
 
 	// To the future coder who sees this and thinks
@@ -121,14 +121,17 @@
 /atom/movable/lighting_overlay/throw_at()
 	return 0
 
-/atom/movable/lighting_overlay/Destroy()
-	total_lighting_overlays--
-	global.lighting_update_overlays     -= src
-	global.lighting_update_overlays_old -= src
+/atom/movable/lighting_overlay/Destroy(var/force)
+	if (force)
+		total_lighting_overlays--
+		global.lighting_update_overlays     -= src
+		global.lighting_update_overlays_old -= src
 
-	var/turf/T = loc
-	if(istype(T))
-		T.lighting_overlay = null
-		T.luminosity = 1
+		var/turf/T = loc
+		if(istype(T))
+			T.lighting_overlay = null
+			T.luminosity = 1
 
-	. = ..()
+		return ..()
+	else
+		return QDEL_HINT_LETMELIVE

code/modules/mob/freelook/ai/eye.dm

@@ -59,7 +59,7 @@
 
 /mob/living/silicon/ai/Destroy()
 	destroy_eyeobj()
-	..()
+	return ..()
 
 /atom/proc/move_camera_by_click()
 	if(istype(usr, /mob/living/silicon/ai))

code/modules/mob/freelook/ai/update_triggers.dm

@@ -59,7 +59,7 @@
 /obj/machinery/camera/Destroy()
 	clear_all_networks()
 	cameranet.cameras -= src
-	..()
+	return ..()
 
 // Mobs
 /mob/living/silicon/ai/rejuvenate()

code/modules/mob/freelook/eye.dm

@@ -38,7 +38,11 @@ mob/observer/eye/Destroy()
 		qdel(ghostimage)
 		ghostimage = null
 		updateallghostimages()
-	..()
+	if(owner)
+		if(owner.eyeobj == src)
+			owner.eyeobj = null
+		owner = null
+	. = ..()
 
 /mob/observer/eye/Move(n, direct)
 	if(owner == src)

code/modules/mob/freelook/mask/update_triggers.dm

@@ -25,7 +25,7 @@
 
 /mob/living/Destroy()
 	cultnet.updateVisibility(src, 0)
-	..()
+	return ..()
 
 /mob/living/rejuvenate()
 	var/was_dead = stat == DEAD

code/modules/mob/freelook/update_triggers.dm

@@ -15,7 +15,7 @@
 
 /turf/simulated/Destroy()
 	updateVisibility(src)
-	..()
+	return ..()
 
 /turf/simulated/New()
 	..()
@@ -26,7 +26,7 @@
 
 /obj/structure/Destroy()
 	updateVisibility(src)
-	..()
+	return ..()
 
 /obj/structure/New()
 	..()

code/modules/mob/freelook/visualnet.dm

@@ -14,7 +14,7 @@
 
 /datum/visualnet/Destroy()
 	visual_nets -= src
-	..()
+	return ..()
 
 // Checks if a chunk has been Generated in x, y, z.
 /datum/visualnet/proc/chunkGenerated(x, y, z)

code/modules/mob/holder.dm

@@ -27,7 +27,7 @@ var/list/holder_mob_icon_cache = list()
 
 /obj/item/weapon/holder/Destroy()
 	processing_objects.Remove(src)
-	..()
+	return ..()
 
 /obj/item/weapon/holder/process()
 	update_state()

code/modules/mob/living/silicon/ai/ai.dm

@@ -215,20 +215,15 @@ var/list/ai_verbs_hidden = list( // For why this exists, refer to https://xkcd.c
 /mob/living/silicon/ai/Destroy()
 	ai_list -= src
 
-	qdel(eyeobj)
-	eyeobj = null
-
-	qdel(psupply)
-	psupply = null
-
-	qdel(aiMulti)
-	aiMulti = null
-
-	qdel(aiRadio)
-	aiRadio = null
-
-	qdel(aiCamera)
-	aiCamera = null
+	qdel_null(announcement)
+	qdel_null(eyeobj)
+	qdel_null(psupply)
+	qdel_null(aiPDA)
+	qdel_null(aiCommunicator)
+	qdel_null(aiMulti)
+	qdel_null(aiRadio)
+	qdel_null(aiCamera)
+	hack = null
 
 	return ..()
 

code/modules/mob/living/silicon/silicon.dm

@@ -41,7 +41,7 @@
 	silicon_mob_list -= src
 	for(var/datum/alarm_handler/AH in alarm_manager.all_handlers)
 		AH.unregister_alarm(src)
-	..()
+	return ..()
 
 /mob/living/silicon/proc/init_id()
 	if(idcard)

code/modules/mob/living/simple_animal/simple_animal.dm

@@ -195,7 +195,7 @@
 	friends.Cut() //This one is not
 	walk_list.Cut()
 	languages.Cut()
-	..()
+	return ..()
 
 //Client attached
 /mob/living/simple_animal/Login()

code/modules/mob/mob_grab.dm

@@ -393,9 +393,6 @@
 /obj/item/weapon/grab/proc/size_difference(mob/A, mob/B)
 	return mob_size_difference(A.mob_size, B.mob_size)
 
-/obj/item/weapon/grab
-	var/destroying = 0
-
 /obj/item/weapon/grab/Destroy()
 	animate(affecting, pixel_x = 0, pixel_y = 0, 4, 1, LINEAR_EASING)
 	affecting.layer = 4
@@ -408,5 +405,4 @@
 		assailant = null
 	qdel(hud)
 	hud = null
-	destroying = 1 // stops us calling qdel(src) on dropped()
-	..()
+	return ..()

code/modules/mob/modifiers.dm

@@ -73,7 +73,7 @@
 
 /mob/living/Destroy()
 	remove_all_modifiers(TRUE)
-	..()
+	return ..()
 
 // Called by Life().
 /mob/living/proc/handle_modifiers()

code/modules/power/breaker_box.dm

@@ -20,7 +20,7 @@
 	var/update_locked = 0
 
 /obj/machinery/power/breakerbox/Destroy()
-	..()
+	. = ..()
 	for(var/datum/nano_module/rcon/R in world)
 		R.FindDevices()
 

code/modules/power/cable.dm

@@ -108,7 +108,7 @@ var/list/possible_cable_coil_colours = list(
 	if(powernet)
 		cut_cable_from_powernet()				// update the powernets
 	cable_list -= src							//remove it from global cable list
-	..()										// then go ahead and delete the cable
+	return ..()									// then go ahead and delete the cable
 
 // Ghost examining the cable -> tells him the power
 /obj/structure/cable/attack_ghost(mob/user)

code/modules/power/grid_checker.dm

@@ -28,7 +28,7 @@
 /obj/machinery/power/grid_checker/Destroy()
 	qdel(wires)
 	wires = null
-	..()
+	return ..()
 
 /obj/machinery/power/grid_checker/update_icon()
 	if(power_failing)

code/modules/power/lighting.dm

@@ -268,7 +268,7 @@
 	if(A)
 		on = 0
 //		A.update_lights()
-	..()
+	return ..()
 
 /obj/machinery/light/update_icon()
 

code/modules/power/power.dm

@@ -19,7 +19,7 @@
 	disconnect_from_network()
 	disconnect_terminal()
 
-	..()
+	return ..()
 
 ///////////////////////////////
 // General procedures

code/modules/power/singularity/collector.dm

@@ -23,7 +23,7 @@ var/global/list/rad_collectors = list()
 
 /obj/machinery/power/rad_collector/Destroy()
 	rad_collectors -= src
-	..()
+	return ..()
 
 /obj/machinery/power/rad_collector/process()
 	//so that we don't zero out the meter if the SM is processed first.

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm

@@ -205,7 +205,7 @@
 	if(holder && holder.my_atom && ismob(holder.my_atom))
 		var/mob/M = holder.my_atom
 		M.status_flags &= ~FAKEDEATH
-	..()
+	return ..()
 
 /datum/reagent/toxin/fertilizer //Reagents used for plant fertilizers.
 	name = "fertilizer"

code/modules/tables/update_triggers.dm

@@ -6,12 +6,10 @@
 
 /obj/structure/window/Destroy()
 	var/oldloc = loc
-	loc=null
+	. = ..()
 	for(var/obj/structure/table/T in view(oldloc, 1))
 		T.update_connections()
 		T.update_icon()
-	loc=oldloc
-	..()
 
 /obj/structure/window/Move()
 	var/oldloc = loc