all else

code/__DEFINES/_flags/_flags.dm

@@ -30,46 +30,46 @@ GLOBAL_LIST_INIT(bitflags, list(
 
 //FLAGS BITMASK
 ///This flag is what recursive_hear_check() uses to determine wether to add an item to the hearer list or not.
-#define HEAR_1						(1<<3)
+#define HEAR_1						(1<<0)
 ///Projectiles will use default chance-based ricochet handling on things with this.
-#define DEFAULT_RICOCHET_1			(1<<4)
+#define DEFAULT_RICOCHET_1			(1<<1)
 ///Conducts electricity (metal etc.).
-#define CONDUCT_1					(1<<5)
+#define CONDUCT_1					(1<<2)
 ///For machines and structures that should not break into parts, eg, holodeck stuff.
-#define NODECONSTRUCT_1				(1<<7)
+#define NODECONSTRUCT_1				(1<<3)
 ///Atom queued to SSoverlay.
-#define OVERLAY_QUEUED_1			(1<<8)
+#define OVERLAY_QUEUED_1			(1<<4)
 ///Item has priority to check when entering or leaving.
-#define ON_BORDER_1					(1<<9)
+#define ON_BORDER_1					(1<<5)
 ///Whether or not this atom shows screentips when hovered over
-#define NO_SCREENTIPS_1				(1<<10)
+#define NO_SCREENTIPS_1				(1<<6)
 ///Prevent clicking things below it on the same turf eg. doors/ fulltile windows.
-#define PREVENT_CLICK_UNDER_1		(1<<11)
-#define HOLOGRAM_1					(1<<12)
+#define PREVENT_CLICK_UNDER_1		(1<<7)
+#define HOLOGRAM_1					(1<<8)
 ///Prevents mobs from getting chainshocked by teslas and the supermatter.
-#define SHOCKED_1 					(1<<13)
+#define SHOCKED_1 					(1<<9)
 ///Whether /atom/Initialize() has already run for the object.
-#define INITIALIZED_1				(1<<14)
+#define INITIALIZED_1				(1<<10)
 ///was this spawned by an admin? used for stat tracking stuff.
-#define ADMIN_SPAWNED_1				(1<<15)
+#define ADMIN_SPAWNED_1				(1<<11)
 /// should not get harmed if this gets caught by an explosion?
-#define PREVENT_CONTENTS_EXPLOSION_1 (1<<16)
+#define PREVENT_CONTENTS_EXPLOSION_1 (1<<12)
 /// Early returns mob.face_atom()
-#define BLOCK_FACE_ATOM_1			(1<<17)
+#define BLOCK_FACE_ATOM_1			(1<<13)
 
 //turf-only flags
-#define NOJAUNT_1 (1<<0)
-#define UNUSED_RESERVATION_TURF_1 (1<<1)
+#define NOJAUNT_1 (1<<14)
+#define UNUSED_RESERVATION_TURF_1 (1<<15)
 /// If a turf can be made dirty at roundstart. This is also used in areas.
-#define CAN_BE_DIRTY_1 (1<<2)
+#define CAN_BE_DIRTY_1 (1<<16)
 /// Blocks lava rivers being generated on the turf
-#define NO_LAVA_GEN_1 (1<<6)
+#define NO_LAVA_GEN_1 (1<<17)
 /// Blocks ruins spawning on the turf
-#define NO_RUINS_1 (1<<10)
+#define NO_RUINS_1 (1<<18)
 /// Should this tile be cleaned up and reinserted into an excited group?
-#define EXCITED_CLEANUP_1 (1 << 13)
+#define EXCITED_CLEANUP_1 (1 << 19)
 /// Whether or not this atom has contextual screentips when hovered OVER
-#define HAS_CONTEXTUAL_SCREENTIPS_1 (1 << 14)
+#define HAS_CONTEXTUAL_SCREENTIPS_1 (1 << 20)
 
 ////////////////Area flags\\\\\\\\\\\\\\
 /// If it's a valid territory for cult summoning or the CRAB-17 phone to spawn

code/__DEFINES/cooldowns.dm

@@ -78,7 +78,7 @@
 
 #define COOLDOWN_DECLARE(cd_index) var/##cd_index = 0
 
-#define COOLDOWN_START(cd_source, cd_index, cd_time) (cd_source.cd_index = world.time + cd_time)
+#define COOLDOWN_START(cd_source, cd_index, cd_time) (cd_source.cd_index = world.time + (cd_time))
 
 //Returns true if the cooldown has run its course, false otherwise
 #define COOLDOWN_FINISHED(cd_source, cd_index) (cd_source.cd_index < world.time)

code/__DEFINES/qdel.dm

@@ -40,6 +40,6 @@
 #define GC_DEL_QUEUE 10 SECONDS
 
 #define QDELING(X) (X.gc_destroyed)
-#define QDELETED(X) (!X || QDELING(X))
+#define QDELETED(X) (isnull(X) || QDELING(X))
 #define QDESTROYING(X) (!X || X.gc_destroyed == GC_CURRENTLY_BEING_QDELETED)
 

code/__DEFINES/subsystems.dm

@@ -87,6 +87,9 @@
 ///Call qdel on the atom after intialization
 #define INITIALIZE_HINT_QDEL 2
 
+//Call qdel with a force of TRUE after initialization
+#define INITIALIZE_HINT_QDEL_FORCE 3
+
 ///type and all subtypes should always immediately call Initialize in New()
 #define INITIALIZE_IMMEDIATE(X) ##X/New(loc, ...){\
 	..();\

code/__HELPERS/do_after.dm

@@ -185,7 +185,8 @@
 	while (world.time + resume_time < endtime)
 		stoplag(1)
 		if (progress)
-			progbar.update(world.time - starttime + resume_time)
+			if(!QDELETED(progbar))
+				progbar.update(world.time - starttime + resume_time)
 		if(QDELETED(user) || QDELETED(target))
 			. = 0
 			break
@@ -264,7 +265,8 @@
 	while (world.time + resume_time < endtime)
 		stoplag(1)
 		if (progress)
-			progbar.update(world.time - starttime + resume_time)
+			if(!QDELETED(progbar))
+				progbar.update(world.time - starttime + resume_time)
 
 		if(drifting && !user.inertia_dir)
 			drifting = 0
@@ -339,7 +341,8 @@
 		while(world.time < endtime)
 			stoplag(1)
 			if(progress)
-				progbar.update(world.time - starttime)
+				if(!QDELETED(progbar))
+					progbar.update(world.time - starttime)
 			if(QDELETED(user) || !targets)
 				. = 0
 				break

code/_compile_options.dm

@@ -89,6 +89,7 @@
 #define REFERENCE_TRACKING
 #define REFERENCE_TRACKING_DEBUG
 #define FIND_REF_NO_CHECK_TICK
+// #define GC_FAILURE_HARD_LOOKUP // Uncomment this to have harddel reftracking in unit tests (takes 3-5min to run per single harddel)
 #endif
 
 #ifdef TGS

code/_onclick/hud/credits.dm

@@ -55,14 +55,15 @@
 	animate(src, alpha = 255, time = CREDIT_EASE_DURATION, flags = ANIMATION_PARALLEL)
 	addtimer(CALLBACK(src, .proc/FadeOut), CREDIT_ROLL_SPEED - CREDIT_EASE_DURATION)
 	QDEL_IN(src, CREDIT_ROLL_SPEED)
-	P.screen += src
+	if(parent)
+		parent.screen += src
 
 /atom/movable/screen/credit/Destroy()
-	var/client/P = parent
-	P.screen -= src
 	icon = null
-	LAZYREMOVE(P.credits, src)
-	parent = null
+	if(parent)
+		parent.screen -= src
+		LAZYREMOVE(parent.credits, src)
+		parent = null
 	return ..()
 
 /atom/movable/screen/credit/proc/FadeOut()

code/_onclick/hud/radial.dm

@@ -9,6 +9,17 @@ GLOBAL_LIST_EMPTY(radial_menus)
 	plane = ABOVE_HUD_PLANE
 	var/datum/radial_menu/parent
 
+/atom/movable/screen/radial/proc/set_parent(new_value)
+	if(parent)
+		UnregisterSignal(parent, COMSIG_PARENT_QDELETING)
+	parent = new_value
+	if(parent)
+		RegisterSignal(parent, COMSIG_PARENT_QDELETING, .proc/handle_parent_del)
+
+/atom/movable/screen/radial/proc/handle_parent_del()
+	SIGNAL_HANDLER
+	set_parent(null)
+
 /atom/movable/screen/radial/slice
 	icon_state = "radial_slice"
 	var/choice
@@ -124,7 +135,7 @@ GLOBAL_LIST_EMPTY(radial_menus)
 		for(var/i in 1 to elements_to_add) //Create all elements
 			var/atom/movable/screen/radial/slice/new_element = new /atom/movable/screen/radial/slice
 			new_element.tooltips = use_tooltips
-			new_element.parent = src
+			new_element.set_parent(src)
 			elements += new_element
 
 	var/page = 1
@@ -210,7 +221,7 @@ GLOBAL_LIST_EMPTY(radial_menus)
 
 /datum/radial_menu/New()
 	close_button = new
-	close_button.parent = src
+	close_button.set_parent(src)
 
 /datum/radial_menu/proc/Reset()
 	choices.Cut()

code/_onclick/hud/robot.dm

@@ -302,8 +302,9 @@
 		icon_state = "lamp_off"
 
 /atom/movable/screen/robot/lamp/Destroy()
-	robot.lampButton = null
-	robot = null
+	if(robot)
+		robot.lampButton = null
+		robot = null
 	return ..()
 
 /atom/movable/screen/robot/alerts
@@ -343,8 +344,9 @@
 	var/mob/living/silicon/robot/robot
 
 /atom/movable/screen/robot/modPC/Destroy()
-	robot.interfaceButton = null
-	robot = null
+	if(robot)
+		robot.interfaceButton = null
+		robot = null
 	return ..()
 
 /atom/movable/screen/robot/modPC/Click()

code/controllers/subsystem/atoms.dm

@@ -97,6 +97,9 @@ SUBSYSTEM_DEF(atoms)
 			if(INITIALIZE_HINT_QDEL)
 				qdel(A)
 				qdeleted = TRUE
+			if(INITIALIZE_HINT_QDEL_FORCE)
+				qdel(A, force = TRUE)
+				qdeleted = TRUE
 			else
 				BadInitializeCalls[the_type] |= BAD_INIT_NO_HINT
 

code/controllers/subsystem/jukeboxes.dm

@@ -74,6 +74,8 @@ SUBSYSTEM_DEF(jukeboxes)
 			activejukeboxes[IDtoupdate][JUKE_FALLOFF] = jukefalloff
 
 /datum/controller/subsystem/jukeboxes/proc/removejukebox(IDtoremove)
+	if(!IDtoremove)
+		return
 	if(islist(activejukeboxes[IDtoremove]))
 		var/jukechannel = activejukeboxes[IDtoremove][JUKE_CHANNEL]
 		for(var/mob/M in GLOB.player_list)

code/controllers/subsystem/persistence/_persistence.dm

@@ -335,7 +335,7 @@ SUBSYSTEM_DEF(persistence)
 		if(!istype(ending_human) || !ending_human.mind || !ending_human.client || !ending_human.client.prefs || !ending_human.client.prefs.persistent_scars)
 			continue
 
-		var/mob/living/carbon/human/original_human = ending_human.mind.original_character
+		var/mob/living/carbon/human/original_human = ending_human.mind.original_character.resolve()
 		if(!original_human || original_human.stat == DEAD || !original_human.all_scars || !(original_human == ending_human))
 			if(ending_human.client) // i was told if i don't check this every step of the way byond might decide a client ceases to exist mid proc so here we go
 				ending_human.client.prefs.scars_list["[ending_human.client.prefs.scars_index]"] = ""
@@ -356,7 +356,7 @@ SUBSYSTEM_DEF(persistence)
 		if(!istype(ending_human) || !ending_human.mind || !ending_human.client || !ending_human.client.prefs || !ending_human.client.prefs.tcg_cards)
 			continue
 
-		var/mob/living/carbon/human/original_human = ending_human.mind.original_character
+		var/mob/living/carbon/human/original_human = ending_human.mind.original_character.resolve()
 		if(!original_human || original_human.stat == DEAD || !(original_human == ending_human))
 			continue
 

code/datums/action.dm

@@ -648,6 +648,7 @@
 /datum/action/spell_action/Destroy()
 	var/obj/effect/proc_holder/S = target
 	S.action = null
+	target = null
 	return ..()
 
 /datum/action/spell_action/Trigger()

code/datums/brain_damage/imaginary_friend.dm

@@ -87,6 +87,8 @@
 		to_chat(src, "<span class='notice'>You cannot directly influence the world around you, but you can see what [owner] cannot.</span>")
 
 /mob/camera/imaginary_friend/Initialize(mapload, _trauma)
+	if(!_trauma)
+		return INITIALIZE_HINT_QDEL
 	. = ..()
 
 	trauma = _trauma
@@ -129,7 +131,7 @@
 	client.images |= current_image
 
 /mob/camera/imaginary_friend/Destroy()
-	if(owner.client)
+	if(owner?.client)
 		owner.client.images.Remove(human_image)
 	if(client)
 		client.images.Remove(human_image)

code/datums/components/mood.dm

@@ -43,6 +43,7 @@
 		hud.show_hud(hud.hud_version)
 
 /datum/component/mood/Destroy()
+	QDEL_LIST_ASSOC_VAL(mood_events)
 	STOP_PROCESSING(SSobj, src)
 	unmodify_hud()
 	return ..()

code/datums/components/pellet_cloud.dm

@@ -266,7 +266,7 @@
 			var/w_bonus = wound_info_by_part[hit_part][CLOUD_POSITION_W_BONUS]
 			var/bw_bonus = wound_info_by_part[hit_part][CLOUD_POSITION_BW_BONUS]
 			var/wound_type = (initial(P.damage_type) == BRUTE) ? WOUND_BLUNT : WOUND_BURN // sharpness is handled in the wound rolling
-			wound_info_by_part[hit_part] = null
+			wound_info_by_part -= hit_part
 			hit_part.painless_wound_roll(wound_type, damage_dealt, w_bonus, bw_bonus, initial(P.sharpness))
 
 		if(num_hits > 1)

code/datums/components/squeak.dm

@@ -111,7 +111,7 @@
 	if(AM.movement_type & (FLYING|FLOATING) || !AM.has_gravity())
 		return
 	var/atom/current_parent = parent
-	if(isturf(current_parent.loc))
+	if(isturf(current_parent?.loc))
 		if(do_play_squeak())
 			SEND_SIGNAL(AM, COMSIG_CROSS_SQUEAKED)
 

code/datums/components/tackle.dm

@@ -49,7 +49,7 @@
 	var/mob/living/carbon/P = parent
 	to_chat(P, "<span class='notice'>You can no longer tackle.</span>")
 	P.tackling = FALSE
-	..()
+	return ..()
 
 /datum/component/tackler/RegisterWithParent()
 	RegisterSignal(parent, COMSIG_MOB_CLICKON, .proc/checkTackle)

code/datums/dash_weapon.dm

@@ -19,6 +19,10 @@
 	dashing_item = dasher
 	holder = user
 
+/datum/action/innate/dash/Destroy()
+	dashing_item = null
+	return ..()
+
 /datum/action/innate/dash/IsAvailable(silent = FALSE)
 	if(current_charges > 0)
 		return TRUE

code/datums/elements/dwarfism.dm

@@ -31,6 +31,8 @@
 
 /datum/element/dwarfism/Detach(mob/living/L)
 	. = ..()
+	attached_targets -= L
+	UnregisterSignal(L, comsig)
 	if(QDELETED(L))
 		return
 	if(L.lying != 0)
@@ -39,8 +41,6 @@
 	else
 		L.transform = L.transform.Scale(1, TALL)
 		L.transform = L.transform.Translate(0, 16*(TALL-1)) //Makes sure you stand on the tile no matter the size - sand
-	UnregisterSignal(L, comsig)
-	attached_targets -= L
 
 #undef SHORT
 #undef TALL

code/datums/elements/spellcasting.dm

@@ -24,6 +24,7 @@
 	UnregisterSignal(target, list(COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED, COMSIG_MOB_SPELL_CAN_CAST))
 	if(users_by_item[target])
 		var/mob/user = users_by_item[target]
+		users_by_item -= target
 		stacked_spellcasting_by_user[user]--
 		if(!stacked_spellcasting_by_user[user])
 			stacked_spellcasting_by_user -= user

code/datums/explosion.dm

@@ -205,8 +205,8 @@ GLOBAL_LIST_EMPTY(explosions)
 	//lists are guaranteed to contain at least 1 turf at this point
 
 	var/iteration = 0
-	var/affTurfLen = affected_turfs.len
-	var/expBlockLen = cached_exp_block.len
+	var/affTurfLen = length(affected_turfs)
+	var/expBlockLen = length(cached_exp_block)
 	for(var/TI in affected_turfs)
 		var/turf/T = TI
 		++iteration
@@ -282,8 +282,8 @@ GLOBAL_LIST_EMPTY(explosions)
 				break
 
 			//update the trackers
-			affTurfLen = affected_turfs.len
-			expBlockLen = cached_exp_block.len
+			affTurfLen = length(affected_turfs)
+			expBlockLen = length(cached_exp_block)
 
 			if(break_condition)
 				if(reactionary)
@@ -299,8 +299,8 @@ GLOBAL_LIST_EMPTY(explosions)
 					break
 
 				//update the trackers
-				affTurfLen = affected_turfs.len
-				expBlockLen = cached_exp_block.len
+				affTurfLen = length(affected_turfs)
+				expBlockLen = length(cached_exp_block)
 
 			var/circumference = (PI * (init_dist + 4) * 2) //+4 to radius to prevent shit gaps
 			if(exploded_this_tick.len > circumference)	//only do this every revolution
@@ -357,7 +357,7 @@ GLOBAL_LIST_EMPTY(explosions)
 	var/processed = 0
 	while(running)
 		var/I
-		for(I in (processed + 1) to affected_turfs.len) // we cache the explosion block rating of every turf in the explosion area
+		for(I in (processed + 1) to length(affected_turfs)) // we cache the explosion block rating of every turf in the explosion area
 			var/turf/T = affected_turfs[I]
 			var/current_exp_block = T.density ? T.explosion_block : 0
 

code/datums/mind.dm

@@ -80,8 +80,8 @@
 	var/list/ambitions
 //ambition end
 
-	///What character we spawned in as- either at roundstart or latejoin, so we know for persistent scars if we ended as the same person or not
-	var/mob/original_character
+	///Weakref to the character we spawned in as- either at roundstart or latejoin, so we know for persistent scars if we ended as the same person or not
+	var/datum/weakref/original_character
 
 	/// A lazy list of statuses to add next to this mind in the traitor panel
 	var/list/special_statuses
@@ -101,8 +101,26 @@
 				qdel(i)
 		antag_datums = null
 	QDEL_NULL(skill_holder)
+	set_current(null)
+	soulOwner = null
 	return ..()
 
+/datum/mind/proc/set_current(mob/new_current)
+	if(new_current && QDELETED(new_current))
+		CRASH("Tried to set a mind's current var to a qdeleted mob, what the fuck")
+	if(current)
+		UnregisterSignal(src, COMSIG_PARENT_QDELETING)
+	current = new_current
+	if(current)
+		RegisterSignal(src, COMSIG_PARENT_QDELETING, PROC_REF(clear_current))
+
+/datum/mind/proc/clear_current(datum/source)
+	SIGNAL_HANDLER
+	set_current(null)
+
+/datum/mind/proc/set_original_character(new_original_character)
+	original_character = WEAKREF(new_original_character)
+
 /datum/mind/proc/get_language_holder()
 	if(!language_holder)
 		language_holder = new (src)
@@ -125,13 +143,13 @@
 		key = new_character.key
 
 	if(new_character.mind)								//disassociate any mind currently in our new body's mind variable
-		new_character.mind.current = null
+		new_character.mind.set_current(null)
 
 	var/datum/atom_hud/antag/hud_to_transfer = antag_hud//we need this because leave_hud() will clear this list
 	var/mob/living/old_current = current
 	if(current)
 		current.transfer_observers_to(new_character)	//transfer anyone observing the old character to the new one
-	current = new_character								//associate ourself with our new body
+	set_current(new_character)								//associate ourself with our new body
 	new_character.mind = src							//and associate our new body with ourself
 	for(var/a in antag_datums)	//Makes sure all antag datums effects are applied in the new body
 		var/datum/antagonist/A = a
@@ -1704,7 +1722,7 @@ GLOBAL_LIST(objective_choices)
 		SEND_SIGNAL(src, COMSIG_MOB_ON_NEW_MIND)
 	if(!mind.name)
 		mind.name = real_name
-	mind.current = src
+	mind.set_current(src)
 	mind.hide_ckey = client?.prefs?.hide_ckey
 
 /mob/living/carbon/mind_initialize()

code/datums/mood_events/mood_event.dm

@@ -11,6 +11,7 @@
 
 /datum/mood_event/Destroy()
 	remove_effects()
+	owner = null
 	return ..()
 
 /datum/mood_event/proc/add_effects(param)

code/datums/mutations/antenna.dm

@@ -15,7 +15,7 @@
 	icon_state = "walkietalkie"
 
 /obj/item/implant/radio/antenna/Initialize(mapload)
-	..()
+	. = ..()
 	if (radio)
 		radio.name = "internal antenna"
 

code/game/atoms.dm

@@ -245,7 +245,7 @@
 			AA.remove_from_hud(src)
 
 	if(reagents)
-		qdel(reagents)
+		QDEL_NULL(reagents)
 
 	orbiters = null // The component is attached to us normaly and will be deleted elsewhere
 

code/game/machinery/_machinery.dm

@@ -175,6 +175,8 @@ Class Procs:
 		for(var/atom/A in component_parts)
 			qdel(A)
 		component_parts.Cut()
+	if(circuit)
+		QDEL_NULL(circuit)
 	return ..()
 
 /obj/machinery/proc/locate_machinery()
@@ -454,6 +456,7 @@ Class Procs:
 			for(var/obj/item/I in component_parts)
 				I.forceMove(loc)
 			LAZYCLEARLIST(component_parts)
+			circuit = null
 	qdel(src)
 
 /obj/machinery/proc/spawn_frame(disassembled)

code/game/machinery/cryopod.dm

@@ -440,7 +440,8 @@ GLOBAL_LIST_EMPTY(cryopod_computers)
 	else
 		if(ishuman(mob_occupant))
 			var/mob/living/carbon/human/H = mob_occupant
-			if(H.mind && H.client && H.client.prefs && H == H.mind.original_character)
+			var/mob/living/carbon/human/H_original_caharcter = H.mind.original_character.resolve()
+			if(H.mind && H.client && H.client.prefs && H == H_original_caharcter)
 				H.SaveTCGCards()
 
 		var/list/gear = list()

code/game/machinery/launch_pad.dm

@@ -39,9 +39,10 @@
 	MA.plane = 0
 	holder.appearance = MA
 	update_indicator()
-	
+
 /obj/machinery/launchpad/Destroy()
-	qdel(hud_list[DIAG_LAUNCHPAD_HUD])
+	for(var/datum/atom_hud/data/diagnostic/diag_hud in GLOB.huds)
+		diag_hud.remove_from_hud(src)
 	return ..()
 
 /obj/machinery/launchpad/examine(mob/user)
@@ -229,7 +230,9 @@
     src.briefcase = briefcase
 
 /obj/machinery/launchpad/briefcase/Destroy()
-	QDEL_NULL(briefcase)
+	if(!QDELETED(briefcase))
+		qdel(briefcase)
+	briefcase = null
 	return ..()
 
 /obj/machinery/launchpad/briefcase/isAvailable(silent = FALSE)
@@ -271,7 +274,8 @@
 
 /obj/item/storage/briefcase/launchpad/Destroy()
 	if(!QDELETED(pad))
-		QDEL_NULL(pad)
+		qdel(pad)
+	pad = null
 	return ..()
 
 /obj/item/storage/briefcase/launchpad/PopulateContents()

code/game/machinery/navbeacon.dm

@@ -26,20 +26,13 @@
 
 	set_codes()
 
+	glob_lists_register(init=TRUE)
+
 	var/turf/T = loc
 	hide(T.intact)
-	if(codes["patrol"])
-		if(!GLOB.navbeacons["[z]"])
-			GLOB.navbeacons["[z]"] = list()
-		GLOB.navbeacons["[z]"] += src //Register with the patrol list!
-	if(codes["delivery"])
-		GLOB.deliverybeacons += src
-		GLOB.deliverybeacontags += location
 
 /obj/machinery/navbeacon/Destroy()
-	if (GLOB.navbeacons["[z]"])
-		GLOB.navbeacons["[z]"] -= src //Remove from beacon list, if in one.
-	GLOB.deliverybeacons -= src
+	glob_lists_deregister()
 	return ..()
 
 /obj/machinery/navbeacon/onTransitZ(old_z, new_z)
@@ -67,6 +60,26 @@
 		else
 			codes[e] = "1"
 
+/obj/machinery/navbeacon/proc/glob_lists_deregister()
+	if (GLOB.navbeacons["[z]"])
+		GLOB.navbeacons["[z]"] -= src //Remove from beacon list, if in one.
+	GLOB.deliverybeacons -= src
+	GLOB.deliverybeacontags -= location
+
+///Registers the navbeacon to the global beacon lists
+/obj/machinery/navbeacon/proc/glob_lists_register(init=FALSE)
+	if(!init)
+		glob_lists_deregister()
+	if(!codes)
+		return
+	if(codes["patrol"])
+		if(!GLOB.navbeacons["[z]"])
+			GLOB.navbeacons["[z]"] = list()
+		GLOB.navbeacons["[z]"] += src //Register with the patrol list!
+	if(codes["delivery"])
+		GLOB.deliverybeacons += src
+		GLOB.deliverybeacontags += location
+
 
 // called when turf state changes
 // hide the object if turf is intact

code/game/machinery/suit_storage_unit.dm

@@ -232,6 +232,7 @@
 	QDEL_NULL(shoes)
 	QDEL_NULL(mod)
 	QDEL_NULL(storage)
+	QDEL_NULL(wires)
 	return ..()
 
 /obj/machinery/suit_storage_unit/update_overlays()

code/game/machinery/telecomms/telecomunications.dm

@@ -97,7 +97,7 @@ GLOBAL_LIST_EMPTY(telecomms_list)
 /obj/machinery/telecomms/proc/add_link(obj/machinery/telecomms/T)
 	var/turf/position = get_turf(src)
 	var/turf/T_position = get_turf(T)
-	if((position.z == T_position.z) || (long_range_link && T.long_range_link))
+	if((position?.z == T_position?.z) || (long_range_link && T.long_range_link))
 		if(src != T)
 			for(var/x in autolinkers)
 				if(x in T.autolinkers)

code/game/objects/effects/anomalies.dm

@@ -57,7 +57,7 @@
 /obj/effect/anomaly/Destroy()
 	GLOB.poi_list.Remove(src)
 	STOP_PROCESSING(SSobj, src)
-	qdel(countdown)
+	QDEL_NULL(countdown)
 	if(aSignal)
 		QDEL_NULL(aSignal)
 	return ..()

code/game/objects/effects/decals/crayon.dm

@@ -81,4 +81,4 @@ GLOBAL_LIST(gang_tags)
 
 /obj/effect/decal/cleanable/crayon/gang/Destroy()
 	LAZYREMOVE(GLOB.gang_tags, src)
-	..()
+	return ..()

code/game/objects/effects/landmarks.dm

@@ -43,12 +43,12 @@ INITIALIZE_IMMEDIATE(/obj/effect/landmark)
 		qdel(src)
 
 /obj/effect/landmark/start/Initialize(mapload)
+	. = ..()
 	GLOB.start_landmarks_list += src
 	if(jobspawn_override)
 		if(!GLOB.jobspawn_overrides[name])
 			GLOB.jobspawn_overrides[name] = list()
 		GLOB.jobspawn_overrides[name] += src
-	..()
 	if(name != "start")
 		tag = "start*[name]"
 

code/game/objects/items.dm

@@ -209,6 +209,7 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 			LAZYADD(used_skills[path], S.skill_traits)
 
 /obj/item/Destroy()
+	master = null
 	item_flags &= ~DROPDEL	//prevent reqdels
 	if(ismob(loc))
 		var/mob/m = loc

code/game/objects/items/cards_ids.dm

@@ -783,6 +783,7 @@
 
 /obj/item/card/id/departmental_budget/Destroy()
 	SSeconomy.dep_cards -= src
+	registered_account.bank_cards -= src
 	return ..()
 
 /obj/item/card/id/departmental_budget/update_label()

code/game/objects/items/chrono_eraser.dm

@@ -130,6 +130,11 @@
 	if(istype(C))
 		gun = C.gun
 
+/obj/item/projectile/energy/chrono_beam/Destroy()
+	gun = null
+	return ..()
+
+
 /obj/item/projectile/energy/chrono_beam/on_hit(atom/target)
 	if(target && gun && isliving(target))
 		var/obj/effect/chrono_field/F = new(target.loc, target, gun)
@@ -148,7 +153,9 @@
 		gun = loc
 	. = ..()
 
-
+/obj/item/ammo_casing/energy/chrono_beam/Destroy()
+	gun = null
+	return ..()
 
 
 

code/game/objects/items/crab17.dm

@@ -81,6 +81,14 @@
 	addtimer(CALLBACK(src, .proc/startUp), 50)
 	QDEL_IN(src, 8 MINUTES) //Self destruct after 8 min
 
+/obj/structure/checkoutmachine/Destroy()
+	bogdanoff = null
+	stop_dumping()
+	STOP_PROCESSING(SSfastprocess, src)
+	priority_announce("The credit deposit machine at [get_area(src)] has been destroyed. Station funds have stopped draining!", sender_override = "CRAB-17 Protocol")
+	explosion(src, 0,0,1, flame_range = 2)
+	return ..()
+
 
 /obj/structure/checkoutmachine/proc/startUp() //very VERY snowflake code that adds a neat animation when the pod lands.
 	start_dumping() //The machine doesnt move during this time, giving people close by a small window to grab their funds before it starts running around
@@ -145,13 +153,6 @@
 	canwalk = TRUE
 	START_PROCESSING(SSfastprocess, src)
 
-/obj/structure/checkoutmachine/Destroy()
-	stop_dumping()
-	STOP_PROCESSING(SSfastprocess, src)
-	priority_announce("The credit deposit machine at [get_area(src)] has been destroyed. Station funds have stopped draining!", sender_override = "CRAB-17 Protocol")
-	explosion(src, 0,0,1, flame_range = 2)
-	return ..()
-
 /obj/structure/checkoutmachine/proc/start_dumping()
 	accounts_to_rob = SSeconomy.bank_accounts.Copy()
 	accounts_to_rob -= bogdanoff.get_bank_account()
@@ -220,7 +221,10 @@
 	playsound(src,  'sound/weapons/mortar_whistle.ogg', 70, TRUE, 6)
 	addtimer(CALLBACK(src, .proc/endLaunch), 5, TIMER_CLIENT_TIME) //Go onto the last step after a very short falling animation
 
-
+/obj/effect/dumpeetTarget/Destroy()
+	dump = null
+	bogdanoff = null
+	return ..()
 
 /obj/effect/dumpeetTarget/proc/endLaunch()
 	QDEL_NULL(DF) //Delete the falling machine effect, because at this point its animation is over. We dont use temp_visual because we want to manually delete it as soon as the pod appears

code/game/objects/items/devices/chameleonproj.dm

@@ -175,5 +175,7 @@
 	return
 
 /obj/effect/dummy/chameleon/Destroy()
-	master.disrupt(0)
+	if(master)
+		master.disrupt(0)
+		master = null
 	return ..()

code/game/objects/items/devices/forcefieldprojector.dm

@@ -98,8 +98,9 @@
 /obj/structure/projected_forcefield/Destroy()
 	visible_message("<span class='warning'>[src] flickers and disappears!</span>")
 	playsound(src,'sound/weapons/resonator_blast.ogg',25,1)
-	generator.current_fields -= src
-	generator = null
+	if(generator)
+		generator.current_fields -= src
+		generator = null
 	return ..()
 
 /obj/structure/projected_forcefield/play_attack_sound(damage_amount, damage_type = BRUTE, damage_flag = 0)
@@ -108,4 +109,5 @@
 /obj/structure/projected_forcefield/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
 	if(sound_effect)
 		play_attack_sound(damage_amount, damage_type, damage_flag)
-	generator.shield_integrity = max(generator.shield_integrity - damage_amount, 0)
+	if(generator)
+		generator.shield_integrity = max(generator.shield_integrity - damage_amount, 0)

code/game/objects/items/devices/radio/headset.dm

@@ -270,10 +270,6 @@ GLOBAL_LIST_INIT(channel_tokens, list(
 	name = "\proper mini Integrated Subspace Transceiver "
 	subspace_transmission = FALSE
 
-/obj/item/radio/headset/silicon/pai/ComponentInitialize()
-	. = ..()
-	AddElement(/datum/element/empprotection, EMP_PROTECT_WIRES)
-
 /obj/item/radio/headset/silicon/pai/emp_act(severity)
 	. = ..()
 	return EMP_PROTECT_SELF

code/game/objects/items/devices/transfer_valve.dm

@@ -19,6 +19,23 @@
 /obj/item/transfer_valve/IsAssemblyHolder()
 	return TRUE
 
+/obj/item/transfer_valve/Destroy()
+	attached_device = null
+	QDEL_NULL(tank_one)
+	QDEL_NULL(tank_two)
+	return ..()
+
+/obj/item/transfer_valve/handle_atom_del(atom/deleted_atom)
+	. = ..()
+	if(deleted_atom == tank_one)
+		tank_one = null
+		update_appearance()
+		return
+	if(deleted_atom == tank_two)
+		tank_two = null
+		update_appearance()
+		return
+
 /obj/item/transfer_valve/attackby(obj/item/item, mob/user, params)
 	if(istype(item, /obj/item/tank))
 		if(tank_one && tank_two)

code/game/objects/items/grenades/clusterbuster.dm

@@ -70,7 +70,8 @@
 /////////////////////////////////
 /obj/effect/payload_spawner/Initialize(mapload, type, numspawned)
 	..()
-	spawn_payload(type, numspawned)
+	if(type && isnum(numspawned))
+		spawn_payload(type, numspawned)
 	return INITIALIZE_HINT_QDEL
 
 /obj/effect/payload_spawner/proc/spawn_payload(type, numspawned)

code/game/objects/items/grenades/plastic.dm

@@ -33,7 +33,7 @@
 	qdel(nadeassembly)
 	nadeassembly = null
 	target = null
-	..()
+	return ..()
 
 /obj/item/grenade/plastic/attackby(obj/item/I, mob/user, params)
 	if(!nadeassembly && istype(I, /obj/item/assembly_holder))

code/game/objects/items/melee/energy.dm

@@ -332,6 +332,10 @@
 	spark_system.set_up(5, 0, src)
 	spark_system.attach(src)
 
+/obj/item/melee/transforming/energy/blade/Destroy()
+	QDEL_NULL(spark_system)
+	. = ..()
+
 /obj/item/melee/transforming/energy/blade/transform_weapon(mob/living/user, supress_message_text)
 	return
 

code/game/objects/items/plushes.dm

@@ -467,7 +467,7 @@ GLOBAL_LIST_INIT(valid_plushie_paths, valid_plushie_paths())
 	can_random_spawn = FALSE
 
 /obj/item/toy/plush/random/Initialize(mapload)
-	..()
+	. = ..()
 	var/newtype
 	var/list/snowflake_list = CONFIG_GET(keyed_list/snowflake_plushies)
 

code/game/objects/items/religion.dm

@@ -294,19 +294,13 @@
 	name = "Crusader's Armour Set" //i can't into ck2 references
 	desc = "This armour is said to be based on the armor of kings on another world thousands of years ago, who tended to assassinate, conspire, and plot against everyone who tried to do the same to them.  Some things never change."
 
-/obj/item/storage/box/itemset/crusader/blue/New()
-	..()
-	contents = list()
-	sleep(1)
+/obj/item/storage/box/itemset/crusader/blue/PopulateContents()
 	new /obj/item/clothing/suit/armor/plate/crusader/blue(src)
 	new /obj/item/clothing/head/helmet/plate/crusader/blue(src)
 	new /obj/item/clothing/gloves/plate/blue(src)
 	new /obj/item/clothing/shoes/plate/blue(src)
 
-/obj/item/storage/box/itemset/crusader/red/New()
-	..()
-	contents = list()
-	sleep(1)
+/obj/item/storage/box/itemset/crusader/red/PopulateContents()
 	new /obj/item/clothing/suit/armor/plate/crusader/red(src)
 	new /obj/item/clothing/head/helmet/plate/crusader/red(src)
 	new /obj/item/clothing/gloves/plate/red(src)

code/game/objects/items/storage/_storage.dm

@@ -16,7 +16,7 @@
 	AddComponent(component_type)
 
 /obj/item/storage/AllowDrop()
-	return TRUE
+	return !QDELETED(src)
 
 /obj/item/storage/contents_explosion(severity, target, origin)
 	var/in_storage = istype(loc, /obj/item/storage)? (max(0, severity - 1)) : (severity)

code/game/objects/items/storage/boxes.dm

@@ -633,7 +633,8 @@
 	STR.max_items = 8
 
 /obj/item/storage/box/snappops/PopulateContents()
-	SEND_SIGNAL(src, COMSIG_TRY_STORAGE_FILL_TYPE, /obj/item/toy/snappop)
+	for(var/i in 1 to 8)
+		new /obj/item/toy/snappop(src)
 
 /obj/item/storage/box/matches
 	name = "matchbox"
@@ -654,7 +655,8 @@
 	STR.can_hold = typecacheof(list(/obj/item/match))
 
 /obj/item/storage/box/matches/PopulateContents()
-	SEND_SIGNAL(src, COMSIG_TRY_STORAGE_FILL_TYPE, /obj/item/match)
+	for(var/i in 1 to 10)
+		new /obj/item/match(src)
 
 /obj/item/storage/box/matches/attackby(obj/item/match/W as obj, mob/user as mob, params)
 	if(istype(W, /obj/item/match))

code/game/objects/items/storage/fancy.dm

@@ -23,6 +23,8 @@
 	var/fancy_open = FALSE
 
 /obj/item/storage/fancy/PopulateContents()
+	if(!spawn_type)
+		return
 	var/datum/component/storage/STR = GetComponent(/datum/component/storage)
 	for(var/i = 1 to STR.max_items)
 		new spawn_type(src)

code/game/objects/items/summon.dm

@@ -34,6 +34,10 @@
 	if(host_type)
 		host = new host_type(src, summon_count, range)
 
+/obj/item/summon/Destroy()
+	QDEL_NULL(host)
+	return ..()
+
 /obj/item/summon/afterattack(atom/target, mob/user, proximity_flag, click_parameters)
 	. = ..()
 	if(!host)
@@ -329,7 +333,9 @@
 		if(del_no_host)
 			qdel(src)
 			return
-		HardReset(null)
+		if(animation_timerid)
+			deltimer(animation_timerid)
+		atom.transform = null
 		atom.moveToNullspace()
 		return
 	if(immediate)

code/game/objects/items/tanks/watertank.dm

@@ -119,11 +119,17 @@
 
 /obj/item/reagent_containers/spray/mister/Initialize(mapload)
 	. = ..()
+	QDEL_NULL(reagents)
 	tank = loc
 	if(!istype(tank))
 		return INITIALIZE_HINT_QDEL
 	reagents = tank.reagents	//This mister is really just a proxy for the tank's reagents
 
+/obj/item/reagent_containers/spray/mister/Destroy()
+	tank = null
+	reagents = null
+	return ..()
+
 /obj/item/reagent_containers/spray/mister/attack_self()
 	return
 
@@ -221,12 +227,18 @@
 
 /obj/item/extinguisher/mini/nozzle/Initialize(mapload)
 	. = ..()
+	QDEL_NULL(reagents)
 	tank = loc
 	if (!istype(tank))
 		return INITIALIZE_HINT_QDEL
 	reagents = tank.reagents
 	max_water = tank.volume
 
+/obj/item/extinguisher/mini/nozzle/Destroy()
+	reagents = null //This is a borrowed reference from the tank.
+	tank = null
+	return ..()
+
 
 /obj/item/extinguisher/mini/nozzle/doMove(atom/destination)
 	if(destination && (destination != tank.loc || !ismob(destination)))

code/game/objects/items/toys.dm

@@ -548,9 +548,10 @@
 /obj/effect/decal/cleanable/ash/snappop_phoenix
 	var/respawn_time = 300
 
-/obj/effect/decal/cleanable/ash/snappop_phoenix/New()
+/obj/effect/decal/cleanable/ash/snappop_phoenix/Initialize(mapload)
 	. = ..()
-	addtimer(CALLBACK(src, .proc/respawn), respawn_time)
+	if(!QDELETED(src))
+		addtimer(CALLBACK(src, .proc/respawn), respawn_time)
 
 /obj/effect/decal/cleanable/ash/snappop_phoenix/proc/respawn()
 	new /obj/item/toy/snappop/phoenix(get_turf(src))

code/game/objects/items/weaponry.dm

@@ -226,9 +226,9 @@ for further reading, please see: https://github.com/tgstation/tgstation/pull/301
 /obj/item/claymore/highlander/robot/Initialize(mapload)
 	var/obj/item/robot_module/kiltkit = loc
 	robot = kiltkit.loc
+	. = ..()
 	if(!istype(robot))
-		qdel(src)
-	return ..()
+		return INITIALIZE_HINT_QDEL
 
 /obj/item/claymore/highlander/robot/process()
 	loc.layer = LARGE_MOB_LAYER

code/game/objects/structures/bedsheet_bin.dm

@@ -293,7 +293,7 @@ GLOBAL_LIST_INIT(double_bedsheets, list(/obj/item/bedsheet/double,
 	desc = "If you're reading this description ingame, something has gone wrong! Honk!"
 
 /obj/item/bedsheet/random/Initialize(mapload)
-	..()
+	. = ..()
 	if(bedsheet_type == BEDSHEET_SINGLE)
 		var/type = pick(typesof(/obj/item/bedsheet) - (list(/obj/item/bedsheet/random, /obj/item/bedsheet/chameleon) + typesof(/obj/item/bedsheet/unlockable) + GLOB.double_bedsheets))
 		new type(loc)
@@ -454,7 +454,7 @@ GLOBAL_LIST_INIT(double_bedsheets, list(/obj/item/bedsheet/double,
 	bedsheet_type = BEDSHEET_DOUBLE
 
 /obj/item/bedsheet/random/double/Initialize(mapload)
-	..()
+	. = ..()
 	if(bedsheet_type == BEDSHEET_DOUBLE)
 		var/type = pick(GLOB.double_bedsheets)
 		new type(loc)

code/game/objects/structures/displaycase.dm

@@ -376,8 +376,9 @@
 		I = icon('icons/obj/stationobjs.dmi',"laserbox_broken")
 	if(showpiece)
 		var/icon/S = getFlatIcon(showpiece)
-		S.Scale(17,17)
-		I.Blend(S,ICON_UNDERLAY,8,12)
+		if(S)
+			S.Scale(17,17)
+			I.Blend(S,ICON_UNDERLAY,8,12)
 	src.icon = I
 	return
 

code/game/objects/structures/ghost_role_spawners.dm

@@ -433,7 +433,7 @@
 
 /obj/effect/mob_spawn/human/hotel_staff/Destroy()
 	new/obj/structure/fluff/empty_sleeper/syndicate(get_turf(src))
-	..()
+	return ..()
 
 /obj/effect/mob_spawn/human/hotel_staff/special(mob/living/carbon/human/new_spawn)
 	ADD_TRAIT(new_spawn,TRAIT_EXEMPT_HEALTH_EVENTS,GHOSTROLE_TRAIT)
@@ -457,6 +457,8 @@
 
 /obj/effect/mob_spawn/human/demonic_friend/Initialize(mapload, datum/mind/owner_mind, obj/effect/proc_holder/spell/targeted/summon_friend/summoning_spell)
 	. = ..()
+	if(!owner_mind)
+		return
 	owner = owner_mind
 	flavour_text = "You have been given a reprieve from your eternity of torment, to be [owner.name]'s friend for [owner.p_their()] short mortal coil."
 	important_info = "Be aware that if you do not live up to [owner.name]'s expectations, they can send you back to hell with a single thought. [owner.name]'s death will also return you to hell."

code/game/objects/structures/guncase.dm

@@ -13,7 +13,7 @@
 	var/capacity = 4
 
 /obj/structure/guncase/Initialize(mapload)
-	..()
+	. = ..()
 	if(mapload)
 		for(var/obj/item/I in loc.contents)
 			if(istype(I, gun_category))

code/game/objects/structures/manned_turret.dm

@@ -193,7 +193,7 @@
 
 /obj/item/gun_control/Destroy()
 	turret = null
-	..()
+	return ..()
 
 /obj/item/gun_control/CanItemAutoclick()
 	return TRUE

code/game/objects/structures/morgue.dm

@@ -121,7 +121,8 @@ GLOBAL_LIST_EMPTY(bodycontainers) //Let them act as spawnpoints for revenants an
 	playsound(src.loc, 'sound/items/deconstruct.ogg', 50, 1)
 	playsound(src, 'sound/effects/roll.ogg', 5, 1)
 	var/turf/T = get_step(src, dir)
-	connected.setDir(dir)
+	if(connected)
+		connected.setDir(dir)
 	for(var/atom/movable/AM in src)
 		AM.forceMove(T)
 	update_icon()

code/game/objects/structures/traps.dm

@@ -169,6 +169,12 @@
 	. = ..()
 	time_between_triggers = 10
 
+/obj/structure/trap/stun/hunter/Destroy()
+	if(!QDELETED(stored_item))
+		qdel(stored_item)
+	stored_item = null
+	return ..()
+
 /obj/structure/trap/stun/hunter/Crossed(atom/movable/AM)
 	if(isliving(AM))
 		var/mob/living/L = AM
@@ -179,6 +185,11 @@
 
 /obj/structure/trap/stun/hunter/flare()
 	..()
+	var/turf/our_turf = get_turf(src)
+	if(!our_turf)
+		return
+	if(!stored_item)
+		return
 	stored_item.forceMove(get_turf(src))
 	forceMove(stored_item)
 	if(caught)
@@ -208,6 +219,12 @@
 	stored_trap.name = name
 	stored_trap.stored_item = src
 
+/obj/item/bountytrap/Destroy()
+	QDEL_NULL(stored_trap)
+	QDEL_NULL(radio)
+	QDEL_NULL(spark_system)
+	. = ..()
+
 /obj/item/bountytrap/proc/announce_fugitive()
 	spark_system.start()
 	playsound(src, 'sound/machines/ding.ogg', 50, TRUE)
@@ -220,9 +237,3 @@
 	to_chat(user, "<span class=notice>You set up [src]. Examine while close to disarm it.</span>")
 	stored_trap.forceMove(T)//moves trap to ground
 	forceMove(stored_trap)//moves item into trap
-
-/obj/item/bountytrap/Destroy()
-	qdel(stored_trap)
-	QDEL_NULL(radio)
-	QDEL_NULL(spark_system)
-	. = ..()

code/game/shuttle_engines.dm

@@ -72,7 +72,7 @@
 /obj/structure/shuttle/engine/Destroy()
 	if(state == ENGINE_WELDED)
 		alter_engine_power(-engine_power)
-	. = ..()
+	return ..()
 
 //Propagates the change to the shuttle.
 /obj/structure/shuttle/engine/proc/alter_engine_power(mod)

code/game/turfs/simulated/lava.dm

@@ -48,6 +48,7 @@
 	initial_gas_mix = AIRLESS_ATMOS
 
 /turf/open/lava/Entered(atom/movable/AM)
+	. = ..()
 	if(burn_stuff(AM))
 		START_PROCESSING(SSobj, src)
 
@@ -126,7 +127,6 @@
 
 ///Proc that sets on fire something or everything on the turf that's not immune to lava. Returns TRUE to make the turf start processing.
 /turf/open/lava/proc/burn_stuff(atom/movable/to_burn, delta_time = 1)
-
 	if(is_safe())
 		return FALSE
 

code/game/turfs/simulated/openspace.dm

@@ -168,6 +168,8 @@ GLOBAL_DATUM_INIT(openspace_backdrop_one_for_all, /atom/movable/openspace_backdr
 /turf/open/openspace/icemoon/Initialize(mapload)
 	. = ..()
 	var/turf/T = below()
+	if(!T)
+		return
 	if(T.flags_1 & NO_RUINS_1 && protect_ruin)
 		ChangeTurf(replacement_turf, null, CHANGETURF_IGNORE_AIR)
 		return

code/game/turfs/space/transit.dm

@@ -92,9 +92,11 @@
 			_y = min
 
 	var/turf/T = locate(_x, _y, _z)
-	AM.forceMove(T)
-	var/turf/throwturf = get_ranged_target_turf(T, dir, 1)
-	AM.safe_throw_at(throwturf, 1, 4, null, FALSE)
+
+	if(!QDELETED(AM))
+		AM.forceMove(T)
+		var/turf/throwturf = get_ranged_target_turf(T, dir, 1)
+		AM.safe_throw_at(throwturf, 1, 4, null, FALSE)
 
 
 /turf/open/space/transit/CanBuildHere()

code/modules/antagonists/blob/blob/blobstrains/synchronous_mesh.dm

@@ -9,6 +9,7 @@
 	complementary_color = "#AD6570"
 	blobbernaut_message = "synchronously strikes"
 	message = "The blobs strike you"
+	reagent = /datum/reagent/blob/synchronous_mesh
 
 /datum/blobstrain/reagent/synchronous_mesh/damage_reaction(obj/structure/blob/B, damage, damage_type, damage_flag)
 	if(damage_flag == MELEE || damage_flag == BULLET || damage_flag == LASER) //the cause isn't fire or bombs, so split the damage

code/modules/antagonists/blob/blob/overmind.dm

@@ -72,19 +72,23 @@ GLOBAL_LIST_EMPTY(blob_nodes)
 	forceMove(T)
 
 /mob/camera/blob/proc/set_strain(datum/blobstrain/new_strain)
-	if (ispath(new_strain))
-		var/hadstrain = FALSE
-		if (istype(blobstrain))
-			blobstrain.on_lose()
-			qdel(blobstrain)
-			hadstrain = TRUE
-		blobstrain = new new_strain(src)
-		blobstrain.on_gain()
-		if (hadstrain)
-			to_chat(src, "Your strain is now: <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font>!")
-			to_chat(src, "The <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font> strain [blobstrain.description]")
-			if(blobstrain.effectdesc)
-				to_chat(src, "The <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font> strain [blobstrain.effectdesc]")
+	if(!ispath(new_strain))
+		return FALSE
+
+	var/had_strain = FALSE
+	if(istype(blobstrain))
+		blobstrain.on_lose()
+		qdel(blobstrain)
+		had_strain = TRUE
+
+	blobstrain = new new_strain(src)
+	blobstrain.on_gain()
+
+	if(had_strain)
+		to_chat(src, "Your strain is now: <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font>!")
+		to_chat(src, "The <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font> strain [blobstrain.description]")
+		if(blobstrain.effectdesc)
+			to_chat(src, "The <b><font color=\"[blobstrain.color]\">[blobstrain.name]</b></font> strain [blobstrain.effectdesc]")
 
 /mob/camera/blob/proc/is_valid_turf(turf/T)
 	var/area/A = get_area(T)

code/modules/antagonists/clockcult/clock_structures/ark_of_the_clockwork_justicar.dm

@@ -40,6 +40,24 @@
 	if(!GLOB.ark_of_the_clockwork_justiciar)
 		GLOB.ark_of_the_clockwork_justiciar = src
 
+/obj/structure/destructible/clockwork/massive/celestial_gateway/Destroy()
+	STOP_PROCESSING(SSprocessing, src)
+	if(!purpose_fulfilled)
+		var/area/gate_area = get_area(src)
+		hierophant_message("<span class='large_brass'><b>An Ark of the Clockwork Justicar has fallen at [gate_area.map_name]!</b></span>")
+		send_to_playing_players(sound(null, 0, channel = CHANNEL_JUSTICAR_ARK))
+	var/was_stranded = SSshuttle.emergency.mode == SHUTTLE_STRANDED
+	SSshuttle.clearHostileEnvironment(src)
+	if(!was_stranded && !purpose_fulfilled)
+		priority_announce("Massive energy anomaly no longer on short-range scanners, bluespace distortions still detected.","Central Command Higher Dimensional Affairs")
+	if(glow)
+		QDEL_NULL(glow)
+	if(countdown)
+		QDEL_NULL(countdown)
+	if(GLOB.ark_of_the_clockwork_justiciar == src)
+		GLOB.ark_of_the_clockwork_justiciar = null
+	. = ..()
+
 /obj/structure/destructible/clockwork/massive/celestial_gateway/on_attack_hand(mob/user, act_intent, unarmed_attack_flags)
 	if(!active  && is_servant_of_ratvar(user) && user.canUseTopic(src, !issilicon(user), NO_DEXTERY))
 		if(alert(user, "Are you sure you want to activate the ark? Once enabled, there will be no turning back.", "Enabling the ark", "Activate!", "Cancel") == "Activate!")
@@ -125,7 +143,7 @@
 			L.forceMove(pick(open_turfs))
 	glow = new(get_turf(src))
 	var/area/gate_area = get_area(src)
-	hierophant_message("<span class='large_brass'><b>An Ark of the Clockwork Justicar has been created in [gate_area.map_name]!</b></span>", FALSE, src)
+	hierophant_message("<span class='large_brass'><b>An Ark of the Clockwork Justicar has been created in [gate_area?.map_name]!</b></span>", FALSE, src)
 
 /obj/structure/destructible/clockwork/massive/celestial_gateway/proc/initiate_mass_recall()
 	recalling = TRUE
@@ -149,23 +167,7 @@
 	transform = matrix() * 2
 	animate(src, transform = matrix() * 0.5, time = 30, flags = ANIMATION_END_NOW)
 
-/obj/structure/destructible/clockwork/massive/celestial_gateway/Destroy()
-	STOP_PROCESSING(SSprocessing, src)
-	if(!purpose_fulfilled)
-		var/area/gate_area = get_area(src)
-		hierophant_message("<span class='large_brass'><b>An Ark of the Clockwork Justicar has fallen at [gate_area.map_name]!</b></span>")
-		send_to_playing_players(sound(null, 0, channel = CHANNEL_JUSTICAR_ARK))
-	var/was_stranded = SSshuttle.emergency.mode == SHUTTLE_STRANDED
-	SSshuttle.clearHostileEnvironment(src)
-	if(!was_stranded && !purpose_fulfilled)
-		priority_announce("Massive energy anomaly no longer on short-range scanners, bluespace distortions still detected.","Central Command Higher Dimensional Affairs")
-	if(glow)
-		qdel(glow)
-		glow = null
-	if(countdown)
-		qdel(countdown)
-		countdown = null
-	. = ..()
+
 
 /obj/structure/destructible/clockwork/massive/celestial_gateway/deconstruct(disassembled = TRUE)
 	if(!(flags_1 & NODECONSTRUCT_1))

code/modules/antagonists/cult/blood_magic.dm

@@ -357,9 +357,10 @@
 /obj/item/melee/blood_magic/Initialize(mapload, spell)
 	. = ..()
 	ADD_TRAIT(src, TRAIT_NODROP, CULT_TRAIT)
-	source = spell
-	uses = source.charges
-	health_cost = source.health_cost
+	if(spell)
+		source = spell
+		uses = source.charges
+		health_cost = source.health_cost
 
 
 /obj/item/melee/blood_magic/Destroy()
@@ -374,7 +375,7 @@
 			source.desc = source.base_desc
 			source.desc += "<br><b><u>Has [uses] use\s remaining</u></b>."
 			source.UpdateButtonIcon()
-	..()
+	return ..()
 
 /obj/item/melee/blood_magic/attack_self(mob/living/user)
 	afterattack(user, user, TRUE)

code/modules/antagonists/cult/cult_items.dm

@@ -137,6 +137,11 @@
 	jaunt = new(src)
 	linked_action = new(src)
 
+/obj/item/cult_bastard/Destroy()
+	QDEL_NULL(jaunt)
+	QDEL_NULL(linked_action)
+	. = ..()
+
 /obj/item/cult_bastard/ComponentInitialize()
 	. = ..()
 	AddComponent(/datum/component/butchering, 50, 80)
@@ -740,7 +745,7 @@
 /obj/item/cult_spear/Destroy()
 	if(spear_act)
 		qdel(spear_act)
-	..()
+	return ..()
 
 /obj/item/cult_spear/throw_impact(atom/hit_atom, datum/thrownthing/throwingdatum)
 	var/turf/T = get_turf(hit_atom)

code/modules/antagonists/devil/imp/imp.dm

@@ -45,7 +45,7 @@
 							of intentionally harming a fellow devil.</B>"
 
 /mob/living/simple_animal/imp/Initialize(mapload)
-	..()
+	. = ..()
 	boost = world.time + 30
 
 /mob/living/simple_animal/imp/BiologicalLife(delta_time, times_fired)

code/modules/antagonists/devil/true_devil/_true_devil.dm

@@ -29,7 +29,7 @@
 	create_bodyparts() //initialize bodyparts
 	create_internal_organs()
 	grant_all_languages()
-	..()
+	. = ..()
 
 /mob/living/carbon/true_devil/create_internal_organs()
 	internal_organs += new /obj/item/organ/brain

code/modules/antagonists/eldritch_cult/eldritch_items.dm

@@ -314,6 +314,10 @@
 	. = ..()
 	linked_action = new(src)
 
+/obj/item/melee/rune_knife/Destroy()
+	QDEL_NULL(linked_action)
+	. = ..()
+
 /obj/item/melee/rune_knife/pickup(mob/user)
 	. = ..()
 	linked_action.Grant(user, src)

code/modules/antagonists/revenant/revenant.dm

@@ -453,7 +453,7 @@
 /obj/item/ectoplasm/revenant/Destroy()
 	if(!QDELETED(revenant))
 		qdel(revenant)
-	..()
+	return ..()
 
 /proc/RevenantThrow(over, mob/user, obj/item/throwable)
 	var/mob/living/simple_animal/revenant/spooker = user

code/modules/antagonists/slaughter/slaughter.dm

@@ -71,7 +71,7 @@
 	var/datum/action/cooldown/slam
 
 /mob/living/simple_animal/slaughter/Initialize(mapload)
-	..()
+	. = ..()
 	var/obj/effect/proc_holder/spell/bloodcrawl/bloodspell = new
 	AddSpell(bloodspell)
 	slam = new /datum/action/cooldown/slam

code/modules/antagonists/swarmer/swarmer.dm

@@ -194,9 +194,11 @@
 	return 0
 
 /obj/item/IntegrateAmount() //returns the amount of resources gained when eating this item
+	. = ..()
+	if(!custom_materials)
+		return
 	if(custom_materials[SSmaterials.GetMaterialRef(/datum/material/iron)] || custom_materials[SSmaterials.GetMaterialRef(/datum/material/glass)])
 		return 1
-	return ..()
 
 /obj/item/gun/swarmer_act()//Stops you from eating the entire armory
 	return FALSE

code/modules/arousal/organs/penis.dm

@@ -88,7 +88,10 @@
 			if(T.taur_mode & S.accepted_taurs) //looks out of place on those.
 				lowershape = "taur, [lowershape]"
 
-	desc = "You see [aroused_state ? "an erect" : "a flaccid"] [lowershape] [name]. You estimate it's about [round(length*get_size(owner), 0.25)] inch[round(length*get_size(owner), 0.25) != 1 ? "es" : ""] long and [round(diameter*get_size(owner), 0.25)] inch[round(diameter*get_size(owner), 0.25) != 1 ? "es" : ""] in diameter."
+	var/adjusted_length = round(length * (owner ? get_size(owner) : 1), 0.25)
+	var/adjusted_diameter = round(diameter * (owner ? get_size(owner) : 1), 0.25)
+
+	desc = "You see [aroused_state ? "an erect" : "a flaccid"] [lowershape] [name]. You estimate it's about [adjusted_length] inch[adjusted_length != 1 ? "es" : ""] long and [adjusted_diameter] inch[adjusted_diameter != 1 ? "es" : ""] in diameter."
 
 /obj/item/organ/genital/penis/get_features(mob/living/carbon/human/H)
 	var/datum/dna/D = H.dna

code/modules/assembly/flash.dm

@@ -234,6 +234,10 @@
 	var/obj/item/organ/cyberimp/arm/flash/I = null
 	var/active_light_strength = 7
 
+/obj/item/assembly/flash/armimplant/Destroy()
+	I = null
+	return ..()
+
 /obj/item/assembly/flash/armimplant/burn_out()
 	if(I && I.owner)
 		to_chat(I.owner, "<span class='warning'>Your photon projector implant overheats and deactivates!</span>")

code/modules/awaymissions/capture_the_flag.dm

@@ -173,7 +173,7 @@
 
 /obj/machinery/capture_the_flag/Destroy()
 	GLOB.poi_list.Remove(src)
-	..()
+	return ..()
 
 /obj/machinery/capture_the_flag/process(delta_time)
 	for(var/i in spawned_mobs)
@@ -642,7 +642,7 @@
 	invisibility = 0
 
 /obj/effect/ctf/ammo/Initialize(mapload)
-	..()
+	. = ..()
 	QDEL_IN(src, AMMO_DROP_LIFETIME)
 
 /obj/effect/ctf/ammo/Crossed(atom/movable/AM)
@@ -681,6 +681,11 @@
 	for(var/obj/machinery/capture_the_flag/CTF in GLOB.machines)
 		CTF.dead_barricades += src
 
+/obj/effect/ctf/dead_barricade/Destroy(force)
+	for(var/obj/machinery/capture_the_flag/CTF in GLOB.machines)
+		CTF.dead_barricades -= src
+	return ..()
+
 /obj/effect/ctf/dead_barricade/proc/respawn()
 	if(!QDELETED(src))
 		new /obj/structure/barricade/security/ctf(get_turf(src))

code/modules/awaymissions/mission_code/Cabin.dm

@@ -44,7 +44,7 @@
 	var/active = 1
 
 /obj/structure/firepit/Initialize(mapload)
-	..()
+	. = ..()
 	toggleFirepit()
 
 /obj/structure/firepit/interact(mob/living/user)

code/modules/buildmode/effects/line.dm

@@ -3,6 +3,9 @@
 	var/client/cl
 
 /obj/effect/buildmode_line/New(client/C, atom/atom_a, atom/atom_b, linename)
+	if(!C || !atom_a || !atom_b)
+		stack_trace("Buildmode effect created with odd inputs")
+		return
 	name = linename
 	loc = get_turf(atom_a)
 	I = image('icons/misc/mark.dmi', src, "line", 19.0)

code/modules/cargo/gondolapod.dm

@@ -28,6 +28,9 @@
 	var/obj/structure/closet/supplypod/centcompod/linked_pod
 
 /mob/living/simple_animal/pet/gondola/gondolapod/Initialize(mapload, pod)
+	if(!pod)
+		stack_trace("Gondola pod created with no pod")
+		return INITIALIZE_HINT_QDEL
 	linked_pod = pod
 	name = linked_pod.name
 	. = ..()
@@ -71,6 +74,6 @@
 	update_icon()
 
 /mob/living/simple_animal/pet/gondola/gondolapod/death()
-	qdel(linked_pod) //Will cause the open() proc for the linked supplypod to be called with the "broken" parameter set to true, meaning that it will dump its contents on death
+	QDEL_NULL(linked_pod) //Will cause the open() proc for the linked supplypod to be called with the "broken" parameter set to true, meaning that it will dump its contents on death
 	qdel(src)
 	..()

code/modules/cargo/supplypod.dm

@@ -538,6 +538,9 @@
 
 /obj/effect/pod_landingzone_effect/Initialize(mapload, obj/structure/closet/supplypod/pod)
 	. = ..()
+	if(!pod)
+		stack_trace("Pod landingzone effect created with no pod")
+		return INITIALIZE_HINT_QDEL
 	transform = matrix() * 1.5
 	animate(src, transform = matrix()*0.01, time = pod.delays[POD_TRANSIT]+pod.delays[POD_FALLING])
 
@@ -556,6 +559,9 @@
 
 /obj/effect/pod_landingzone/Initialize(mapload, podParam, single_order = null, clientman)
 	. = ..()
+	if(!podParam)
+		stack_trace("Pod landingzone created with no pod")
+		return INITIALIZE_HINT_QDEL
 	if (ispath(podParam)) //We can pass either a path for a pod (as expressconsoles do), or a reference to an instantiated pod (as the centcom_podlauncher does)
 		podParam = new podParam() //If its just a path, instantiate it
 	pod = podParam

code/modules/clothing/gloves/mittens.dm

@@ -13,7 +13,7 @@
 /obj/item/clothing/gloves/mittens/random
 
 /obj/item/clothing/gloves/mittens/random/Initialize(mapload)
-	..()
+	. = ..()
 	var/colours = list("black", "yellow", "lightbrown", "brown", "orange", "red", "purple", "green", "blue", "kitten")
 	var/picked_c = pick(colours)
 	if(picked_c == "kitten")

code/modules/clothing/masks/gasmask.dm

@@ -56,7 +56,7 @@
 /obj/item/clothing/mask/gas/welding/up
 
 /obj/item/clothing/mask/gas/welding/up/Initialize(mapload)
-	..()
+	. = ..()
 	visor_toggling()
 
 

code/modules/clothing/spacesuits/hardsuit.dm

@@ -313,6 +313,10 @@
 	if(istype(loc, /obj/item/clothing/suit/space/hardsuit/syndi))
 		linkedsuit = loc
 
+/obj/item/clothing/head/helmet/space/hardsuit/syndi/Destroy()
+	linkedsuit = null
+	return ..()
+
 /obj/item/clothing/head/helmet/space/hardsuit/syndi/attack_self(mob/user) //Toggle Helmet
 	if(!isturf(user.loc))
 		to_chat(user, "<span class='warning'>You cannot toggle your helmet while in this [user.loc]!</span>" )
@@ -526,6 +530,10 @@
 	. = ..()
 	bomb_radar = new /obj/machinery/doppler_array/integrated(src)
 
+/obj/item/clothing/head/helmet/space/hardsuit/rd/Destroy()
+	QDEL_NULL(bomb_radar)
+	return ..()
+
 /obj/item/clothing/head/helmet/space/hardsuit/rd/equipped(mob/living/carbon/human/user, slot)
 	..()
 	if (slot == ITEM_SLOT_HEAD)
@@ -700,6 +708,10 @@
 	. = ..()
 	bomb_radar = new /obj/machinery/doppler_array/integrated(src)
 
+/obj/item/clothing/head/helmet/space/hardsuit/ancient/mason/Destroy()
+	QDEL_NULL(bomb_radar)
+	return ..()
+
 /obj/item/clothing/head/helmet/space/hardsuit/ancient/mason/equipped(mob/living/carbon/human/user, slot)
 	..()
 	if (slot == ITEM_SLOT_HEAD)
@@ -965,7 +977,7 @@
 	var/energy_color = "#35FFF0"
 
 /obj/item/clothing/suit/space/hardsuit/lavaknight/Initialize(mapload)
-	..()
+	. = ..()
 	light_color = energy_color
 	set_light(1)
 	update_icon()

code/modules/clothing/suits/toggles.dm

@@ -153,8 +153,8 @@
 /obj/item/clothing/suit/space/hardsuit/Destroy()
 	if(helmet)
 		helmet.suit = null
-		qdel(helmet)
-	qdel(jetpack)
+		QDEL_NULL(helmet)
+	QDEL_NULL(jetpack)
 	return ..()
 
 /obj/item/clothing/head/helmet/space/hardsuit/Destroy()

code/modules/clothing/under/color.dm

@@ -12,7 +12,7 @@
 	icon_state = "random_jumpsuit"
 
 /obj/item/clothing/under/color/random/Initialize(mapload)
-	..()
+	. = ..()
 	var/obj/item/clothing/under/color/C = pick(typesof(/obj/item/clothing/under/color) - subtypesof(/obj/item/clothing/under/color/jumpskirt) - /obj/item/clothing/under/color/random - /obj/item/clothing/under/color/grey/glorf - /obj/item/clothing/under/color/black/ghost)
 
 	if(ishuman(loc))
@@ -26,7 +26,7 @@
 	icon_state = "random_jumpsuit"		//Skirt variant needed
 
 /obj/item/clothing/under/color/jumpskirt/random/Initialize(mapload)
-	..()
+	. = ..()
 	var/obj/item/clothing/under/color/jumpskirt/C = pick(subtypesof(/obj/item/clothing/under/color/jumpskirt) - /obj/item/clothing/under/color/jumpskirt/random)
 	if(ishuman(loc))
 		var/mob/living/carbon/human/H = loc

code/modules/detectivework/detective_work.dm

@@ -67,7 +67,7 @@
 
 //Set ignoregloves to add prints irrespective of the mob having gloves on.
 /atom/proc/add_fingerprint(mob/living/M, ignoregloves = FALSE)
-	if(!M || !M.key)
+	if(!istype(M))
 		return
 
 	add_hiddenprint(M)

code/modules/events/travelling_trader.dm

@@ -118,7 +118,7 @@
 	smoke.set_up(1, loc)
 	smoke.start()
 	visible_message("<b>[src]</b> disappears in a puff of smoke, leaving something on the ground!")
-	..()
+	return ..()
 
 //travelling trader subtypes (the types that can actually spawn)
 //so far there's: cook / botanist / bartender / animal hunter / artifact dealer / surgeon (6 types!)
@@ -144,7 +144,7 @@
 		requested_item = result
 	else
 		requested_item = /obj/item/reagent_containers/food/snacks/copypasta
-	..()
+	. = ..()
 
 //botanist
 /mob/living/carbon/human/dummy/travelling_trader/gardener
@@ -164,7 +164,7 @@
 	requested_item = pick(subtypesof(/obj/item/reagent_containers/food/snacks/grown) - list(/obj/item/reagent_containers/food/snacks/grown/shell,
 		/obj/item/reagent_containers/food/snacks/grown/shell/gatfruit,
 		/obj/item/reagent_containers/food/snacks/grown/cherry_bomb))
-	..()
+	. = ..()
 
 //animal hunter
 /mob/living/carbon/human/dummy/travelling_trader/animal_hunter
@@ -280,7 +280,7 @@
 
 /mob/living/carbon/human/dummy/travelling_trader/artifact_dealer/Initialize(mapload)
 	possible_rewards += list(pick(subtypesof(/obj/item/clothing/head/collectable)) = 1) //this is slightly lower because it's absolutely useless
-	..()
+	. = ..()
 
 /datum/outfit/artifact_dealer
 	name = "Artifact Dealer"

code/modules/events/wizard/greentext.dm

@@ -39,6 +39,26 @@
 	roundend_callback = CALLBACK(src,.proc/check_winner)
 	SSticker.OnRoundend(roundend_callback)
 
+/obj/item/greentext/Destroy(force)
+	if(!(resistance_flags & ON_FIRE) && !force)
+		return QDEL_HINT_LETMELIVE
+
+	SSticker.round_end_events -= roundend_callback
+	GLOB.poi_list.Remove(src)
+	roundend_callback = null
+	for(var/i in GLOB.player_list)
+		var/mob/M = i
+		var/message = "<span class='warning'>A dark temptation has passed from this world"
+		if(M in color_altered_mobs)
+			message += " and you're finally able to forgive yourself"
+			if(M.color == "#FF0000" || M.color == "#00FF00")
+				M.remove_atom_colour(ADMIN_COLOUR_PRIORITY)
+		message += "...</span>"
+		// can't skip the mob check as it also does the decolouring
+		if(!quiet)
+			to_chat(M, message)
+	. = ..()
+
 /obj/item/greentext/equipped(mob/living/user as mob)
 	to_chat(user, "<font color='green'>So long as you leave this place with greentext in hand you know will be happy...</font>")
 	var/list/other_objectives = user.mind.get_all_objectives()
@@ -80,24 +100,7 @@
 		last_holder.add_atom_colour("#FF0000", ADMIN_COLOUR_PRIORITY)
 		last_holder = new_holder //long live the king
 
-/obj/item/greentext/Destroy(force)
-	if(!(resistance_flags & ON_FIRE) && !force)
-		return QDEL_HINT_LETMELIVE
 
-	SSticker.round_end_events -= roundend_callback
-	GLOB.poi_list.Remove(src)
-	for(var/i in GLOB.player_list)
-		var/mob/M = i
-		var/message = "<span class='warning'>A dark temptation has passed from this world"
-		if(M in color_altered_mobs)
-			message += " and you're finally able to forgive yourself"
-			if(M.color == "#FF0000" || M.color == "#00FF00")
-				M.remove_atom_colour(ADMIN_COLOUR_PRIORITY)
-		message += "...</span>"
-		// can't skip the mob check as it also does the decolouring
-		if(!quiet)
-			to_chat(M, message)
-	. = ..()
 
 /obj/item/greentext/quiet
 	quiet = TRUE

code/modules/fields/infinite_void.dm

@@ -34,7 +34,8 @@
 		INVOKE_ASYNC(src, .proc/domain_expansion)
 
 /obj/effect/domain_expansion/Destroy()
-	qdel(chronofield)
+	QDEL_NULL(chronofield)
+	target = null
 	return ..()
 
 /obj/effect/domain_expansion/proc/domain_expansion()

code/modules/flufftext/Hallucination.dm

@@ -106,6 +106,9 @@ GLOBAL_LIST_INIT(hallucination_list, list(
 
 /obj/effect/hallucination/simple/Initialize(mapload, var/mob/living/carbon/T)
 	. = ..()
+	if(!T)
+		stack_trace("A hallucination was created with no target")
+		return INITIALIZE_HINT_QDEL
 	target = T
 	current_image = GetImage()
 	if(target.client)

code/modules/food_and_drinks/food/snacks/meat.dm

@@ -278,7 +278,7 @@
 	visible_message("[src] finishes cooking!")
 	new /obj/item/reagent_containers/food/snacks/meat/steak/goliath(loc)
 	qdel(src)
-	
+
 /obj/item/reagent_containers/food/snacks/meat/slab/dragon
 	name = "ash drake meat"
 	desc = "Meat from an ash drake. It's probably not a good idea to eat this raw."
@@ -408,7 +408,7 @@
 	trash = null
 	tastes = list("meat" = 1, "rock" = 1)
 	foodtype = MEAT
-	
+
 /obj/item/reagent_containers/food/snacks/meat/steak/dragon
 	name = "dragon steak"
 	desc = "Spicy."

code/modules/holiday/halloween/halloween.dm

@@ -43,7 +43,7 @@
 	var/mob/trapped_mob
 
 /obj/structure/closet/Initialize(mapload)
-	..()
+	. = ..()
 	if(prob(30))
 		set_spooky_trap()
 

code/modules/instruments/songs/_song.dm

@@ -146,6 +146,8 @@
 	stop_playing()
 	SSinstruments.on_song_del(src)
 	lines = null
+	if(using_instrument)
+		using_instrument.songs_using -= src
 	using_instrument = null
 	allowed_instrument_ids = null
 	parent = null

code/modules/integrated_electronics/subtypes/input.dm

@@ -654,18 +654,19 @@
 
 /obj/item/integrated_circuit/input/signaler/Initialize(mapload)
 	. = ..()
-	spawn(40)
-		set_frequency(frequency)
-		// Set the pins so when someone sees them, they won't show as null
-		set_pin_data(IC_INPUT, 1, frequency)
-		set_pin_data(IC_INPUT, 2, code)
+	addtimer(CALLBACK(src, .proc/init_frequency), 4 SECONDS)
 
 /obj/item/integrated_circuit/input/signaler/Destroy()
 	SSradio.remove_object(src,frequency)
-
 	frequency = 0
 	return ..()
 
+/obj/item/integrated_circuit/input/signaler/proc/init_frequency()
+	set_frequency(frequency)
+	// Set the pins so when someone sees them, they won't show as null
+	set_pin_data(IC_INPUT, 1, frequency)
+	set_pin_data(IC_INPUT, 2, code)
+
 /obj/item/integrated_circuit/input/signaler/on_data_written()
 	var/new_freq = get_pin_data(IC_INPUT, 1)
 	var/new_code = get_pin_data(IC_INPUT, 2)

code/modules/integrated_electronics/subtypes/smart.dm

@@ -177,7 +177,7 @@
 
 /obj/item/integrated_circuit/input/mmi_tank/Destroy()
 	RemoveBrain()
-	..()
+	return ..()
 
 /obj/item/integrated_circuit/input/mmi_tank/relaymove(var/n,var/dir)
 	set_pin_data(IC_OUTPUT, 2, dir)
@@ -320,7 +320,7 @@
 
 /obj/item/integrated_circuit/input/pAI_connector/Destroy()
 	RemovepAI()
-	..()
+	return ..()
 
 /obj/item/integrated_circuit/input/pAI_connector/proc/RemovepAI()
 	if(installed_pai)

code/modules/library/random_books.dm

@@ -2,7 +2,7 @@
 	icon_state = "random_book"
 
 /obj/item/book/manual/random/Initialize(mapload)
-	..()
+	. = ..()
 	var/static/banned_books = list(/obj/item/book/manual/random, /obj/item/book/manual/nuclear, /obj/item/book/manual/wiki)
 	var/newtype = pick(subtypesof(/obj/item/book/manual) - banned_books)
 	new newtype(loc)