Further runtime fixes by AnturK.

code/datums/traits/_quirk.dm

@@ -15,6 +15,7 @@
 /datum/quirk/New(mob/living/quirk_mob, spawn_effects)
 	if(!quirk_mob || (human_only && !ishuman(quirk_mob)) || quirk_mob.has_quirk(type))
 		qdel(src)
+		return
 	quirk_holder = quirk_mob
 	SSquirks.quirk_objects += src
 	to_chat(quirk_holder, gain_text)

code/game/gamemodes/objective.dm

@@ -527,7 +527,7 @@ GLOBAL_LIST_EMPTY(possible_items)
 				else if(targetinfo.check_special_completion(I))//Returns 1 by default. Items with special checks will return 1 if the conditions are fulfilled.
 					return TRUE
 
-			if(targetinfo && I.type in targetinfo.altitems) //Ok, so you don't have the item. Do you have an alternative, at least?
+			if(targetinfo && (I.type in targetinfo.altitems)) //Ok, so you don't have the item. Do you have an alternative, at least?
 				if(targetinfo.check_special_completion(I))//Yeah, we do! Don't return 0 if we don't though - then you could fail if you had 1 item that didn't pass and got checked first!
 					return TRUE
 	return FALSE

code/game/machinery/camera/camera.dm

@@ -319,7 +319,8 @@
 	if(status)
 		change_msg = "reactivates"
 		triggerCameraAlarm()
-		addtimer(CALLBACK(src, .proc/cancelCameraAlarm), 100)
+		if(!QDELETED(src)) //We'll be doing it anyway in destroy
+			addtimer(CALLBACK(src, .proc/cancelCameraAlarm), 100)
 	if(displaymessage)
 		if(user)
 			visible_message("<span class='danger'>[user] [change_msg] [src]!</span>")

code/game/machinery/constructable_frame.dm

@@ -119,6 +119,9 @@
 
 			if(istype(P, /obj/item/circuitboard/machine))
 				var/obj/item/circuitboard/machine/B = P
+				if(!B.build_path)
+					to_chat(user, "<span class'warning'>This circuitboard seems to be broken.</span>")
+					return
 				if(!anchored && B.needs_anchored)
 					to_chat(user, "<span class='warning'>The frame needs to be secured first!</span>")
 					return

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

@@ -14,6 +14,7 @@
 	var/last_use = 0
 	var/next_use = 0
 	var/obj/effect/abstract/sync_holder/sync_holder
+	var/resync_timer
 
 /obj/item/desynchronizer/attack_self(mob/living/user)
 	if(world.time < next_use)
@@ -56,16 +57,20 @@
 		SEND_SIGNAL(AM, COMSIG_MOVABLE_SECLUDED_LOCATION)
 	last_use = world.time
 	icon_state = "desynchronizer-on"
-	addtimer(CALLBACK(src, .proc/resync), duration)
+	resync_timer = addtimer(CALLBACK(src, .proc/resync), duration , TIMER_STOPPABLE)
 
 /obj/item/desynchronizer/proc/resync()
 	new /obj/effect/temp_visual/desynchronizer(sync_holder.drop_location())
 	QDEL_NULL(sync_holder)
+	if(resync_timer)
+		deltimer(resync_timer)
+		resync_timer = null
 	icon_state = initial(icon_state)
 	next_use = world.time + (world.time - last_use) // Could be 2*world.time-last_use but that would just be confusing
 
 /obj/item/desynchronizer/Destroy()
-	resync()
+	if(sync_holder)
+		resync()
 	return ..()
 
 /obj/effect/abstract/sync_holder

code/game/objects/structures/headpike.dm

@@ -42,8 +42,9 @@
 	if(.)
 		return
 	to_chat(user, "<span class='notice'>You take down [src].</span>")
-	victim.forceMove(drop_location())
-	victim = null
+	if(victim)
+		victim.forceMove(drop_location())
+		victim = null
 	spear.forceMove(drop_location())
 	spear = null
 	qdel(src)

code/modules/antagonists/abductor/equipment/abduction_gear.dm

@@ -29,6 +29,11 @@
 	var/stealth_armor = list("melee" = 15, "bullet" = 15, "laser" = 15, "energy" = 15, "bomb" = 15, "bio" = 15, "rad" = 15, "fire" = 70, "acid" = 70)
 	var/combat_armor = list("melee" = 50, "bullet" = 50, "laser" = 50, "energy" = 50, "bomb" = 50, "bio" = 50, "rad" = 50, "fire" = 90, "acid" = 90)
 
+/obj/item/clothing/suit/armor/abductor/vest/Initialize()
+	. = ..()
+	stealth_armor = getArmor(arglist(stealth_armor))
+	combat_armor = getArmor(arglist(combat_armor))
+
 /obj/item/clothing/suit/armor/abductor/vest/proc/toggle_nodrop()
 	if(HAS_TRAIT_FROM(src, TRAIT_NODROP, ABDUCTOR_VEST_TRAIT))
 		REMOVE_TRAIT(src, TRAIT_NODROP, ABDUCTOR_VEST_TRAIT)

code/modules/antagonists/swarmer/swarmer.dm

@@ -274,7 +274,8 @@
 
 /obj/machinery/camera/swarmer_act(mob/living/simple_animal/hostile/swarmer/S)
 	S.DisIntegrate(src)
-	toggle_cam(S, 0)
+	if(!QDELETED(S)) //If it got blown up no need to turn it off.
+		toggle_cam(S, 0)
 	return TRUE
 
 /obj/machinery/particle_accelerator/control_box/swarmer_act(mob/living/simple_animal/hostile/swarmer/S)

code/modules/clothing/outfits/ert.dm

@@ -18,8 +18,9 @@
 	R.freqlock = TRUE
 
 	var/obj/item/card/id/W = H.wear_id
-	W.registered_name = H.real_name
-	W.update_label(W.registered_name, W.assignment)
+	if(W)
+		W.registered_name = H.real_name
+		W.update_label(W.registered_name, W.assignment)
 
 /datum/outfit/ert/commander
 	name = "ERT Commander"

code/modules/mob/living/carbon/human/death.dm

@@ -44,7 +44,8 @@
 		if(M.occupant == src)
 			M.go_out()
 
-	dna.species.spec_death(gibbed, src)
+	if(!QDELETED(dna)) //The gibbed param is bit redundant here since dna won't exist at this point if they got deleted.
+		dna.species.spec_death(gibbed, src)
 
 	if(SSticker.HasRoundStarted())
 		SSblackbox.ReportDeath(src)

code/modules/mob/living/carbon/human/species_types/jellypeople.dm

@@ -849,6 +849,8 @@
 	linked_mobs.Add(M)
 	if(!selflink)
 		to_chat(M, "<span class='notice'>You are now connected to [slimelink_owner.real_name]'s Slime Link.</span>")
+		RegisterSignal(M, COMSIG_MOB_DEATH , .proc/unlink_mob)
+		RegisterSignal(M, COMSIG_PARENT_QDELETING, .proc/unlink_mob)
 	var/datum/action/innate/linked_speech/action = new(src)
 	linked_actions.Add(action)
 	action.Grant(M)
@@ -858,6 +860,7 @@
 	var/link_id = linked_mobs.Find(M)
 	if(!(link_id))
 		return
+	UnregisterSignal(M, list(COMSIG_MOB_DEATH, COMSIG_PARENT_QDELETING))
 	var/datum/action/innate/linked_speech/action = linked_actions[link_id]
 	action.Remove(M)
 	to_chat(M, "<span class='notice'>You are no longer connected to [slimelink_owner.real_name]'s Slime Link.</span>")
@@ -890,18 +893,11 @@
 		Remove(H)
 		return
 
-	if(QDELETED(H) || H.stat == DEAD)
-		species.unlink_mob(H)
-		return
-
 	if(message)
 		var/msg = "<i><font color=#008CA2>\[[species.slimelink_owner.real_name]'s Slime Link\] <b>[H]:</b> [message]</font></i>"
 		log_directed_talk(H, species.slimelink_owner, msg, LOG_SAY, "slime link")
 		for(var/X in species.linked_mobs)
 			var/mob/living/M = X
-			if(QDELETED(M) || M.stat == DEAD)
-				species.unlink_mob(M)
-				continue
 			to_chat(M, msg)
 
 		for(var/X in GLOB.dead_mob_list)

code/modules/paperwork/paperplane.dm

@@ -34,7 +34,9 @@
 
 /obj/item/paperplane/handle_atom_del(atom/A)
 	if(A == internalPaper)
+		var/obj/item/paper/P = internalPaper
 		internalPaper = null
+		P.moveToNullspace() //So we're not deleting it twice when deleting our contents.
 		if(!QDELETED(src))
 			qdel(src)
 	return ..()