Del The World: Unit testing for hard deletes (#59612)

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

code/modules/antagonists/blob/structures/_blob.dm

@@ -46,7 +46,8 @@
 	if(atmosblock)
 		air_update_turf(TRUE, TRUE)
 	ConsumeTile()
-	AddElement(/datum/element/swabable, CELL_LINE_TABLE_BLOB, CELL_VIRUS_TABLE_GENERIC, 2, 2)
+	if(!QDELETED(src)) //Consuming our tile can in rare cases cause us to del
+		AddElement(/datum/element/swabable, CELL_LINE_TABLE_BLOB, CELL_VIRUS_TABLE_GENERIC, 2, 2)
 
 /obj/structure/blob/proc/creation_action() //When it's created by the overmind, do this.
 	return

code/modules/antagonists/cult/blood_magic.dm

@@ -359,9 +359,10 @@
 	var/datum/action/innate/cult/blood_spell/source
 
 /obj/item/melee/blood_magic/New(loc, spell)
-	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()
@@ -376,7 +377,7 @@
 			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/revenant/revenant.dm

@@ -484,7 +484,7 @@
 /obj/item/ectoplasm/revenant/Destroy()
 	if(!QDELETED(revenant))
 		qdel(revenant)
-	..()
+	return ..()
 
 //objectives
 /datum/objective/revenant

code/modules/antagonists/traitor/equipment/Malf_Modules.dm

@@ -305,10 +305,10 @@ GLOBAL_LIST_INIT(malf_modules, subtypesof(/datum/ai_module))
 
 /obj/machinery/doomsday_device/Initialize()
 	. = ..()
-	owner = loc
-	if(!istype(owner))
+	if(!isAI(loc))
 		stack_trace("Doomsday created outside an AI somehow, shit's fucking broke. Anyway, we're just gonna qdel now. Go make a github issue report.")
-		qdel(src)
+		return INITIALIZE_HINT_QDEL
+	owner = loc
 	countdown = new(src)
 
 /obj/machinery/doomsday_device/Destroy()
@@ -318,7 +318,7 @@ GLOBAL_LIST_INIT(malf_modules, subtypesof(/datum/ai_module))
 	SSshuttle.clearHostileEnvironment(src)
 	SSmapping.remove_nuke_threat(src)
 	set_security_level("red")
-	for(var/mob/living/silicon/robot/borg in owner.connected_robots)
+	for(var/mob/living/silicon/robot/borg in owner?.connected_robots)
 		borg.lamp_doom = FALSE
 		borg.toggle_headlamp(FALSE, TRUE) //forces borg lamp to update
 	owner?.doomsday_device = null