A few more, ported, runtime fixes.

code/modules/atmospherics/machinery/components/components_base.dm

@@ -30,7 +30,7 @@
 	underlays.Cut()
 
 	var/turf/T = loc
-	if(level == 2 || !T.intact)
+	if(level == 2 || (istype(T) && !T.intact))
 		showpipe = TRUE
 		plane = GAME_PLANE
 	else

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

@@ -336,7 +336,8 @@
 			if(bomb_armor < EXPLODE_GIB_THRESHOLD) //gibs the mob if their bomb armor is lower than EXPLODE_GIB_THRESHOLD
 				for(var/I in contents)
 					var/atom/A = I
-					A.ex_act(severity)
+					if(!QDELETED(A))
+						A.ex_act(severity)
 				gib()
 				return
 			else

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

@@ -207,7 +207,11 @@
 
 		switch(add_to)
 			if("collar")
-				add_collar(usr.get_active_held_item(), usr)
+				var/obj/item/clothing/neck/petcollar/P = usr.get_active_held_item()
+				if(!istype(P))
+					to_chat(usr,"<span class='warning'>That's not a collar.</span>")
+					return
+				add_collar(P, usr)
 				update_corgi_fluff()
 
 			if(BODY_ZONE_HEAD)

code/modules/modular_computers/computers/item/computer_damage.dm

@@ -23,6 +23,8 @@
 		new /obj/item/stack/sheet/metal(newloc, round(steel_sheet_cost/2))
 		for(var/C in all_components)
 			var/obj/item/computer_hardware/H = all_components[C]
+			if(QDELETED(H))
+				return
 			uninstall_component(H)
 			H.forceMove(newloc)
 			if(prob(25))

code/modules/research/experimentor.dm

@@ -573,7 +573,8 @@
 		else if(loc == user)
 			cooldown = TRUE
 			call(src,realProc)(user)
-			addtimer(CALLBACK(src, .proc/cd), cooldownMax)
+			if(!QDELETED(src))
+				addtimer(CALLBACK(src, .proc/cd), cooldownMax)
 	else
 		to_chat(user, "<span class='notice'>You aren't quite sure what to do with this yet.</span>")