It's past midnight, time for your runtimes flattening.

code/game/objects/items/pinpointer.dm

@@ -83,7 +83,7 @@
 
 /obj/item/pinpointer/crew/proc/trackable(mob/living/carbon/human/H)
 	var/turf/here = get_turf(src)
-	if((H.z == 0 || H.z == here.z) && istype(H.w_uniform, /obj/item/clothing/under))
+	if(H && (H.z == 0 || H.z == here.z) && istype(H.w_uniform, /obj/item/clothing/under))
 		var/obj/item/clothing/under/U = H.w_uniform
 
 		// Suit sensors must be on maximum.

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

@@ -112,6 +112,9 @@ GLOBAL_LIST_EMPTY(parasites) //all currently existing/living guardians
 			attacktext = "bites"
 			attack_sound = 'sound/weapons/bite.ogg'
 			recolorentiresprite = TRUE
+		if(!recolorentiresprite)
+			cooloverlay = mutable_appearance(icon, theme)
+			add_overlay(cooloverlay)
 
 /mob/living/simple_animal/hostile/guardian/Login() //if we have a mind, set its name to ours when it logs in
 	..()

code/modules/spells/spell_types/summonitem.dm

@@ -105,7 +105,7 @@
 
 			if(item_to_retrieve.loc)
 				item_to_retrieve.loc.visible_message("<span class='warning'>The [item_to_retrieve.name] suddenly disappears!</span>")
-			if(!L.put_in_hands(item_to_retrieve))
+			if(!isitem(item_to_retrieve) || !L.put_in_hands(item_to_retrieve))
 				item_to_retrieve.forceMove(L.drop_location())
 				item_to_retrieve.loc.visible_message("<span class='caution'>The [item_to_retrieve.name] suddenly appears!</span>")
 				playsound(get_turf(L), 'sound/magic/summonitems_generic.ogg', 50, 1)