Further runtime fixes by AnturK.

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