Fixes #2915

code/game/machinery/bots/medbot.dm

@@ -299,6 +299,7 @@
 	if(src.patient && src.path.len == 0 && (get_dist(src,src.patient) > 1))
 		spawn(0)
 			src.path = AStar(src.loc, get_turf(src.patient), /turf/proc/CardinalTurfsWithAccess, /turf/proc/Distance, 0, 30,id=botcard)
+			if (!path) path = list()
 			if(src.path.len == 0)
 				src.oldpatient = src.patient
 				src.patient = null

code/game/machinery/bots/secbot.dm

@@ -583,7 +583,7 @@ Auto Patrol: []"},
 // given an optional turf to avoid
 /obj/machinery/bot/secbot/proc/calc_path(var/turf/avoid = null)
 	src.path = AStar(src.loc, patrol_target, /turf/proc/CardinalTurfsWithAccess, /turf/proc/Distance, 0, 120, id=botcard, exclude=avoid)
-
+	if (!path) path = list()
 
 // look for a criminal in view of the bot