runtime fixes

code/modules/integrated_electronics/passive/power.dm

@@ -93,7 +93,7 @@
 	container_type = OPENCONTAINER
 	complexity = 4
 	inputs = list()
-	outputs = list("volume used" = IC_PINTYPE_NUMBER, "self reference" = IC_PINTYPE_REF)
+	outputs = list("volume used" = IC_PINTYPE_NUMBER, "self reference" = IC_PINTYPE_SELFREF)
 	activators = list("push ref" = IC_PINTYPE_PULSE_IN)
 	spawn_flags = IC_SPAWN_DEFAULT|IC_SPAWN_RESEARCH
 	var/volume = 60

code/modules/projectiles/pins.dm

@@ -60,8 +60,9 @@
 	if(user)
 		user.show_message(fail_message, 1)
 	if(selfdestruct)
-		user.show_message("<span class='danger'>SELF-DESTRUCTING...</span><br>", 1)
-		to_chat(user, "<span class='userdanger'>[gun] explodes!</span>")
+		if(user)
+			user.show_message("<span class='danger'>SELF-DESTRUCTING...</span><br>", 1)
+			to_chat(user, "<span class='userdanger'>[gun] explodes!</span>")
 		explosion(get_turf(gun), -1, 0, 2, 3)
 		if(gun)
 			qdel(gun)

code/modules/reagents/chemistry/machinery/chem_dispenser.dm

@@ -191,7 +191,7 @@
 		return
 	switch(action)
 		if("amount")
-			if(!is_operational())
+			if(!is_operational() || QDELETED(beaker))
 				return
 			var/target = text2num(params["target"])
 			if(target in beaker.possible_transfer_amounts)