From b5f473a3df5459620dcf1f9feef27b7e437da822 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Fri, 31 Mar 2017 13:14:05 +0100
Subject: [PATCH] Throw an exception when attempting to tick closed Levels

---
 src/pocketmine/level/Level.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 0ad2e7fbc..25acf601d 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -645,6 +645,9 @@ class Level implements ChunkManager, Metadatable{
 	 *
 	 */
 	public function doTick(int $currentTick){
+		if($this->closed){
+			throw new \InvalidStateException("Attempted to tick a Level which has been closed");
+		}
 
 		$this->timings->doTick->startTiming();