From 8d645b714fa80adec9b4bc05ada96aea20d59975 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Tue, 20 Mar 2018 10:55:24 +0000
Subject: [PATCH] Position: Destroy references to Level in isValid()

---
 src/pocketmine/level/Position.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/pocketmine/level/Position.php b/src/pocketmine/level/Position.php
index b573818a8..770a69864 100644
--- a/src/pocketmine/level/Position.php
+++ b/src/pocketmine/level/Position.php
@@ -94,7 +94,13 @@ class Position extends Vector3{
 	 * @return bool
 	 */
 	public function isValid() : bool{
-		return $this->getLevel() instanceof Level;
+		if($this->level !== null and $this->level->isClosed()){
+			$this->level = null;
+
+			return false;
+		}
+
+		return $this->level !== null;
 	}
 
 	/**