From bdb9b1865bdd5773d292314e7929c310d122576f Mon Sep 17 00:00:00 2001
From: Shoghi Cervantes <shoghicp@gmail.com>
Date: Fri, 5 Jun 2015 15:59:47 +0200
Subject: [PATCH] Added exception when unloading the default level without
 switching it first, #3112

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

diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index aee5ade42..8b643f39d 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -1015,6 +1015,9 @@ class Server{
 	 * @return bool
 	 */
 	public function unloadLevel(Level $level, $forceUnload = false){
+		if($level === $this->getDefaultLevel() and !$forceUnload){
+			throw new \InvalidStateException("The default level cannot be unloaded while running, please switch levels.");
+		}
 		if($level->unload($forceUnload) === true){
 			unset($this->levels[$level->getId()]);