From f7d9247d3942f332858b923c956949b5b7e781a1 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Thu, 10 Jan 2019 19:30:37 +0000
Subject: [PATCH] Server: Permit NULL value entries in pocketmine.yml worlds
 this permits listing worlds to load as keys without values.

---
 src/pocketmine/Server.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index 58665af1a..0340b21ac 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -1731,7 +1731,9 @@ class Server{
 			GeneratorManager::registerDefaultGenerators();
 
 			foreach((array) $this->getProperty("worlds", []) as $name => $options){
-				if(!is_array($options)){
+				if($options === null){
+					$options = [];
+				}elseif(!is_array($options)){
 					continue;
 				}
 				if(!$this->loadLevel($name)){