From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 28 Oct 2023 23:21:49 -0700
Subject: [PATCH] Fix NPE when no valid world is found on legacy Players


diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 03d2dc7f68d6918065f852057321fbaaf22fb413..30dd56871acff2dd730d96406520bab066229d7a 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -221,9 +221,9 @@ public abstract class PlayerList {
             Logger logger = PlayerList.LOGGER;
 
             Objects.requireNonNull(logger);
-            resourcekey = (ResourceKey) dataresult.resultOrPartial(logger::error).orElse(player.serverLevel().dimension()); // CraftBukkit - SPIGOT-7507: If no dimension, fall back to existing dimension loaded from "WorldUUID", which in turn defaults to World.OVERWORLD
+            resourcekey = (ResourceKey) dataresult.resultOrPartial(logger::error).orElse(player.serverLevel() != null ? player.serverLevel().dimension() : Level.OVERWORLD); // CraftBukkit - SPIGOT-7507: If no dimension, fall back to existing dimension loaded from "WorldUUID", which in turn defaults to World.OVERWORLD // Paper - account for null level
         } else {
-            resourcekey = player.serverLevel().dimension(); // CraftBukkit - SPIGOT-7507: If no dimension, fall back to existing dimension loaded from "WorldUUID", which in turn defaults to World.OVERWORLD
+            resourcekey = player.serverLevel() != null ? player.serverLevel().dimension() : Level.OVERWORLD; // CraftBukkit - SPIGOT-7507: If no dimension, fall back to existing dimension loaded from "WorldUUID", which in turn defaults to World.OVERWORLD // Paper - account for null level
         }
 
         ResourceKey<Level> resourcekey1 = resourcekey;