patches/server/0825-Use-correct-LevelStem-registry-when-loading-default-.patch


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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Sat, 16 Oct 2021 17:38:35 -0700
Subject: [PATCH] Use correct LevelStem registry when loading default
 end/nether


diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 57cb2722e973cfc8edc845bc7154b8b8bbb11e12..5a4172faaf960d48939d6a485719041987df9242 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -641,7 +641,14 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
             long i = generatorsettings.seed();
             long j = BiomeManager.obfuscateSeed(i);
             List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(iworlddataserver));
-            LevelStem worlddimension = (LevelStem) registrymaterials.get(dimensionKey);
+            // Paper start - Use correct LevelStem registry
+            final LevelStem worlddimension;
+            if (dimensionKey == LevelStem.END || dimensionKey == LevelStem.NETHER) {
+                worlddimension = generatorsettings.dimensions().get(dimensionKey);
+            } else {
+                worlddimension = registrymaterials.get(dimensionKey);
+            }
+            // Paper end
             DimensionType dimensionmanager;
             ChunkGenerator chunkgenerator;