Create 1042-Fix-fetching-biomes-during-world-gen.patch

patches/server/1042-Fix-fetching-biomes-during-world-gen.patch

@@ -0,0 +1,30 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Newwind <support@newwindserver.com>
+Date: Sat, 13 Jul 2024 18:00:37 +0200
+Subject: [PATCH] Fix fetching biomes during world generation
+
+getNoiseBiome() on LevelReader first attempts to getChunk() to get its cached noise biome,
+however, calling getChunk() on WorldGenRegion will cause a crash if the chunk isn't found
+"Requested chunk unavailable during world generation"
+This means features which attempt to fetch biomes during generation, such as LakeFeature,
+can cause the server to crash. This patch simply removes chunk lookups from getNoiseBiome()
+for WorldGenRegion by overriding the method.
+
+diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
+index 5a8a33638..dfbdf0c62 100644
+--- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java
++++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java
+@@ -145,6 +145,13 @@ public class WorldGenRegion implements WorldGenLevel {
+         return this.getChunk(chunkX, chunkZ, ChunkStatus.EMPTY);
+     }
+
++    // Paper start - Always use uncached noise to get biomes in WorldGenRegion
++    @Override
++    public Holder<Biome> getNoiseBiome(int biomeX, int biomeY, int biomeZ) {
++        return this.getUncachedNoiseBiome(biomeX, biomeY, biomeZ);
++    }
++    // Paper end
++
+     @Nullable
+     @Override
+     public ChunkAccess getChunk(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) {