From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: ishland <ishlandmc@yeah.net>
Date: Sun, 23 Aug 2020 10:57:44 +0200
Subject: [PATCH] Fix MC-197271

This patch only fixes an issue for servers running OpenJ9.

diff --git a/src/main/java/net/minecraft/data/RegistryGeneration.java b/src/main/java/net/minecraft/data/RegistryGeneration.java
index 25762daca063ff5a422975d7fe64752a2deae163..2c06e3ab167443ac54c27cfe09e279f18a9f7300 100644
--- a/src/main/java/net/minecraft/data/RegistryGeneration.java
+++ b/src/main/java/net/minecraft/data/RegistryGeneration.java
@@ -48,11 +48,11 @@ public class RegistryGeneration {
     public static final IRegistry<ProcessorList> g = a(IRegistry.aw, () -> {
         return ProcessorLists.b;
     });
-    public static final IRegistry<WorldGenFeatureDefinedStructurePoolTemplate> h = a(IRegistry.ax, WorldGenFeaturePieces::a);
+    public static final IRegistry<WorldGenFeatureDefinedStructurePoolTemplate> h = a(IRegistry.ax, () -> WorldGenFeaturePieces.a()); // Paper - MC-197271
     public static final IRegistry<BiomeBase> WORLDGEN_BIOME = a(IRegistry.ay, () -> {
         return BiomeRegistry.a;
     });
-    public static final IRegistry<GeneratorSettingBase> j = a(IRegistry.ar, GeneratorSettingBase::i);
+    public static final IRegistry<GeneratorSettingBase> j = a(IRegistry.ar, () -> GeneratorSettingBase.i()); // Paper - MC-197271
 
     private static <T> IRegistry<T> a(ResourceKey<? extends IRegistry<T>> resourcekey, Supplier<T> supplier) {
         return a(resourcekey, Lifecycle.stable(), supplier);
@@ -66,9 +66,9 @@ public class RegistryGeneration {
         MinecraftKey minecraftkey = resourcekey.a();
 
         RegistryGeneration.k.put(minecraftkey, supplier);
-        IRegistryWritable<R> iregistrywritable = RegistryGeneration.l;
+        IRegistryWritable<R> iregistrywritable = (IRegistryWritable<R>) RegistryGeneration.l; // Paper - decompile fix
 
-        return (IRegistryWritable) iregistrywritable.a(resourcekey, (Object) r0, lifecycle);
+        return (R) iregistrywritable.a((ResourceKey<R>) resourcekey, r0, lifecycle); // Paper - decompile fix
     }
 
     public static <T> T a(IRegistry<? super T> iregistry, String s, T t0) {
@@ -76,11 +76,11 @@ public class RegistryGeneration {
     }
 
     public static <V, T extends V> T a(IRegistry<V> iregistry, MinecraftKey minecraftkey, T t0) {
-        return ((IRegistryWritable) iregistry).a(ResourceKey.a(iregistry.f(), minecraftkey), t0, Lifecycle.stable());
+        return (T) ((IRegistryWritable) iregistry).a(ResourceKey.a(iregistry.f(), minecraftkey), t0, Lifecycle.stable()); // Paper - decompile fix
     }
 
     public static <V, T extends V> T a(IRegistry<V> iregistry, int i, ResourceKey<V> resourcekey, T t0) {
-        return ((IRegistryWritable) iregistry).a(i, resourcekey, t0, Lifecycle.stable());
+        return (T) ((IRegistryWritable) iregistry).a(i, resourcekey, t0, Lifecycle.stable()); // Paper - decompile fix
     }
 
     public static void a() {}