From e7ae9977cb612b6047302839a803792f2a8a20b5 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 30 Mar 2016 19:36:20 -0400
Subject: [PATCH] MC Dev fixes


diff --git a/src/main/java/net/minecraft/server/BiomeBase.java b/src/main/java/net/minecraft/server/BiomeBase.java
index 26fa6e7b6..9a839d654 100644
--- a/src/main/java/net/minecraft/server/BiomeBase.java
+++ b/src/main/java/net/minecraft/server/BiomeBase.java
@@ -42,7 +42,7 @@ public abstract class BiomeBase {
 
     @Nullable
     public static BiomeBase a(BiomeBase biomebase) {
-        return (BiomeBase) BiomeBase.c.fromId(IRegistry.BIOME.a((Object) biomebase));
+        return (BiomeBase) BiomeBase.c.fromId(IRegistry.BIOME.a(biomebase)); // Paper - decompile fix
     }
 
     public static <C extends WorldGenCarverConfiguration> WorldGenCarverWrapper<C> a(WorldGenCarverAbstract<C> worldgencarverabstract, C c0) {
@@ -202,7 +202,7 @@ public abstract class BiomeBase {
 
     @Nullable
     public <C extends WorldGenFeatureConfiguration> C b(StructureGenerator<C> structuregenerator) {
-        return (WorldGenFeatureConfiguration) this.t.get(structuregenerator);
+        return (C) this.t.get(structuregenerator); // Paper - decompile fix
     }
 
     public List<WorldGenFeatureConfigured<?>> e() {
diff --git a/src/main/java/net/minecraft/server/BlockDataAbstract.java b/src/main/java/net/minecraft/server/BlockDataAbstract.java
index adc998186..c385c7b0b 100644
--- a/src/main/java/net/minecraft/server/BlockDataAbstract.java
+++ b/src/main/java/net/minecraft/server/BlockDataAbstract.java
@@ -29,7 +29,7 @@ public abstract class BlockDataAbstract<O, S> implements IBlockDataHolder<S> {
         }
 
         private <T extends Comparable<T>> String a(IBlockState<T> iblockstate, Comparable<?> comparable) {
-            return iblockstate.a(comparable);
+            return iblockstate.a((T) comparable); // Paper - decompiler fix
         }
     };
     protected final O a;
@@ -44,11 +44,11 @@ public abstract class BlockDataAbstract<O, S> implements IBlockDataHolder<S> {
     }
 
     public <T extends Comparable<T>> S a(IBlockState<T> iblockstate) {
-        return this.set(iblockstate, (Comparable) a(iblockstate.d(), this.get(iblockstate)));
+        return this.set(iblockstate, a(iblockstate.d(), this.get(iblockstate))); // Paper - decompiler fix
     }
 
     protected static <T> T a(Collection<T> collection, T t0) {
-        Iterator iterator = collection.iterator();
+        Iterator<T> iterator = collection.iterator(); // Paper - decompiler fix
 
         do {
             if (!iterator.hasNext()) {
@@ -91,7 +91,7 @@ public abstract class BlockDataAbstract<O, S> implements IBlockDataHolder<S> {
         if (comparable == null) {
             throw new IllegalArgumentException("Cannot get property " + iblockstate + " as it does not exist in " + this.a);
         } else {
-            return (Comparable) iblockstate.b().cast(comparable);
+            return iblockstate.b().cast(comparable); // Paper - decompiler fix
         }
     }
 
@@ -102,7 +102,7 @@ public abstract class BlockDataAbstract<O, S> implements IBlockDataHolder<S> {
         if (comparable == null) {
             throw new IllegalArgumentException("Cannot set property " + iblockstate + " as it does not exist in " + this.a);
         } else if (comparable == v0) {
-            return this;
+            return (S) this; // Paper - decompiler fix
         } else {
             S s0 = this.f.get(iblockstate, v0);
 
diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
index f0ff70980..dd47e9cbe 100644
--- a/src/main/java/net/minecraft/server/BlockPosition.java
+++ b/src/main/java/net/minecraft/server/BlockPosition.java
@@ -57,12 +57,12 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
         OfInt ofint = dynamic.asIntStream().spliterator();
         int[] aint = new int[3];
 
-        if (ofint.tryAdvance((i) -> {
+        if (ofint.tryAdvance((Consumer<? super Integer>) (i) -> { // Paper - decomile fix
             aint[0] = i;
-        }) && ofint.tryAdvance((i) -> {
+        }) && ofint.tryAdvance((Consumer<? super Integer>) (i) -> { // Paper - decompile fix
             aint[1] = i;
         })) {
-            ofint.tryAdvance((i) -> {
+            ofint.tryAdvance((Consumer<? super Integer>) (i) -> { // Paper - decompile fix
                 aint[2] = i;
             });
         }
diff --git a/src/main/java/net/minecraft/server/BlockStateEnum.java b/src/main/java/net/minecraft/server/BlockStateEnum.java
index b4c8722f0..59d86fc66 100644
--- a/src/main/java/net/minecraft/server/BlockStateEnum.java
+++ b/src/main/java/net/minecraft/server/BlockStateEnum.java
@@ -20,10 +20,10 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends BlockState<T>
     protected BlockStateEnum(String s, Class<T> oclass, Collection<T> collection) {
         super(s, oclass);
         this.a = ImmutableSet.copyOf(collection);
-        Iterator iterator = collection.iterator();
+        Iterator<T> iterator = collection.iterator(); // Paper - decompile fix
 
         while (iterator.hasNext()) {
-            T t0 = (Enum) iterator.next();
+            T t0 = iterator.next(); // Paper - Decompile fix
             String s1 = ((INamable) t0).getName();
 
             if (this.b.containsKey(s1)) {
diff --git a/src/main/java/net/minecraft/server/ChunkSection.java b/src/main/java/net/minecraft/server/ChunkSection.java
index c973ab607..30701fd7f 100644
--- a/src/main/java/net/minecraft/server/ChunkSection.java
+++ b/src/main/java/net/minecraft/server/ChunkSection.java
@@ -148,6 +148,6 @@ public class ChunkSection {
     }
 
     public boolean a(IBlockData iblockdata) {
-        return this.blockIds.a((Object) iblockdata);
+        return this.blockIds.a(iblockdata); // Paper - decompile fix
     }
 }
diff --git a/src/main/java/net/minecraft/server/EntityFox.java b/src/main/java/net/minecraft/server/EntityFox.java
index 199f67490..c7a744355 100644
--- a/src/main/java/net/minecraft/server/EntityFox.java
+++ b/src/main/java/net/minecraft/server/EntityFox.java
@@ -97,7 +97,7 @@ public class EntityFox extends EntityAnimal {
         this.goalSelector.a(11, new EntityFox.j(this, EntityHuman.class, 24.0F));
         this.goalSelector.a(12, new EntityFox.r());
         this.targetSelector.a(3, new EntityFox.a(EntityLiving.class, false, false, (entityliving) -> {
-            return EntityFox.bF.test(entityliving) && !this.c(entityliving.getUniqueID());
+            return EntityFox.bF.test((EntityLiving) entityliving) && !this.c(((EntityLiving) entityliving).getUniqueID()); // Paper - decompile fix
         }));
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityVindicator.java b/src/main/java/net/minecraft/server/EntityVindicator.java
index 1692e6b47..dbd189afe 100644
--- a/src/main/java/net/minecraft/server/EntityVindicator.java
+++ b/src/main/java/net/minecraft/server/EntityVindicator.java
@@ -25,7 +25,7 @@ public class EntityVindicator extends EntityIllagerAbstract {
         this.goalSelector.a(2, new EntityIllagerAbstract.b(this));
         this.goalSelector.a(3, new EntityRaider.a(this, 10.0F));
         this.goalSelector.a(4, new EntityVindicator.c(this));
-        this.targetSelector.a(1, (new PathfinderGoalHurtByTarget(this, new Class[] { EntityRaider.class})).a());
+        this.targetSelector.a(1, (new PathfinderGoalHurtByTarget(this, new Class[] { EntityRaider.class})).a(new Class[0])); // Paper - decompile fix
         this.targetSelector.a(2, new PathfinderGoalNearestAttackableTarget<>(this, EntityHuman.class, true));
         this.targetSelector.a(3, new PathfinderGoalNearestAttackableTarget<>(this, EntityVillagerAbstract.class, true));
         this.targetSelector.a(3, new PathfinderGoalNearestAttackableTarget<>(this, EntityIronGolem.class, true));
diff --git a/src/main/java/net/minecraft/server/GameRules.java b/src/main/java/net/minecraft/server/GameRules.java
index d8d226708..3de9d264d 100644
--- a/src/main/java/net/minecraft/server/GameRules.java
+++ b/src/main/java/net/minecraft/server/GameRules.java
@@ -17,7 +17,7 @@ import javax.annotation.Nullable;
 
 public class GameRules {
 
-    private static final TreeMap<String, GameRules.GameRuleDefinition> a = (TreeMap) SystemUtils.a((Object) (new TreeMap()), (treemap) -> {
+    private static final TreeMap<String, GameRules.GameRuleDefinition> a = SystemUtils.a(new TreeMap(), (treemap) -> { // Paper - decompile fix
         treemap.put("doFireTick", new GameRules.GameRuleDefinition("true", GameRules.EnumGameRuleType.BOOLEAN_VALUE));
         treemap.put("mobGriefing", new GameRules.GameRuleDefinition("true", GameRules.EnumGameRuleType.BOOLEAN_VALUE));
         treemap.put("keepInventory", new GameRules.GameRuleDefinition("false", GameRules.EnumGameRuleType.BOOLEAN_VALUE));
@@ -133,7 +133,7 @@ public class GameRules {
         private final Supplier<ArgumentType<?>> d;
         private final BiFunction<CommandContext<CommandListenerWrapper>, String, String> e;
 
-        private EnumGameRuleType(Supplier supplier, BiFunction bifunction) {
+        private EnumGameRuleType(Supplier supplier, BiFunction<CommandContext<CommandListenerWrapper>, String, String> bifunction) { // Paper - decompile fix
             this.d = supplier;
             this.e = bifunction;
         }
diff --git a/src/main/java/net/minecraft/server/IAsyncTaskHandler.java b/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
index 053d408d3..4510018d6 100644
--- a/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
+++ b/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
@@ -51,7 +51,7 @@ public abstract class IAsyncTaskHandler<R extends Runnable> implements Mailbox<R
             return this.executeFuture(runnable);
         } else {
             runnable.run();
-            return CompletableFuture.completedFuture((Object) null);
+            return CompletableFuture.completedFuture(null); // Paper - decompile fix
         }
     }
 
@@ -86,14 +86,14 @@ public abstract class IAsyncTaskHandler<R extends Runnable> implements Mailbox<R
     }
 
     protected boolean executeNext() {
-        R r0 = (Runnable) this.d.peek();
+        R r0 = this.d.peek(); // Paper - decompile fix
 
         if (r0 == null) {
             return false;
         } else if (this.e == 0 && !this.canExecute(r0)) {
             return false;
         } else {
-            this.executeTask((Runnable) this.d.remove());
+            this.executeTask(this.d.remove()); // Paper - decompile fix
             return true;
         }
     }
diff --git a/src/main/java/net/minecraft/server/IBlockAccess.java b/src/main/java/net/minecraft/server/IBlockAccess.java
index 2ed611980..6e365f402 100644
--- a/src/main/java/net/minecraft/server/IBlockAccess.java
+++ b/src/main/java/net/minecraft/server/IBlockAccess.java
@@ -96,7 +96,7 @@ public interface IBlockAccess {
                 double d13 = d10 * (i1 > 0 ? 1.0D - MathHelper.h(d4) : MathHelper.h(d4));
                 double d14 = d11 * (j1 > 0 ? 1.0D - MathHelper.h(d5) : MathHelper.h(d5));
 
-                Object object;
+                T object; // Paper - decompile fix
 
                 do {
                     if (d12 > 1.0D && d13 > 1.0D && d14 > 1.0D) {
diff --git a/src/main/java/net/minecraft/server/IBlockData.java b/src/main/java/net/minecraft/server/IBlockData.java
index e8ae4b5e4..0f4aa698a 100644
--- a/src/main/java/net/minecraft/server/IBlockData.java
+++ b/src/main/java/net/minecraft/server/IBlockData.java
@@ -265,12 +265,12 @@ public class IBlockData extends BlockDataAbstract<Block, IBlockData> implements
 
     public static <T> Dynamic<T> a(DynamicOps<T> dynamicops, IBlockData iblockdata) {
         ImmutableMap<IBlockState<?>, Comparable<?>> immutablemap = iblockdata.getStateMap();
-        Object object;
+        T object; // Paper - decompile fix
 
         if (immutablemap.isEmpty()) {
             object = dynamicops.createMap(ImmutableMap.of(dynamicops.createString("Name"), dynamicops.createString(IRegistry.BLOCK.getKey(iblockdata.getBlock()).toString())));
         } else {
-            object = dynamicops.createMap(ImmutableMap.of(dynamicops.createString("Name"), dynamicops.createString(IRegistry.BLOCK.getKey(iblockdata.getBlock()).toString()), dynamicops.createString("Properties"), dynamicops.createMap((Map) immutablemap.entrySet().stream().map((entry) -> {
+            object = dynamicops.createMap(ImmutableMap.of(dynamicops.createString("Name"), dynamicops.createString(IRegistry.BLOCK.getKey(iblockdata.getBlock()).toString()), dynamicops.createString("Properties"), dynamicops.createMap(immutablemap.entrySet().stream().map((entry) -> { // Paper - decompile fix
                 return Pair.of(dynamicops.createString(((IBlockState) entry.getKey()).a()), dynamicops.createString(IBlockDataHolder.b((IBlockState) entry.getKey(), (Comparable) entry.getValue())));
             }).collect(Collectors.toMap(Pair::getFirst, Pair::getSecond)))));
         }
@@ -329,9 +329,9 @@ public class IBlockData extends BlockDataAbstract<Block, IBlockData> implements
             if (!iblockdata.o()) {
                 this.f = null;
             } else {
-                this.f = new VoxelShape[IBlockData.a.a.length];
+                this.f = new VoxelShape[a.length]; // Paper - decompile fix
                 voxelshape = block.h(iblockdata, BlockAccessAir.INSTANCE, BlockPosition.ZERO);
-                EnumDirection[] aenumdirection = IBlockData.a.a;
+                EnumDirection[] aenumdirection = a; // Paper - decompile fix
                 int i = aenumdirection.length;
 
                 for (int j = 0; j < i; ++j) {
@@ -342,8 +342,9 @@ public class IBlockData extends BlockDataAbstract<Block, IBlockData> implements
             }
 
             voxelshape = block.b(iblockdata, BlockAccessAir.INSTANCE, BlockPosition.ZERO, VoxelShapeCollision.a());
+            final VoxelShape final_voxelshape = voxelshape; // Paper - decompile fix
             this.g = Arrays.stream(EnumDirection.EnumAxis.values()).anyMatch((enumdirection_enumaxis) -> {
-                return voxelshape.b(enumdirection_enumaxis) < 0.0D || voxelshape.c(enumdirection_enumaxis) > 1.0D;
+                return final_voxelshape.b(enumdirection_enumaxis) < 0.0D || final_voxelshape.c(enumdirection_enumaxis) > 1.0D; // Paper - decompile fix
             });
         }
     }
diff --git a/src/main/java/net/minecraft/server/IEntityAccess.java b/src/main/java/net/minecraft/server/IEntityAccess.java
index bf7e0d17e..ee22bb038 100644
--- a/src/main/java/net/minecraft/server/IEntityAccess.java
+++ b/src/main/java/net/minecraft/server/IEntityAccess.java
@@ -147,17 +147,17 @@ public interface IEntityAccess {
 
     @Nullable
     default <T extends EntityLiving> T a(Class<? extends T> oclass, PathfinderTargetCondition pathfindertargetcondition, @Nullable EntityLiving entityliving, double d0, double d1, double d2, AxisAlignedBB axisalignedbb) {
-        return this.a(this.a(oclass, axisalignedbb, (Predicate) null), pathfindertargetcondition, entityliving, d0, d1, d2);
+        return this.a(this.a(oclass, axisalignedbb, null), pathfindertargetcondition, entityliving, d0, d1, d2); // Paper - decompile fix
     }
 
     @Nullable
     default <T extends EntityLiving> T a(List<? extends T> list, PathfinderTargetCondition pathfindertargetcondition, @Nullable EntityLiving entityliving, double d0, double d1, double d2) {
         double d3 = -1.0D;
         T t0 = null;
-        Iterator iterator = list.iterator();
+        Iterator<? extends T> iterator = list.iterator(); // Paper - decompile fix
 
         while (iterator.hasNext()) {
-            T t1 = (EntityLiving) iterator.next();
+            T t1 = iterator.next(); // Paper - decompile fix
 
             if (pathfindertargetcondition.a(entityliving, t1)) {
                 double d4 = t1.e(d0, d1, d2);
@@ -190,10 +190,10 @@ public interface IEntityAccess {
     default <T extends EntityLiving> List<T> a(Class<? extends T> oclass, PathfinderTargetCondition pathfindertargetcondition, EntityLiving entityliving, AxisAlignedBB axisalignedbb) {
         List<T> list = this.a(oclass, axisalignedbb, (Predicate) null);
         List<T> list1 = Lists.newArrayList();
-        Iterator iterator = list.iterator();
+        Iterator<T> iterator = list.iterator(); // Paper - decompile fix
 
         while (iterator.hasNext()) {
-            T t0 = (EntityLiving) iterator.next();
+            T t0 = iterator.next(); // Paper - decompile fix
 
             if (pathfindertargetcondition.a(entityliving, t0)) {
                 list1.add(t0);
diff --git a/src/main/java/net/minecraft/server/LootSelectorEntry.java b/src/main/java/net/minecraft/server/LootSelectorEntry.java
index 929053491..1016325bd 100644
--- a/src/main/java/net/minecraft/server/LootSelectorEntry.java
+++ b/src/main/java/net/minecraft/server/LootSelectorEntry.java
@@ -127,7 +127,7 @@ public abstract class LootSelectorEntry extends LootEntryAbstract {
         @Override
         public T b(LootItemFunction.a lootitemfunction_a) {
             this.c.add(lootitemfunction_a.b());
-            return (LootSelectorEntry.a) this.d();
+            return this.d(); // Paper - decompile fix
         }
 
         protected LootItemFunction[] a() {
@@ -136,12 +136,12 @@ public abstract class LootSelectorEntry extends LootEntryAbstract {
 
         public T a(int i) {
             this.a = i;
-            return (LootSelectorEntry.a) this.d();
+            return this.d(); // Paper - decompile fix
         }
 
         public T b(int i) {
             this.b = i;
-            return (LootSelectorEntry.a) this.d();
+            return this.d(); // Paper - decompile fix
         }
     }
 
diff --git a/src/main/java/net/minecraft/server/NBTBase.java b/src/main/java/net/minecraft/server/NBTBase.java
index cb0c08a14..9aabcb630 100644
--- a/src/main/java/net/minecraft/server/NBTBase.java
+++ b/src/main/java/net/minecraft/server/NBTBase.java
@@ -88,7 +88,7 @@ public interface NBTBase {
         }
     }
 
-    NBTBase clone();
+    public NBTBase clone(); // Paper - decompile fix
 
     default String asString() {
         return this.toString();
diff --git a/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
index 0dda7aaf6..4e20cfba4 100644
--- a/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
+++ b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
@@ -134,7 +134,7 @@ public class PacketPlayOutMapChunk implements Packet<PacketListenerPlayOut> {
             BiomeBase[] abiomebase = chunk.getBiomeIndex();
 
             for (l = 0; l < abiomebase.length; ++l) {
-                packetdataserializer.writeInt(IRegistry.BIOME.a((Object) abiomebase[l]));
+                packetdataserializer.writeInt(IRegistry.BIOME.a(abiomebase[l])); // Paper - decompile fix
             }
         }
 
diff --git a/src/main/java/net/minecraft/server/RegistryBlockID.java b/src/main/java/net/minecraft/server/RegistryBlockID.java
index 7f89562e9..4efcb8b59 100644
--- a/src/main/java/net/minecraft/server/RegistryBlockID.java
+++ b/src/main/java/net/minecraft/server/RegistryBlockID.java
@@ -27,7 +27,7 @@ public class RegistryBlockID<T> implements Registry<T> {
         this.b.put(t0, i);
 
         while (this.c.size() <= i) {
-            this.c.add((Object) null);
+            this.c.add(null); // Paper - decompile fix
         }
 
         this.c.set(i, t0);
diff --git a/src/main/java/net/minecraft/server/RegistryID.java b/src/main/java/net/minecraft/server/RegistryID.java
index 4cb78c6a3..e15d28671 100644
--- a/src/main/java/net/minecraft/server/RegistryID.java
+++ b/src/main/java/net/minecraft/server/RegistryID.java
@@ -17,9 +17,9 @@ public class RegistryID<K> implements Registry<K> {
 
     public RegistryID(int i) {
         i = (int) ((float) i / 0.8F);
-        this.b = (Object[]) (new Object[i]);
+        this.b = (K[]) (new Object[i]); // Paper - decompile fix
         this.c = new int[i];
-        this.d = (Object[]) (new Object[i]);
+        this.d = (K[]) (new Object[i]); // Paper - decompile fix
     }
 
     public int getId(@Nullable K k0) {
@@ -55,9 +55,9 @@ public class RegistryID<K> implements Registry<K> {
         K[] ak = this.b;
         int[] aint = this.c;
 
-        this.b = (Object[]) (new Object[i]);
+        this.b = (K[]) (new Object[i]); // Paper - decompile fix
         this.c = new int[i];
-        this.d = (Object[]) (new Object[i]);
+        this.d = (K[]) (new Object[i]); // Paper - decompile fix
         this.e = 0;
         this.f = 0;
 
diff --git a/src/main/java/net/minecraft/server/SystemUtils.java b/src/main/java/net/minecraft/server/SystemUtils.java
index 41a5d1dc2..b3799ab56 100644
--- a/src/main/java/net/minecraft/server/SystemUtils.java
+++ b/src/main/java/net/minecraft/server/SystemUtils.java
@@ -45,8 +45,8 @@ public class SystemUtils {
         return Collectors.toMap(Entry::getKey, Entry::getValue);
     }
 
-    public static <T extends Comparable<T>> String a(IBlockState<T> iblockstate, Object object) {
-        return iblockstate.a((Comparable) object);
+    public static <T extends Comparable<T>> String a(IBlockState<T> iblockstate, T object) { // Paper - decompile fix
+        return iblockstate.a(object); // Paper - decompile fix
     }
 
     public static String a(String s, @Nullable MinecraftKey minecraftkey) {
@@ -154,8 +154,8 @@ public class SystemUtils {
     public static <T> T b(Iterable<T> iterable, @Nullable T t0) {
         Iterator<T> iterator = iterable.iterator();
 
-        Object object;
-        Object object1;
+        T object; // Paper - decompile fix
+        T object1; // Paper - decompile fix
 
         for (object1 = null; iterator.hasNext(); object1 = object) {
             object = iterator.next();
@@ -180,7 +180,7 @@ public class SystemUtils {
     }
 
     public static <K> Strategy<K> i() {
-        return SystemUtils.IdentityHashingStrategy.INSTANCE;
+        return (Strategy<K>) SystemUtils.IdentityHashingStrategy.INSTANCE; // Paper - decompile fix
     }
 
     public static <V> CompletableFuture<List<V>> b(List<? extends CompletableFuture<? extends V>> list) {
@@ -191,7 +191,7 @@ public class SystemUtils {
         list.forEach((completablefuture1) -> {
             int i = list1.size();
 
-            list1.add((Object) null);
+            list1.add(null); // Paper - decompile fix
             acompletablefuture[i] = completablefuture1.whenComplete((object, throwable) -> {
                 if (throwable != null) {
                     completablefuture.completeExceptionally(throwable);
diff --git a/src/main/java/net/minecraft/server/VillagerTrades.java b/src/main/java/net/minecraft/server/VillagerTrades.java
index b0d44e377..ff3f15eac 100644
--- a/src/main/java/net/minecraft/server/VillagerTrades.java
+++ b/src/main/java/net/minecraft/server/VillagerTrades.java
@@ -15,12 +15,12 @@ import javax.annotation.Nullable;
 
 public class VillagerTrades {
 
-    public static final Map<VillagerProfession, Int2ObjectMap<VillagerTrades.IMerchantRecipeOption[]>> a = (Map) SystemUtils.a((Object) Maps.newHashMap(), (hashmap) -> {
+    public static final Map<VillagerProfession, Int2ObjectMap<VillagerTrades.IMerchantRecipeOption[]>> a = SystemUtils.a(Maps.newHashMap(), (hashmap) -> { // Paper - decompile fix
         hashmap.put(VillagerProfession.FARMER, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.WHEAT, 20, 8, 2), new VillagerTrades.b(Items.POTATO, 26, 8, 2), new VillagerTrades.b(Items.CARROT, 22, 8, 2), new VillagerTrades.b(Items.BEETROOT, 15, 8, 2), new VillagerTrades.h(Items.BREAD, 1, 6, 8, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Blocks.PUMPKIN, 6, 6, 10), new VillagerTrades.h(Items.PUMPKIN_PIE, 1, 4, 5), new VillagerTrades.h(Items.APPLE, 1, 4, 8, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.COOKIE, 3, 18, 10), new VillagerTrades.b(Blocks.MELON, 4, 6, 20)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Blocks.CAKE, 1, 1, 6, 15), new VillagerTrades.i(MobEffects.FASTER_MOVEMENT, 160, 15), new VillagerTrades.i(MobEffects.JUMP, 160, 15), new VillagerTrades.i(MobEffects.WEAKNESS, 140, 15), new VillagerTrades.i(MobEffects.BLINDNESS, 120, 15), new VillagerTrades.i(MobEffects.POISON, 280, 15), new VillagerTrades.i(MobEffects.SATURATION, 7, 15)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.GOLDEN_CARROT, 3, 3, 30), new VillagerTrades.h(Items.GLISTERING_MELON_SLICE, 4, 3, 30)})));
-        hashmap.put(VillagerProfession.FISHERMAN, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.STRING, 20, 8, 2), new VillagerTrades.b(Items.COAL, 10, 8, 2), new VillagerTrades.g(Items.COD, 6, Items.COOKED_COD, 6, 8, 1), new VillagerTrades.h(Items.COD_BUCKET, 3, 1, 8, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.COD, 15, 8, 10), new VillagerTrades.g(Items.SALMON, 6, Items.COOKED_SALMON, 6, 8, 5), new VillagerTrades.h(Items.pS, 2, 1, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.SALMON, 13, 8, 20), new VillagerTrades.e(Items.FISHING_ROD, 3, 2, 10, 0.2F)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.TROPICAL_FISH, 6, 6, 30)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.PUFFERFISH, 4, 6, 30), new VillagerTrades.c(1, 6, 30, ImmutableMap.builder().put(VillagerType.PLAINS, Items.OAK_BOAT).put(VillagerType.TAIGA, Items.SPRUCE_BOAT).put(VillagerType.SNOW, Items.SPRUCE_BOAT).put(VillagerType.DESERT, Items.JUNGLE_BOAT).put(VillagerType.JUNGLE, Items.JUNGLE_BOAT).put(VillagerType.SAVANNA, Items.ACACIA_BOAT).put(VillagerType.SWAMP, Items.DARK_OAK_BOAT).build())})));
+        hashmap.put(VillagerProfession.FISHERMAN, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.STRING, 20, 8, 2), new VillagerTrades.b(Items.COAL, 10, 8, 2), new VillagerTrades.g(Items.COD, 6, Items.COOKED_COD, 6, 8, 1), new VillagerTrades.h(Items.COD_BUCKET, 3, 1, 8, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.COD, 15, 8, 10), new VillagerTrades.g(Items.SALMON, 6, Items.COOKED_SALMON, 6, 8, 5), new VillagerTrades.h(Items.pS, 2, 1, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.SALMON, 13, 8, 20), new VillagerTrades.e(Items.FISHING_ROD, 3, 2, 10, 0.2F)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.TROPICAL_FISH, 6, 6, 30)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.PUFFERFISH, 4, 6, 30), new VillagerTrades.c(1, 6, 30, ImmutableMap.<VillagerType, Item>builder().put(VillagerType.PLAINS, Items.OAK_BOAT).put(VillagerType.TAIGA, Items.SPRUCE_BOAT).put(VillagerType.SNOW, Items.SPRUCE_BOAT).put(VillagerType.DESERT, Items.JUNGLE_BOAT).put(VillagerType.JUNGLE, Items.JUNGLE_BOAT).put(VillagerType.SAVANNA, Items.ACACIA_BOAT).put(VillagerType.SWAMP, Items.DARK_OAK_BOAT).build())})));  // Paper - decompile fix
         hashmap.put(VillagerProfession.SHEPHERD, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Blocks.WHITE_WOOL, 18, 8, 2), new VillagerTrades.b(Blocks.BROWN_WOOL, 18, 8, 2), new VillagerTrades.b(Blocks.BLACK_WOOL, 18, 8, 2), new VillagerTrades.b(Blocks.GRAY_WOOL, 18, 8, 2), new VillagerTrades.h(Items.SHEARS, 2, 1, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.WHITE_DYE, 12, 8, 10), new VillagerTrades.b(Items.GRAY_DYE, 12, 8, 10), new VillagerTrades.b(Items.BLACK_DYE, 12, 8, 10), new VillagerTrades.b(Items.LIGHT_BLUE_DYE, 12, 8, 10), new VillagerTrades.b(Items.LIME_DYE, 12, 8, 10), new VillagerTrades.h(Blocks.WHITE_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.ORANGE_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.MAGENTA_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.LIGHT_BLUE_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.YELLOW_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.LIME_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.PINK_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.GRAY_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.LIGHT_GRAY_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.CYAN_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.PURPLE_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.BLUE_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.BROWN_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.GREEN_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.RED_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.BLACK_WOOL, 1, 1, 8, 5), new VillagerTrades.h(Blocks.WHITE_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.ORANGE_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.MAGENTA_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.LIGHT_BLUE_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.YELLOW_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.LIME_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.PINK_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.GRAY_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.LIGHT_GRAY_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.CYAN_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.PURPLE_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.BLUE_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.BROWN_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.GREEN_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.RED_CARPET, 1, 4, 8, 5), new VillagerTrades.h(Blocks.BLACK_CARPET, 1, 4, 8, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.YELLOW_DYE, 12, 8, 20), new VillagerTrades.b(Items.LIGHT_GRAY_DYE, 12, 8, 20), new VillagerTrades.b(Items.ORANGE_DYE, 12, 8, 20), new VillagerTrades.b(Items.RED_DYE, 12, 8, 20), new VillagerTrades.b(Items.PINK_DYE, 12, 8, 20), new VillagerTrades.h(Blocks.WHITE_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.YELLOW_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.RED_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.BLACK_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.BLUE_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.BROWN_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.CYAN_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.GRAY_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.GREEN_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.LIGHT_BLUE_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.LIGHT_GRAY_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.LIME_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.MAGENTA_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.ORANGE_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.PINK_BED, 3, 1, 6, 10), new VillagerTrades.h(Blocks.PURPLE_BED, 3, 1, 6, 10)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.BROWN_DYE, 12, 8, 30), new VillagerTrades.b(Items.PURPLE_DYE, 12, 8, 30), new VillagerTrades.b(Items.BLUE_DYE, 12, 8, 30), new VillagerTrades.b(Items.GREEN_DYE, 12, 8, 30), new VillagerTrades.b(Items.MAGENTA_DYE, 12, 8, 30), new VillagerTrades.b(Items.CYAN_DYE, 12, 8, 30), new VillagerTrades.h(Items.WHITE_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.BLUE_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.LIGHT_BLUE_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.RED_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.PINK_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.GREEN_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.LIME_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.GRAY_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.BLACK_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.PURPLE_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.MAGENTA_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.CYAN_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.BROWN_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.YELLOW_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.ORANGE_BANNER, 3, 1, 6, 15), new VillagerTrades.h(Items.LIGHT_GRAY_BANNER, 3, 1, 6, 15)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.PAINTING, 2, 3, 30)})));
         hashmap.put(VillagerProfession.FLETCHER, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.STICK, 32, 8, 2), new VillagerTrades.h(Items.ARROW, 1, 16, 1), new VillagerTrades.g(Blocks.GRAVEL, 10, Items.FLINT, 10, 6, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.FLINT, 26, 6, 10), new VillagerTrades.h(Items.BOW, 2, 1, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.STRING, 14, 8, 20), new VillagerTrades.h(Items.CROSSBOW, 3, 1, 10)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.FEATHER, 24, 8, 30), new VillagerTrades.e(Items.BOW, 2, 2, 15)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.dE, 8, 6, 30), new VillagerTrades.e(Items.CROSSBOW, 3, 2, 15), new VillagerTrades.j(Items.ARROW, 5, Items.TIPPED_ARROW, 5, 2, 6, 30)})));
-        hashmap.put(VillagerProfession.LIBRARIAN, a(ImmutableMap.builder().put(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.PAPER, 24, 8, 2), new VillagerTrades.d(1), new VillagerTrades.h(Blocks.BOOKSHELF, 6, 3, 6, 1)}).put(2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.BOOK, 4, 6, 10), new VillagerTrades.d(5), new VillagerTrades.h(Items.pQ, 1, 1, 5)}).put(3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.INK_SAC, 5, 6, 20), new VillagerTrades.d(10), new VillagerTrades.h(Items.am, 1, 4, 10)}).put(4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.WRITABLE_BOOK, 2, 6, 30), new VillagerTrades.d(15), new VillagerTrades.h(Items.CLOCK, 5, 1, 15), new VillagerTrades.h(Items.COMPASS, 4, 1, 15)}).put(5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.NAME_TAG, 20, 1, 30)}).build()));
+        hashmap.put(VillagerProfession.LIBRARIAN, a(ImmutableMap.<Integer, VillagerTrades.IMerchantRecipeOption[]>builder().put(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.PAPER, 24, 8, 2), new VillagerTrades.d(1), new VillagerTrades.h(Blocks.BOOKSHELF, 6, 3, 6, 1)}).put(2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.BOOK, 4, 6, 10), new VillagerTrades.d(5), new VillagerTrades.h(Items.pQ, 1, 1, 5)}).put(3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.INK_SAC, 5, 6, 20), new VillagerTrades.d(10), new VillagerTrades.h(Items.am, 1, 4, 10)}).put(4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.WRITABLE_BOOK, 2, 6, 30), new VillagerTrades.d(15), new VillagerTrades.h(Items.CLOCK, 5, 1, 15), new VillagerTrades.h(Items.COMPASS, 4, 1, 15)}).put(5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.NAME_TAG, 20, 1, 30)}).build())); // Paper - decompile fix
         hashmap.put(VillagerProfession.CARTOGRAPHER, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.PAPER, 24, 8, 2), new VillagerTrades.h(Items.MAP, 7, 1, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.df, 11, 8, 10), new VillagerTrades.k(13, "Monument", MapIcon.Type.MONUMENT, 6, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.COMPASS, 1, 6, 20), new VillagerTrades.k(14, "Mansion", MapIcon.Type.MANSION, 6, 10)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.ITEM_FRAME, 7, 1, 15), new VillagerTrades.h(Items.WHITE_BANNER, 3, 1, 15), new VillagerTrades.h(Items.BLUE_BANNER, 3, 1, 15), new VillagerTrades.h(Items.LIGHT_BLUE_BANNER, 3, 1, 15), new VillagerTrades.h(Items.RED_BANNER, 3, 1, 15), new VillagerTrades.h(Items.PINK_BANNER, 3, 1, 15), new VillagerTrades.h(Items.GREEN_BANNER, 3, 1, 15), new VillagerTrades.h(Items.LIME_BANNER, 3, 1, 15), new VillagerTrades.h(Items.GRAY_BANNER, 3, 1, 15), new VillagerTrades.h(Items.BLACK_BANNER, 3, 1, 15), new VillagerTrades.h(Items.PURPLE_BANNER, 3, 1, 15), new VillagerTrades.h(Items.MAGENTA_BANNER, 3, 1, 15), new VillagerTrades.h(Items.CYAN_BANNER, 3, 1, 15), new VillagerTrades.h(Items.BROWN_BANNER, 3, 1, 15), new VillagerTrades.h(Items.YELLOW_BANNER, 3, 1, 15), new VillagerTrades.h(Items.ORANGE_BANNER, 3, 1, 15), new VillagerTrades.h(Items.LIGHT_GRAY_BANNER, 3, 1, 15)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.h(Items.GLOBE_BANNER_PATTERN, 8, 1, 30)})));
         hashmap.put(VillagerProfession.CLERIC, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.ROTTEN_FLESH, 32, 8, 2), new VillagerTrades.h(Items.REDSTONE, 1, 2, 1)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.GOLD_INGOT, 3, 6, 10), new VillagerTrades.h(Items.LAPIS_LAZULI, 1, 1, 5)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.RABBIT_FOOT, 2, 6, 20), new VillagerTrades.h(Blocks.GLOWSTONE, 4, 1, 6, 10)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.SCUTE, 4, 6, 30), new VillagerTrades.b(Items.GLASS_BOTTLE, 9, 6, 30), new VillagerTrades.h(Items.ENDER_PEARL, 5, 1, 15)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.NETHER_WART, 22, 6, 30), new VillagerTrades.h(Items.EXPERIENCE_BOTTLE, 3, 1, 30)})));
         hashmap.put(VillagerProfession.ARMORER, a(ImmutableMap.of(1, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.COAL, 15, 8, 2), new VillagerTrades.h(new ItemStack(Items.IRON_LEGGINGS), 7, 1, 6, 1, 0.2F), new VillagerTrades.h(new ItemStack(Items.IRON_BOOTS), 4, 1, 6, 1, 0.2F), new VillagerTrades.h(new ItemStack(Items.IRON_HELMET), 5, 1, 6, 1, 0.2F), new VillagerTrades.h(new ItemStack(Items.IRON_CHESTPLATE), 9, 1, 6, 1, 0.2F)}, 2, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.IRON_INGOT, 4, 6, 10), new VillagerTrades.h(new ItemStack(Items.pP), 36, 1, 6, 5, 0.2F), new VillagerTrades.h(new ItemStack(Items.CHAINMAIL_BOOTS), 1, 1, 6, 5, 0.2F), new VillagerTrades.h(new ItemStack(Items.CHAINMAIL_LEGGINGS), 3, 1, 6, 5, 0.2F)}, 3, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.b(Items.LAVA_BUCKET, 1, 6, 20), new VillagerTrades.b(Items.DIAMOND, 1, 6, 20), new VillagerTrades.h(new ItemStack(Items.CHAINMAIL_HELMET), 1, 1, 6, 10, 0.2F), new VillagerTrades.h(new ItemStack(Items.CHAINMAIL_CHESTPLATE), 4, 1, 6, 10, 0.2F), new VillagerTrades.h(new ItemStack(Items.SHIELD), 5, 1, 6, 10, 0.2F)}, 4, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.e(Items.DIAMOND_LEGGINGS, 14, 2, 15, 0.2F), new VillagerTrades.e(Items.DIAMOND_BOOTS, 8, 2, 15, 0.2F)}, 5, new VillagerTrades.IMerchantRecipeOption[] { new VillagerTrades.e(Items.DIAMOND_HELMET, 8, 2, 30, 0.2F), new VillagerTrades.e(Items.DIAMOND_CHESTPLATE, 16, 2, 30, 0.2F)})));
diff --git a/src/main/java/net/minecraft/server/WorldPersistentData.java b/src/main/java/net/minecraft/server/WorldPersistentData.java
index b251a1d7d..3c5b3fe10 100644
--- a/src/main/java/net/minecraft/server/WorldPersistentData.java
+++ b/src/main/java/net/minecraft/server/WorldPersistentData.java
@@ -37,7 +37,7 @@ public class WorldPersistentData {
         if (t0 != null) {
             return t0;
         } else {
-            T t1 = (PersistentBase) supplier.get();
+            T t1 = supplier.get(); // Paper - decompile fix
 
             this.a(t1);
             return t1;
@@ -64,7 +64,7 @@ public class WorldPersistentData {
             }
         }
 
-        return persistentbase;
+        return (T) persistentbase; // Paper - decompile fix
     }
 
     public void a(PersistentBase persistentbase) {
-- 
2.21.0