Bump mysql-connector-java from 5.1.45 to 8.0.28 in /sources

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.45 to 8.0.28.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](https://github.com/mysql/mysql-connector-j/compare/5.1.45...8.0.28)

---
updated-dependencies:
- dependency-name: mysql:mysql-connector-java
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

sources/pom.xml

@@ -66,7 +66,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.45</version>
+            <version>8.0.28</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>

sources/src/main/java/net/minecraft/server/BlockChest.java

@@ -0,0 +1,479 @@
+package net.minecraft.server;
+
+import java.util.Iterator;
+import javax.annotation.Nullable;
+
+public class BlockChest extends BlockTileEntity {
+
+    public static final BlockStateDirection FACING = BlockFacingHorizontal.FACING;
+    protected static final AxisAlignedBB b = new AxisAlignedBB(0.0625D, 0.0D, 0.0D, 0.9375D, 0.875D, 0.9375D);
+    protected static final AxisAlignedBB c = new AxisAlignedBB(0.0625D, 0.0D, 0.0625D, 0.9375D, 0.875D, 1.0D);
+    protected static final AxisAlignedBB d = new AxisAlignedBB(0.0D, 0.0D, 0.0625D, 0.9375D, 0.875D, 0.9375D);
+    protected static final AxisAlignedBB e = new AxisAlignedBB(0.0625D, 0.0D, 0.0625D, 1.0D, 0.875D, 0.9375D);
+    protected static final AxisAlignedBB f = new AxisAlignedBB(0.0625D, 0.0D, 0.0625D, 0.9375D, 0.875D, 0.9375D);
+    public final BlockChest.Type g;
+
+    protected BlockChest(BlockChest.Type blockchest_type) {
+        super(Material.WOOD);
+        this.w(this.blockStateList.getBlockData().set(BlockChest.FACING, EnumDirection.NORTH));
+        this.g = blockchest_type;
+        this.a(blockchest_type == BlockChest.Type.TRAP ? CreativeModeTab.d : CreativeModeTab.c);
+    }
+
+    public boolean b(IBlockData iblockdata) {
+        return false;
+    }
+
+    public boolean c(IBlockData iblockdata) {
+        return false;
+    }
+
+    public EnumRenderType a(IBlockData iblockdata) {
+        return EnumRenderType.ENTITYBLOCK_ANIMATED;
+    }
+
+    public AxisAlignedBB b(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition) {
+        return iblockaccess.getType(blockposition.north()).getBlock() == this ? BlockChest.b : (iblockaccess.getType(blockposition.south()).getBlock() == this ? BlockChest.c : (iblockaccess.getType(blockposition.west()).getBlock() == this ? BlockChest.d : (iblockaccess.getType(blockposition.east()).getBlock() == this ? BlockChest.e : BlockChest.f)));
+    }
+
+    public void onPlace(World world, BlockPosition blockposition, IBlockData iblockdata) {
+        this.e(world, blockposition, iblockdata);
+        Iterator iterator = EnumDirection.EnumDirectionLimit.HORIZONTAL.iterator();
+
+        while (iterator.hasNext()) {
+            EnumDirection enumdirection = (EnumDirection) iterator.next();
+            BlockPosition blockposition1 = blockposition.shift(enumdirection);
+            // NeonPaper start - Dont load chunks for chests
+            final IBlockData iblockdata1 = world.isLoaded(blockposition1) ? world.getType(blockposition1) : null;
+            if (iblockdata1 ==  null) {
+                continue;
+            }
+            // NeonPaper end
+
+            if (iblockdata1.getBlock() == this) {
+                this.e(world, blockposition1, iblockdata1);
+            }
+        }
+
+    }
+
+    public IBlockData getPlacedState(World world, BlockPosition blockposition, EnumDirection enumdirection, float f, float f1, float f2, int i, EntityLiving entityliving) {
+        return this.getBlockData().set(BlockChest.FACING, entityliving.getDirection());
+    }
+
+    public void postPlace(World world, BlockPosition blockposition, IBlockData iblockdata, EntityLiving entityliving, ItemStack itemstack) {
+        EnumDirection enumdirection = EnumDirection.fromType2(MathHelper.floor((double) (entityliving.yaw * 4.0F / 360.0F) + 0.5D) & 3).opposite();
+
+        iblockdata = iblockdata.set(BlockChest.FACING, enumdirection);
+        BlockPosition blockposition1 = blockposition.north();
+        BlockPosition blockposition2 = blockposition.south();
+        BlockPosition blockposition3 = blockposition.west();
+        BlockPosition blockposition4 = blockposition.east();
+        boolean flag = this == world.getType(blockposition1).getBlock();
+        boolean flag1 = this == world.getType(blockposition2).getBlock();
+        boolean flag2 = this == world.getType(blockposition3).getBlock();
+        boolean flag3 = this == world.getType(blockposition4).getBlock();
+
+        if (!flag && !flag1 && !flag2 && !flag3) {
+            world.setTypeAndData(blockposition, iblockdata, 3);
+        } else if (enumdirection.k() == EnumDirection.EnumAxis.X && (flag || flag1)) {
+            if (flag) {
+                world.setTypeAndData(blockposition1, iblockdata, 3);
+            } else {
+                world.setTypeAndData(blockposition2, iblockdata, 3);
+            }
+
+            world.setTypeAndData(blockposition, iblockdata, 3);
+        } else if (enumdirection.k() == EnumDirection.EnumAxis.Z && (flag2 || flag3)) {
+            if (flag2) {
+                world.setTypeAndData(blockposition3, iblockdata, 3);
+            } else {
+                world.setTypeAndData(blockposition4, iblockdata, 3);
+            }
+
+            world.setTypeAndData(blockposition, iblockdata, 3);
+        }
+
+        if (itemstack.hasName()) {
+            TileEntity tileentity = world.getTileEntity(blockposition);
+
+            if (tileentity instanceof TileEntityChest) {
+                ((TileEntityChest) tileentity).setCustomName(itemstack.getName());
+            }
+        }
+
+    }
+
+    public IBlockData e(World world, BlockPosition blockposition, IBlockData iblockdata) {
+        if (world.isClientSide) {
+            return iblockdata;
+        } else {
+            IBlockData iblockdata1 = world.getType(blockposition.north());
+            IBlockData iblockdata2 = world.getType(blockposition.south());
+            IBlockData iblockdata3 = world.getType(blockposition.west());
+            IBlockData iblockdata4 = world.getType(blockposition.east());
+            EnumDirection enumdirection = (EnumDirection) iblockdata.get(BlockChest.FACING);
+
+            if (iblockdata1.getBlock() != this && iblockdata2.getBlock() != this) {
+                boolean flag = iblockdata1.b();
+                boolean flag1 = iblockdata2.b();
+
+                if (iblockdata3.getBlock() == this || iblockdata4.getBlock() == this) {
+                    BlockPosition blockposition1 = iblockdata3.getBlock() == this ? blockposition.west() : blockposition.east();
+                    IBlockData iblockdata5 = world.getType(blockposition1.north());
+                    IBlockData iblockdata6 = world.getType(blockposition1.south());
+
+                    enumdirection = EnumDirection.SOUTH;
+                    EnumDirection enumdirection1;
+
+                    if (iblockdata3.getBlock() == this) {
+                        enumdirection1 = (EnumDirection) iblockdata3.get(BlockChest.FACING);
+                    } else {
+                        enumdirection1 = (EnumDirection) iblockdata4.get(BlockChest.FACING);
+                    }
+
+                    if (enumdirection1 == EnumDirection.NORTH) {
+                        enumdirection = EnumDirection.NORTH;
+                    }
+
+                    if ((flag || iblockdata5.b()) && !flag1 && !iblockdata6.b()) {
+                        enumdirection = EnumDirection.SOUTH;
+                    }
+
+                    if ((flag1 || iblockdata6.b()) && !flag && !iblockdata5.b()) {
+                        enumdirection = EnumDirection.NORTH;
+                    }
+                }
+            } else {
+                BlockPosition blockposition2 = iblockdata1.getBlock() == this ? blockposition.north() : blockposition.south();
+                IBlockData iblockdata7 = world.getType(blockposition2.west());
+                IBlockData iblockdata8 = world.getType(blockposition2.east());
+
+                enumdirection = EnumDirection.EAST;
+                EnumDirection enumdirection2;
+
+                if (iblockdata1.getBlock() == this) {
+                    enumdirection2 = (EnumDirection) iblockdata1.get(BlockChest.FACING);
+                } else {
+                    enumdirection2 = (EnumDirection) iblockdata2.get(BlockChest.FACING);
+                }
+
+                if (enumdirection2 == EnumDirection.WEST) {
+                    enumdirection = EnumDirection.WEST;
+                }
+
+                if ((iblockdata3.b() || iblockdata7.b()) && !iblockdata4.b() && !iblockdata8.b()) {
+                    enumdirection = EnumDirection.EAST;
+                }
+
+                if ((iblockdata4.b() || iblockdata8.b()) && !iblockdata3.b() && !iblockdata7.b()) {
+                    enumdirection = EnumDirection.WEST;
+                }
+            }
+
+            iblockdata = iblockdata.set(BlockChest.FACING, enumdirection);
+            world.setTypeAndData(blockposition, iblockdata, 3);
+            return iblockdata;
+        }
+    }
+
+    public IBlockData f(World world, BlockPosition blockposition, IBlockData iblockdata) {
+        EnumDirection enumdirection = null;
+        Iterator iterator = EnumDirection.EnumDirectionLimit.HORIZONTAL.iterator();
+
+        while (iterator.hasNext()) {
+            EnumDirection enumdirection1 = (EnumDirection) iterator.next();
+            IBlockData iblockdata1 = world.getType(blockposition.shift(enumdirection1));
+
+            if (iblockdata1.getBlock() == this) {
+                return iblockdata;
+            }
+
+            if (iblockdata1.b()) {
+                if (enumdirection != null) {
+                    enumdirection = null;
+                    break;
+                }
+
+                enumdirection = enumdirection1;
+            }
+        }
+
+        if (enumdirection != null) {
+            return iblockdata.set(BlockChest.FACING, enumdirection.opposite());
+        } else {
+            EnumDirection enumdirection2 = (EnumDirection) iblockdata.get(BlockChest.FACING);
+
+            if (world.getType(blockposition.shift(enumdirection2)).b()) {
+                enumdirection2 = enumdirection2.opposite();
+            }
+
+            if (world.getType(blockposition.shift(enumdirection2)).b()) {
+                enumdirection2 = enumdirection2.e();
+            }
+
+            if (world.getType(blockposition.shift(enumdirection2)).b()) {
+                enumdirection2 = enumdirection2.opposite();
+            }
+
+            return iblockdata.set(BlockChest.FACING, enumdirection2);
+        }
+    }
+
+    public boolean canPlace(World world, BlockPosition blockposition) {
+        int i = 0;
+        BlockPosition blockposition1 = blockposition.west();
+        BlockPosition blockposition2 = blockposition.east();
+        BlockPosition blockposition3 = blockposition.north();
+        BlockPosition blockposition4 = blockposition.south();
+
+        if (world.getType(blockposition1).getBlock() == this) {
+            if (this.d(world, blockposition1)) {
+                return false;
+            }
+
+            ++i;
+        }
+
+        if (world.getType(blockposition2).getBlock() == this) {
+            if (this.d(world, blockposition2)) {
+                return false;
+            }
+
+            ++i;
+        }
+
+        if (world.getType(blockposition3).getBlock() == this) {
+            if (this.d(world, blockposition3)) {
+                return false;
+            }
+
+            ++i;
+        }
+
+        if (world.getType(blockposition4).getBlock() == this) {
+            if (this.d(world, blockposition4)) {
+                return false;
+            }
+
+            ++i;
+        }
+
+        return i <= 1;
+    }
+
+    private boolean d(World world, BlockPosition blockposition) {
+        if (world.getType(blockposition).getBlock() != this) {
+            return false;
+        } else {
+            Iterator iterator = EnumDirection.EnumDirectionLimit.HORIZONTAL.iterator();
+
+            EnumDirection enumdirection;
+
+            do {
+                if (!iterator.hasNext()) {
+                    return false;
+                }
+
+                enumdirection = (EnumDirection) iterator.next();
+            } while (world.getType(blockposition.shift(enumdirection)).getBlock() != this);
+
+            return true;
+        }
+    }
+
+    public void a(IBlockData iblockdata, World world, BlockPosition blockposition, Block block, BlockPosition blockposition1) {
+        super.a(iblockdata, world, blockposition, block, blockposition1);
+        TileEntity tileentity = world.getTileEntity(blockposition);
+
+        if (tileentity instanceof TileEntityChest) {
+            tileentity.invalidateBlockCache();
+        }
+
+    }
+
+    public void remove(World world, BlockPosition blockposition, IBlockData iblockdata) {
+        TileEntity tileentity = world.getTileEntity(blockposition);
+
+        if (tileentity instanceof IInventory) {
+            InventoryUtils.dropInventory(world, blockposition, (IInventory) tileentity);
+            world.updateAdjacentComparators(blockposition, this);
+        }
+
+        super.remove(world, blockposition, iblockdata);
+    }
+
+    public boolean interact(World world, BlockPosition blockposition, IBlockData iblockdata, EntityHuman entityhuman, EnumHand enumhand, EnumDirection enumdirection, float f, float f1, float f2) {
+        if (world.isClientSide) {
+            return true;
+        } else {
+            ITileInventory itileinventory = this.getInventory(world, blockposition);
+
+            if (itileinventory != null) {
+                entityhuman.openContainer(itileinventory);
+                if (this.g == BlockChest.Type.BASIC) {
+                    entityhuman.b(StatisticList.aa);
+                } else if (this.g == BlockChest.Type.TRAP) {
+                    entityhuman.b(StatisticList.U);
+                }
+            }
+
+            return true;
+        }
+    }
+
+    @Nullable
+    public ITileInventory getInventory(World world, BlockPosition blockposition) {
+        return this.a(world, blockposition, false);
+    }
+
+    @Nullable
+    public ITileInventory a(World world, BlockPosition blockposition, boolean flag) {
+        TileEntity tileentity = world.getTileEntity(blockposition);
+
+        if (!(tileentity instanceof TileEntityChest)) {
+            return null;
+        } else {
+            Object object = (TileEntityChest) tileentity;
+
+            if (!flag && this.e(world, blockposition)) {
+                return null;
+            } else {
+                Iterator iterator = EnumDirection.EnumDirectionLimit.HORIZONTAL.iterator();
+
+                while (iterator.hasNext()) {
+                    EnumDirection enumdirection = (EnumDirection) iterator.next();
+                    BlockPosition blockposition1 = blockposition.shift(enumdirection);
+                    // Paper start - don't load chunks if the other side of the chest is in unloaded chunk
+                    final IBlockData type = world.getTypeIfLoaded(blockposition1); // Paper
+                    if (type ==  null) {
+                        continue;
+                    }
+                    Block block = type.getBlock();
+                    // Paper end
+
+                    if (block == this) {
+                        if (!flag && this.e(world, blockposition1)) { // Paper - check for allowBlocked flag - MC-99321
+                            return null;
+                        }
+
+                        TileEntity tileentity1 = world.getTileEntity(blockposition1);
+
+                        if (tileentity1 instanceof TileEntityChest) {
+                            if (enumdirection != EnumDirection.WEST && enumdirection != EnumDirection.NORTH) {
+                                object = new InventoryLargeChest("container.chestDouble", (ITileInventory) object, (TileEntityChest) tileentity1);
+                            } else {
+                                object = new InventoryLargeChest("container.chestDouble", (TileEntityChest) tileentity1, (ITileInventory) object);
+                            }
+                        }
+                    }
+                }
+
+                return (ITileInventory) object;
+            }
+        }
+    }
+
+    public TileEntity a(World world, int i) {
+        return new TileEntityChest();
+    }
+
+    public boolean isPowerSource(IBlockData iblockdata) {
+        return this.g == BlockChest.Type.TRAP;
+    }
+
+    public int b(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition, EnumDirection enumdirection) {
+        if (!iblockdata.m()) {
+            return 0;
+        } else {
+            int i = 0;
+            TileEntity tileentity = iblockaccess.getTileEntity(blockposition);
+
+            if (tileentity instanceof TileEntityChest) {
+                i = ((TileEntityChest) tileentity).l;
+            }
+
+            return MathHelper.clamp(i, 0, 15);
+        }
+    }
+
+    public int c(IBlockData iblockdata, IBlockAccess iblockaccess, BlockPosition blockposition, EnumDirection enumdirection) {
+        return enumdirection == EnumDirection.UP ? iblockdata.a(iblockaccess, blockposition, enumdirection) : 0;
+    }
+
+    private boolean e(World world, BlockPosition blockposition) {
+        return this.i(world, blockposition) || this.j(world, blockposition);
+    }
+
+    private boolean i(World world, BlockPosition blockposition) {
+        return world.getType(blockposition.up()).l();
+    }
+
+    private boolean j(World world, BlockPosition blockposition) {
+        // Paper start - Option ti dsiable chest cat detection
+        if (world.paperConfig.disableChestCatDetection) {
+            return false;
+        }
+        // Paper end
+        Iterator iterator = world.a(EntityOcelot.class, new AxisAlignedBB((double) blockposition.getX(), (double) (blockposition.getY() + 1), (double) blockposition.getZ(), (double) (blockposition.getX() + 1), (double) (blockposition.getY() + 2), (double) (blockposition.getZ() + 1))).iterator();
+
+        EntityOcelot entityocelot;
+
+        do {
+            if (!iterator.hasNext()) {
+                return false;
+            }
+
+            Entity entity = (Entity) iterator.next();
+
+            entityocelot = (EntityOcelot) entity;
+        } while (!entityocelot.isSitting());
+
+        return true;
+    }
+
+    public boolean isComplexRedstone(IBlockData iblockdata) {
+        return true;
+    }
+
+    public int c(IBlockData iblockdata, World world, BlockPosition blockposition) {
+        return Container.b((IInventory) this.getInventory(world, blockposition));
+    }
+
+    public IBlockData fromLegacyData(int i) {
+        EnumDirection enumdirection = EnumDirection.fromType1(i);
+
+        if (enumdirection.k() == EnumDirection.EnumAxis.Y) {
+            enumdirection = EnumDirection.NORTH;
+        }
+
+        return this.getBlockData().set(BlockChest.FACING, enumdirection);
+    }
+
+    public int toLegacyData(IBlockData iblockdata) {
+        return ((EnumDirection) iblockdata.get(BlockChest.FACING)).a();
+    }
+
+    public IBlockData a(IBlockData iblockdata, EnumBlockRotation enumblockrotation) {
+        return iblockdata.set(BlockChest.FACING, enumblockrotation.a((EnumDirection) iblockdata.get(BlockChest.FACING)));
+    }
+
+    public IBlockData a(IBlockData iblockdata, EnumBlockMirror enumblockmirror) {
+        return iblockdata.a(enumblockmirror.a((EnumDirection) iblockdata.get(BlockChest.FACING)));
+    }
+
+    protected BlockStateList getStateList() {
+        return new BlockStateList(this, new IBlockState[] { BlockChest.FACING});
+    }
+
+    public EnumBlockFaceShape a(IBlockAccess iblockaccess, IBlockData iblockdata, BlockPosition blockposition, EnumDirection enumdirection) {
+        return EnumBlockFaceShape.UNDEFINED;
+    }
+
+    public static enum Type {
+
+        BASIC, TRAP;
+
+        private Type() {}
+    }
+}

sources/src/main/java/net/minecraft/server/BlockStationary.java

@@ -0,0 +1,118 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+import org.bukkit.craftbukkit.event.CraftEventFactory;  // CraftBukkit
+
+public class BlockStationary extends BlockFluids {
+
+    protected BlockStationary(Material material) {
+        super(material);
+        this.a(false);
+        if (material == Material.LAVA) {
+            this.a(true);
+        }
+
+    }
+
+    public void a(IBlockData iblockdata, World world, BlockPosition blockposition, Block block, BlockPosition blockposition1) {
+        if (!this.e(world, blockposition, iblockdata)) {
+            this.f(world, blockposition, iblockdata);
+        }
+
+    }
+
+    private void f(World world, BlockPosition blockposition, IBlockData iblockdata) {
+        BlockFlowing blockflowing = a(this.material);
+
+        world.setTypeAndData(blockposition, blockflowing.getBlockData().set(BlockStationary.LEVEL, iblockdata.get(BlockStationary.LEVEL)), 2);
+        world.a(blockposition, (Block) blockflowing, this.a(world));
+    }
+
+    public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
+        if (this.material == Material.LAVA) {
+            if (world.getGameRules().getBoolean("doFireTick")) {
+                int i = random.nextInt(3);
+
+                if (i > 0) {
+                    BlockPosition blockposition1 = blockposition;
+
+                    for (int j = 0; j < i; ++j) {
+                        blockposition1 = blockposition1.a(random.nextInt(3) - 1, 1, random.nextInt(3) - 1);
+                        if (blockposition1.getY() >= 0 && blockposition1.getY() < 256 && !world.isLoaded(blockposition1)) {
+                            return;
+                        }
+
+                        Block block = world.getType(blockposition1).getBlock();
+
+                        if (block.material == Material.AIR) {
+                            if (this.c(world, blockposition1)) {
+                                 // CraftBukkit start - Prevent lava putting something on fire
+                                if (world.getType(blockposition1) != Blocks.FIRE) {
+                                    if (CraftEventFactory.callBlockIgniteEvent(world, blockposition1.getX(), blockposition1.getY(), blockposition1.getZ(), blockposition.getX(), blockposition.getY(), blockposition.getZ()).isCancelled()) {
+                                        continue;
+                                    }
+                                }
+                                // CraftBukkit end
+                                world.setTypeUpdate(blockposition1, Blocks.FIRE.getBlockData());
+                                return;
+                            }
+                        } else if (block.material.isSolid()) {
+                            return;
+                        }
+                    }
+                } else {
+                    for (int k = 0; k < 3; ++k) {
+                        BlockPosition blockposition2 = blockposition.a(random.nextInt(3) - 1, 0, random.nextInt(3) - 1);
+
+                        if (blockposition2.getY() >= 0 && blockposition2.getY() < 256 && !world.isLoaded(blockposition2)) {
+                            return;
+                        }
+
+                        if (world.isEmpty(blockposition2.up()) && this.d(world, blockposition2)) {
+                            // CraftBukkit start - Prevent lava putting something on fire
+                            BlockPosition up = blockposition2.up();
+                            if (world.getType(up) != Blocks.FIRE) {
+                                if (CraftEventFactory.callBlockIgniteEvent(world, up.getX(), up.getY(), up.getZ(), blockposition.getX(), blockposition.getY(), blockposition.getZ()).isCancelled()) {
+                                    continue;
+                                }
+                            }
+                            // CraftBukkit end
+                            world.setTypeUpdate(blockposition2.up(), Blocks.FIRE.getBlockData());
+                        }
+                    }
+                }
+
+            }
+        }
+    }
+
+    protected boolean c(World world, BlockPosition blockposition) {
+        EnumDirection[] aenumdirection = EnumDirection.values();
+        int i = aenumdirection.length;
+
+        for (int j = 0; j < i; ++j) {
+            EnumDirection enumdirection = aenumdirection[j];
+
+            if (this.d(world, blockposition.shift(enumdirection))) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private boolean d(World world, BlockPosition blockposition) {
+        // Dionysus start - improve fire spread checks
+        if (blockposition.getY() >= 0 && blockposition.getY() < 256) {
+            IBlockData blockData = world.getTypeIfLoaded(blockposition);
+
+            if (blockData != null) {
+                return blockData.getMaterial().isBurnable();
+            }
+        }
+
+        return false;
+        // Dionysus end
+    }
+}

sources/src/main/java/net/minecraft/server/Chunk.java

@@ -1000,7 +1000,6 @@ public class Chunk {
 
         for (int k = i; k <= j; ++k) {
             if (!this.entitySlices[k].isEmpty()) {
-                Iterator iterator = this.entitySlices[k].iterator();
 
                 // Paper start - Don't search for inventories if we have none, and that is all we want
                 /*
@@ -1011,6 +1010,7 @@ public class Chunk {
                 */
                 if (predicate == IEntitySelector.c && inventoryEntityCounts[k] <= 0) continue;
                 // Paper end
+                Iterator iterator = this.entitySlices[k].iterator();
                 while (iterator.hasNext()) {
                     Entity entity1 = (Entity) iterator.next();
 
@@ -1548,4 +1548,14 @@ public class Chunk {
 
         private EnumTileEntityState() {}
     }
+    // FlamePaper start - Hopper item lookup optimization
+    public int getItemCount(BlockPosition blockPosition) {
+        int k = MathHelper.floor(blockPosition.getY() / 16.0D);
+
+        k = Math.max(0, k);
+        k = Math.min(this.entitySlices.length - 1, k);
+
+        return itemCounts[k];
+    }
+    // FlamePaper end - Hopper item lookup optimization
 }

sources/src/main/java/net/minecraft/server/ContainerHorse.java

@@ -0,0 +1,115 @@
+package net.minecraft.server;
+
+// CraftBukkit start
+import org.bukkit.craftbukkit.inventory.CraftInventoryView;
+import org.bukkit.inventory.InventoryView;
+// CraftBukkit end
+
+public class ContainerHorse extends Container {
+
+    private final IInventory a;
+    private final EntityHorseAbstract f;
+
+    // CraftBukkit start
+    org.bukkit.craftbukkit.inventory.CraftInventoryView bukkitEntity;
+    PlayerInventory player;
+
+    @Override
+    public InventoryView getBukkitView() {
+        if (bukkitEntity != null) {
+            return bukkitEntity;
+        }
+
+        return bukkitEntity = new CraftInventoryView(player.player.getBukkitEntity(), a.getOwner().getInventory(), this);
+    }
+
+    public ContainerHorse(IInventory iinventory, final IInventory iinventory1, final EntityHorseAbstract entityhorseabstract, EntityHuman entityhuman) {
+        player = (PlayerInventory) iinventory;
+        // CraftBukkit end
+        this.a = iinventory1;
+        this.f = entityhorseabstract;
+        boolean flag = true;
+
+        iinventory1.startOpen(entityhuman);
+        boolean flag1 = true;
+
+        this.a(new Slot(iinventory1, 0, 8, 18) {
+            public boolean isAllowed(ItemStack itemstack) {
+                return itemstack.getItem() == Items.SADDLE && !this.hasItem() && entityhorseabstract.dF();
+            }
+        });
+        this.a(new Slot(iinventory1, 1, 8, 36) {
+            public boolean isAllowed(ItemStack itemstack) {
+                return entityhorseabstract.f(itemstack);
+            }
+
+            public int getMaxStackSize() {
+                return 1;
+            }
+        });
+        int i;
+        int j;
+
+        if (entityhorseabstract instanceof EntityHorseChestedAbstract && ((EntityHorseChestedAbstract) entityhorseabstract).isCarryingChest()) {
+            for (i = 0; i < 3; ++i) {
+                for (j = 0; j < ((EntityHorseChestedAbstract) entityhorseabstract).dt(); ++j) {
+                    this.a(new Slot(iinventory1, 2 + j + i * ((EntityHorseChestedAbstract) entityhorseabstract).dt(), 80 + j * 18, 18 + i * 18));
+                }
+            }
+        }
+
+        for (i = 0; i < 3; ++i) {
+            for (j = 0; j < 9; ++j) {
+                this.a(new Slot(iinventory, j + i * 9 + 9, 8 + j * 18, 102 + i * 18 + -18));
+            }
+        }
+
+        for (i = 0; i < 9; ++i) {
+            this.a(new Slot(iinventory, i, 8 + i * 18, 142));
+        }
+
+    }
+
+    public boolean canUse(EntityHuman entityhuman) {
+		return this.a.a(entityhuman) && this.f.isAlive() && this.f.valid && this.f.g((Entity) entityhuman) < 8.0F; // NeonPaper! - Fix MC-161754
+    }
+
+    public ItemStack shiftClick(EntityHuman entityhuman, int i) {
+        ItemStack itemstack = ItemStack.a;
+        Slot slot = (Slot) this.slots.get(i);
+
+        if (slot != null && slot.hasItem()) {
+            ItemStack itemstack1 = slot.getItem();
+
+            itemstack = itemstack1.cloneItemStack();
+            if (i < this.a.getSize()) {
+                if (!this.a(itemstack1, this.a.getSize(), this.slots.size(), true)) {
+                    return ItemStack.a;
+                }
+            } else if (this.getSlot(1).isAllowed(itemstack1) && !this.getSlot(1).hasItem()) {
+                if (!this.a(itemstack1, 1, 2, false)) {
+                    return ItemStack.a;
+                }
+            } else if (this.getSlot(0).isAllowed(itemstack1)) {
+                if (!this.a(itemstack1, 0, 1, false)) {
+                    return ItemStack.a;
+                }
+            } else if (this.a.getSize() <= 2 || !this.a(itemstack1, 2, this.a.getSize(), false)) {
+                return ItemStack.a;
+            }
+
+            if (itemstack1.isEmpty()) {
+                slot.set(ItemStack.a);
+            } else {
+                slot.f();
+            }
+        }
+
+        return itemstack;
+    }
+
+    public void b(EntityHuman entityhuman) {
+        super.b(entityhuman);
+        this.a.closeContainer(entityhuman);
+    }
+}

sources/src/main/java/net/minecraft/server/EnchantmentManager.java

@@ -118,6 +118,7 @@ public class EnchantmentManager {
         EnchantmentManager.a.a = 0;
         EnchantmentManager.a.b = damagesource;
         a(EnchantmentManager.a, iterable);
+		EnchantmentManager.a.b = null; // Reaper - Fix MC-128547
         return EnchantmentManager.a.a;
     }
 
@@ -145,6 +146,11 @@ public class EnchantmentManager {
             a(EnchantmentManager.c, entityliving.getItemInMainHand());
         }
 		
+        // Reaper start - Fix MC-128547
+        EnchantmentManager.c.b = null;
+        EnchantmentManager.c.a = null;
+        // Reaper end
+
     }
 
     public static void b(EntityLiving entityliving, Entity entity) {
@@ -157,7 +163,10 @@ public class EnchantmentManager {
         if (entityliving instanceof EntityHuman) {
             a(EnchantmentManager.d, entityliving.getItemInMainHand());
         }
-
+        // Reaper start - Fix MC-128547
+        EnchantmentManager.d.b = null;
+        EnchantmentManager.d.a = null;
+        // Reaper end
     }
 
     public static int a(Enchantment enchantment, EntityLiving entityliving) {

sources/src/main/java/net/minecraft/server/Entity.java

@@ -45,6 +45,10 @@ import org.bukkit.event.entity.EntityPortalEvent;
 import org.bukkit.plugin.PluginManager;
 // CraftBukkit end
 
+// Dionysus start
+import it.unimi.dsi.fastutil.objects.ObjectArrayList;
+// Dionysus end
+
 /**
  * Akarin Changes Note
  * 1) Random -> LightRandom (performance)
@@ -91,7 +95,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
     private static int entityCount = 1; // Paper - MC-111480 - ID 0 is treated as special for DataWatchers, start 1
     private int id;
     public boolean i; public boolean blocksEntitySpawning() { return i; } // Paper - OBFHELPER
-    public final List<Entity> passengers;
+    public final ObjectArrayList<Entity> passengers; // Dionysus
     protected int j;
     private Entity au;public void setVehicle(Entity entity) { this.au = entity; } // Paper // OBFHELPER
     public boolean attachedToPlayer;
@@ -205,7 +209,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
 
     public Entity(World world) {
         this.id = Entity.entityCount++;
-        this.passengers = Lists.newArrayList();
+        this.passengers = new ObjectArrayList<>(); // Dionysus
         this.boundingBox = Entity.c;
         this.width = 0.6F;
         this.length = 1.8F;
@@ -1383,8 +1387,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
     public void d(EntityHuman entityhuman) {}
 
     public void collide(Entity entity) {
-        if (!this.x(entity)) {
-            if (!entity.noclip && !this.noclip) {
+		if (entity.noclip || this.noclip || this.x(entity)) return; // NeonPaper - Test this earlier
         double d0 = entity.locX - this.locX;
         double d1 = entity.locZ - this.locZ;
         double d2 = MathHelper.a(d0, d1);
@@ -1413,9 +1416,6 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
                 entity.f(d0, 0.0D, d1);
             }
         }
-
-            }
-        }
     }
 
     public void f(double d0, double d1, double d2) {
@@ -2881,7 +2881,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
     }
 
     public List<Entity> bF() {
-        return (List) (this.passengers.isEmpty() ? Collections.emptyList() : Lists.newArrayList(this.passengers));
+        return (List) (this.passengers.isEmpty() ? Collections.emptyList() : new ObjectArrayList<>(this.passengers)); // Dionysus
     }
 
     public boolean w(Entity entity) {

sources/src/main/java/net/minecraft/server/EntityEnderman.java

@@ -0,0 +1,476 @@
+package net.minecraft.server;
+
+import com.destroystokyo.paper.event.entity.EndermanEscapeEvent;
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+import com.google.common.base.Predicate;
+import com.google.common.collect.Sets;
+import org.bukkit.event.entity.EntityTargetEvent;
+
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
+import javax.annotation.Nullable;
+
+public class EntityEnderman extends EntityMonster {
+
+    private static final UUID a = UUID.fromString("020E0DFB-87AE-4653-9556-831010E291A0");
+    private static final AttributeModifier b = (new AttributeModifier(EntityEnderman.a, "Attacking speed boost", 0.15000000596046448D, 0)).a(false);
+    private static final Set<Block> c = Sets.newIdentityHashSet();
+    private static final DataWatcherObject<Optional<IBlockData>> bx = DataWatcher.a(EntityEnderman.class, DataWatcherRegistry.g);
+    private static final DataWatcherObject<Boolean> by = DataWatcher.a(EntityEnderman.class, DataWatcherRegistry.h);
+    private int bz;
+    private int bA;
+
+    public EntityEnderman(World world) {
+        super(world);
+        this.setSize(0.6F, 2.9F);
+        this.P = 1.0F;
+        this.a(PathType.WATER, -1.0F);
+    }
+
+    protected void r() {
+        this.goalSelector.a(0, new PathfinderGoalFloat(this));
+        this.goalSelector.a(2, new PathfinderGoalMeleeAttack(this, 1.0D, false));
+        this.goalSelector.a(7, new PathfinderGoalRandomStrollLand(this, 1.0D, 0.0F));
+        this.goalSelector.a(8, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 8.0F));
+        this.goalSelector.a(8, new PathfinderGoalRandomLookaround(this));
+        this.goalSelector.a(10, new EntityEnderman.PathfinderGoalEndermanPlaceBlock(this));
+        this.goalSelector.a(11, new EntityEnderman.PathfinderGoalEndermanPickupBlock(this));
+        this.targetSelector.a(1, new EntityEnderman.PathfinderGoalPlayerWhoLookedAtTarget(this));
+        this.targetSelector.a(2, new PathfinderGoalHurtByTarget(this, false, new Class[0]));
+        this.targetSelector.a(3, new PathfinderGoalNearestAttackableTarget(this, EntityEndermite.class, 10, true, false, new Predicate() {
+            public boolean a(@Nullable EntityEndermite entityendermite) {
+                return entityendermite.p();
+            }
+
+            public boolean apply(@Nullable Object object) {
+                return this.a((EntityEndermite) object);
+            }
+        }));
+    }
+
+    protected void initAttributes() {
+        super.initAttributes();
+        this.getAttributeInstance(GenericAttributes.maxHealth).setValue(40.0D);
+        this.getAttributeInstance(GenericAttributes.MOVEMENT_SPEED).setValue(0.30000001192092896D);
+        this.getAttributeInstance(GenericAttributes.ATTACK_DAMAGE).setValue(7.0D);
+        this.getAttributeInstance(GenericAttributes.FOLLOW_RANGE).setValue(64.0D);
+    }
+
+    public void setGoalTarget(@Nullable EntityLiving entityliving) {
+        // CraftBukkit start - fire event
+        setGoalTarget(entityliving, EntityTargetEvent.TargetReason.UNKNOWN, true);
+    }
+
+    // Paper start
+    private boolean tryEscape(EndermanEscapeEvent.Reason reason) {
+        return new EndermanEscapeEvent((org.bukkit.craftbukkit.entity.CraftEnderman) this.getBukkitEntity(), reason).callEvent();
+    }
+    // Paper end
+
+    @Override
+    public boolean setGoalTarget(EntityLiving entityliving, org.bukkit.event.entity.EntityTargetEvent.TargetReason reason, boolean fireEvent) {
+        if (!super.setGoalTarget(entityliving, reason, fireEvent)) {
+            return false;
+        }
+        entityliving = getGoalTarget();
+        // CraftBukkit end
+        AttributeInstance attributeinstance = this.getAttributeInstance(GenericAttributes.MOVEMENT_SPEED);
+
+        if (entityliving == null) {
+            this.bA = 0;
+            this.datawatcher.set(EntityEnderman.by, Boolean.valueOf(false));
+            attributeinstance.c(EntityEnderman.b);
+        } else {
+            this.bA = this.ticksLived;
+            this.datawatcher.set(EntityEnderman.by, Boolean.valueOf(true));
+            if (!attributeinstance.a(EntityEnderman.b)) {
+                attributeinstance.b(EntityEnderman.b);
+            }
+        }
+        return true;
+
+    }
+
+    protected void i() {
+        super.i();
+        this.datawatcher.register(EntityEnderman.bx, Optional.absent());
+        this.datawatcher.register(EntityEnderman.by, Boolean.valueOf(false));
+    }
+
+    public void p() {
+        if (this.ticksLived >= this.bz + 400) {
+            this.bz = this.ticksLived;
+            if (!this.isSilent()) {
+                this.world.a(this.locX, this.locY + (double) this.getHeadHeight(), this.locZ, SoundEffects.bh, this.bK(), 2.5F, 1.0F, false);
+            }
+        }
+
+    }
+
+    public void a(DataWatcherObject<?> datawatcherobject) {
+        if (EntityEnderman.by.equals(datawatcherobject) && this.do_() && this.world.isClientSide) {
+            this.p();
+        }
+
+        super.a(datawatcherobject);
+    }
+
+    public static void a(DataConverterManager dataconvertermanager) {
+        EntityInsentient.a(dataconvertermanager, EntityEnderman.class);
+    }
+
+    public void b(NBTTagCompound nbttagcompound) {
+        super.b(nbttagcompound);
+        IBlockData iblockdata = this.getCarried();
+
+        if (iblockdata != null) {
+            nbttagcompound.setShort("carried", (short) Block.getId(iblockdata.getBlock()));
+            nbttagcompound.setShort("carriedData", (short) iblockdata.getBlock().toLegacyData(iblockdata));
+        }
+
+    }
+
+    public void a(NBTTagCompound nbttagcompound) {
+        super.a(nbttagcompound);
+        IBlockData iblockdata;
+
+        if (nbttagcompound.hasKeyOfType("carried", 8)) {
+            iblockdata = Block.getByName(nbttagcompound.getString("carried")).fromLegacyData(nbttagcompound.getShort("carriedData") & '\uffff');
+        } else {
+            iblockdata = Block.getById(nbttagcompound.getShort("carried")).fromLegacyData(nbttagcompound.getShort("carriedData") & '\uffff');
+        }
+
+        if (iblockdata == null || iblockdata.getBlock() == null || iblockdata.getMaterial() == Material.AIR) {
+            iblockdata = null;
+        }
+
+        this.setCarried(iblockdata);
+    }
+
+    // Paper start - OBFHELPER - ok not really, but verify this on updates
+    private boolean f(EntityHuman entityhuman) {
+        boolean shouldAttack = f_real(entityhuman);
+        com.destroystokyo.paper.event.entity.EndermanAttackPlayerEvent event = new com.destroystokyo.paper.event.entity.EndermanAttackPlayerEvent((org.bukkit.entity.Enderman) getBukkitEntity(), (org.bukkit.entity.Player) entityhuman.getBukkitEntity());
+        event.setCancelled(!shouldAttack);
+        return event.callEvent();
+    }
+    private boolean f_real(EntityHuman entityhuman) {
+        // Paper end
+        ItemStack itemstack = (ItemStack) entityhuman.inventory.armor.get(3);
+
+        if (itemstack.getItem() == Item.getItemOf(Blocks.PUMPKIN)) {
+            return false;
+        } else {
+            Vec3D vec3d = entityhuman.e(1.0F).a();
+            Vec3D vec3d1 = new Vec3D(this.locX - entityhuman.locX, this.getBoundingBox().b + (double) this.getHeadHeight() - (entityhuman.locY + (double) entityhuman.getHeadHeight()), this.locZ - entityhuman.locZ);
+            double d0 = vec3d1.b();
+
+            vec3d1 = vec3d1.a();
+            double d1 = vec3d.b(vec3d1);
+
+            return d1 > 1.0D - 0.025D / d0 ? entityhuman.hasLineOfSight(this) : false;
+        }
+    }
+
+    public float getHeadHeight() {
+        return 2.55F;
+    }
+
+    public void n() {
+        if (this.world.isClientSide) {
+            for (int i = 0; i < 2; ++i) {
+                this.world.addParticle(EnumParticle.PORTAL, this.locX + (this.random.nextDouble() - 0.5D) * (double) this.width, this.locY + this.random.nextDouble() * (double) this.length - 0.25D, this.locZ + (this.random.nextDouble() - 0.5D) * (double) this.width, (this.random.nextDouble() - 0.5D) * 2.0D, -this.random.nextDouble(), (this.random.nextDouble() - 0.5D) * 2.0D, new int[0]);
+            }
+        }
+
+        this.bd = false;
+        super.n();
+    }
+
+    protected void M() {
+        if (this.an()) {
+            this.damageEntity(DamageSource.DROWN, 1.0F);
+        }
+
+        if (this.world.D() && this.ticksLived >= this.bA + 600) {
+            float f = this.aw();
+
+            if (f > 0.5F && this.world.h(new BlockPosition(this)) && this.random.nextFloat() * 30.0F < (f - 0.4F) * 2.0F && tryEscape(EndermanEscapeEvent.Reason.RUNAWAY)) { // Paper
+                this.setGoalTarget((EntityLiving) null);
+                this.dm();
+            }
+        }
+
+        super.M();
+    }
+
+    public boolean teleportRandomly() { return dm(); } // Paper - OBFHELPER
+    protected boolean dm() {
+        double d0 = this.locX + (this.random.nextDouble() - 0.5D) * 64.0D;
+        double d1 = this.locY + (double) (this.random.nextInt(64) - 32);
+        double d2 = this.locZ + (this.random.nextDouble() - 0.5D) * 64.0D;
+
+        return this.k(d0, d1, d2);
+    }
+
+    protected boolean a(Entity entity) {
+        Vec3D vec3d = new Vec3D(this.locX - entity.locX, this.getBoundingBox().b + (double) (this.length / 2.0F) - entity.locY + (double) entity.getHeadHeight(), this.locZ - entity.locZ);
+
+        vec3d = vec3d.a();
+        double d0 = 16.0D;
+        double d1 = this.locX + (this.random.nextDouble() - 0.5D) * 8.0D - vec3d.x * 16.0D;
+        double d2 = this.locY + (double) (this.random.nextInt(16) - 8) - vec3d.y * 16.0D;
+        double d3 = this.locZ + (this.random.nextDouble() - 0.5D) * 8.0D - vec3d.z * 16.0D;
+
+        return this.k(d1, d2, d3);
+    }
+
+    private boolean k(double d0, double d1, double d2) {
+        boolean flag = this.j(d0, d1, d2);
+
+        if (flag) {
+            this.world.a((EntityHuman) null, this.lastX, this.lastY, this.lastZ, SoundEffects.bi, this.bK(), 1.0F, 1.0F);
+            this.a(SoundEffects.bi, 1.0F, 1.0F);
+        }
+
+        return flag;
+    }
+
+    protected SoundEffect F() {
+        return this.do_() ? SoundEffects.bg : SoundEffects.bd;
+    }
+
+    protected SoundEffect d(DamageSource damagesource) {
+        return SoundEffects.bf;
+    }
+
+    protected SoundEffect cf() {
+        return SoundEffects.be;
+    }
+
+    protected void dropEquipment(boolean flag, int i) {
+        super.dropEquipment(flag, i);
+        IBlockData iblockdata = this.getCarried();
+
+        if (iblockdata != null) {
+            Item item = Item.getItemOf(iblockdata.getBlock());
+            int j = item.k() ? iblockdata.getBlock().toLegacyData(iblockdata) : 0;
+
+            this.a(new ItemStack(item, 1, j), 0.0F);
+        }
+
+    }
+
+    @Nullable
+    protected MinecraftKey J() {
+        return LootTables.w;
+    }
+
+    public void setCarried(@Nullable IBlockData iblockdata) {
+        this.datawatcher.set(EntityEnderman.bx, Optional.fromNullable(iblockdata));
+    }
+
+    @Nullable
+    public IBlockData getCarried() {
+        return (IBlockData) ((Optional) this.datawatcher.get(EntityEnderman.bx)).orNull();
+    }
+
+    public boolean damageEntity(DamageSource damagesource, float f) {
+        if (this.isInvulnerable(damagesource)) {
+            return false;
+        } else if (damagesource instanceof EntityDamageSourceIndirect && tryEscape(EndermanEscapeEvent.Reason.INDIRECT)) { // Paper
+            for (int i = 0; i < 64; ++i) {
+                if (this.dm()) {
+                    return true;
+                }
+            }
+
+            return false;
+        } else {
+            boolean flag = super.damageEntity(damagesource, f);
+
+            if (damagesource.ignoresArmor() && this.random.nextInt(10) != 0 && tryEscape(damagesource == DamageSource.DROWN ? EndermanEscapeEvent.Reason.DROWN : EndermanEscapeEvent.Reason.CRITICAL_HIT)) { // Paper
+                this.dm();
+            }
+
+            return flag;
+        }
+    }
+
+    public boolean do_() {
+        return ((Boolean) this.datawatcher.get(EntityEnderman.by)).booleanValue();
+    }
+
+    static {
+        EntityEnderman.c.add(Blocks.GRASS);
+        EntityEnderman.c.add(Blocks.DIRT);
+        EntityEnderman.c.add(Blocks.SAND);
+        EntityEnderman.c.add(Blocks.GRAVEL);
+        EntityEnderman.c.add(Blocks.YELLOW_FLOWER);
+        EntityEnderman.c.add(Blocks.RED_FLOWER);
+        EntityEnderman.c.add(Blocks.BROWN_MUSHROOM);
+        EntityEnderman.c.add(Blocks.RED_MUSHROOM);
+        EntityEnderman.c.add(Blocks.TNT);
+        EntityEnderman.c.add(Blocks.CACTUS);
+        EntityEnderman.c.add(Blocks.CLAY);
+        EntityEnderman.c.add(Blocks.PUMPKIN);
+        EntityEnderman.c.add(Blocks.MELON_BLOCK);
+        EntityEnderman.c.add(Blocks.MYCELIUM);
+        EntityEnderman.c.add(Blocks.NETHERRACK);
+    }
+
+    static class PathfinderGoalEndermanPickupBlock extends PathfinderGoal {
+
+        private final EntityEnderman enderman;
+
+        public PathfinderGoalEndermanPickupBlock(EntityEnderman entityenderman) {
+            this.enderman = entityenderman;
+        }
+
+        public boolean a() {
+            return this.enderman.getCarried() != null ? false : (!this.enderman.world.getGameRules().getBoolean("mobGriefing") ? false : this.enderman.getRandom().nextInt(20) == 0);
+        }
+
+        public void e() {
+            Random random = this.enderman.getRandom();
+            World world = this.enderman.world;
+            int i = MathHelper.floor(this.enderman.locX - 2.0D + random.nextDouble() * 4.0D);
+            int j = MathHelper.floor(this.enderman.locY + random.nextDouble() * 3.0D);
+            int k = MathHelper.floor(this.enderman.locZ - 2.0D + random.nextDouble() * 4.0D);
+            BlockPosition blockposition = new BlockPosition(i, j, k);
+            IBlockData iblockdata = world.getTypeIfLoaded(blockposition); // NeonPaper
+            if (iblockdata == null) return; // NeonPaper
+            Block block = iblockdata.getBlock();
+            MovingObjectPosition movingobjectposition = world.rayTrace(new Vec3D((double) ((float) MathHelper.floor(this.enderman.locX) + 0.5F), (double) ((float) j + 0.5F), (double) ((float) MathHelper.floor(this.enderman.locZ) + 0.5F)), new Vec3D((double) ((float) i + 0.5F), (double) ((float) j + 0.5F), (double) ((float) k + 0.5F)), false, true, false);
+            boolean flag = movingobjectposition != null && movingobjectposition.a().equals(blockposition);
+
+            if (EntityEnderman.c.contains(block) && flag) {
+                // CraftBukkit start - Pickup event
+                if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.enderman, this.enderman.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()), org.bukkit.Material.AIR).isCancelled()) {
+                    this.enderman.setCarried(iblockdata);
+                    world.setAir(blockposition);
+                }
+                // CraftBukkit end
+            }
+
+        }
+    }
+
+    static class PathfinderGoalEndermanPlaceBlock extends PathfinderGoal {
+
+        private final EntityEnderman a;
+
+        public PathfinderGoalEndermanPlaceBlock(EntityEnderman entityenderman) {
+            this.a = entityenderman;
+        }
+
+        public boolean a() {
+            return this.a.getCarried() == null ? false : (!this.a.world.getGameRules().getBoolean("mobGriefing") ? false : this.a.getRandom().nextInt(2000) == 0);
+        }
+
+        public void e() {
+            Random random = this.a.getRandom();
+            World world = this.a.world;
+            int i = MathHelper.floor(this.a.locX - 1.0D + random.nextDouble() * 2.0D);
+            int j = MathHelper.floor(this.a.locY + random.nextDouble() * 2.0D);
+            int k = MathHelper.floor(this.a.locZ - 1.0D + random.nextDouble() * 2.0D);
+            BlockPosition blockposition = new BlockPosition(i, j, k);
+            IBlockData iblockdata = world.getTypeIfLoaded(blockposition); // NeonPaper
+            if (iblockdata == null) return; // NeonPaper
+            IBlockData iblockdata1 = world.getType(blockposition.down());
+            IBlockData iblockdata2 = this.a.getCarried();
+
+            if (iblockdata2 != null && this.a(world, blockposition, iblockdata2.getBlock(), iblockdata, iblockdata1)) {
+                // CraftBukkit start - Place event
+                if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.a, blockposition, this.a.getCarried().getBlock(), this.a.getCarried().getBlock().toLegacyData(this.a.getCarried())).isCancelled()) {
+                world.setTypeAndData(blockposition, iblockdata2, 3);
+                this.a.setCarried((IBlockData) null);
+                }
+                // CraftBukkit end
+            }
+
+        }
+
+        private boolean a(World world, BlockPosition blockposition, Block block, IBlockData iblockdata, IBlockData iblockdata1) {
+            return !block.canPlace(world, blockposition) ? false : (iblockdata.getMaterial() != Material.AIR ? false : (iblockdata1.getMaterial() == Material.AIR ? false : iblockdata1.g()));
+        }
+    }
+
+    static class PathfinderGoalPlayerWhoLookedAtTarget extends PathfinderGoalNearestAttackableTarget<EntityHuman> {
+
+        private final EntityEnderman i; public EntityEnderman getEnderman() { return i; } // Paper - OBFHELPER
+        private EntityHuman j;
+        private int k;
+        private int l;
+
+        public PathfinderGoalPlayerWhoLookedAtTarget(EntityEnderman entityenderman) {
+            super(entityenderman, EntityHuman.class, false);
+            this.i = entityenderman;
+        }
+
+        public boolean a() {
+            double d0 = this.i();
+
+            this.j = this.i.world.a(this.i.locX, this.i.locY, this.i.locZ, d0, d0, (Function) null, new Predicate() {
+                public boolean a(@Nullable EntityHuman entityhuman) {
+                    return entityhuman != null && PathfinderGoalPlayerWhoLookedAtTarget.this.i.f(entityhuman);
+                }
+
+                public boolean apply(@Nullable Object object) {
+                    return this.a((EntityHuman) object);
+                }
+            });
+            return this.j != null;
+        }
+
+        public void c() {
+            this.k = 5;
+            this.l = 0;
+        }
+
+        public void d() {
+            this.j = null;
+            super.d();
+        }
+
+        public boolean b() {
+            if (this.j != null) {
+                if (!this.i.f(this.j)) {
+                    return false;
+                } else {
+                    this.i.a((Entity) this.j, 10.0F, 10.0F);
+                    return true;
+                }
+            } else {
+                return this.d != null && ((EntityHuman) this.d).isAlive() ? true : super.b();
+            }
+        }
+
+        public void e() {
+            if (this.j != null) {
+                if (--this.k <= 0) {
+                    this.d = this.j;
+                    this.j = null;
+                    super.c();
+                }
+            } else {
+                if (this.d != null) {
+                    if (this.i.f((EntityHuman) this.d)) {
+                        if (((EntityHuman) this.d).h(this.i) < 16.0D && this.getEnderman().tryEscape(EndermanEscapeEvent.Reason.STARE)) { // Paper
+                            this.i.dm();
+                        }
+
+                        this.l = 0;
+                    } else if (((EntityHuman) this.d).h(this.i) > 256.0D && this.l++ >= 30 && this.i.a((Entity) this.d)) {
+                        this.l = 0;
+                    }
+                }
+
+                super.e();
+            }
+
+        }
+    }
+}

sources/src/main/java/net/minecraft/server/EntityFishingHook.java

@@ -0,0 +1,538 @@
+package net.minecraft.server;
+
+import java.util.Iterator;
+import java.util.List;
+// CraftBukkit start
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Fish;
+import org.bukkit.event.player.PlayerFishEvent;
+// CraftBukkit end
+
+public class EntityFishingHook extends Entity {
+
+    private static final DataWatcherObject<Integer> b = DataWatcher.a(EntityFishingHook.class, DataWatcherRegistry.b);
+    private boolean isInGround;
+    private int d;
+    public EntityHuman owner;
+    private int f;
+    private int g;
+    private int h;
+    private int at;
+    private float au;
+    public Entity hooked;
+    private EntityFishingHook.HookState av;
+    private int aw;
+    private int ax;
+
+    public EntityFishingHook(World world, EntityHuman entityhuman) {
+        super(world);
+        this.av = EntityFishingHook.HookState.FLYING;
+        this.a(entityhuman);
+        this.n();
+    }
+
+    private void a(EntityHuman entityhuman) {
+        this.setSize(0.25F, 0.25F);
+        this.ah = true;
+        this.owner = entityhuman;
+        this.owner.hookedFish = this;
+    }
+
+    public void a(int i) {
+        this.ax = i;
+    }
+
+    public void c(int i) {
+        this.aw = i;
+    }
+
+    private void n() {
+        float f = this.owner.lastPitch + (this.owner.pitch - this.owner.lastPitch);
+        float f1 = this.owner.lastYaw + (this.owner.yaw - this.owner.lastYaw);
+        float f2 = MathHelper.cos(-f1 * 0.017453292F - 3.1415927F);
+        float f3 = MathHelper.sin(-f1 * 0.017453292F - 3.1415927F);
+        float f4 = -MathHelper.cos(-f * 0.017453292F);
+        float f5 = MathHelper.sin(-f * 0.017453292F);
+        double d0 = this.owner.lastX + (this.owner.locX - this.owner.lastX) - (double) f3 * 0.3D;
+        double d1 = this.owner.lastY + (this.owner.locY - this.owner.lastY) + (double) this.owner.getHeadHeight();
+        double d2 = this.owner.lastZ + (this.owner.locZ - this.owner.lastZ) - (double) f2 * 0.3D;
+
+        this.setPositionRotation(d0, d1, d2, f1, f);
+        this.motX = (double) (-f3);
+        this.motY = (double) MathHelper.a(-(f5 / f4), -5.0F, 5.0F);
+        this.motZ = (double) (-f2);
+        float f6 = MathHelper.sqrt(this.motX * this.motX + this.motY * this.motY + this.motZ * this.motZ);
+
+        this.motX *= 0.6D / (double) f6 + 0.5D + this.random.nextGaussian() * 0.0045D;
+        this.motY *= 0.6D / (double) f6 + 0.5D + this.random.nextGaussian() * 0.0045D;
+        this.motZ *= 0.6D / (double) f6 + 0.5D + this.random.nextGaussian() * 0.0045D;
+        float f7 = MathHelper.sqrt(this.motX * this.motX + this.motZ * this.motZ);
+
+        this.yaw = (float) (MathHelper.c(this.motX, this.motZ) * 57.2957763671875D);
+        this.pitch = (float) (MathHelper.c(this.motY, (double) f7) * 57.2957763671875D);
+        this.lastYaw = this.yaw;
+        this.lastPitch = this.pitch;
+    }
+
+    protected void i() {
+        this.getDataWatcher().register(EntityFishingHook.b, Integer.valueOf(0));
+    }
+
+    public void a(DataWatcherObject<?> datawatcherobject) {
+        if (EntityFishingHook.b.equals(datawatcherobject)) {
+            int i = ((Integer) this.getDataWatcher().get(EntityFishingHook.b)).intValue();
+
+            this.hooked = i > 0 ? this.world.getEntity(i - 1) : null;
+        }
+
+        super.a(datawatcherobject);
+    }
+
+    public void B_() {
+        super.B_();
+        if (this.owner == null) {
+            this.die();
+        } else if (this.world.isClientSide || !this.p()) {
+            if (this.isInGround) {
+                ++this.d;
+                if (this.d >= 1200) {
+                    this.die();
+                    return;
+                }
+            }
+
+            float f = 0.0F;
+            BlockPosition blockposition = new BlockPosition(this);
+            IBlockData iblockdata = this.world.getType(blockposition);
+
+            if (iblockdata.getMaterial() == Material.WATER) {
+                f = BlockFluids.g(iblockdata, this.world, blockposition);
+            }
+
+            double d0;
+
+            if (this.av == EntityFishingHook.HookState.FLYING) {
+                if (this.hooked != null) {
+                    this.motX = 0.0D;
+                    this.motY = 0.0D;
+                    this.motZ = 0.0D;
+                    this.av = EntityFishingHook.HookState.HOOKED_IN_ENTITY;
+                    return;
+                }
+
+                if (f > 0.0F) {
+                    this.motX *= 0.3D;
+                    this.motY *= 0.2D;
+                    this.motZ *= 0.3D;
+                    this.av = EntityFishingHook.HookState.BOBBING;
+                    return;
+                }
+
+                if (!this.world.isClientSide) {
+                    this.r();
+                }
+
+                if (!this.isInGround && !this.onGround && !this.positionChanged) {
+                    ++this.f;
+                } else {
+                    this.f = 0;
+                    this.motX = 0.0D;
+                    this.motY = 0.0D;
+                    this.motZ = 0.0D;
+                }
+            } else {
+                if (this.av == EntityFishingHook.HookState.HOOKED_IN_ENTITY) {
+                    if (this.hooked != null) {
+                        if (this.hooked.dead) {
+                            this.hooked = null;
+                            this.av = EntityFishingHook.HookState.FLYING;
+                        } else {
+                            this.locX = this.hooked.locX;
+                            double d1 = (double) this.hooked.length;
+
+                            this.locY = this.hooked.getBoundingBox().b + d1 * 0.8D;
+                            this.locZ = this.hooked.locZ;
+                            this.setPosition(this.locX, this.locY, this.locZ);
+							if (this.ak) this.die(); // NeonPaper - Prevent going through portals
+                        }
+                    }
+
+                    return;
+                }
+
+                if (this.av == EntityFishingHook.HookState.BOBBING) {
+                    this.motX *= 0.9D;
+                    this.motZ *= 0.9D;
+                    d0 = this.locY + this.motY - (double) blockposition.getY() - (double) f;
+                    if (Math.abs(d0) < 0.01D) {
+                        d0 += Math.signum(d0) * 0.1D;
+                    }
+
+                    this.motY -= d0 * (double) this.random.nextFloat() * 0.2D;
+                    if (!this.world.isClientSide && f > 0.0F) {
+                        this.a(blockposition);
+                    }
+                }
+            }
+
+            if (iblockdata.getMaterial() != Material.WATER) {
+                this.motY -= 0.03D;
+            }
+
+            this.move(EnumMoveType.SELF, this.motX, this.motY, this.motZ);
+            this.q();
+            d0 = 0.92D;
+            this.motX *= 0.92D;
+            this.motY *= 0.92D;
+            this.motZ *= 0.92D;
+            this.setPosition(this.locX, this.locY, this.locZ);
+
+            // Paper start - These shouldn't be going through portals
+            if (this.inPortal()) {
+                this.die();
+            }
+            // Paper end
+        }
+    }
+
+    private boolean p() {
+        ItemStack itemstack = this.owner.getItemInMainHand();
+        ItemStack itemstack1 = this.owner.getItemInOffHand();
+        boolean flag = itemstack.getItem() == Items.FISHING_ROD;
+        boolean flag1 = itemstack1.getItem() == Items.FISHING_ROD;
+
+        if (!this.owner.dead && this.owner.isAlive() && (flag || flag1) && this.h(this.owner) <= 1024.0D) {
+            return false;
+        } else {
+            this.die();
+            return true;
+        }
+    }
+
+    private void q() {
+        float f = MathHelper.sqrt(this.motX * this.motX + this.motZ * this.motZ);
+
+        this.yaw = (float) (MathHelper.c(this.motX, this.motZ) * 57.2957763671875D);
+
+        for (this.pitch = (float) (MathHelper.c(this.motY, (double) f) * 57.2957763671875D); this.pitch - this.lastPitch < -180.0F; this.lastPitch -= 360.0F) {
+            ;
+        }
+
+        while (this.pitch - this.lastPitch >= 180.0F) {
+            this.lastPitch += 360.0F;
+        }
+
+        while (this.yaw - this.lastYaw < -180.0F) {
+            this.lastYaw -= 360.0F;
+        }
+
+        while (this.yaw - this.lastYaw >= 180.0F) {
+            this.lastYaw += 360.0F;
+        }
+
+        this.pitch = this.lastPitch + (this.pitch - this.lastPitch) * 0.2F;
+        this.yaw = this.lastYaw + (this.yaw - this.lastYaw) * 0.2F;
+    }
+
+    private void r() {
+        Vec3D vec3d = new Vec3D(this.locX, this.locY, this.locZ);
+        Vec3D vec3d1 = new Vec3D(this.locX + this.motX, this.locY + this.motY, this.locZ + this.motZ);
+        MovingObjectPosition movingobjectposition = this.world.rayTrace(vec3d, vec3d1, false, true, false);
+
+        vec3d = new Vec3D(this.locX, this.locY, this.locZ);
+        vec3d1 = new Vec3D(this.locX + this.motX, this.locY + this.motY, this.locZ + this.motZ);
+
+        // Paper start - Call ProjectileCollideEvent
+        if (movingobjectposition != null && movingobjectposition.entity != null) {
+            com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, movingobjectposition);
+            if (event.isCancelled()) {
+                movingobjectposition = null;
+            }
+        }
+        // Paper end
+
+        if (movingobjectposition != null) {
+            vec3d1 = new Vec3D(movingobjectposition.pos.x, movingobjectposition.pos.y, movingobjectposition.pos.z);
+        }
+
+        Entity entity = null;
+        List list = this.world.getEntities(this, this.getBoundingBox().b(this.motX, this.motY, this.motZ).g(1.0D));
+        double d0 = 0.0D;
+        Iterator iterator = list.iterator();
+
+        while (iterator.hasNext()) {
+            Entity entity1 = (Entity) iterator.next();
+
+            if (this.a(entity1) && (entity1 != this.owner || this.f >= 5)) {
+                AxisAlignedBB axisalignedbb = entity1.getBoundingBox().g(0.30000001192092896D);
+                MovingObjectPosition movingobjectposition1 = axisalignedbb.b(vec3d, vec3d1);
+
+                if (movingobjectposition1 != null) {
+                    double d1 = vec3d.distanceSquared(movingobjectposition1.pos);
+
+                    if (d1 < d0 || d0 == 0.0D) {
+                        entity = entity1;
+                        d0 = d1;
+                    }
+                }
+            }
+        }
+
+        if (entity != null) {
+            movingobjectposition = new MovingObjectPosition(entity);
+        }
+
+        if (movingobjectposition != null && movingobjectposition.type != MovingObjectPosition.EnumMovingObjectType.MISS) {
+            org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileHitEvent(this, movingobjectposition); // Craftbukkit - Call event
+            if (movingobjectposition.type == MovingObjectPosition.EnumMovingObjectType.ENTITY) {
+                this.hooked = movingobjectposition.entity;
+                this.s();
+            } else {
+                this.isInGround = true;
+            }
+        }
+
+    }
+
+    private void s() {
+        this.getDataWatcher().set(EntityFishingHook.b, Integer.valueOf(this.hooked.getId() + 1));
+    }
+
+    private void a(BlockPosition blockposition) {
+        WorldServer worldserver = (WorldServer) this.world;
+        int i = 1;
+        BlockPosition blockposition1 = blockposition.up();
+
+        if (this.random.nextFloat() < 0.25F && this.world.isRainingAt(blockposition1)) {
+            ++i;
+        }
+
+        if (this.random.nextFloat() < 0.5F && !this.world.h(blockposition1)) {
+            --i;
+        }
+
+        if (this.g > 0) {
+            --this.g;
+            if (this.g <= 0) {
+                this.h = 0;
+                this.at = 0;
+                // CraftBukkit start
+                PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), null, (Fish) this.getBukkitEntity(), PlayerFishEvent.State.FAILED_ATTEMPT);
+                this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+                // CraftBukkit end
+            } else {
+                this.motY -= 0.2D * (double) this.random.nextFloat() * (double) this.random.nextFloat();
+            }
+        } else {
+            float f;
+            float f1;
+            float f2;
+            double d0;
+            double d1;
+            double d2;
+            Block block;
+
+            if (this.at > 0) {
+                this.at -= i;
+                if (this.at > 0) {
+                    this.au = (float) ((double) this.au + this.random.nextGaussian() * 4.0D);
+                    f = this.au * 0.017453292F;
+                    f1 = MathHelper.sin(f);
+                    f2 = MathHelper.cos(f);
+                    d0 = this.locX + (double) (f1 * (float) this.at * 0.1F);
+                    d1 = (double) ((float) MathHelper.floor(this.getBoundingBox().b) + 1.0F);
+                    d2 = this.locZ + (double) (f2 * (float) this.at * 0.1F);
+                    block = worldserver.getType(new BlockPosition(d0, d1 - 1.0D, d2)).getBlock();
+                    if (block == Blocks.WATER || block == Blocks.FLOWING_WATER) {
+                        if (this.random.nextFloat() < 0.15F) {
+                            worldserver.a(EnumParticle.WATER_BUBBLE, d0, d1 - 0.10000000149011612D, d2, 1, (double) f1, 0.1D, (double) f2, 0.0D, new int[0]);
+                        }
+
+                        float f3 = f1 * 0.04F;
+                        float f4 = f2 * 0.04F;
+
+                        worldserver.a(EnumParticle.WATER_WAKE, d0, d1, d2, 0, (double) f4, 0.01D, (double) (-f3), 1.0D, new int[0]);
+                        worldserver.a(EnumParticle.WATER_WAKE, d0, d1, d2, 0, (double) (-f4), 0.01D, (double) f3, 1.0D, new int[0]);
+                    }
+                } else {
+                    // CraftBukkit start
+                    PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), null, (Fish) this.getBukkitEntity(), PlayerFishEvent.State.BITE);
+                    this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+                    if (playerFishEvent.isCancelled()) {
+                        return;
+                    }
+                    // CraftBukkit end
+                    this.motY = (double) (-0.4F * MathHelper.a(this.random, 0.6F, 1.0F));
+                    this.a(SoundEffects.K, 0.25F, 1.0F + (this.random.nextFloat() - this.random.nextFloat()) * 0.4F);
+                    double d3 = this.getBoundingBox().b + 0.5D;
+
+                    worldserver.a(EnumParticle.WATER_BUBBLE, this.locX, d3, this.locZ, (int) (1.0F + this.width * 20.0F), (double) this.width, 0.0D, (double) this.width, 0.20000000298023224D, new int[0]);
+                    worldserver.a(EnumParticle.WATER_WAKE, this.locX, d3, this.locZ, (int) (1.0F + this.width * 20.0F), (double) this.width, 0.0D, (double) this.width, 0.20000000298023224D, new int[0]);
+                    this.g = MathHelper.nextInt(this.random, 20, 40);
+                }
+            } else if (this.h > 0) {
+                this.h -= i;
+                f = 0.15F;
+                if (this.h < 20) {
+                    f = (float) ((double) f + (double) (20 - this.h) * 0.05D);
+                } else if (this.h < 40) {
+                    f = (float) ((double) f + (double) (40 - this.h) * 0.02D);
+                } else if (this.h < 60) {
+                    f = (float) ((double) f + (double) (60 - this.h) * 0.01D);
+                }
+
+                if (this.random.nextFloat() < f) {
+                    f1 = MathHelper.a(this.random, 0.0F, 360.0F) * 0.017453292F;
+                    f2 = MathHelper.a(this.random, 25.0F, 60.0F);
+                    d0 = this.locX + (double) (MathHelper.sin(f1) * f2 * 0.1F);
+                    d1 = (double) ((float) MathHelper.floor(this.getBoundingBox().b) + 1.0F);
+                    d2 = this.locZ + (double) (MathHelper.cos(f1) * f2 * 0.1F);
+                    block = worldserver.getType(new BlockPosition((int) d0, (int) d1 - 1, (int) d2)).getBlock();
+                    if (block == Blocks.WATER || block == Blocks.FLOWING_WATER) {
+                        worldserver.a(EnumParticle.WATER_SPLASH, d0, d1, d2, 2 + this.random.nextInt(2), 0.10000000149011612D, 0.0D, 0.10000000149011612D, 0.0D, new int[0]);
+                    }
+                }
+
+                if (this.h <= 0) {
+                    this.au = MathHelper.a(this.random, 0.0F, 360.0F);
+                    this.at = MathHelper.nextInt(this.random, 20, 80);
+                }
+            } else {
+                this.h = MathHelper.nextInt(this.random, world.paperConfig.fishingMinTicks, world.paperConfig.fishingMaxTicks); // Paper
+                this.h -= this.ax * 20 * 5;
+            }
+        }
+
+    }
+
+    protected boolean a(Entity entity) {
+        return entity.isInteractable() || entity instanceof EntityItem;
+    }
+
+    public void b(NBTTagCompound nbttagcompound) {}
+
+    public void a(NBTTagCompound nbttagcompound) {}
+
+    public int j() {
+        if (!this.world.isClientSide && this.owner != null) {
+            int i = 0;
+
+            if (this.hooked != null) {
+                // CraftBukkit start
+                PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), this.hooked.getBukkitEntity(), (Fish) this.getBukkitEntity(), PlayerFishEvent.State.CAUGHT_ENTITY);
+                this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+
+                if (playerFishEvent.isCancelled()) {
+                    return 0;
+                }
+                // CraftBukkit end
+                this.k();
+                this.world.broadcastEntityEffect(this, (byte) 31);
+                i = this.hooked instanceof EntityItem ? 3 : 5;
+            } else if (this.g > 0) {
+                LootTableInfo.a loottableinfo_a = new LootTableInfo.a((WorldServer) this.world);
+
+                loottableinfo_a.a((float) this.aw + this.owner.du());
+                Iterator iterator = this.world.getLootTableRegistry().a(LootTables.aA).a(this.random, loottableinfo_a.a()).iterator();
+
+                while (iterator.hasNext()) {
+                    ItemStack itemstack = (ItemStack) iterator.next();
+                    EntityItem entityitem = new EntityItem(this.world, this.locX, this.locY, this.locZ, itemstack);
+                    // CraftBukkit start
+                    PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), entityitem.getBukkitEntity(), (Fish) this.getBukkitEntity(), PlayerFishEvent.State.CAUGHT_FISH);
+                    playerFishEvent.setExpToDrop(this.random.nextInt(6) + 1);
+                    this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+
+                    if (playerFishEvent.isCancelled()) {
+                        return 0;
+                    }
+                    // CraftBukkit end
+                    double d0 = this.owner.locX - this.locX;
+                    double d1 = this.owner.locY - this.locY;
+                    double d2 = this.owner.locZ - this.locZ;
+                    double d3 = (double) MathHelper.sqrt(d0 * d0 + d1 * d1 + d2 * d2);
+                    double d4 = 0.1D;
+
+                    entityitem.motX = d0 * 0.1D;
+                    entityitem.motY = d1 * 0.1D + (double) MathHelper.sqrt(d3) * 0.08D;
+                    entityitem.motZ = d2 * 0.1D;
+                    this.world.addEntity(entityitem);
+                    // CraftBukkit start - this.random.nextInt(6) + 1 -> playerFishEvent.getExpToDrop()
+                    if (playerFishEvent.getExpToDrop() > 0) {
+                        this.owner.world.addEntity(new EntityExperienceOrb(this.owner.world, this.owner.locX, this.owner.locY + 0.5D, this.owner.locZ + 0.5D, playerFishEvent.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.FISHING, this.owner, this)); // Paper
+                    }
+                    // CraftBukkit end
+                    Item item = itemstack.getItem();
+
+                    if (item == Items.FISH || item == Items.COOKED_FISH) {
+                        this.owner.a(StatisticList.E, 1);
+                    }
+                }
+
+                i = 1;
+            }
+
+            if (this.isInGround) {
+                // CraftBukkit start
+                PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), null, (Fish) this.getBukkitEntity(), PlayerFishEvent.State.IN_GROUND);
+                this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+
+                if (playerFishEvent.isCancelled()) {
+                    return 0;
+                }
+                // CraftBukkit end
+                i = 2;
+            }
+            // CraftBukkit start
+            if (i == 0) {
+                PlayerFishEvent playerFishEvent = new PlayerFishEvent((Player) this.owner.getBukkitEntity(), null, (Fish) this.getBukkitEntity(), PlayerFishEvent.State.FAILED_ATTEMPT);
+                this.world.getServer().getPluginManager().callEvent(playerFishEvent);
+                if (playerFishEvent.isCancelled()) {
+                    return 0;
+                }
+            }
+            // CraftBukkit end
+
+            this.die();
+            return i;
+        } else {
+            return 0;
+        }
+    }
+
+    protected void k() {
+        if (this.owner != null) {
+            double d0 = this.owner.locX - this.locX;
+            double d1 = this.owner.locY - this.locY;
+            double d2 = this.owner.locZ - this.locZ;
+            double d3 = 0.1D;
+
+            this.hooked.motX += d0 * 0.1D;
+            this.hooked.motY += d1 * 0.1D;
+            this.hooked.motZ += d2 * 0.1D;
+        }
+    }
+
+    protected boolean playStepSound() {
+        return false;
+    }
+
+    public void die() {
+        super.die();
+        if (this.owner != null) {
+            this.owner.hookedFish = null;
+        }
+
+    }
+
+    public EntityHuman l() {
+        return this.owner;
+    }
+
+    static enum HookState {
+
+        FLYING, HOOKED_IN_ENTITY, BOBBING;
+
+        private HookState() {}
+    }
+}

sources/src/main/java/net/minecraft/server/EntityMushroomCow.java

@@ -0,0 +1,84 @@
+package net.minecraft.server;
+
+import javax.annotation.Nullable;
+import org.bukkit.event.player.PlayerShearEntityEvent; // CraftBukkit
+
+public class EntityMushroomCow extends EntityCow {
+
+    public EntityMushroomCow(World world) {
+        super(world);
+        this.setSize(0.9F, 1.4F);
+        this.bA = Blocks.MYCELIUM;
+    }
+
+    public static void c(DataConverterManager dataconvertermanager) {
+        EntityInsentient.a(dataconvertermanager, EntityMushroomCow.class);
+    }
+
+    public boolean a(EntityHuman entityhuman, EnumHand enumhand) {
+        ItemStack itemstack = entityhuman.b(enumhand);
+
+        if (itemstack.getItem() == Items.BOWL && this.getAge() >= 0 && !entityhuman.abilities.canInstantlyBuild) {
+            itemstack.subtract(1);
+            if (itemstack.isEmpty()) {
+                entityhuman.a(enumhand, new ItemStack(Items.MUSHROOM_STEW));
+            } else if (!entityhuman.inventory.pickup(new ItemStack(Items.MUSHROOM_STEW))) {
+                entityhuman.drop(new ItemStack(Items.MUSHROOM_STEW), false);
+            }
+
+            return true;
+        } else if (itemstack.getItem() == Items.SHEARS && this.getAge() >= 0) {
+			if (this.dead) return false; // Reaper - Fix cow dupe
+            // CraftBukkit start
+            PlayerShearEntityEvent event = new PlayerShearEntityEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), this.getBukkitEntity());
+            this.world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return false;
+            }
+            // CraftBukkit end
+            this.die();
+            this.world.addParticle(EnumParticle.EXPLOSION_LARGE, this.locX, this.locY + (double) (this.length / 2.0F), this.locZ, 0.0D, 0.0D, 0.0D, new int[0]);
+            if (!this.world.isClientSide) {
+                EntityCow entitycow = new EntityCow(this.world);
+
+                entitycow.setPositionRotation(this.locX, this.locY, this.locZ, this.yaw, this.pitch);
+                entitycow.setHealth(this.getHealth());
+                entitycow.aN = this.aN;
+                if (this.hasCustomName()) {
+                    entitycow.setCustomName(this.getCustomName());
+                }
+
+                this.world.addEntity(entitycow);
+
+                for (int i = 0; i < 5; ++i) {
+                    this.world.addEntity(new EntityItem(this.world, this.locX, this.locY + (double) this.length, this.locZ, new ItemStack(Blocks.RED_MUSHROOM)));
+                }
+
+                itemstack.damage(1, entityhuman);
+                this.a(SoundEffects.ei, 1.0F, 1.0F);
+            }
+
+            return true;
+        } else {
+            return super.a(entityhuman, enumhand);
+        }
+    }
+
+    public EntityMushroomCow c(EntityAgeable entityageable) {
+        return new EntityMushroomCow(this.world);
+    }
+
+    @Nullable
+    protected MinecraftKey J() {
+        return LootTables.M;
+    }
+
+    public EntityCow b(EntityAgeable entityageable) {
+        return this.c(entityageable);
+    }
+
+    public EntityAgeable createChild(EntityAgeable entityageable) {
+        return this.c(entityageable);
+    }
+}

sources/src/main/java/net/minecraft/server/EntityPlayer.java

@@ -784,7 +784,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     protected void a(double d0, boolean flag, IBlockData iblockdata, BlockPosition blockposition) {}
 
     protected void b(BlockPosition blockposition) {
-        if (!this.isSpectator()) {
+        if (valid && (!this.isSpectator() || this.world.isLoaded(new BlockPosition(this)))) { // Dionysus - don't tick dead players that are not in the world currently (pending respawn)
             super.b(blockposition);
         }
 
@@ -1156,6 +1156,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
         this.getDataWatcher().set(EntityPlayer.br, entityplayer.getDataWatcher().get(EntityPlayer.br));
         this.lastSentExp = -1;
         this.lastHealthSent = -1.0F;
+		setSneaking(false); // NeonPaper - fix MC-10657
         this.ch = -1;
         // this.cr.a((RecipeBook) entityplayer.cr); // CraftBukkit
         // Paper start - Optimize remove queue

sources/src/main/java/net/minecraft/server/EntityTrackerEntry.java

@@ -0,0 +1,654 @@
+package net.minecraft.server;
+
+import com.google.common.collect.Sets;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+// CraftBukkit start
+import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerVelocityEvent;
+// CraftBukkit end
+
+public class EntityTrackerEntry {
+
+    private static final Logger c = LogManager.getLogger();
+    private final Entity tracker;
+    private final int e;
+    private int f;
+    private final int g;
+    private long xLoc;
+    private long yLoc;
+    private long zLoc;
+    private int yRot;
+    private int xRot;
+    private int headYaw;
+    private double n;
+    private double o;
+    private double p;
+    public int a;
+    private double q;
+    private double r;
+    private double s;
+    private boolean isMoving;
+    private final boolean u;
+    private int v;
+    private List<Entity> w = Collections.emptyList();
+    private boolean x;
+    private boolean y;
+    public boolean b;
+    // Paper start
+    // Replace trackedPlayers Set with a Map. The value is true until the player receives
+    // their first update (which is forced to have absolute coordinates), false afterward.
+    public java.util.Map<EntityPlayer, Boolean> trackedPlayerMap = new java.util.HashMap<EntityPlayer, Boolean>();
+    public Set<EntityPlayer> trackedPlayers = trackedPlayerMap.keySet();
+    // Paper end
+
+    public EntityTrackerEntry(Entity entity, int i, int j, int k, boolean flag) {
+        entity.tracker = this; // Paper
+        this.tracker = entity;
+        this.e = i;
+        this.f = j;
+        this.g = k;
+        this.u = flag;
+        this.xLoc = EntityTracker.a(entity.locX);
+        this.yLoc = EntityTracker.a(entity.locY);
+        this.zLoc = EntityTracker.a(entity.locZ);
+        this.yRot = MathHelper.d(entity.yaw * 256.0F / 360.0F);
+        this.xRot = MathHelper.d(entity.pitch * 256.0F / 360.0F);
+        this.headYaw = MathHelper.d(entity.getHeadRotation() * 256.0F / 360.0F);
+        this.y = entity.onGround;
+    }
+
+    public boolean equals(Object object) {
+        return object instanceof EntityTrackerEntry ? ((EntityTrackerEntry) object).tracker.getId() == this.tracker.getId() : false;
+    }
+
+    public int hashCode() {
+        return this.tracker.getId();
+    }
+
+    public void track(List<EntityHuman> list) {
+        this.b = false;
+        if (!this.isMoving || this.tracker.d(this.q, this.r, this.s) > 16.0D) {
+            this.q = this.tracker.locX;
+            this.r = this.tracker.locY;
+            this.s = this.tracker.locZ;
+            this.isMoving = true;
+            this.b = true;
+            this.scanPlayers(list);
+        }
+
+        List list1 = this.tracker.bF();
+
+        if (!list1.equals(this.w)) {
+            this.w = list1;
+            this.broadcastIncludingSelf(new PacketPlayOutMount(this.tracker)); // CraftBukkit
+        }
+
+        // PAIL : rename
+        if (this.tracker instanceof EntityItemFrame && this.a % 20 == 0) { // Paper
+            EntityItemFrame entityitemframe = (EntityItemFrame) this.tracker;
+            ItemStack itemstack = entityitemframe.getItem();
+
+            if (itemstack != null && itemstack.getItem() instanceof ItemWorldMap) { // Paper - moved back up
+                WorldMap worldmap = Items.FILLED_MAP.getSavedMap(itemstack, this.tracker.world);
+                Iterator iterator = this.trackedPlayers.iterator(); // CraftBukkit
+
+                while (iterator.hasNext()) {
+                    EntityHuman entityhuman = (EntityHuman) iterator.next();
+                    EntityPlayer entityplayer = (EntityPlayer) entityhuman;
+
+                    worldmap.a(entityplayer, itemstack);
+                    Packet packet = Items.FILLED_MAP.a(itemstack, this.tracker.world, (EntityHuman) entityplayer);
+
+                    if (packet != null) {
+                        entityplayer.playerConnection.sendPacket(packet);
+                    }
+                }
+            }
+
+            this.d();
+        }
+
+        if (this.a % this.g == 0 || this.tracker.impulse || this.tracker.getDataWatcher().a()) {
+            int i;
+
+            if (this.tracker.isPassenger()) {
+                i = MathHelper.d(this.tracker.yaw * 256.0F / 360.0F);
+                int j = MathHelper.d(this.tracker.pitch * 256.0F / 360.0F);
+                boolean flag = Math.abs(i - this.yRot) >= 1 || Math.abs(j - this.xRot) >= 1;
+
+                if (flag) {
+                    this.broadcast(new PacketPlayOutEntity.PacketPlayOutEntityLook(this.tracker.getId(), (byte) i, (byte) j, this.tracker.onGround));
+                    this.yRot = i;
+                    this.xRot = j;
+                }
+
+                this.xLoc = EntityTracker.a(this.tracker.locX);
+                this.yLoc = EntityTracker.a(this.tracker.locY);
+                this.zLoc = EntityTracker.a(this.tracker.locZ);
+                this.d();
+                this.x = true;
+            } else {
+                ++this.v;
+                long k = EntityTracker.a(this.tracker.locX);
+                long l = EntityTracker.a(this.tracker.locY);
+                long i1 = EntityTracker.a(this.tracker.locZ);
+                int j1 = MathHelper.d(this.tracker.yaw * 256.0F / 360.0F);
+                int k1 = MathHelper.d(this.tracker.pitch * 256.0F / 360.0F);
+                long l1 = k - this.xLoc;
+                long i2 = l - this.yLoc;
+                long j2 = i1 - this.zLoc;
+                Object object = null;
+                boolean flag1 = l1 * l1 + i2 * i2 + j2 * j2 >= 128L || this.a % 60 == 0;
+                boolean flag2 = Math.abs(j1 - this.yRot) >= 1 || Math.abs(k1 - this.xRot) >= 1;
+
+                if (this.a > 0 || this.tracker instanceof EntityArrow) { // Paper - Moved up
+                // CraftBukkit start - Code moved from below
+                if (flag1) {
+                    this.xLoc = k;
+                    this.yLoc = l;
+                    this.zLoc = i1;
+                }
+
+                if (flag2) {
+                    this.yRot = j1;
+                    this.xRot = k1;
+                }
+                // CraftBukkit end
+
+                    if (l1 >= -32768L && l1 < 32768L && i2 >= -32768L && i2 < 32768L && j2 >= -32768L && j2 < 32768L && this.v <= 400 && !this.x && this.y == this.tracker.onGround) {
+                        if ((!flag1 || !flag2) && !(this.tracker instanceof EntityArrow)) {
+                            if (flag1) {
+                                object = new PacketPlayOutEntity.PacketPlayOutRelEntityMove(this.tracker.getId(), l1, i2, j2, this.tracker.onGround);
+                            } else if (flag2) {
+                                object = new PacketPlayOutEntity.PacketPlayOutEntityLook(this.tracker.getId(), (byte) j1, (byte) k1, this.tracker.onGround);
+                            }
+                        } else {
+                            object = new PacketPlayOutEntity.PacketPlayOutRelEntityMoveLook(this.tracker.getId(), l1, i2, j2, (byte) j1, (byte) k1, this.tracker.onGround);
+                        }
+                    } else {
+                        this.y = this.tracker.onGround;
+                        this.v = 0;
+                        // CraftBukkit start - Refresh list of who can see a player before sending teleport packet
+                        if (this.tracker instanceof EntityPlayer) {
+                            this.scanPlayers(new java.util.ArrayList(this.trackedPlayers));
+                        }
+                        // CraftBukkit end
+                        this.c();
+                        object = new PacketPlayOutEntityTeleport(this.tracker);
+                    }
+                }
+
+                boolean flag3 = this.u;
+
+                if (this.tracker instanceof EntityLiving && ((EntityLiving) this.tracker).cP()) {
+                    flag3 = true;
+                }
+
+                if (flag3 && this.a > 0) {
+                    double d0 = this.tracker.motX - this.n;
+                    double d1 = this.tracker.motY - this.o;
+                    double d2 = this.tracker.motZ - this.p;
+                    double d3 = 0.02D;
+                    double d4 = d0 * d0 + d1 * d1 + d2 * d2;
+
+                    if (d4 > 4.0E-4D || d4 > 0.0D && this.tracker.motX == 0.0D && this.tracker.motY == 0.0D && this.tracker.motZ == 0.0D) {
+                        this.n = this.tracker.motX;
+                        this.o = this.tracker.motY;
+                        this.p = this.tracker.motZ;
+                        this.broadcast(new PacketPlayOutEntityVelocity(this.tracker.getId(), this.n, this.o, this.p));
+                    }
+                }
+
+                if (object != null) {
+                    // Paper start - ensure fresh viewers get an absolute position on their first update,
+                    // since we can't be certain what position they received in the spawn packet.
+                    if (object instanceof PacketPlayOutEntityTeleport) {
+                        this.broadcast((Packet) object);
+                    } else {
+                        PacketPlayOutEntityTeleport teleportPacket = null;
+
+                        for (java.util.Map.Entry<EntityPlayer, Boolean> viewer : trackedPlayerMap.entrySet()) {
+                            if (viewer.getValue()) {
+                                viewer.setValue(false);
+                                if (teleportPacket == null) {
+                                    teleportPacket = new PacketPlayOutEntityTeleport(this.tracker);
+                                }
+                                viewer.getKey().playerConnection.sendPacket(teleportPacket);
+                            } else {
+                                viewer.getKey().playerConnection.sendPacket((Packet) object);
+                            }
+                        }
+                    }
+                    // Paper end
+                }
+
+                this.d();
+                /* CraftBukkit start - Code moved up
+                if (flag1) {
+                    this.xLoc = k;
+                    this.yLoc = l;
+                    this.zLoc = i1;
+                }
+
+                if (flag2) {
+                    this.yRot = j1;
+                    this.xRot = k1;
+                }
+                // CraftBukkit end */
+
+                this.x = false;
+            }
+
+            i = MathHelper.d(this.tracker.getHeadRotation() * 256.0F / 360.0F);
+            if (Math.abs(i - this.headYaw) >= 1) {
+                this.broadcast(new PacketPlayOutEntityHeadRotation(this.tracker, (byte) i));
+                this.headYaw = i;
+            }
+
+            this.tracker.impulse = false;
+        }
+
+        ++this.a;
+        if (this.tracker.velocityChanged) {
+            // CraftBukkit start - Create PlayerVelocity event
+            boolean cancelled = false;
+
+            if (this.tracker instanceof EntityPlayer) {
+                Player player = (Player) this.tracker.getBukkitEntity();
+                org.bukkit.util.Vector velocity = player.getVelocity();
+
+                PlayerVelocityEvent event = new PlayerVelocityEvent(player, velocity.clone());
+                this.tracker.world.getServer().getPluginManager().callEvent(event);
+
+                if (event.isCancelled()) {
+                    cancelled = true;
+                } else if (!velocity.equals(event.getVelocity())) {
+                    player.setVelocity(event.getVelocity());
+                }
+            }
+
+            if (!cancelled) {
+                this.broadcastIncludingSelf(new PacketPlayOutEntityVelocity(this.tracker));
+            }
+            // CraftBukkit end
+            this.tracker.velocityChanged = false;
+        }
+
+    }
+
+    private void d() {
+        DataWatcher datawatcher = this.tracker.getDataWatcher();
+
+        if (datawatcher.a()) {
+            this.broadcastIncludingSelf(new PacketPlayOutEntityMetadata(this.tracker.getId(), datawatcher, false));
+        }
+
+        if (this.tracker instanceof EntityLiving) {
+            AttributeMapServer attributemapserver = (AttributeMapServer) ((EntityLiving) this.tracker).getAttributeMap();
+            Set set = attributemapserver.getAttributes();
+
+            if (!set.isEmpty()) {
+                // CraftBukkit start - Send scaled max health
+                if (this.tracker instanceof EntityPlayer) {
+                    ((EntityPlayer) this.tracker).getBukkitEntity().injectScaledMaxHealth(set, false);
+                }
+                // CraftBukkit end
+                this.broadcastIncludingSelf(new PacketPlayOutUpdateAttributes(this.tracker.getId(), set));
+            }
+
+            set.clear();
+        }
+
+    }
+
+    public void broadcast(Packet<?> packet) {
+        Iterator iterator = this.trackedPlayers.iterator();
+
+        while (iterator.hasNext()) {
+            EntityPlayer entityplayer = (EntityPlayer) iterator.next();
+
+            entityplayer.playerConnection.sendPacket(packet);
+        }
+
+    }
+
+    public void broadcastIncludingSelf(Packet<?> packet) {
+        this.broadcast(packet);
+        if (this.tracker instanceof EntityPlayer) {
+            ((EntityPlayer) this.tracker).playerConnection.sendPacket(packet);
+        }
+
+    }
+
+    public void a() {
+        Iterator iterator = this.trackedPlayers.iterator();
+
+        while (iterator.hasNext()) {
+            EntityPlayer entityplayer = (EntityPlayer) iterator.next();
+
+            this.tracker.c(entityplayer);
+            entityplayer.c(this.tracker);
+        }
+
+    }
+
+    public void a(EntityPlayer entityplayer) {
+        if (this.trackedPlayers.contains(entityplayer)) {
+            this.tracker.c(entityplayer);
+            entityplayer.c(this.tracker);
+            this.trackedPlayers.remove(entityplayer);
+        }
+
+    }
+
+    public void updatePlayer(EntityPlayer entityplayer) {
+        org.spigotmc.AsyncCatcher.catchOp( "player tracker update"); // Spigot
+        if (entityplayer != this.tracker) {
+            if (this.c(entityplayer)) {
+                if (!this.trackedPlayers.contains(entityplayer) && (this.e(entityplayer) || this.tracker.attachedToPlayer)) {
+                    // CraftBukkit start - respect vanish API
+                    if (this.tracker instanceof EntityPlayer) {
+                        Player player = ((EntityPlayer) this.tracker).getBukkitEntity();
+                        if (!entityplayer.getBukkitEntity().canSee(player)) {
+                            return;
+                        }
+                    }
+
+                    entityplayer.removeQueue.remove(Integer.valueOf(this.tracker.getId()));
+                    // CraftBukkit end
+                    this.trackedPlayerMap.put(entityplayer, true); // Paper
+                    Packet packet = this.e();
+
+                    entityplayer.playerConnection.sendPacket(packet);
+                    if (!this.tracker.getDataWatcher().d()) {
+                        entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityMetadata(this.tracker.getId(), this.tracker.getDataWatcher(), true));
+                    }
+
+                    boolean flag = this.u;
+
+                    if (this.tracker instanceof EntityLiving) {
+                        AttributeMapServer attributemapserver = (AttributeMapServer) ((EntityLiving) this.tracker).getAttributeMap();
+                        Collection collection = attributemapserver.c();
+
+                        // CraftBukkit start - If sending own attributes send scaled health instead of current maximum health
+                        if (this.tracker.getId() == entityplayer.getId()) {
+                            ((EntityPlayer) this.tracker).getBukkitEntity().injectScaledMaxHealth(collection, false);
+                        }
+                        // CraftBukkit end
+
+                        if (!collection.isEmpty()) {
+                            entityplayer.playerConnection.sendPacket(new PacketPlayOutUpdateAttributes(this.tracker.getId(), collection));
+                        }
+
+                        if (((EntityLiving) this.tracker).cP()) {
+                            flag = true;
+                        }
+                    }
+
+                    this.n = this.tracker.motX;
+                    this.o = this.tracker.motY;
+                    this.p = this.tracker.motZ;
+                    if (flag && !(packet instanceof PacketPlayOutSpawnEntityLiving)) {
+                        entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityVelocity(this.tracker.getId(), this.tracker.motX, this.tracker.motY, this.tracker.motZ));
+                    }
+
+                    if (this.tracker instanceof EntityLiving) {
+                        EnumItemSlot[] aenumitemslot = EnumItemSlot.values();
+                        int i = aenumitemslot.length;
+
+                        for (int j = 0; j < i; ++j) {
+                            EnumItemSlot enumitemslot = aenumitemslot[j];
+                            ItemStack itemstack = ((EntityLiving) this.tracker).getEquipment(enumitemslot);
+
+                            if (!itemstack.isEmpty()) {
+                                entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityEquipment(this.tracker.getId(), enumitemslot, itemstack));
+                            }
+                        }
+                    }
+
+                    if (this.tracker instanceof EntityHuman) {
+                        EntityHuman entityhuman = (EntityHuman) this.tracker;
+
+                        if (entityhuman.isSleeping()) {
+                            entityplayer.playerConnection.sendPacket(new PacketPlayOutBed(entityhuman, new BlockPosition(this.tracker)));
+                        }
+                    }
+
+                    if (this.tracker instanceof EntityLiving) {
+						// CraftBukkit start - Fix for nonsensical head yaw
+                        this.headYaw = MathHelper.d(this.tracker.getHeadRotation() * 256.0F / 360.0F);
+                        this.broadcast(new PacketPlayOutEntityHeadRotation(this.tracker, (byte) headYaw));
+						// CraftBukkit end
+                        EntityLiving entityliving = (EntityLiving) this.tracker;
+                        Iterator iterator = entityliving.getEffects().iterator();
+
+                        while (iterator.hasNext()) {
+                            MobEffect mobeffect = (MobEffect) iterator.next();
+
+                            entityplayer.playerConnection.sendPacket(new PacketPlayOutEntityEffect(this.tracker.getId(), mobeffect));
+                        }
+                    }
+
+                    if (!this.tracker.bF().isEmpty()) {
+                        entityplayer.playerConnection.sendPacket(new PacketPlayOutMount(this.tracker));
+                    }
+
+                    if (this.tracker.isPassenger()) {
+                        entityplayer.playerConnection.sendPacket(new PacketPlayOutMount(this.tracker.bJ()));
+                    }
+
+                    this.tracker.b(entityplayer);
+                    entityplayer.d(this.tracker);
+                    updatePassengers(entityplayer); // Paper
+                }
+            } else if (this.trackedPlayers.contains(entityplayer)) {
+                this.trackedPlayers.remove(entityplayer);
+                this.tracker.c(entityplayer);
+                entityplayer.c(this.tracker);
+                updatePassengers(entityplayer); // Paper
+            }
+
+        }
+    }
+
+    public boolean c(EntityPlayer entityplayer) {
+        // Paper start
+        if (tracker.isPassenger()) {
+            return isTrackedBy(tracker.getVehicle(), entityplayer);
+        } else if (hasPassengerInRange(tracker, entityplayer)) {
+            return true;
+        }
+
+        return isInRangeOfPlayer(entityplayer);
+    }
+    private static boolean hasPassengerInRange(Entity entity, EntityPlayer entityplayer) {
+        if (!entity.isVehicle()) {
+            return false;
+        }
+        for (Entity passenger : entity.passengers) {
+            if (passenger.tracker != null && passenger.tracker.isInRangeOfPlayer(entityplayer)) {
+                return true;
+            }
+            if (passenger.isVehicle()) {
+                if (hasPassengerInRange(passenger, entityplayer)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    private static boolean isTrackedBy(Entity entity, EntityPlayer entityplayer) {
+        return entity == entityplayer || entity.tracker != null && entity.tracker.trackedPlayers.contains(entityplayer);
+    }
+    private void updatePassengers(EntityPlayer player) {
+        if (tracker.isVehicle()) {
+            tracker.passengers.forEach((e) -> {
+                if (e.tracker != null) {
+                    e.tracker.updatePlayer(player);
+                }
+            });
+            player.playerConnection.sendPacket(new PacketPlayOutMount(this.tracker));
+        }
+    }
+    private boolean isInRangeOfPlayer(EntityPlayer entityplayer) {
+        // Paper end
+        double d0 = entityplayer.locX - (double) this.xLoc / 4096.0D;
+        double d1 = entityplayer.locZ - (double) this.zLoc / 4096.0D;
+        int i = Math.min(this.e, this.f);
+
+        return d0 >= (double) (-i) && d0 <= (double) i && d1 >= (double) (-i) && d1 <= (double) i && this.tracker.a(entityplayer);
+    }
+
+    private boolean e(EntityPlayer entityplayer) {
+        return entityplayer.x().getPlayerChunkMap().a(entityplayer, this.tracker.ab, this.tracker.ad);
+    }
+
+    public void scanPlayers(List<EntityHuman> list) {
+        for (int i = 0; i < list.size(); ++i) {
+            this.updatePlayer((EntityPlayer) list.get(i));
+        }
+
+    }
+
+    private Packet<?> e() {
+        if (this.tracker.dead) {
+            // CraftBukkit start - Remove useless error spam, just return
+            // EntityTrackerEntry.d.warn("Fetching addPacket for removed entity");
+            return null;
+            // CraftBukkit end
+        }
+
+        if (this.tracker instanceof EntityPlayer) {
+            return new PacketPlayOutNamedEntitySpawn((EntityHuman) this.tracker);
+        } else if (this.tracker instanceof IAnimal) {
+            this.headYaw = MathHelper.d(this.tracker.getHeadRotation() * 256.0F / 360.0F);
+            return new PacketPlayOutSpawnEntityLiving((EntityLiving) this.tracker);
+        } else if (this.tracker instanceof EntityPainting) {
+            return new PacketPlayOutSpawnEntityPainting((EntityPainting) this.tracker);
+        } else if (this.tracker instanceof EntityItem) {
+            return new PacketPlayOutSpawnEntity(this.tracker, 2, 1);
+        } else if (this.tracker instanceof EntityMinecartAbstract) {
+            EntityMinecartAbstract entityminecartabstract = (EntityMinecartAbstract) this.tracker;
+
+            return new PacketPlayOutSpawnEntity(this.tracker, 10, entityminecartabstract.v().a());
+        } else if (this.tracker instanceof EntityBoat) {
+            return new PacketPlayOutSpawnEntity(this.tracker, 1);
+        } else if (this.tracker instanceof EntityExperienceOrb) {
+            return new PacketPlayOutSpawnEntityExperienceOrb((EntityExperienceOrb) this.tracker);
+        } else if (this.tracker instanceof EntityFishingHook) {
+            EntityHuman entityhuman = ((EntityFishingHook) this.tracker).l();
+
+            return new PacketPlayOutSpawnEntity(this.tracker, 90, entityhuman == null ? this.tracker.getId() : entityhuman.getId());
+        } else {
+            Entity entity;
+
+            if (this.tracker instanceof EntitySpectralArrow) {
+                entity = ((EntitySpectralArrow) this.tracker).shooter;
+                return new PacketPlayOutSpawnEntity(this.tracker, 91, 1 + (entity == null ? this.tracker.getId() : entity.getId()));
+            } else if (this.tracker instanceof EntityTippedArrow) {
+                entity = ((EntityArrow) this.tracker).shooter;
+                return new PacketPlayOutSpawnEntity(this.tracker, 60, 1 + (entity == null ? this.tracker.getId() : entity.getId()));
+            } else if (this.tracker instanceof EntitySnowball) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 61);
+            } else if (this.tracker instanceof EntityLlamaSpit) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 68);
+            } else if (this.tracker instanceof EntityPotion) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 73);
+            } else if (this.tracker instanceof EntityThrownExpBottle) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 75);
+            } else if (this.tracker instanceof EntityEnderPearl) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 65);
+            } else if (this.tracker instanceof EntityEnderSignal) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 72);
+            } else if (this.tracker instanceof EntityFireworks) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 76);
+            } else if (this.tracker instanceof EntityFireball) {
+                EntityFireball entityfireball = (EntityFireball) this.tracker;
+                PacketPlayOutSpawnEntity packetplayoutspawnentity = null;
+                byte b0 = 63;
+
+                if (this.tracker instanceof EntitySmallFireball) {
+                    b0 = 64;
+                } else if (this.tracker instanceof EntityDragonFireball) {
+                    b0 = 93;
+                } else if (this.tracker instanceof EntityWitherSkull) {
+                    b0 = 66;
+                }
+
+                if (entityfireball.shooter != null) {
+                    packetplayoutspawnentity = new PacketPlayOutSpawnEntity(this.tracker, b0, ((EntityFireball) this.tracker).shooter.getId());
+                } else {
+                    packetplayoutspawnentity = new PacketPlayOutSpawnEntity(this.tracker, b0, 0);
+                }
+
+                packetplayoutspawnentity.a((int) (entityfireball.dirX * 8000.0D));
+                packetplayoutspawnentity.b((int) (entityfireball.dirY * 8000.0D));
+                packetplayoutspawnentity.c((int) (entityfireball.dirZ * 8000.0D));
+                return packetplayoutspawnentity;
+            } else if (this.tracker instanceof EntityShulkerBullet) {
+                PacketPlayOutSpawnEntity packetplayoutspawnentity1 = new PacketPlayOutSpawnEntity(this.tracker, 67, 0);
+
+                packetplayoutspawnentity1.a((int) (this.tracker.motX * 8000.0D));
+                packetplayoutspawnentity1.b((int) (this.tracker.motY * 8000.0D));
+                packetplayoutspawnentity1.c((int) (this.tracker.motZ * 8000.0D));
+                return packetplayoutspawnentity1;
+            } else if (this.tracker instanceof EntityEgg) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 62);
+            } else if (this.tracker instanceof EntityEvokerFangs) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 79);
+            } else if (this.tracker instanceof EntityTNTPrimed) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 50);
+            } else if (this.tracker instanceof EntityEnderCrystal) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 51);
+            } else if (this.tracker instanceof EntityFallingBlock) {
+                EntityFallingBlock entityfallingblock = (EntityFallingBlock) this.tracker;
+
+                return new PacketPlayOutSpawnEntity(this.tracker, 70, Block.getCombinedId(entityfallingblock.getBlock()));
+            } else if (this.tracker instanceof EntityArmorStand) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 78);
+            } else if (this.tracker instanceof EntityItemFrame) {
+                EntityItemFrame entityitemframe = (EntityItemFrame) this.tracker;
+
+                return new PacketPlayOutSpawnEntity(this.tracker, 71, entityitemframe.direction.get2DRotationValue(), entityitemframe.getBlockPosition());
+            } else if (this.tracker instanceof EntityLeash) {
+                EntityLeash entityleash = (EntityLeash) this.tracker;
+
+                return new PacketPlayOutSpawnEntity(this.tracker, 77, 0, entityleash.getBlockPosition());
+            } else if (this.tracker instanceof EntityAreaEffectCloud) {
+                return new PacketPlayOutSpawnEntity(this.tracker, 3);
+            } else {
+                throw new IllegalArgumentException("Don\'t know how to add " + this.tracker.getClass() + "!");
+            }
+        }
+    }
+
+    public void clear(EntityPlayer entityplayer) {
+        org.spigotmc.AsyncCatcher.catchOp( "player tracker clear"); // Spigot
+        if (this.trackedPlayers.contains(entityplayer)) {
+            this.trackedPlayers.remove(entityplayer);
+            this.tracker.c(entityplayer);
+            entityplayer.c(this.tracker);
+            updatePassengers(entityplayer); // Paper
+        }
+
+    }
+
+    public Entity b() {
+        return this.tracker;
+    }
+
+    public void a(int i) {
+        this.f = i;
+    }
+
+    public void c() {
+        this.isMoving = false;
+    }
+}

sources/src/main/java/net/minecraft/server/Explosion.java

@@ -0,0 +1,504 @@
+package net.minecraft.server;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
+
+import javax.annotation.Nullable;
+import java.util.*;
+import java.util.function.Predicate;
+
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityExplodeEvent;
+import org.bukkit.Location;
+import org.bukkit.event.block.BlockExplodeEvent;
+// CraftBukkit end
+
+public class Explosion {
+
+    private final boolean a;
+    private final boolean b;
+    private final Random c = new Random();
+    private final World world;
+    private final double posX;
+    private final double posY;
+    private final double posZ;
+    public final Entity source;
+    private final float size;
+    private final ArrayList<BlockPosition> blocks = Lists.newArrayList();
+    private final Map<EntityHuman, Vec3D> k = Maps.newHashMap();
+    public boolean wasCanceled = false; // CraftBukkit - add field
+	
+    // Dionysus start
+    private final BlockPosition.MutableBlockPosition cachedPos = new BlockPosition.MutableBlockPosition();
+    // The chunk coordinate of the most recently stepped through block.
+    private int prevChunkX = Integer.MIN_VALUE;
+    private int prevChunkZ = Integer.MIN_VALUE;
+
+    // The chunk belonging to prevChunkPos.
+    private Chunk prevChunk;
+
+    private static final com.google.common.base.Predicate<Entity> hitPredicate = entity -> IEntitySelector.d.apply(entity) && !entity.dead; // Dionysus - Paper - don't hit dead entities
+    // Dionysus end
+
+    public Explosion(World world, Entity entity, double d0, double d1, double d2, float f, boolean flag, boolean flag1) {
+        this.world = world;
+        this.source = entity;
+        this.size = (float) Math.max(f, 0.0); // CraftBukkit - clamp bad values
+        this.posX = d0;
+        this.posY = d1;
+        this.posZ = d2;
+        this.a = flag;
+        this.b = flag1;
+    }
+
+    public void a() {
+        // CraftBukkit start
+        if (this.size < 0.1F) {
+            return;
+        }
+        // CraftBukkit end
+        // Dionysus start - optimize memory usage from explosions
+        // CaffeineMC optimized raytracing loop
+        // @author JellySquid
+        // @author nopjmp
+        // https://github.com/CaffeineMC/lithium-fabric
+        // Using integer encoding for the block positions provides a massive speedup and prevents us from needing to
+        // allocate a block position for every step we make along each ray, eliminating essentially all the memory
+        // allocations of this function. The overhead of packing block positions into integer format is negligible
+        // compared to a memory allocation and associated overhead of hashing real objects in a set.
+        final LongOpenHashSet touched = new LongOpenHashSet(0);
+        final Random random = this.world.random;
+        for (int rayX = 0; rayX < 16; ++rayX) {
+            boolean xPlane = rayX == 0 || rayX == 15;
+            double vecX = (((float) rayX / 15.0F) * 2.0F) - 1.0F;
+
+            for (int rayY = 0; rayY < 16; ++rayY) {
+                boolean yPlane = rayY == 0 || rayY == 15;
+                double vecY = (((float) rayY / 15.0F) * 2.0F) - 1.0F;
+
+                for (int rayZ = 0; rayZ < 16; ++rayZ) {
+                    boolean zPlane = rayZ == 0 || rayZ == 15;
+
+                    // We only fire rays from the surface of our origin volume
+                    if (xPlane || yPlane || zPlane) {
+                        double vecZ = (((float) rayZ / 15.0F) * 2.0F) - 1.0F;
+
+                        this.performRayCast(random, vecX, vecY, vecZ, touched);
+                    }
+                }
+            }
+        }
+
+        // We can now iterate back over the set of positions we modified and re-build BlockPos objects from them
+        // This will only allocate as many objects as there are in the set, where otherwise we would allocate them
+        // each step of a every ray.
+        blocks.ensureCapacity(touched.size());
+        for (Long longPos : touched) {
+            blocks.add(BlockPosition.fromLong(longPos));
+        }
+        float f3 = this.size * 2.0F;
+
+        int i = MathHelper.floor(this.posX - (double) f3 - 1.0D);
+        int j = MathHelper.floor(this.posX + (double) f3 + 1.0D);
+        int l = MathHelper.floor(this.posY - (double) f3 - 1.0D);
+        int i1 = MathHelper.floor(this.posY + (double) f3 + 1.0D);
+        int j1 = MathHelper.floor(this.posZ - (double) f3 - 1.0D);
+        int k1 = MathHelper.floor(this.posZ + (double) f3 + 1.0D);
+        // Paper start - Fix lag from explosions processing dead entities
+        List<Entity> list = this.world.getEntities(this.source, new AxisAlignedBB(i, l, j1, j, i1, k1), hitPredicate);
+        // Paper end
+        Vec3D vec3d = new Vec3D(this.posX, this.posY, this.posZ);
+
+        for (Entity entity : list) {
+
+            if (!entity.bB()) {
+                double d7 = entity.e(this.posX, this.posY, this.posZ) / (double) f3;
+
+                if (d7 <= 1.0D) {
+                    double d8 = entity.locX - this.posX;
+                    double d9 = entity.locY + (double) entity.getHeadHeight() - this.posY;
+                    double d10 = entity.locZ - this.posZ;
+                    double d11 = MathHelper.sqrt(d8 * d8 + d9 * d9 + d10 * d10);
+
+                    if (d11 != 0.0D) {
+                        d8 /= d11;
+                        d9 /= d11;
+                        d10 /= d11;
+                        double d12 = this.getBlockDensity(vec3d, entity.getBoundingBox()); // Paper - Optimize explosions
+                        double d13 = (1.0D - d7) * d12;
+
+                        // CraftBukkit start
+                        // entity.damageEntity(DamageSource.explosion(this), (float) ((int) ((d13 * d13 + d13) / 2.0D * 7.0D * (double) f3 + 1.0D)));
+                        CraftEventFactory.entityDamage = source;
+                        entity.forceExplosionKnockback = false;
+                        boolean wasDamaged = entity.damageEntity(DamageSource.explosion(this), (float) ((int) ((d13 * d13 + d13) / 2.0D * 7.0D * (double) f3 + 1.0D)));
+                        CraftEventFactory.entityDamage = null;
+                        if (!wasDamaged && !(entity instanceof EntityTNTPrimed || entity instanceof EntityFallingBlock) && !entity.forceExplosionKnockback) {
+                            continue;
+                        }
+                        // CraftBukkit end
+                        double d14 = d13;
+
+                        if (entity instanceof EntityLiving) {
+                            d14 = entity instanceof EntityHuman && world.paperConfig.disableExplosionKnockback ? 0 : EnchantmentProtection.a((EntityLiving) entity, d13); // Paper - Disable explosion knockback
+                        }
+
+                        entity.motX += d8 * d14;
+                        entity.motY += d9 * d14;
+                        entity.motZ += d10 * d14;
+                        if (entity instanceof EntityHuman) {
+                            EntityHuman entityhuman = (EntityHuman) entity;
+
+                            if (!entityhuman.isSpectator() && (!entityhuman.z() && !world.paperConfig.disableExplosionKnockback || !entityhuman.abilities.isFlying)) { // Paper - Disable explosion knockback
+                                this.k.put(entityhuman, new Vec3D(d8 * d13, d9 * d13, d10 * d13));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+    }
+	
+    private void performRayCast(Random random, double vecX, double vecY, double vecZ, LongOpenHashSet touched) {
+        double dist = Math.sqrt((vecX * vecX) + (vecY * vecY) + (vecZ * vecZ));
+
+        double normX = (vecX / dist) * 0.3D;
+        double normY = (vecY / dist) * 0.3D;
+        double normZ = (vecZ / dist) * 0.3D;
+
+        float strength = this.size * (0.7F + (random.nextFloat() * 0.6F));
+
+        double stepX = this.posX;
+        double stepY = this.posY;
+        double stepZ = this.posZ;
+
+        int prevX = Integer.MIN_VALUE;
+        int prevY = Integer.MIN_VALUE;
+        int prevZ = Integer.MIN_VALUE;
+
+        float prevResistance = 0.0F;
+
+        // Step through the ray until it is finally stopped
+        while (strength > 0.0F) {
+            int blockX = MathHelper.floor(stepX);
+            int blockY = MathHelper.floor(stepY);
+            int blockZ = MathHelper.floor(stepZ);
+
+            float resistance;
+
+            // Check whether or not we have actually moved into a new block this step. Due to how rays are stepped through,
+            // over-sampling of the same block positions will occur. Changing this behaviour would introduce differences in
+            // aliasing and sampling, which is unacceptable for our purposes. As a band-aid, we can simply re-use the
+            // previous result and get a decent boost.
+            if (prevX != blockX || prevY != blockY || prevZ != blockZ) {
+                resistance = this.traverseBlock(strength, blockX, blockY, blockZ, touched);
+
+                prevX = blockX;
+                prevY = blockY;
+                prevZ = blockZ;
+
+                prevResistance = resistance;
+            } else {
+                resistance = prevResistance;
+            }
+
+            strength -= resistance;
+            // Apply a constant fall-off
+            strength -= 0.22500001F;
+
+            stepX += normX;
+            stepY += normY;
+            stepZ += normZ;
+        }
+    }
+
+    /**
+     * Called for every step made by a ray being cast by an explosion.
+     *
+     * @param strength The strength of the ray during this step
+     * @param blockX   The x-coordinate of the block the ray is inside of
+     * @param blockY   The y-coordinate of the block the ray is inside of
+     * @param blockZ   The z-coordinate of the block the ray is inside of
+     * @return The resistance of the current block space to the ray
+     */
+    private float traverseBlock(float strength, int blockX, int blockY, int blockZ, LongOpenHashSet touched) {
+        cachedPos.c(blockX, blockY, blockZ);
+        IBlockData iblockdata = this.world.getType(cachedPos);
+
+        // Early-exit if the y-coordinate is out of bounds.
+        if (cachedPos.isInvalidYLocation()) {
+            if (iblockdata.getMaterial() != Material.AIR) {
+                float blastResistance = this.source != null ? this.source.a(this, this.world, cachedPos, iblockdata) : iblockdata.getBlock().a((Entity) null);
+                return (blastResistance + 0.3F) * 0.3F;
+            }
+            return 0.0F;
+        }
+
+
+        int chunkX = blockX >> 4;
+        int chunkZ = blockZ >> 4;
+
+        // Avoid calling into the chunk manager as much as possible through managing chunks locally
+        if (this.prevChunkX != chunkX || this.prevChunkZ != chunkZ) {
+            this.prevChunk = this.world.getChunkAt(chunkX, chunkZ);
+
+            this.prevChunkX = chunkX;
+            this.prevChunkZ = chunkZ;
+        }
+
+        final Chunk chunk = this.prevChunk;
+
+        float totalResistance = 0.0F;
+        Optional<Float> blastResistance = Optional.empty();
+
+        // If the chunk is missing or out of bounds, assume that it is air
+        if (chunk != null) {
+            // We operate directly on chunk sections to avoid interacting with BlockPos and to squeeze out as much
+            // performance as possible here
+            ChunkSection section = chunk.getSections()[blockY >> 4];
+
+            // If the section doesn't exist or it's empty, assume that the block is air
+            if (section != null && !section.a()) {
+                // Retrieve the block state from the chunk section directly to avoid associated overhead
+                IBlockData blockState = section.getType(blockX & 15, blockY & 15, blockZ & 15);
+
+                // If the block state is air, it cannot have fluid or any kind of resistance, so just leave
+                if (blockState.getBlock() != Blocks.AIR) {
+                    // Get the explosion resistance like vanilla
+                    blastResistance = Optional.of(this.source != null ? this.source.a(this, this.world, cachedPos, iblockdata) : iblockdata.getBlock().a((Entity) null));
+                }
+            }
+        }
+        
+        // Calculate how much this block will resist an explosion's ray
+        if (blastResistance.isPresent()) {
+            totalResistance = (blastResistance.get() + 0.3F) * 0.3F;
+        }
+
+        // Check if this ray is still strong enough to break blocks, and if so, add this position to the set
+        // of positions to destroy
+        float reducedStrength = strength - totalResistance;
+        if (reducedStrength > 0.0F && (this.a || iblockdata.getMaterial() != Material.AIR)) {
+            if ((this.source == null || this.source.a(this, this.world, cachedPos, iblockdata, reducedStrength)) && cachedPos.getY() < 256 && cachedPos.getY() >= 0) {
+                touched.add(cachedPos.asLong());
+            }
+        }
+
+        return totalResistance;
+    }
+    // Dionysus end
+
+
+    public void a(boolean flag) {
+        this.world.a((EntityHuman) null, this.posX, this.posY, this.posZ, SoundEffects.bV, SoundCategory.BLOCKS, 4.0F, (1.0F + (this.world.random.nextFloat() - this.world.random.nextFloat()) * 0.2F) * 0.7F);
+        if (this.size >= 2.0F && this.b) {
+            this.world.addParticle(EnumParticle.EXPLOSION_HUGE, this.posX, this.posY, this.posZ, 1.0D, 0.0D, 0.0D);
+        } else {
+            this.world.addParticle(EnumParticle.EXPLOSION_LARGE, this.posX, this.posY, this.posZ, 1.0D, 0.0D, 0.0D);
+        }
+
+        Iterator iterator;
+        BlockPosition blockposition;
+
+        if (this.b) {
+            // CraftBukkit start
+            org.bukkit.World bworld = this.world.getWorld();
+            org.bukkit.entity.Entity explode = this.source == null ? null : this.source.getBukkitEntity();
+            Location location = new Location(bworld, this.posX, this.posY, this.posZ);
+
+            List<org.bukkit.block.Block> blockList = Lists.newArrayList();
+            for (int i1 = this.blocks.size() - 1; i1 >= 0; i1--) {
+                BlockPosition cpos = (BlockPosition) this.blocks.get(i1);
+                org.bukkit.block.Block bblock = bworld.getBlockAt(cpos.getX(), cpos.getY(), cpos.getZ());
+                if (bblock.getType() != org.bukkit.Material.AIR) {
+                    blockList.add(bblock);
+                }
+            }
+
+            boolean cancelled;
+            List<org.bukkit.block.Block> bukkitBlocks;
+            float yield;
+
+            if (explode != null) {
+                EntityExplodeEvent event = new EntityExplodeEvent(explode, location, blockList, 1.0F / this.size);
+                this.world.getServer().getPluginManager().callEvent(event);
+                cancelled = event.isCancelled();
+                bukkitBlocks = event.blockList();
+                yield = event.getYield();
+            } else {
+                BlockExplodeEvent event = new BlockExplodeEvent(location.getBlock(), blockList, 1.0F / this.size);
+                this.world.getServer().getPluginManager().callEvent(event);
+                cancelled = event.isCancelled();
+                bukkitBlocks = event.blockList();
+                yield = event.getYield();
+            }
+
+            this.blocks.clear();
+
+            this.blocks.ensureCapacity(bukkitBlocks.size());
+            for (org.bukkit.block.Block bblock : bukkitBlocks) {
+                BlockPosition coords = new BlockPosition(bblock.getX(), bblock.getY(), bblock.getZ());
+                blocks.add(coords);
+            }
+
+            if (cancelled) {
+                this.wasCanceled = true;
+                return;
+            }
+            // CraftBukkit end
+            iterator = this.blocks.iterator();
+
+            while (iterator.hasNext()) {
+                blockposition = (BlockPosition) iterator.next();
+                IBlockData iblockdata = this.world.getType(blockposition);
+                Block block = iblockdata.getBlock();
+                this.world.chunkPacketBlockController.updateNearbyBlocks(this.world, blockposition); // Paper - Anti-Xray
+
+                if (flag) {
+                    double d0 = (double) ((float) blockposition.getX() + this.world.random.nextFloat());
+                    double d1 = (double) ((float) blockposition.getY() + this.world.random.nextFloat());
+                    double d2 = (double) ((float) blockposition.getZ() + this.world.random.nextFloat());
+                    double d3 = d0 - this.posX;
+                    double d4 = d1 - this.posY;
+                    double d5 = d2 - this.posZ;
+                    double d6 = (double) MathHelper.sqrt(d3 * d3 + d4 * d4 + d5 * d5);
+
+                    d3 /= d6;
+                    d4 /= d6;
+                    d5 /= d6;
+                    double d7 = 0.5D / (d6 / (double) this.size + 0.1D);
+
+                    d7 *= (double) (this.world.random.nextFloat() * this.world.random.nextFloat() + 0.3F);
+                    d3 *= d7;
+                    d4 *= d7;
+                    d5 *= d7;
+                    this.world.addParticle(EnumParticle.EXPLOSION_NORMAL, (d0 + this.posX) / 2.0D, (d1 + this.posY) / 2.0D, (d2 + this.posZ) / 2.0D, d3, d4, d5);
+                    this.world.addParticle(EnumParticle.SMOKE_NORMAL, d0, d1, d2, d3, d4, d5);
+                }
+
+                if (iblockdata.getMaterial() != Material.AIR) {
+                    if (block.a(this)) {
+                        // CraftBukkit - add yield
+                        block.dropNaturally(this.world, blockposition, this.world.getType(blockposition), yield, 0);
+                    }
+
+                    this.world.setTypeAndData(blockposition, Blocks.AIR.getBlockData(), 3);
+                    block.wasExploded(this.world, blockposition, this);
+                }
+            }
+        }
+
+        if (this.a) {
+            iterator = this.blocks.iterator();
+
+            while (iterator.hasNext()) {
+                blockposition = (BlockPosition) iterator.next();
+                if (this.world.getType(blockposition).getMaterial() == Material.AIR && this.world.getType(blockposition.down()).b() && this.c.nextInt(3) == 0) {
+                    // CraftBukkit start - Ignition by explosion
+                    if (!CraftEventFactory.callBlockIgniteEvent(this.world, blockposition.getX(), blockposition.getY(), blockposition.getZ(), this).isCancelled()) {
+                        this.world.setTypeUpdate(blockposition, Blocks.FIRE.getBlockData());
+                    }
+                    // CraftBukkit end
+                }
+            }
+        }
+
+    }
+
+    public Map<EntityHuman, Vec3D> b() {
+        return this.k;
+    }
+
+    @Nullable
+    public EntityLiving getSource() {
+        // CraftBukkit start - obtain Fireball shooter for explosion tracking
+        return this.source == null ? null : (this.source instanceof EntityTNTPrimed ? ((EntityTNTPrimed) this.source).getSource() : (this.source instanceof EntityLiving ? (EntityLiving) this.source : (this.source instanceof EntityFireball ? ((EntityFireball) this.source).shooter : null)));
+        // CraftBukkit end
+    }
+
+    public void clearBlocks() {
+        this.blocks.clear();
+    }
+
+    public List<BlockPosition> getBlocks() {
+        return this.blocks;
+    }
+
+    // Paper start - Optimize explosions
+    private float getBlockDensity(Vec3D vec3d, AxisAlignedBB aabb) {
+        if (!this.world.paperConfig.optimizeExplosions) {
+            return this.world.a(vec3d, aabb);
+        }
+        CacheKey key = new CacheKey(this, aabb);
+        return this.world.explosionDensityCache.computeIfAbsent(key, k1 -> this.world.a(vec3d, aabb));
+    }
+
+    static class CacheKey {
+        private final World world;
+        private final double posX, posY, posZ;
+        private final double minX, minY, minZ;
+        private final double maxX, maxY, maxZ;
+
+        public CacheKey(Explosion explosion, AxisAlignedBB aabb) {
+            this.world = explosion.world;
+            this.posX = explosion.posX;
+            this.posY = explosion.posY;
+            this.posZ = explosion.posZ;
+            this.minX = aabb.a;
+            this.minY = aabb.b;
+            this.minZ = aabb.c;
+            this.maxX = aabb.d;
+            this.maxY = aabb.e;
+            this.maxZ = aabb.f;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+
+            CacheKey cacheKey = (CacheKey) o;
+
+            if (Double.compare(cacheKey.posX, posX) != 0) return false;
+            if (Double.compare(cacheKey.posY, posY) != 0) return false;
+            if (Double.compare(cacheKey.posZ, posZ) != 0) return false;
+            if (Double.compare(cacheKey.minX, minX) != 0) return false;
+            if (Double.compare(cacheKey.minY, minY) != 0) return false;
+            if (Double.compare(cacheKey.minZ, minZ) != 0) return false;
+            if (Double.compare(cacheKey.maxX, maxX) != 0) return false;
+            if (Double.compare(cacheKey.maxY, maxY) != 0) return false;
+            if (Double.compare(cacheKey.maxZ, maxZ) != 0) return false;
+            return world.equals(cacheKey.world);
+        }
+
+        @Override
+        public int hashCode() {
+            int result;
+            long temp;
+            result = world.hashCode();
+            temp = Double.doubleToLongBits(posX);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(posY);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(posZ);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(minX);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(minY);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(minZ);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(maxX);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(maxY);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            temp = Double.doubleToLongBits(maxZ);
+            result = 31 * result + (int) (temp ^ (temp >>> 32));
+            return result;
+        }
+    }
+    // Paper end
+}

sources/src/main/java/net/minecraft/server/IntCache.java

@@ -0,0 +1,113 @@
+package net.minecraft.server;
+
+// NeonPaper start
+import it.unimi.dsi.fastutil.objects.ObjectArrayList;
+import java.lang.ref.WeakReference;
+import java.util.Iterator;
+import java.util.List;
+// NeonPaper end
+
+public class IntCache {
+    // NeonPaper start - Refactored IntCache to be thread local instead of static
+    private static final ThreadLocal<IntCache> caches = new ThreadLocal<IntCache>() {
+        @Override
+        protected IntCache initialValue() {
+            IntCache cache = new IntCache();
+            synchronized (ALL_CACHES) {
+                ALL_CACHES.add(new WeakReference<>(cache));
+            }
+            return new IntCache();
+        }
+    };
+
+    private static final List<WeakReference<IntCache>> ALL_CACHES = new ObjectArrayList<>();
+
+    private int a = 256;
+    private final List<int[]> b = new ObjectArrayList<>();
+    private final List<int[]> c = new ObjectArrayList<>();
+    private final List<int[]> d = new ObjectArrayList<>();
+    private final List<int[]> e = new ObjectArrayList<>();
+
+    private final int cacheLimit = org.spigotmc.SpigotConfig.intCacheLimit;
+
+    public static int[] a(int i) {
+        return caches.get().aNonStatic(i);
+    }
+
+    public int[] aNonStatic(int i) {
+        int[] aint;
+
+        if (i <= 256) {
+            if (this.b.isEmpty()) {
+                aint = new int[256];
+				if (c.size() < cacheLimit) this.c.add(aint);
+                return aint;
+            } else {
+                aint = this.b.remove(this.b.size() - 1);
+                if (c.size() < cacheLimit) this.c.add(aint);
+                return aint;
+            }
+        } else if (i > this.a) {
+            this.a = i;
+            this.d.clear();
+            this.e.clear();
+            aint = new int[this.a];
+            if (e.size() < cacheLimit) this.e.add(aint);
+            return aint;
+        } else if (this.d.isEmpty()) {
+            aint = new int[this.a];
+            if (e.size() < cacheLimit) this.e.add(aint);
+            return aint;
+        } else {
+            aint = this.d.remove(this.d.size() - 1);
+            if (e.size() < cacheLimit) this.e.add(aint);
+            return aint;
+        }
+    }
+
+    public static void a() {
+        caches.get().aNonStatic();
+    }
+
+    public void aNonStatic() {
+        if (!this.d.isEmpty()) {
+            this.d.remove(this.d.size() - 1);
+        }
+
+        if (!this.b.isEmpty()) {
+            this.b.remove(this.b.size() - 1);
+        }
+
+        this.d.addAll(this.e);
+        this.b.addAll(this.c);
+        this.e.clear();
+        this.c.clear();
+    }
+
+    public static String b() {
+        int cache = 0;
+        int tcache = 0;
+        int allocated = 0;
+        int tallocated = 0;
+        int numberOfCaches;
+
+        synchronized (ALL_CACHES) {
+            numberOfCaches = ALL_CACHES.size();
+            Iterator<WeakReference<IntCache>> iter = ALL_CACHES.iterator();
+            while (iter.hasNext()) {
+                WeakReference<IntCache> reference = iter.next();
+                IntCache intcache = reference.get();
+                if (intcache != null) {
+                    cache += intcache.d.size();
+                    tcache += intcache.b.size();
+                    allocated += intcache.e.size();
+                    tallocated += intcache.c.size();
+                } else {
+                    iter.remove();
+                }
+            }
+        }
+        return numberOfCaches + " IntCaches. In Total => cache: " + cache + ", tcache: " + tcache + ", allocated: " + allocated + ", tallocated: " + tallocated;
+    }
+// NeonPaper end
+}

sources/src/main/java/net/minecraft/server/ItemWorldMap.java

@@ -0,0 +1,367 @@
+package net.minecraft.server;
+
+import com.google.common.collect.HashMultiset;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Multisets;
+import javax.annotation.Nullable;
+
+// CraftBukkit start
+import org.bukkit.Bukkit;
+import org.bukkit.event.server.MapInitializeEvent;
+// CraftBukkit end
+
+public class ItemWorldMap extends ItemWorldMapBase {
+
+    protected ItemWorldMap() {
+        this.a(true);
+    }
+
+    public static ItemStack a(World world, double d0, double d1, byte b0, boolean flag, boolean flag1) {
+        World worldMain = world.getServer().getServer().worlds.get(0); // CraftBukkit - store reference to primary world
+        ItemStack itemstack = new ItemStack(Items.FILLED_MAP, 1, worldMain.b("map")); // CraftBukkit - use primary world for maps
+        String s = "map_" + itemstack.getData();
+        WorldMap worldmap = new WorldMap(s);
+
+        worldMain.a(s, (PersistentBase) worldmap); // CraftBukkit
+        worldmap.scale = b0;
+        worldmap.a(d0, d1, worldmap.scale);
+        worldmap.map = (byte) ((WorldServer) world).dimension; // CraftBukkit - use bukkit dimension
+        worldmap.track = flag;
+        worldmap.unlimitedTracking = flag1;
+        worldmap.c();
+        org.bukkit.craftbukkit.event.CraftEventFactory.callEvent(new org.bukkit.event.server.MapInitializeEvent(worldmap.mapView)); // CraftBukkit
+        return itemstack;
+    }
+
+    @Nullable
+    public WorldMap getSavedMap(ItemStack itemstack, World world) {
+        World worldMain = world.getServer().getServer().worlds.get(0); // CraftBukkit - store reference to primary world
+        String s = "map_" + itemstack.getData();
+        WorldMap worldmap = (WorldMap) worldMain.a(WorldMap.class, s); // CraftBukkit - use primary world for maps
+
+        if (worldmap == null && !world.isClientSide) {
+            itemstack.setData(worldMain.b("map")); // CraftBukkit - use primary world for maps
+            s = "map_" + itemstack.getData();
+            worldmap = new WorldMap(s);
+            worldmap.scale = 3;
+            worldmap.a((double) world.getWorldData().b(), (double) world.getWorldData().d(), worldmap.scale);
+            worldmap.map = (byte) ((WorldServer) world).dimension; // CraftBukkit - fixes Bukkit multiworld maps
+            worldmap.c();
+            worldMain.a(s, (PersistentBase) worldmap); // CraftBukkit - use primary world for maps
+
+            // CraftBukkit start
+            MapInitializeEvent event = new MapInitializeEvent(worldmap.mapView);
+            Bukkit.getServer().getPluginManager().callEvent(event);
+            // CraftBukkit end
+        }
+
+        return worldmap;
+    }
+
+    public void a(World world, Entity entity, WorldMap worldmap) {
+        // CraftBukkit - world.worldProvider -> ((WorldServer) world)
+        if (((WorldServer) world).dimension == worldmap.map && entity instanceof EntityHuman) {
+            int i = 1 << worldmap.scale;
+            int j = worldmap.centerX;
+            int k = worldmap.centerZ;
+            int l = MathHelper.floor(entity.locX - (double) j) / i + 64;
+            int i1 = MathHelper.floor(entity.locZ - (double) k) / i + 64;
+            int j1 = 128 / i;
+
+            if (world.worldProvider.n()) {
+                j1 /= 2;
+            }
+
+            WorldMap.WorldMapHumanTracker worldmap_worldmaphumantracker = worldmap.a((EntityHuman) entity);
+
+            ++worldmap_worldmaphumantracker.b;
+            boolean flag = false;
+
+            for (int k1 = l - j1 + 1; k1 < l + j1; ++k1) {
+                if ((k1 & 15) == (worldmap_worldmaphumantracker.b & 15) || flag) {
+                    flag = false;
+                    double d0 = 0.0D;
+
+                    for (int l1 = i1 - j1 - 1; l1 < i1 + j1; ++l1) {
+                        if (k1 >= 0 && l1 >= -1 && k1 < 128 && l1 < 128) {
+                            int i2 = k1 - l;
+                            int j2 = l1 - i1;
+                            boolean flag1 = i2 * i2 + j2 * j2 > (j1 - 2) * (j1 - 2);
+                            int k2 = (j / i + k1 - 64) * i;
+                            int l2 = (k / i + l1 - 64) * i;
+                            HashMultiset hashmultiset = HashMultiset.create();
+                            Chunk chunk = world.getChunkIfLoaded(new BlockPosition(k2, 0, l2)); // NeonPaper - Maps shouldn't load chunks
+
+                            if (chunk != null && !chunk.isEmpty()) { // NeonPaper - Maps shouldn't load chunks
+                                int i3 = k2 & 15;
+                                int j3 = l2 & 15;
+                                int k3 = 0;
+                                double d1 = 0.0D;
+
+                                if (world.worldProvider.n()) {
+                                    int l3 = k2 + l2 * 231871;
+
+                                    l3 = l3 * l3 * 31287121 + l3 * 11;
+                                    if ((l3 >> 20 & 1) == 0) {
+                                        hashmultiset.add(Blocks.DIRT.getBlockData().set(BlockDirt.VARIANT, BlockDirt.EnumDirtVariant.DIRT).a((IBlockAccess) world, BlockPosition.ZERO), 10);
+                                    } else {
+                                        hashmultiset.add(Blocks.STONE.getBlockData().set(BlockStone.VARIANT, BlockStone.EnumStoneVariant.STONE).a((IBlockAccess) world, BlockPosition.ZERO), 100);
+                                    }
+
+                                    d1 = 100.0D;
+                                } else {
+                                    BlockPosition.MutableBlockPosition blockposition_mutableblockposition = new BlockPosition.MutableBlockPosition();
+
+                                    for (int i4 = 0; i4 < i; ++i4) {
+                                        for (int j4 = 0; j4 < i; ++j4) {
+                                            int k4 = chunk.b(i4 + i3, j4 + j3) + 1;
+                                            IBlockData iblockdata = Blocks.AIR.getBlockData();
+
+                                            if (k4 > 1) {
+                                                do {
+                                                    --k4;
+                                                    iblockdata = chunk.a(i4 + i3, k4, j4 + j3);
+                                                    blockposition_mutableblockposition.c((chunk.locX << 4) + i4 + i3, k4, (chunk.locZ << 4) + j4 + j3);
+                                                } while (iblockdata.a((IBlockAccess) world, blockposition_mutableblockposition) == MaterialMapColor.c && k4 > 0);
+
+                                                if (k4 > 0 && iblockdata.getMaterial().isLiquid()) {
+                                                    int l4 = k4 - 1;
+
+                                                    IBlockData iblockdata1;
+
+                                                    do {
+                                                        iblockdata1 = chunk.a(i4 + i3, l4--, j4 + j3);
+                                                        ++k3;
+                                                    } while (l4 > 0 && iblockdata1.getMaterial().isLiquid());
+                                                }
+                                            } else {
+                                                iblockdata = Blocks.BEDROCK.getBlockData();
+                                            }
+
+                                            d1 += (double) k4 / (double) (i * i);
+                                            hashmultiset.add(iblockdata.a((IBlockAccess) world, blockposition_mutableblockposition));
+                                        }
+                                    }
+                                }
+
+                                k3 /= i * i;
+                                double d2 = (d1 - d0) * 4.0D / (double) (i + 4) + ((double) (k1 + l1 & 1) - 0.5D) * 0.4D;
+                                byte b0 = 1;
+
+                                if (d2 > 0.6D) {
+                                    b0 = 2;
+                                }
+
+                                if (d2 < -0.6D) {
+                                    b0 = 0;
+                                }
+
+                                MaterialMapColor materialmapcolor = (MaterialMapColor) Iterables.getFirst(Multisets.copyHighestCountFirst(hashmultiset), MaterialMapColor.c);
+
+                                if (materialmapcolor == MaterialMapColor.o) {
+                                    d2 = (double) k3 * 0.1D + (double) (k1 + l1 & 1) * 0.2D;
+                                    b0 = 1;
+                                    if (d2 < 0.5D) {
+                                        b0 = 2;
+                                    }
+
+                                    if (d2 > 0.9D) {
+                                        b0 = 0;
+                                    }
+                                }
+
+                                d0 = d1;
+                                if (l1 >= 0 && i2 * i2 + j2 * j2 < j1 * j1 && (!flag1 || (k1 + l1 & 1) != 0)) {
+                                    byte b1 = worldmap.colors[k1 + l1 * 128];
+                                    byte b2 = (byte) (materialmapcolor.ad * 4 + b0);
+
+                                    if (b1 != b2) {
+                                        worldmap.colors[k1 + l1 * 128] = b2;
+                                        worldmap.flagDirty(k1, l1);
+                                        flag = true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+        }
+    }
+
+    public static void a(World world, ItemStack itemstack) {
+        if (itemstack.getItem() == Items.FILLED_MAP) {
+            WorldMap worldmap = Items.FILLED_MAP.getSavedMap(itemstack, world);
+
+            if (worldmap != null) {
+                if (world.worldProvider.getDimensionManager().getDimensionID() == worldmap.map) {
+                    int i = 1 << worldmap.scale;
+                    int j = worldmap.centerX;
+                    int k = worldmap.centerZ;
+                    BiomeBase[] abiomebase = world.getWorldChunkManager().a((BiomeBase[]) null, (j / i - 64) * i, (k / i - 64) * i, 128 * i, 128 * i, false);
+
+                    for (int l = 0; l < 128; ++l) {
+                        for (int i1 = 0; i1 < 128; ++i1) {
+                            int j1 = l * i;
+                            int k1 = i1 * i;
+                            BiomeBase biomebase = abiomebase[j1 + k1 * 128 * i];
+                            MaterialMapColor materialmapcolor = MaterialMapColor.c;
+                            int l1 = 3;
+                            int i2 = 8;
+
+                            if (l > 0 && i1 > 0 && l < 127 && i1 < 127) {
+                                if (abiomebase[(l - 1) * i + (i1 - 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[(l - 1) * i + (i1 + 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[(l - 1) * i + i1 * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[(l + 1) * i + (i1 - 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[(l + 1) * i + (i1 + 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[(l + 1) * i + i1 * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[l * i + (i1 - 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (abiomebase[l * i + (i1 + 1) * i * 128 * i].j() >= 0.0F) {
+                                    --i2;
+                                }
+
+                                if (biomebase.j() < 0.0F) {
+                                    materialmapcolor = MaterialMapColor.r;
+                                    if (i2 > 7 && i1 % 2 == 0) {
+                                        l1 = (l + (int) (MathHelper.sin((float) i1 + 0.0F) * 7.0F)) / 8 % 5;
+                                        if (l1 == 3) {
+                                            l1 = 1;
+                                        } else if (l1 == 4) {
+                                            l1 = 0;
+                                        }
+                                    } else if (i2 > 7) {
+                                        materialmapcolor = MaterialMapColor.c;
+                                    } else if (i2 > 5) {
+                                        l1 = 1;
+                                    } else if (i2 > 3) {
+                                        l1 = 0;
+                                    } else if (i2 > 1) {
+                                        l1 = 0;
+                                    }
+                                } else if (i2 > 0) {
+                                    materialmapcolor = MaterialMapColor.C;
+                                    if (i2 > 3) {
+                                        l1 = 1;
+                                    } else {
+                                        l1 = 3;
+                                    }
+                                }
+                            }
+
+                            if (materialmapcolor != MaterialMapColor.c) {
+                                worldmap.colors[l + i1 * 128] = (byte) (materialmapcolor.ad * 4 + l1);
+                                worldmap.flagDirty(l, i1);
+                            }
+                        }
+                    }
+
+                }
+            }
+        }
+    }
+
+    public void a(ItemStack itemstack, World world, Entity entity, int i, boolean flag) {
+        if (!world.isClientSide) {
+            WorldMap worldmap = this.getSavedMap(itemstack, world);
+
+            if (entity instanceof EntityHuman) {
+                EntityHuman entityhuman = (EntityHuman) entity;
+
+                worldmap.a(entityhuman, itemstack);
+            }
+
+            if (flag || entity instanceof EntityHuman && ((EntityHuman) entity).getItemInOffHand() == itemstack) {
+                this.a(world, entity, worldmap);
+            }
+
+        }
+    }
+
+    @Nullable
+    public Packet<?> a(ItemStack itemstack, World world, EntityHuman entityhuman) {
+        return this.getSavedMap(itemstack, world).a(itemstack, world, entityhuman);
+    }
+
+    public void b(ItemStack itemstack, World world, EntityHuman entityhuman) {
+        NBTTagCompound nbttagcompound = itemstack.getTag();
+
+        if (nbttagcompound != null) {
+            if (nbttagcompound.hasKeyOfType("map_scale_direction", 99)) {
+                a(itemstack, world, nbttagcompound.getInt("map_scale_direction"));
+                nbttagcompound.remove("map_scale_direction");
+            } else if (nbttagcompound.getBoolean("map_tracking_position")) {
+                b(itemstack, world);
+                nbttagcompound.remove("map_tracking_position");
+            }
+        }
+
+    }
+
+    protected static void a(ItemStack itemstack, World world, int i) {
+        WorldMap worldmap = Items.FILLED_MAP.getSavedMap(itemstack, world);
+
+        world = world.getServer().getServer().worlds.get(0); // CraftBukkit - use primary world for maps
+        itemstack.setData(world.b("map"));
+        WorldMap worldmap1 = new WorldMap("map_" + itemstack.getData());
+
+        if (worldmap != null) {
+            worldmap1.scale = (byte) MathHelper.clamp(worldmap.scale + i, 0, 4);
+            worldmap1.track = worldmap.track;
+            worldmap1.a((double) worldmap.centerX, (double) worldmap.centerZ, worldmap1.scale);
+            worldmap1.map = worldmap.map;
+            worldmap1.c();
+            world.a("map_" + itemstack.getData(), (PersistentBase) worldmap1);
+            // CraftBukkit start
+            MapInitializeEvent event = new MapInitializeEvent(worldmap1.mapView);
+            Bukkit.getServer().getPluginManager().callEvent(event);
+            // CraftBukkit end
+        }
+
+    }
+
+    protected static void b(ItemStack itemstack, World world) {
+        WorldMap worldmap = Items.FILLED_MAP.getSavedMap(itemstack, world);
+
+        world = world.getServer().getServer().worlds.get(0); // CraftBukkit - use primary world for maps
+        itemstack.setData(world.b("map"));
+        WorldMap worldmap1 = new WorldMap("map_" + itemstack.getData());
+
+        worldmap1.track = true;
+        if (worldmap != null) {
+            worldmap1.centerX = worldmap.centerX;
+            worldmap1.centerZ = worldmap.centerZ;
+            worldmap1.scale = worldmap.scale;
+            worldmap1.map = worldmap.map;
+            worldmap1.c();
+            world.a("map_" + itemstack.getData(), (PersistentBase) worldmap1);
+            // CraftBukkit start
+            MapInitializeEvent event = new MapInitializeEvent(worldmap1.mapView);
+            Bukkit.getServer().getPluginManager().callEvent(event);
+            // CraftBukkit end
+        }
+
+    }
+}

sources/src/main/java/net/minecraft/server/NetworkManager.java

@@ -365,8 +365,11 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
 
     @Override
     protected void channelRead0(ChannelHandlerContext channelhandlercontext, Packet object) throws Exception { // CraftBukkit - fix decompile error
+        // FlamePaper - Check if channel is opened before reading packet
+        if (isConnected()) {
             this.a(channelhandlercontext, object);
         }
+    }
 
     public static class QueuedPacket { // Akarin - default -> public
 

sources/src/main/java/net/minecraft/server/PlayerConnection.java

@@ -916,6 +916,11 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
         case START_DESTROY_BLOCK:
         case ABORT_DESTROY_BLOCK:
         case STOP_DESTROY_BLOCK:
+            // NeonPaper start - Don't allow digging in unloaded chunks
+            if (!worldserver.isChunkLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4, true)) {
+                 return;
+            }
+            // NeonPaper end - Don't allow digging in unloaded chunks
             double d0 = this.player.locX - ((double) blockposition.getX() + 0.5D);
             double d1 = this.player.locY - ((double) blockposition.getY() + 0.5D) + 1.5D;
             double d2 = this.player.locZ - ((double) blockposition.getZ() + 0.5D);

sources/src/main/java/net/minecraft/server/PlayerInteractManager.java

@@ -0,0 +1,568 @@
+package net.minecraft.server;
+
+// CraftBukkit start
+import java.util.ArrayList;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.Event;
+import org.bukkit.event.block.Action;
+import org.bukkit.event.player.PlayerInteractEvent;
+// CraftBukkit end
+
+public class PlayerInteractManager {
+
+    public World world;
+    public EntityPlayer player;
+    private EnumGamemode gamemode;
+    private boolean d;
+    private int lastDigTick;
+    private BlockPosition f;
+    private int currentTick;
+    private boolean h;
+    private BlockPosition i;
+    private int j;
+    private int k;
+
+    public PlayerInteractManager(World world) {
+        this.gamemode = EnumGamemode.NOT_SET;
+        this.f = BlockPosition.ZERO;
+        this.i = BlockPosition.ZERO;
+        this.k = -1;
+        this.world = world;
+    }
+
+    public void setGameMode(EnumGamemode enumgamemode) {
+        this.gamemode = enumgamemode;
+        enumgamemode.a(this.player.abilities);
+        this.player.updateAbilities();
+        this.player.server.getPlayerList().sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_GAME_MODE, new EntityPlayer[] { this.player}), this.player); // CraftBukkit
+        this.world.everyoneSleeping();
+    }
+
+    public EnumGamemode getGameMode() {
+        return this.gamemode;
+    }
+
+    public boolean c() {
+        return this.gamemode.e();
+    }
+
+    public boolean isCreative() {
+        return this.gamemode.isCreative();
+    }
+
+    public void b(EnumGamemode enumgamemode) {
+        if (this.gamemode == EnumGamemode.NOT_SET) {
+            this.gamemode = enumgamemode;
+        }
+
+        this.setGameMode(this.gamemode);
+    }
+
+    public void a() {
+        this.currentTick = MinecraftServer.currentTick; // CraftBukkit;
+        float f;
+        int i;
+
+        if (this.h) {
+            int j = this.currentTick - this.j;
+            IBlockData iblockdata = this.world.getType(this.i);
+
+            if (iblockdata.getMaterial() == Material.AIR) {
+                this.h = false;
+            } else {
+                f = iblockdata.a((EntityHuman) this.player, this.player.world, this.i) * (float) (j + 1);
+                i = (int) (f * 10.0F);
+                if (i != this.k) {
+                    this.world.c(this.player.getId(), this.i, i);
+                    this.k = i;
+                }
+
+                if (f >= 1.0F) {
+                    this.h = false;
+                    this.breakBlock(this.i);
+                }
+            }
+        } else if (this.d) {
+            IBlockData iblockdata1 = this.world.getType(this.f);
+
+            if (iblockdata1.getMaterial() == Material.AIR) {
+                this.world.c(this.player.getId(), this.f, -1);
+                this.k = -1;
+                this.d = false;
+            } else {
+                int k = this.currentTick - this.lastDigTick;
+
+                f = iblockdata1.a((EntityHuman) this.player, this.player.world, this.i) * (float) (k + 1);
+                i = (int) (f * 10.0F);
+                if (i != this.k) {
+                    this.world.c(this.player.getId(), this.f, i);
+                    this.k = i;
+                }
+            }
+        }
+
+    }
+
+    public void a(BlockPosition blockposition, EnumDirection enumdirection) {
+        // CraftBukkit start
+        PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_BLOCK, blockposition, enumdirection, this.player.inventory.getItemInHand(), EnumHand.MAIN_HAND);
+        if (event.isCancelled()) {
+            // Let the client know the block still exists
+            ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+            cancelBreakBlock(blockposition, this.world.getType(blockposition)); // Paper - Avoid visual issues on the client
+            // Update any tile entity data for this block
+            TileEntity tileentity = this.world.getTileEntity(blockposition);
+            if (tileentity != null) {
+                this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
+            }
+            return;
+        }
+        // CraftBukkit end
+        if (this.isCreative()) {
+            if (!this.world.douseFire((EntityHuman) null, blockposition, enumdirection)) {
+                this.breakBlock(blockposition);
+            }
+
+        } else {
+            IBlockData iblockdata = this.world.getType(blockposition);
+            Block block = iblockdata.getBlock();
+
+            if (this.gamemode.c()) {
+                if (this.gamemode == EnumGamemode.SPECTATOR) {
+                    return;
+                }
+
+                if (!this.player.dk()) {
+                    ItemStack itemstack = this.player.getItemInMainHand();
+
+                    if (itemstack.isEmpty()) {
+                        return;
+                    }
+
+                    if (!itemstack.a(block)) {
+                        return;
+                    }
+                }
+            }
+
+            // this.world.douseFire((EntityHuman) null, blockposition, enumdirection); // CraftBukkit - Moved down
+            this.lastDigTick = this.currentTick;
+            float f = 1.0F;
+
+            // CraftBukkit start - Swings at air do *NOT* exist.
+            if (event.useInteractedBlock() == Event.Result.DENY) {
+                // If we denied a door from opening, we need to send a correcting update to the client, as it already opened the door.
+                IBlockData data = this.world.getType(blockposition);
+                if (block == Blocks.WOODEN_DOOR) {
+                    // For some reason *BOTH* the bottom/top part have to be marked updated.
+                    boolean bottom = data.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
+                    ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                    ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, bottom ? blockposition.up() : blockposition.down()));
+                } else if (block == Blocks.TRAPDOOR) {
+                    ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                }
+            } else if (iblockdata.getMaterial() != Material.AIR) {
+                block.attack(this.world, blockposition, this.player);
+                f = iblockdata.a((EntityHuman) this.player, this.player.world, blockposition);
+                // Allow fire punching to be blocked
+                this.world.douseFire((EntityHuman) null, blockposition, enumdirection);
+            }
+
+            if (event.useItemInHand() == Event.Result.DENY) {
+                // If we 'insta destroyed' then the client needs to be informed.
+                if (f > 1.0f) {
+                    ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                }
+                return;
+            }
+            org.bukkit.event.block.BlockDamageEvent blockEvent = CraftEventFactory.callBlockDamageEvent(this.player, blockposition.getX(), blockposition.getY(), blockposition.getZ(), this.player.inventory.getItemInHand(), f >= 1.0f);
+
+            if (blockEvent.isCancelled()) {
+                // Let the client know the block still exists
+                ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                return;
+            }
+
+            if (blockEvent.getInstaBreak()) {
+                f = 2.0f;
+            }
+            // CraftBukkit end
+
+            if (iblockdata.getMaterial() != Material.AIR && f >= 1.0F) {
+                this.breakBlock(blockposition);
+            } else {
+                this.d = true;
+                this.f = blockposition;
+                int i = (int) (f * 10.0F);
+
+                this.world.c(this.player.getId(), blockposition, i);
+                this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, blockposition)); // Paper - MC-54026 - backport from 1.13
+                this.k = i;
+            }
+
+        }
+
+        this.world.chunkPacketBlockController.updateNearbyBlocks(this.world, blockposition); // Paper - Anti-Xray
+    }
+
+    public void a(BlockPosition blockposition) {
+        if (blockposition.equals(this.f)) {
+            this.currentTick = MinecraftServer.currentTick; // CraftBukkit
+            int i = this.currentTick - this.lastDigTick;
+            IBlockData iblockdata = this.world.getType(blockposition);
+
+            if (iblockdata.getMaterial() != Material.AIR) {
+                float f = iblockdata.a((EntityHuman) this.player, this.player.world, blockposition) * (float) (i + 1);
+
+                if (f >= 0.7F) {
+                    this.d = false;
+                    this.world.c(this.player.getId(), blockposition, -1);
+                    this.breakBlock(blockposition);
+                } else if (!this.h) {
+                    this.d = false;
+                    this.h = true;
+                    this.i = blockposition;
+                    this.j = this.lastDigTick;
+                }
+            }
+        // CraftBukkit start - Force block reset to client
+        } else {
+            this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+            // CraftBukkit end
+        }
+
+    }
+
+    public void e() {
+        this.d = false;
+        this.world.c(this.player.getId(), this.f, -1);
+    }
+
+    private boolean c(BlockPosition blockposition) {
+        IBlockData iblockdata = this.world.getType(blockposition);
+
+        iblockdata.getBlock().a(this.world, blockposition, iblockdata, (EntityHuman) this.player);
+        boolean flag = this.world.setAir(blockposition);
+
+        if (flag) {
+            iblockdata.getBlock().postBreak(this.world, blockposition, iblockdata);
+        }
+
+        return flag;
+    }
+
+    // Paper start - Extra method to avoid visual issues on the client when cancelling block breaks
+    private void cancelBreakBlock(BlockPosition position, IBlockData data) {
+        Block block = data.getBlock();
+        // Send other half of the door
+        if (block instanceof BlockDoor) {
+            boolean bottom = data.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
+            this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? position.up() : position.down()));
+        } else if (block instanceof BlockTallPlant) {
+            boolean bottom = data.get(BlockTallPlant.HALF) == BlockTallPlant.EnumTallPlantHalf.LOWER;
+            this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? position.up() : position.down()));
+        } else if (block instanceof BlockPistonExtension) {
+            BlockPosition piston = position.shift(data.get(BlockPistonExtension.FACING).opposite());
+            this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, piston));
+        } else if (block instanceof BlockBed) {
+            if (data.get(BlockBed.PART) == BlockBed.EnumBedPart.FOOT) {
+                // Restore head of bed
+                BlockPosition head = position.shift(data.get(BlockBed.FACING));
+                this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, head));
+
+                TileEntity tileentity = this.world.getTileEntity(head);
+                if (tileentity != null) {
+                    this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
+                }
+            }
+        }
+    }
+    // Paper end
+
+    public boolean breakBlock(BlockPosition blockposition) {
+        // CraftBukkit start - fire BlockBreakEvent
+        BlockBreakEvent event = null;
+
+        if (this.player instanceof EntityPlayer) {
+            org.bukkit.block.Block block = this.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+
+            // Sword + Creative mode pre-cancel
+            boolean isSwordNoBreak = this.gamemode.isCreative() && !this.player.getItemInMainHand().isEmpty() && this.player.getItemInMainHand().getItem() instanceof ItemSword;
+
+            // Tell client the block is gone immediately then process events
+            // Don't tell the client if its a creative sword break because its not broken!
+            if (world.getTileEntity(blockposition) == null && !isSwordNoBreak) {
+                PacketPlayOutBlockChange packet = new PacketPlayOutBlockChange(this.world, blockposition);
+                packet.block = Blocks.AIR.getBlockData();
+                ((EntityPlayer) this.player).playerConnection.sendPacket(packet);
+            }
+
+            event = new BlockBreakEvent(block, this.player.getBukkitEntity());
+
+            // Sword + Creative mode pre-cancel
+            event.setCancelled(isSwordNoBreak);
+
+            // Calculate default block experience
+            IBlockData nmsData = this.world.getType(blockposition);
+            Block nmsBlock = nmsData.getBlock();
+
+            ItemStack itemstack = this.player.getEquipment(EnumItemSlot.MAINHAND);
+
+            if (nmsBlock != null && !event.isCancelled() && !this.isCreative() && this.player.hasBlock(nmsBlock.getBlockData())) {
+                // Copied from block.a(World world, EntityHuman entityhuman, BlockPosition blockposition, IBlockData iblockdata, @Nullable TileEntity tileentity, ItemStack itemstack)
+                // PAIL: checkme each update
+                if (!(nmsBlock.o() && EnchantmentManager.getEnchantmentLevel(Enchantments.SILK_TOUCH, itemstack) > 0)) {
+                    int bonusLevel = EnchantmentManager.getEnchantmentLevel(Enchantments.LOOT_BONUS_BLOCKS, itemstack);
+
+                    event.setExpToDrop(nmsBlock.getExpDrop(this.world, nmsData, bonusLevel));
+                }
+            }
+
+            this.world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                if (isSwordNoBreak) {
+                    return false;
+                }
+                // Let the client know the block still exists
+                ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                cancelBreakBlock(blockposition, nmsData); // Paper - Move cancellation code to extra "cancelBreakBlock" method
+                // Update any tile entity data for this block
+                TileEntity tileentity = this.world.getTileEntity(blockposition);
+                if (tileentity != null) {
+                    this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
+                }
+                return false;
+            }
+        }
+        if (false && this.gamemode.isCreative() && !this.player.getItemInMainHand().isEmpty() && this.player.getItemInMainHand().getItem() instanceof ItemSword) { // CraftBukkit - false
+            return false;
+        } else {
+            IBlockData iblockdata = this.world.getType(blockposition);
+            if (iblockdata.getBlock() == Blocks.AIR) return false; // CraftBukkit - A plugin set block to air without cancelling
+            TileEntity tileentity = this.world.getTileEntity(blockposition);
+            Block block = iblockdata.getBlock();
+
+            // CraftBukkit start - Special case skulls, their item data comes from a tile entity (Also check if block should drop items)
+            if (iblockdata.getBlock() == Blocks.SKULL && !this.isCreative() && event.isDropItems()) {
+                iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
+                return this.c(blockposition);
+            }
+
+            // And shulker boxes too for duplication on cancel reasons (Also check if block should drop items)
+            if (iblockdata.getBlock() instanceof BlockShulkerBox && event.isDropItems()) {
+                iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
+                return this.c(blockposition);
+            }
+            // CraftBukkit end
+
+            if ((block instanceof BlockCommand || block instanceof BlockStructure) && !this.player.isCreativeAndOp()) {
+                this.world.notify(blockposition, iblockdata, iblockdata, 3);
+                return false;
+            } else {
+                if (this.gamemode.c()) {
+                    if (this.gamemode == EnumGamemode.SPECTATOR) {
+                        return false;
+                    }
+
+                    if (!this.player.dk()) {
+                        ItemStack itemstack = this.player.getItemInMainHand();
+
+                        if (itemstack.isEmpty()) {
+                            return false;
+                        }
+
+                        if (!itemstack.a(block)) {
+                            return false;
+                        }
+                    }
+                }
+
+                this.world.a(this.player, 2001, blockposition, Block.getCombinedId(iblockdata));
+                // CraftBukkit start
+                world.captureDrops = new ArrayList<>();
+                boolean flag = this.c(blockposition);
+                if (event.isDropItems()) {
+                    for (EntityItem item : world.captureDrops) {
+                        world.addEntity(item);
+                    }
+                }
+                world.captureDrops = null;
+                // CraftBukkit end
+
+                if (this.isCreative()) {
+                    this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+                } else {
+                    ItemStack itemstack1 = this.player.getItemInMainHand();
+					//ItemStack itemstack2 = itemstack1.isEmpty() ? ItemStack.a : itemstack1.cloneItemStack(); //NeonPaper move up
+                    boolean flag1 = this.player.hasBlock(iblockdata);
+					ItemStack itemstack2 = flag && flag1 && event.isDropItems() && !itemstack1.isEmpty() ? itemstack1.cloneItemStack() : ItemStack.a; // NeonPaper - clone before use
+
+                    if (!itemstack1.isEmpty()) {
+                        itemstack1.a(this.world, iblockdata, blockposition, this.player);
+                    }
+
+                    // CraftBukkit start - Check if block should drop items
+                    if (flag && flag1 && event.isDropItems()) {
+                        iblockdata.getBlock().a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack2);
+                    }
+                    // CraftBukkit end
+                }
+
+                // CraftBukkit start - Drop event experience
+                if (flag && event != null) {
+                    iblockdata.getBlock().dropExperience(this.world, blockposition, event.getExpToDrop(), this.player); // Paper
+                }
+                // CraftBukkit end
+
+                return flag;
+            }
+        }
+    }
+
+    public EnumInteractionResult a(EntityHuman entityhuman, World world, ItemStack itemstack, EnumHand enumhand) {
+        if (this.gamemode == EnumGamemode.SPECTATOR) {
+            return EnumInteractionResult.PASS;
+        } else if (entityhuman.getCooldownTracker().a(itemstack.getItem())) {
+            return EnumInteractionResult.PASS;
+        } else {
+            int i = itemstack.getCount();
+            int j = itemstack.getData();
+            InteractionResultWrapper interactionresultwrapper = itemstack.a(world, entityhuman, enumhand);
+            ItemStack itemstack1 = (ItemStack) interactionresultwrapper.b();
+
+            if (itemstack1 == itemstack && itemstack1.getCount() == i && itemstack1.m() <= 0 && itemstack1.getData() == j) {
+                return interactionresultwrapper.a();
+            } else if (interactionresultwrapper.a() == EnumInteractionResult.FAIL && itemstack1.m() > 0 && !entityhuman.isHandRaised()) {
+                return interactionresultwrapper.a();
+            } else {
+                entityhuman.a(enumhand, itemstack1);
+                if (this.isCreative()) {
+                    itemstack1.setCount(i);
+                    if (itemstack1.f()) {
+                        itemstack1.setData(j);
+                    }
+                }
+
+                if (itemstack1.isEmpty()) {
+                    entityhuman.a(enumhand, ItemStack.a);
+                }
+
+                if (!entityhuman.isHandRaised()) {
+                    ((EntityPlayer) entityhuman).updateInventory(entityhuman.defaultContainer);
+                }
+
+                return interactionresultwrapper.a();
+            }
+        }
+    }
+
+    // CraftBukkit start - whole method
+    public boolean interactResult = false;
+    public boolean firedInteract = false;
+    public EnumInteractionResult a(EntityHuman entityhuman, World world, ItemStack itemstack, EnumHand enumhand, BlockPosition blockposition, EnumDirection enumdirection, float f, float f1, float f2) {
+        IBlockData blockdata = world.getType(blockposition);
+        EnumInteractionResult enuminteractionresult = EnumInteractionResult.FAIL;
+        if (blockdata.getBlock() != Blocks.AIR) {
+            boolean cancelledBlock = false;
+
+            if (this.gamemode == EnumGamemode.SPECTATOR) {
+                TileEntity tileentity = world.getTileEntity(blockposition);
+                cancelledBlock = !(tileentity instanceof ITileInventory || tileentity instanceof IInventory);
+            }
+
+            if (entityhuman.getCooldownTracker().a(itemstack.getItem())) {
+                cancelledBlock = true;
+            }
+
+            if (itemstack.getItem() instanceof ItemBlock && !entityhuman.isCreativeAndOp()) {
+                Block block1 = ((ItemBlock) itemstack.getItem()).getBlock();
+
+                if (block1 instanceof BlockCommand || block1 instanceof BlockStructure) {
+                    cancelledBlock = true;
+                }
+            }
+
+            PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(entityhuman, Action.RIGHT_CLICK_BLOCK, blockposition, enumdirection, itemstack, cancelledBlock, enumhand);
+            firedInteract = true;
+            interactResult = event.useItemInHand() == Event.Result.DENY;
+
+            if (event.useInteractedBlock() == Event.Result.DENY) {
+                // If we denied a door from opening, we need to send a correcting update to the client, as it already opened the door.
+                if (blockdata.getBlock() instanceof BlockDoor) {
+                    boolean bottom = blockdata.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
+                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? blockposition.up() : blockposition.down()));
+                } else if (blockdata.getBlock() instanceof BlockCake) {
+                    ((EntityPlayer) entityhuman).getBukkitEntity().sendHealthUpdate(); // SPIGOT-1341 - reset health for cake
+                // Paper start - extend Player Interact cancellation
+                } else if (blockdata.getBlock() instanceof BlockStructure) {
+                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
+                } else if (blockdata.getBlock() instanceof BlockCommand) {
+                    ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
+                } else if (blockdata.getBlock() instanceof BlockFlowerPot) {
+                    // Send a block change to air and then send back the correct block, just to make the client happy
+                    PacketPlayOutBlockChange packet = new PacketPlayOutBlockChange(this.world, blockposition);
+                    packet.block = Blocks.AIR.getBlockData();
+                    this.player.playerConnection.sendPacket(packet);
+
+                    this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
+
+                    TileEntity tileentity = this.world.getTileEntity(blockposition);
+                    if (tileentity != null) {
+                        player.playerConnection.sendPacket(tileentity.getUpdatePacket());
+                    }
+                // Paper end - extend Player Interact cancellation
+                }
+                ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory(); // SPIGOT-2867
+                enuminteractionresult = (event.useItemInHand() != Event.Result.ALLOW) ? EnumInteractionResult.SUCCESS : EnumInteractionResult.PASS;
+            } else if (this.gamemode == EnumGamemode.SPECTATOR) {
+                TileEntity tileentity = world.getTileEntity(blockposition);
+
+                if (tileentity instanceof ITileInventory) {
+                    Block block = world.getType(blockposition).getBlock();
+                    ITileInventory itileinventory = (ITileInventory) tileentity;
+
+                    if (itileinventory instanceof TileEntityChest && block instanceof BlockChest) {
+                        itileinventory = ((BlockChest) block).getInventory(world, blockposition);
+                    }
+
+                    if (itileinventory != null) {
+                        entityhuman.openContainer(itileinventory);
+                        return EnumInteractionResult.SUCCESS;
+                    }
+                } else if (tileentity instanceof IInventory) {
+                    entityhuman.openContainer((IInventory) tileentity);
+                    return EnumInteractionResult.SUCCESS;
+                }
+
+                return EnumInteractionResult.PASS;
+            } else {
+                if (!entityhuman.isSneaking() || entityhuman.getItemInMainHand().isEmpty() && entityhuman.getItemInOffHand().isEmpty()) {
+                    IBlockData iblockdata = world.getType(blockposition);
+
+                    enuminteractionresult = iblockdata.getBlock().interact(world, blockposition, iblockdata, entityhuman, enumhand, enumdirection, f, f1, f2) ? EnumInteractionResult.SUCCESS : EnumInteractionResult.PASS;
+                }
+            }
+
+            if (!itemstack.isEmpty() && enuminteractionresult != EnumInteractionResult.SUCCESS && !interactResult) { // add !interactResult SPIGOT-764
+                int i = itemstack.getData();
+                int j = itemstack.getCount();
+
+                enuminteractionresult = itemstack.placeItem(entityhuman, world, blockposition, enumhand, enumdirection, f, f1, f2);
+
+                // The item count should not decrement in Creative mode.
+                if (this.isCreative()) {
+                    itemstack.setData(i);
+                    itemstack.setCount(j);
+                }
+            }
+        }
+        return enuminteractionresult;
+        // CraftBukkit end
+    }
+
+    public void a(WorldServer worldserver) {
+        this.world = worldserver;
+    }
+}

sources/src/main/java/net/minecraft/server/PlayerList.java

@@ -558,9 +558,10 @@ public abstract class PlayerList {
         Player player = entity.getBukkitEntity();
         PlayerLoginEvent event = new PlayerLoginEvent(player, hostname, ((java.net.InetSocketAddress) socketaddress).getAddress(), ((java.net.InetSocketAddress) loginlistener.networkManager.getRawAddress()).getAddress());
         String s;
-
-        if (getProfileBans().isBanned(gameprofile) && !getProfileBans().get(gameprofile).hasExpired()) {
-            GameProfileBanEntry gameprofilebanentry = this.k.get(gameprofile);
+        // NeonPaper start - Fix MC-158900
+        GameProfileBanEntry gameprofilebanentry;
+        if (getProfileBans().isBanned(gameprofile) && (gameprofilebanentry = getProfileBans().get(gameprofile)) != null) {
+        // NeonPaper end
 
             s = LocaleI18n.a(AkarinGlobalConfig.messageBan,
                     gameprofilebanentry.getReason().equals(Akari.EMPTY_STRING) ? Akari.EMPTY_STRING : AkarinGlobalConfig.messageBanReason + gameprofilebanentry.getReason(),

sources/src/main/java/net/minecraft/server/SpawnerCreature.java

@@ -0,0 +1,356 @@
+package net.minecraft.server;
+
+import com.google.common.collect.Sets;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Random;
+import java.util.Set;
+
+// CraftBukkit start
+import com.destroystokyo.paper.exception.ServerInternalException;
+import org.bukkit.craftbukkit.util.LongHash;
+import org.bukkit.craftbukkit.util.LongHashSet;
+import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
+// CraftBukkit end
+
+public final class SpawnerCreature {
+
+    private static final int a = (int) Math.pow(17.0D, 2.0D);
+    private final LongHashSet b = new LongHashSet(); // CraftBukkit
+
+    public SpawnerCreature() {}
+
+    // Spigot start - get entity count only from chunks being processed in b
+    private int getEntityCount(WorldServer server, Class oClass)
+    {
+        // Paper start - use entire world, not just active chunks. Spigot broke vanilla expectations.
+        if (true) {
+            int sum = 0;
+            for (Chunk c : server.getChunkProviderServer().chunks.values()) {
+                sum += c.entityCount.get(oClass);
+            }
+            return sum;
+        }
+        // Paper end
+        int i = 0;
+        Iterator<Long> it = this.b.iterator();
+        while ( it.hasNext() )
+        {
+            Long coord = it.next();
+            int x = LongHash.msw( coord );
+            int z = LongHash.lsw( coord );
+            if ( !((ChunkProviderServer)server.chunkProvider).unloadQueue.contains( coord ) && server.isChunkLoaded( x, z, true ) )
+            {
+                i += server.getChunkAt( x, z ).entityCount.get( oClass );
+            }
+        }
+        return i;
+    }
+    // Spigot end
+
+    public int a(WorldServer worldserver, boolean flag, boolean flag1, boolean flag2) {
+        org.spigotmc.AsyncCatcher.catchOp("check for eligible spawn chunks"); // Paper - At least until we figure out what is calling this async
+        if (!flag && !flag1) {
+            return 0;
+        } else {
+            this.b.clear();
+            int i = 0;
+            Iterator iterator = worldserver.players.iterator();
+
+            int j;
+            int k;
+
+            while (iterator.hasNext()) {
+                EntityHuman entityhuman = (EntityHuman) iterator.next();
+
+                if (!entityhuman.isSpectator() && entityhuman.affectsSpawning) {
+                    int l = MathHelper.floor(entityhuman.locX / 16.0D);
+
+                    j = MathHelper.floor(entityhuman.locZ / 16.0D);
+                    boolean flag3 = true;
+                    // Spigot Start
+                    byte b0 = worldserver.spigotConfig.mobSpawnRange;
+                    b0 = ( b0 > worldserver.spigotConfig.viewDistance ) ? (byte) worldserver.spigotConfig.viewDistance : b0;
+                    b0 = ( b0 > 8 ) ? 8 : b0;
+                    // Paper start
+                    com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent event;
+                    event = new com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent(
+                            (org.bukkit.entity.Player) entityhuman.getBukkitEntity(), b0);
+                    if (!event.callEvent()) {
+                        continue;
+                    }
+                    b0 = event.getSpawnRadius();
+                    // Paperr end
+
+                    for (int i1 = -b0; i1 <= b0; ++i1) {
+                        for (k = -b0; k <= b0; ++k) {
+                            boolean flag4 = i1 == -b0 || i1 == b0 || k == -b0 || k == b0;
+                            // Spigot End
+                            ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i1 + l, k + j);
+
+                            // CraftBukkit start - use LongHash and LongHashSet
+                            long chunkCoords = LongHash.toLong(chunkcoordintpair.x, chunkcoordintpair.z);
+                            if (!this.b.contains(chunkCoords)) {
+                                ++i;
+                                if (!flag4 && worldserver.isChunkLoaded(chunkcoordintpair.x, chunkcoordintpair.z, true) && worldserver.getWorldBorder().isInBounds(chunkcoordintpair)) {
+                                    PlayerChunk playerchunk = worldserver.getPlayerChunkMap().getChunk(chunkcoordintpair.x, chunkcoordintpair.z);
+
+                                    if (playerchunk != null && playerchunk.e()) {
+                                        this.b.add(chunkCoords);
+                                        // CraftBukkit end
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            int j1 = 0;
+            BlockPosition blockposition = worldserver.getSpawn();
+            EnumCreatureType[] aenumcreaturetype = EnumCreatureType.values();
+
+            j = aenumcreaturetype.length;
+
+            for (int k1 = 0; k1 < j; ++k1) {
+                EnumCreatureType enumcreaturetype = aenumcreaturetype[k1];
+
+               // CraftBukkit start - Use per-world spawn limits
+                int limit = enumcreaturetype.b();
+                switch (enumcreaturetype) {
+                    case MONSTER:
+                        limit = worldserver.getWorld().getMonsterSpawnLimit();
+                        break;
+                    case CREATURE:
+                        limit = worldserver.getWorld().getAnimalSpawnLimit();
+                        break;
+                    case WATER_CREATURE:
+                        limit = worldserver.getWorld().getWaterAnimalSpawnLimit();
+                        break;
+                    case AMBIENT:
+                        limit = worldserver.getWorld().getAmbientSpawnLimit();
+                        break;
+                }
+
+                if (limit == 0) {
+                    continue;
+                }
+				int mobcnt = 0; // Spigot
+                // CraftBukkit end
+
+                if ((!enumcreaturetype.d() || flag1) && (enumcreaturetype.d() || flag) && (!enumcreaturetype.e() || flag2)) {
+                    /* Paper start - As far as I can tell neither of these are even used
+                    k = worldserver.a(enumcreaturetype.a());
+                    int l1 = limit * i / a; // CraftBukkit - use per-world limits
+                    */ // Paper end
+
+                    if ((mobcnt = getEntityCount(worldserver, enumcreaturetype.a())) <= limit * i / 289) { // Paper - use 17x17 like vanilla (a at top of file)
+                        BlockPosition.MutableBlockPosition blockposition_mutableblockposition = new BlockPosition.MutableBlockPosition();
+                        Iterator iterator1 = this.b.iterator();
+
+                        int moblimit = (limit * i / 256) - mobcnt + 1; // Spigot - up to 1 more than limit
+                        label120:
+                        while (iterator1.hasNext() && (moblimit > 0)) { // Spigot - while more allowed
+                            // CraftBukkit start = use LongHash and LongObjectHashMap
+                            long key = ((Long) iterator1.next()).longValue();
+                            BlockPosition blockposition1 = getRandomPosition(worldserver, LongHash.msw(key), LongHash.lsw(key));
+                            // CraftBukkit
+                            int i2 = blockposition1.getX();
+                            int j2 = blockposition1.getY();
+                            int k2 = blockposition1.getZ();
+                            IBlockData iblockdata = worldserver.getWorldBorder().isInBounds(blockposition1) ? worldserver.getTypeIfLoaded(blockposition1) : null; // Paper
+
+                            if (iblockdata != null && !iblockdata.l()) { // Paper
+                                int l2 = 0;
+                                int i3 = 0;
+
+                                while (i3 < 3) {
+                                    int j3 = i2;
+                                    int k3 = j2;
+                                    int l3 = k2;
+                                    boolean flag5 = true;
+                                    BiomeBase.BiomeMeta biomebase_biomemeta = null;
+                                    GroupDataEntity groupdataentity = null;
+                                    int i4 = MathHelper.f(Math.random() * 4.0D);
+                                    int j4 = 0;
+
+                                    while (true) {
+                                        if (j4 < i4) {
+                                            label113: {
+                                                j3 += worldserver.random.nextInt(6) - worldserver.random.nextInt(6);
+                                                k3 += worldserver.random.nextInt(1) - worldserver.random.nextInt(1);
+                                                l3 += worldserver.random.nextInt(6) - worldserver.random.nextInt(6);
+                                                blockposition_mutableblockposition.c(j3, k3, l3);
+                                                float f = (float) j3 + 0.5F;
+                                                float f1 = (float) l3 + 0.5F;
+
+                                                if (worldserver.getWorldBorder().isInBounds(blockposition_mutableblockposition) && worldserver.getChunkIfLoaded(blockposition_mutableblockposition) != null && !worldserver.isPlayerNearby((double) f, (double) k3, (double) f1, 24.0D) && blockposition.distanceSquared((double) f, (double) k3, (double) f1) >= 576.0D) { // Paper - Prevent mob spawning from loading/generating chunks
+                                                    if (biomebase_biomemeta == null) {
+                                                        biomebase_biomemeta = worldserver.a(enumcreaturetype, (BlockPosition) blockposition_mutableblockposition);
+                                                        if (biomebase_biomemeta == null) {
+                                                            break label113;
+                                                        }
+                                                    }
+
+                                                    if (worldserver.a(enumcreaturetype, biomebase_biomemeta, (BlockPosition) blockposition_mutableblockposition) && a(EntityPositionTypes.a(biomebase_biomemeta.b), worldserver, blockposition_mutableblockposition)) {
+                                                        // Paper start
+                                                        com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+                                                        Class<? extends EntityInsentient> cls = biomebase_biomemeta.b;
+                                                        org.bukkit.entity.EntityType type = EntityTypes.clsToTypeMap.get(cls);
+                                                        if (type != null) {
+                                                            event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+                                                                    MCUtil.toLocation(worldserver, blockposition_mutableblockposition),
+                                                                    type, SpawnReason.NATURAL
+                                                            );
+                                                            if (!event.callEvent()) {
+                                                                if (event.shouldAbortSpawn()) {
+                                                                    continue label120;
+                                                                }
+                                                                j1 += l2;
+                                                                ++j4;
+                                                                continue;
+                                                            }
+                                                        }
+                                                        // Paper end
+                                                        EntityInsentient entityinsentient;
+
+                                                        try {
+                                                            entityinsentient = (EntityInsentient) biomebase_biomemeta.b.getConstructor(new Class[] { World.class}).newInstance(new Object[] { worldserver});
+                                                        } catch (Exception exception) {
+                                                            exception.printStackTrace();
+                                                            ServerInternalException.reportInternalException(exception); // Paper
+                                                            return j1;
+                                                        }
+
+                                                        entityinsentient.setPositionRotation((double) f, (double) k3, (double) f1, worldserver.random.nextFloat() * 360.0F, 0.0F);
+                                                        if (entityinsentient.P() && entityinsentient.canSpawn()) {
+                                                            groupdataentity = entityinsentient.prepare(worldserver.D(new BlockPosition(entityinsentient)), groupdataentity);
+                                                            if (entityinsentient.canSpawn()) {
+                                                                // CraftBukkit start
+                                                                if (worldserver.addEntity(entityinsentient, SpawnReason.NATURAL)) {
+                                                                    ++l2;
+                                                                    moblimit--; // Spigot
+                                                                }
+                                                                // CraftBukkit end
+                                                            } else {
+                                                                entityinsentient.die();
+                                                            }
+
+                                                            // Spigot start
+                                                            if ( moblimit <= 0 ) {
+                                                                // If we're past limit, stop spawn
+                                                                // Spigot end
+                                                                continue label120;
+                                                            }
+                                                        }
+
+                                                        j1 += l2;
+                                                    }
+                                                }
+
+                                                ++j4;
+                                                continue;
+                                            }
+                                        }
+
+                                        ++i3;
+                                        break;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            return j1;
+        }
+    }
+
+    private static BlockPosition getRandomPosition(World world, int i, int j) {
+        Chunk chunk = world.getChunkAt(i, j);
+        int k = i * 16 + world.random.nextInt(16);
+        int l = j * 16 + world.random.nextInt(16);
+        int i1 = MathHelper.c(chunk.e(new BlockPosition(k, 0, l)) + 1, 16);
+        int j1 = world.random.nextInt(i1 > 0 ? i1 : chunk.g() + 16 - 1);
+
+        return new BlockPosition(k, j1, l);
+    }
+
+    public static boolean a(IBlockData iblockdata) {
+        return iblockdata.k() ? false : (iblockdata.m() ? false : (iblockdata.getMaterial().isLiquid() ? false : !BlockMinecartTrackAbstract.i(iblockdata)));
+    }
+
+    public static boolean a(EntityInsentient.EnumEntityPositionType entityinsentient_enumentitypositiontype, World world, BlockPosition blockposition) {
+        if (!world.getWorldBorder().a(blockposition)) {
+            return false;
+        } else {
+            IBlockData iblockdata = world.getType(blockposition);
+
+            if (entityinsentient_enumentitypositiontype == EntityInsentient.EnumEntityPositionType.IN_WATER) {
+                return iblockdata.getMaterial() == Material.WATER && world.getType(blockposition.down()).getMaterial() == Material.WATER && !world.getType(blockposition.up()).l();
+            } else {
+                BlockPosition blockposition1 = blockposition.down();
+
+                if (!world.getType(blockposition1).q()) {
+                    return false;
+                } else {
+                    Block block = world.getType(blockposition1).getBlock();
+                    boolean flag = block != Blocks.BEDROCK && block != Blocks.BARRIER;
+
+                    return flag && a(iblockdata) && a(world.getType(blockposition.up()));
+                }
+            }
+        }
+    }
+
+    public static void a(World world, BiomeBase biomebase, int i, int j, int k, int l, Random random) {
+        List list = biomebase.getMobs(EnumCreatureType.CREATURE);
+
+        if (!list.isEmpty()) {
+            while (random.nextFloat() < biomebase.f()) {
+                BiomeBase.BiomeMeta biomebase_biomemeta = (BiomeBase.BiomeMeta) WeightedRandom.a(world.random, list);
+                int i1 = biomebase_biomemeta.c + random.nextInt(1 + biomebase_biomemeta.d - biomebase_biomemeta.c);
+                GroupDataEntity groupdataentity = null;
+                int j1 = i + random.nextInt(k);
+                int k1 = j + random.nextInt(l);
+                int l1 = j1;
+                int i2 = k1;
+
+                for (int j2 = 0; j2 < i1; ++j2) {
+                    boolean flag = false;
+
+                    for (int k2 = 0; !flag && k2 < 4; ++k2) {
+                        BlockPosition blockposition = world.q(new BlockPosition(j1, 0, k1));
+
+                        if (a(EntityInsentient.EnumEntityPositionType.ON_GROUND, world, blockposition)) {
+                            EntityInsentient entityinsentient;
+
+                            try {
+                                entityinsentient = (EntityInsentient) biomebase_biomemeta.b.getConstructor(new Class[] { World.class}).newInstance(new Object[] { world});
+                            } catch (Exception exception) {
+                                exception.printStackTrace();
+                                ServerInternalException.reportInternalException(exception); // Paper
+                                continue;
+                            }
+
+                            entityinsentient.setPositionRotation((double) ((float) j1 + 0.5F), (double) blockposition.getY(), (double) ((float) k1 + 0.5F), random.nextFloat() * 360.0F, 0.0F);
+                            // CraftBukkit start - Added a reason for spawning this creature, moved entityinsentient.prepare(groupdataentity) up
+                            groupdataentity = entityinsentient.prepare(world.D(new BlockPosition(entityinsentient)), groupdataentity);
+                            world.addEntity(entityinsentient, SpawnReason.CHUNK_GEN);
+                            // CraftBukkit end
+                            flag = true;
+                        }
+
+                        j1 += random.nextInt(5) - random.nextInt(5);
+
+                        for (k1 += random.nextInt(5) - random.nextInt(5); j1 < i || j1 >= i + k || k1 < j || k1 >= j + k; k1 = i2 + random.nextInt(5) - random.nextInt(5)) {
+                            j1 = l1 + random.nextInt(5) - random.nextInt(5);
+                        }
+                    }
+                }
+            }
+
+        }
+    }
+}

sources/src/main/java/net/minecraft/server/TileEntityFurnace.java

@@ -0,0 +1,423 @@
+package net.minecraft.server;
+
+import java.util.Iterator;
+// CraftBukkit start
+import java.util.List;
+
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.event.inventory.FurnaceBurnEvent;
+import org.bukkit.event.inventory.FurnaceSmeltEvent;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+// CraftBukkit end
+
+public class TileEntityFurnace extends TileEntityContainer implements ITickable, IWorldInventory {
+
+    private static final int[] a = new int[] { 0};
+    private static final int[] f = new int[] { 2, 1};
+    private static final int[] g = new int[] { 1};
+    private NonNullList<ItemStack> items;
+    private int burnTime;
+    private int ticksForCurrentFuel;
+    private int cookTime;
+    private int cookTimeTotal;
+    private String m;
+
+    // CraftBukkit start - add fields and methods
+    private int lastTick = MinecraftServer.currentTick;
+    private int maxStack = MAX_STACK;
+    public List<HumanEntity> transaction = new java.util.ArrayList<HumanEntity>();
+
+    public List<ItemStack> getContents() {
+        return this.items;
+    }
+
+    public void onOpen(CraftHumanEntity who) {
+        transaction.add(who);
+    }
+
+    public void onClose(CraftHumanEntity who) {
+        transaction.remove(who);
+    }
+
+    public List<HumanEntity> getViewers() {
+        return transaction;
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+    // CraftBukkit end
+
+    public TileEntityFurnace() {
+        this.items = NonNullList.a(3, ItemStack.a);
+    }
+
+    public int getSize() {
+        return this.items.size();
+    }
+
+    public boolean x_() {
+        Iterator iterator = this.items.iterator();
+
+        ItemStack itemstack;
+
+        do {
+            if (!iterator.hasNext()) {
+                return true;
+            }
+
+            itemstack = (ItemStack) iterator.next();
+        } while (itemstack.isEmpty());
+
+        return false;
+    }
+
+    public ItemStack getItem(int i) {
+        return (ItemStack) this.items.get(i);
+    }
+
+    public ItemStack splitStack(int i, int j) {
+        return ContainerUtil.a(this.items, i, j);
+    }
+
+    public ItemStack splitWithoutUpdate(int i) {
+        return ContainerUtil.a(this.items, i);
+    }
+
+    public void setItem(int i, ItemStack itemstack) {
+        ItemStack itemstack1 = (ItemStack) this.items.get(i);
+        boolean flag = !itemstack.isEmpty() && itemstack.doMaterialsMatch(itemstack1) && ItemStack.equals(itemstack, itemstack1);
+
+        this.items.set(i, itemstack);
+        if (itemstack.getCount() > this.getMaxStackSize()) {
+            itemstack.setCount(this.getMaxStackSize());
+        }
+
+        if (i == 0 && !flag) {
+            this.cookTimeTotal = this.a(itemstack);
+            this.cookTime = 0;
+            this.update();
+        }
+
+    }
+
+    public String getName() {
+        return this.hasCustomName() ? this.m : "container.furnace";
+    }
+
+    public boolean hasCustomName() {
+        return this.m != null && !this.m.isEmpty();
+    }
+
+    public void setCustomName(String s) {
+        this.m = s;
+    }
+
+    public static void a(DataConverterManager dataconvertermanager) {
+        dataconvertermanager.a(DataConverterTypes.BLOCK_ENTITY, (DataInspector) (new DataInspectorItemList(TileEntityFurnace.class, new String[] { "Items"})));
+    }
+
+    public void load(NBTTagCompound nbttagcompound) {
+        super.load(nbttagcompound);
+        this.items = NonNullList.a(this.getSize(), ItemStack.a);
+        ContainerUtil.b(nbttagcompound, this.items);
+        this.burnTime = nbttagcompound.getShort("BurnTime");
+        this.cookTime = nbttagcompound.getShort("CookTime");
+        this.cookTimeTotal = nbttagcompound.getShort("CookTimeTotal");
+        this.ticksForCurrentFuel = fuelTime((ItemStack) this.items.get(1));
+        if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
+            this.m = nbttagcompound.getString("CustomName");
+        }
+
+    }
+
+    public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+        super.save(nbttagcompound);
+        nbttagcompound.setShort("BurnTime", (short) this.burnTime);
+        nbttagcompound.setShort("CookTime", (short) this.cookTime);
+        nbttagcompound.setShort("CookTimeTotal", (short) this.cookTimeTotal);
+        ContainerUtil.a(nbttagcompound, this.items);
+        if (this.hasCustomName()) {
+            nbttagcompound.setString("CustomName", this.m);
+        }
+
+        return nbttagcompound;
+    }
+
+    public int getMaxStackSize() {
+        return 64;
+    }
+
+    public boolean isBurning() {
+        return this.burnTime > 0;
+    }
+
+    public void e() {
+        boolean flag = (this.getBlock() == Blocks.LIT_FURNACE); // CraftBukkit - SPIGOT-844 - Check if furnace block is lit using the block instead of burn time
+        boolean flag1 = false;
+
+        // CraftBukkit start - Use wall time instead of ticks for cooking
+        int elapsedTicks = MinecraftServer.currentTick - this.lastTick;
+        this.lastTick = MinecraftServer.currentTick;
+
+        // CraftBukkit - moved from below - edited for wall time
+        if (this.isBurning() && this.canBurn()) {
+            this.cookTime += elapsedTicks;
+            if (this.cookTime >= this.cookTimeTotal) {
+                this.cookTime -= this.cookTimeTotal; // Paper
+                this.cookTimeTotal = this.a((ItemStack) this.items.get(0));
+                this.burn();
+                flag1 = true;
+            }
+        } else {
+            this.cookTime = 0;
+        }
+        // CraftBukkit end
+
+        if (this.isBurning()) {
+            this.burnTime -= elapsedTicks; // CraftBukkit - use elapsedTicks in place of constant
+        }
+
+        if (!this.world.isClientSide) {
+            ItemStack itemstack = (ItemStack) this.items.get(1);
+
+            if (!this.isBurning() && (itemstack.isEmpty() || ((ItemStack) this.items.get(0)).isEmpty())) {
+                if (!this.isBurning() && this.cookTime > 0) {
+                    this.cookTime = MathHelper.clamp(this.cookTime - 2, 0, this.cookTimeTotal);
+                }
+            } else if(this.items.get(1) != null && this.items.get(1).getItem() != Items.BUCKET) {
+                // CraftBukkit start - Handle multiple elapsed ticks
+                if (this.burnTime <= 0 && this.canBurn()) { // CraftBukkit - == to <=
+                    CraftItemStack fuel = CraftItemStack.asCraftMirror(itemstack);
+
+                    FurnaceBurnEvent furnaceBurnEvent = new FurnaceBurnEvent(this.world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), fuel, fuelTime(itemstack));
+                    this.world.getServer().getPluginManager().callEvent(furnaceBurnEvent);
+
+                    if (furnaceBurnEvent.isCancelled()) {
+                        return;
+                    }
+
+                    this.ticksForCurrentFuel = furnaceBurnEvent.getBurnTime();
+                    this.burnTime += this.ticksForCurrentFuel;
+                    if (this.burnTime > 0 && furnaceBurnEvent.isBurning()) {
+                        // CraftBukkit end
+                        flag1 = true;
+                        if (!itemstack.isEmpty()) {
+                            Item item = itemstack.getItem();
+
+                            itemstack.subtract(1);
+                            if (itemstack.isEmpty()) {
+                                Item item1 = item.q();
+
+                                this.items.set(1, item1 == null ? ItemStack.a : new ItemStack(item1));
+                            }
+                        }
+                    }
+                }
+
+                /* CraftBukkit start - Moved up
+                if (this.isBurning() && this.canBurn()) {
+                    ++this.cookTime;
+                    if (this.cookTime == this.cookTimeTotal) {
+                        this.cookTime = 0;
+                        this.cookTimeTotal = this.a((ItemStack) this.items.get(0));
+                        this.burn();
+                        flag1 = true;
+                    }
+                } else {
+                    this.cookTime = 0;
+                }
+                */
+            }
+
+            if (flag != this.isBurning()) {
+                flag1 = true;
+                BlockFurnace.a(this.isBurning(), this.world, this.position);
+                this.invalidateBlockCache(); // CraftBukkit - Invalidate tile entity's cached block type 
+            }
+        }
+
+        if (flag1) {
+            this.update();
+        }
+
+    }
+
+    public int a(ItemStack itemstack) {
+        return 200;
+    }
+
+    private boolean canBurn() {
+        if (((ItemStack) this.items.get(0)).isEmpty()) {
+            return false;
+        } else {
+            ItemStack itemstack = RecipesFurnace.getInstance().getResult((ItemStack) this.items.get(0));
+
+            if (itemstack.isEmpty()) {
+                return false;
+            } else {
+                ItemStack itemstack1 = (ItemStack) this.items.get(2);
+
+                // CraftBukkit - consider resultant count instead of current count
+                return itemstack1.isEmpty() ? true : (!itemstack1.doMaterialsMatch(itemstack) ? false : (itemstack1.getCount() + itemstack.getCount() <= this.getMaxStackSize() && itemstack1.getCount() + itemstack.getCount() < itemstack1.getMaxStackSize() ? true : itemstack1.getCount() + itemstack.getCount() <= itemstack.getMaxStackSize()));
+            }
+        }
+    }
+
+    public void burn() {
+        if (this.canBurn()) {
+            ItemStack itemstack = (ItemStack) this.items.get(0);
+            ItemStack itemstack1 = RecipesFurnace.getInstance().getResult(itemstack);
+            ItemStack itemstack2 = (ItemStack) this.items.get(2);
+
+            // CraftBukkit start - fire FurnaceSmeltEvent
+            CraftItemStack source = CraftItemStack.asCraftMirror(itemstack);
+            org.bukkit.inventory.ItemStack result = CraftItemStack.asBukkitCopy(itemstack1);
+
+            FurnaceSmeltEvent furnaceSmeltEvent = new FurnaceSmeltEvent(this.world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), source, result);
+            this.world.getServer().getPluginManager().callEvent(furnaceSmeltEvent);
+
+            if (furnaceSmeltEvent.isCancelled()) {
+                return;
+            }
+
+            result = furnaceSmeltEvent.getResult();
+            itemstack1 = CraftItemStack.asNMSCopy(result);
+
+            if (!itemstack1.isEmpty()) {
+                if (itemstack2.isEmpty()) {
+                    this.items.set(2, itemstack1.cloneItemStack());
+                } else if (CraftItemStack.asCraftMirror(itemstack2).isSimilar(result)) {
+                    itemstack2.add(itemstack1.getCount());
+                } else {
+                    return;
+                }
+            }
+
+            /*
+            if (itemstack2.isEmpty()) {
+                this.items.set(2, itemstack1.cloneItemStack());
+            } else if (itemstack2.getItem() == itemstack1.getItem()) {
+                itemstack2.add(1);
+            }
+            */
+            // CraftBukkit end
+
+            if (itemstack.getItem() == Item.getItemOf(Blocks.SPONGE) && itemstack.getData() == 1 && !((ItemStack) this.items.get(1)).isEmpty() && ((ItemStack) this.items.get(1)).getItem() == Items.BUCKET) {
+                this.items.set(1, new ItemStack(Items.WATER_BUCKET));
+            }
+
+            itemstack.subtract(1);
+        }
+    }
+
+    public static int fuelTime(ItemStack itemstack) {
+        if (itemstack.isEmpty()) {
+            return 0;
+        } else {
+            Item item = itemstack.getItem();
+
+            return item == Item.getItemOf(Blocks.WOODEN_SLAB) ? 150 : (item == Item.getItemOf(Blocks.WOOL) ? 100 : (item == Item.getItemOf(Blocks.CARPET) ? 67 : (item == Item.getItemOf(Blocks.LADDER) ? 300 : (item == Item.getItemOf(Blocks.WOODEN_BUTTON) ? 100 : (Block.asBlock(item).getBlockData().getMaterial() == Material.WOOD ? 300 : (item == Item.getItemOf(Blocks.COAL_BLOCK) ? 16000 : (item instanceof ItemTool && "WOOD".equals(((ItemTool) item).h()) ? 200 : (item instanceof ItemSword && "WOOD".equals(((ItemSword) item).h()) ? 200 : (item instanceof ItemHoe && "WOOD".equals(((ItemHoe) item).g()) ? 200 : (item == Items.STICK ? 100 : (item != Items.BOW && item != Items.FISHING_ROD ? (item == Items.SIGN ? 200 : (item == Items.COAL ? 1600 : (item == Items.LAVA_BUCKET ? 20000 : (item != Item.getItemOf(Blocks.SAPLING) && item != Items.BOWL ? (item == Items.BLAZE_ROD ? 2400 : (item instanceof ItemDoor && item != Items.IRON_DOOR ? 200 : (item instanceof ItemBoat ? 400 : 0))) : 100)))) : 300)))))))))));
+        }
+    }
+
+    public static boolean isFuel(ItemStack itemstack) {
+        return fuelTime(itemstack) > 0;
+    }
+
+    public boolean a(EntityHuman entityhuman) {
+        return this.world.getTileEntity(this.position) != this ? false : entityhuman.d((double) this.position.getX() + 0.5D, (double) this.position.getY() + 0.5D, (double) this.position.getZ() + 0.5D) <= 64.0D;
+    }
+
+    public void startOpen(EntityHuman entityhuman) {}
+
+    public void closeContainer(EntityHuman entityhuman) {}
+
+    public boolean b(int i, ItemStack itemstack) {
+        if (i == 2) {
+            return false;
+        } else if (i != 1) {
+            return true;
+        } else {
+            ItemStack itemstack1 = (ItemStack) this.items.get(1);
+
+            return isFuel(itemstack) || SlotFurnaceFuel.d_(itemstack) && itemstack1.getItem() != Items.BUCKET;
+        }
+    }
+
+    public int[] getSlotsForFace(EnumDirection enumdirection) {
+        return enumdirection == EnumDirection.DOWN ? TileEntityFurnace.f : (enumdirection == EnumDirection.UP ? TileEntityFurnace.a : TileEntityFurnace.g);
+    }
+
+    public boolean canPlaceItemThroughFace(int i, ItemStack itemstack, EnumDirection enumdirection) {
+        return this.b(i, itemstack);
+    }
+
+    public boolean canTakeItemThroughFace(int i, ItemStack itemstack, EnumDirection enumdirection) {
+        if (enumdirection == EnumDirection.DOWN && i == 1) {
+            Item item = itemstack.getItem();
+
+            if (item != Items.WATER_BUCKET && item != Items.BUCKET) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public String getContainerName() {
+        return "minecraft:furnace";
+    }
+
+    public Container createContainer(PlayerInventory playerinventory, EntityHuman entityhuman) {
+        return new ContainerFurnace(playerinventory, this);
+    }
+
+    public int getProperty(int i) {
+        switch (i) {
+        case 0:
+            return this.burnTime;
+
+        case 1:
+            return this.ticksForCurrentFuel;
+
+        case 2:
+            return this.cookTime;
+
+        case 3:
+            return this.cookTimeTotal;
+
+        default:
+            return 0;
+        }
+    }
+
+    public void setProperty(int i, int j) {
+        switch (i) {
+        case 0:
+            this.burnTime = j;
+            break;
+
+        case 1:
+            this.ticksForCurrentFuel = j;
+            break;
+
+        case 2:
+            this.cookTime = j;
+            break;
+
+        case 3:
+            this.cookTimeTotal = j;
+        }
+
+    }
+
+    public int h() {
+        return 4;
+    }
+
+    public void clear() {
+        this.items.clear();
+    }
+}

sources/src/main/java/net/minecraft/server/TileEntityHopper.java

@@ -0,0 +1,784 @@
+package net.minecraft.server;
+
+import java.util.Iterator;
+import java.util.List;
+import javax.annotation.Nullable;
+
+// CraftBukkit start
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.event.inventory.InventoryMoveItemEvent;
+import org.bukkit.event.inventory.InventoryPickupItemEvent;
+import org.bukkit.inventory.Inventory;
+// CraftBukkit end
+
+public class TileEntityHopper extends TileEntityLootable implements IHopper, ITickable {
+
+    private NonNullList<ItemStack> items;
+    private int f;
+    private long g;
+
+    // CraftBukkit start - add fields and methods
+    public List<HumanEntity> transaction = new java.util.ArrayList<HumanEntity>();
+    private int maxStack = MAX_STACK;
+
+    public List<ItemStack> getContents() {
+        return this.items;
+    }
+
+    public void onOpen(CraftHumanEntity who) {
+        transaction.add(who);
+    }
+
+    public void onClose(CraftHumanEntity who) {
+        transaction.remove(who);
+    }
+
+    public List<HumanEntity> getViewers() {
+        return transaction;
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+    // CraftBukkit end
+
+    public TileEntityHopper() {
+        this.items = NonNullList.a(5, ItemStack.a);
+        this.f = -1;
+    }
+
+    public static void a(DataConverterManager dataconvertermanager) {
+        dataconvertermanager.a(DataConverterTypes.BLOCK_ENTITY, (DataInspector) (new DataInspectorItemList(TileEntityHopper.class, new String[] { "Items"})));
+    }
+
+    public void load(NBTTagCompound nbttagcompound) {
+        super.load(nbttagcompound);
+        this.items = NonNullList.a(this.getSize(), ItemStack.a);
+        if (!this.c(nbttagcompound)) {
+            ContainerUtil.b(nbttagcompound, this.items);
+        }
+
+        if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
+            this.o = nbttagcompound.getString("CustomName");
+        }
+
+        this.f = nbttagcompound.getInt("TransferCooldown");
+    }
+
+    public NBTTagCompound save(NBTTagCompound nbttagcompound) {
+        super.save(nbttagcompound);
+        if (!this.d(nbttagcompound)) {
+            ContainerUtil.a(nbttagcompound, this.items);
+        }
+
+        nbttagcompound.setInt("TransferCooldown", this.f);
+        if (this.hasCustomName()) {
+            nbttagcompound.setString("CustomName", this.o);
+        }
+
+        return nbttagcompound;
+    }
+
+    public int getSize() {
+        return this.items.size();
+    }
+
+    public ItemStack splitStack(int i, int j) {
+        this.d((EntityHuman) null);
+        ItemStack itemstack = ContainerUtil.a(this.q(), i, j);
+
+        return itemstack;
+    }
+
+    public void setItem(int i, ItemStack itemstack) {
+        this.d((EntityHuman) null);
+        this.q().set(i, itemstack);
+        if (itemstack.getCount() > this.getMaxStackSize()) {
+            itemstack.setCount(this.getMaxStackSize());
+        }
+
+    }
+
+    public String getName() {
+        return this.hasCustomName() ? this.o : "container.hopper";
+    }
+
+    public int getMaxStackSize() {
+        return maxStack; // CraftBukkit
+    }
+
+    public void e() {
+        if (this.world != null && !this.world.isClientSide) {
+            --this.f;
+            this.g = this.world.getTime();
+            if (!this.J()) {
+                this.setCooldown(0);
+                // Spigot start
+                if (!this.o() && this.world.spigotConfig.hopperCheck > 1) {
+                    this.setCooldown(this.world.spigotConfig.hopperCheck);
+                }
+                // Spigot end
+            }
+
+        }
+    }
+
+    private boolean o() {
+        mayAcceptItems = false; // Paper - at the beginning of a tick, assume we can't accept items
+        if (this.world != null && !this.world.isClientSide) {
+            if (!this.J() && BlockHopper.f(this.v())) {
+                boolean flag = false;
+
+                if (!this.p()) {
+                    flag = this.s();
+                }
+
+                if (!this.r()) {
+                    mayAcceptItems = true; // Paper - flag this hopper to be able to accept items
+                    flag = a((IHopper) this) || flag;
+                }
+
+                if (flag) {
+                    this.setCooldown(world.spigotConfig.hopperTransfer); // Spigot
+                    this.update();
+                    return true;
+                }
+            }
+            return false;
+        } else {
+            return false;
+        }
+    }
+
+    // Paper start
+    private boolean mayAcceptItems = false;
+
+    public boolean canAcceptItems() {
+        return mayAcceptItems;
+    }
+    // Paper end
+
+    private boolean p() {
+        Iterator iterator = this.items.iterator();
+
+        ItemStack itemstack;
+
+        do {
+            if (!iterator.hasNext()) {
+                return true;
+            }
+
+            itemstack = (ItemStack) iterator.next();
+        } while (itemstack.isEmpty());
+
+        return false;
+    }
+
+    public boolean x_() {
+        return this.p();
+    }
+
+    private boolean r() {
+        Iterator iterator = this.items.iterator();
+
+        ItemStack itemstack;
+
+        do {
+            if (!iterator.hasNext()) {
+                return true;
+            }
+
+            itemstack = (ItemStack) iterator.next();
+        } while (!itemstack.isEmpty() && itemstack.getCount() == itemstack.getMaxStackSize());
+
+        return false;
+    }
+
+    // Paper start - Optimize Hoppers
+    private static boolean skipPullModeEventFire = false;
+    private static boolean skipPushModeEventFire = false;
+    static boolean skipHopperEvents = false;
+
+    private boolean hopperPush(IInventory iinventory, EnumDirection enumdirection) {
+        skipPushModeEventFire = skipHopperEvents;
+        boolean foundItem = false;
+        for (int i = 0; i < this.getSize(); ++i) {
+            if (!this.getItem(i).isEmpty()) {
+                foundItem = true;
+                ItemStack origItemStack = this.getItem(i);
+                ItemStack itemstack = origItemStack;
+
+                final int origCount = origItemStack.getCount();
+                final int moved = Math.min(world.spigotConfig.hopperAmount, origCount);
+                origItemStack.setCount(moved);
+
+                // We only need to fire the event once to give protection plugins a chance to cancel this event
+                // Because nothing uses getItem, every event call should end up the same result.
+                if (!skipPushModeEventFire) {
+                    itemstack = callPushMoveEvent(iinventory, itemstack);
+                    if (itemstack == null) { // cancelled
+                        origItemStack.setCount(origCount);
+                        return false;
+                    }
+                }
+                final ItemStack itemstack2 = addItem(this, iinventory, itemstack, enumdirection);
+                final int remaining = itemstack2.getCount();
+                if (remaining != moved) {
+                    origItemStack = origItemStack.cloneItemStack();
+                    origItemStack.setCount(origCount - moved + remaining);
+                    this.setItem(i, origItemStack);
+                    iinventory.update();
+                    return true;
+                }
+                origItemStack.setCount(origCount);
+            }
+        }
+        if (foundItem && world.paperConfig.cooldownHopperWhenFull) { // Inventory was full - cooldown
+            this.setCooldown(world.spigotConfig.hopperTransfer);
+        }
+        return false;
+    }
+
+    private static boolean hopperPull(IHopper ihopper, IInventory iinventory, int i) {
+        ItemStack origItemStack = iinventory.getItem(i);
+        ItemStack itemstack = origItemStack;
+        final int origCount = origItemStack.getCount();
+        final World world = ihopper.getWorld();
+        final int moved = Math.min(world.spigotConfig.hopperAmount, origCount);
+        itemstack.setCount(moved);
+
+        if (!skipPullModeEventFire) {
+            itemstack = callPullMoveEvent(ihopper, iinventory, itemstack);
+            if (itemstack == null) { // cancelled
+                origItemStack.setCount(origCount);
+                // Drastically improve performance by returning true.
+                // No plugin could of relied on the behavior of false as the other call
+                // site for IMIE did not exhibit the same behavior
+                return true;
+            }
+        }
+
+        final ItemStack itemstack2 = addItem(iinventory, ihopper, itemstack, null);
+        final int remaining = itemstack2.getCount();
+        if (remaining != moved) {
+            origItemStack = origItemStack.cloneItemStack();
+            origItemStack.setCount(origCount - moved + remaining);
+            IGNORE_TILE_UPDATES = true;
+            iinventory.setItem(i, origItemStack);
+            IGNORE_TILE_UPDATES = false;
+            iinventory.update();
+            return true;
+        }
+        origItemStack.setCount(origCount);
+
+        if (world.paperConfig.cooldownHopperWhenFull) {
+            cooldownHopper(ihopper);
+        }
+
+        return false;
+    }
+
+    private ItemStack callPushMoveEvent(IInventory iinventory, ItemStack itemstack) {
+        Inventory destinationInventory = getInventory(iinventory);
+        InventoryMoveItemEvent event = new InventoryMoveItemEvent(this.getOwner(false).getInventory(),
+                CraftItemStack.asCraftMirror(itemstack), destinationInventory, true);
+        boolean result = event.callEvent();
+        if (!event.calledGetItem && !event.calledSetItem) {
+            skipPushModeEventFire = true;
+        }
+        if (!result) {
+            cooldownHopper(this);
+            return null;
+        }
+
+        if (event.calledSetItem) {
+            return CraftItemStack.asNMSCopy(event.getItem());
+        } else {
+            return itemstack;
+        }
+    }
+
+    private static ItemStack callPullMoveEvent(IHopper hopper, IInventory iinventory, ItemStack itemstack) {
+        Inventory sourceInventory = getInventory(iinventory);
+        Inventory destination = getInventory(hopper);
+
+        InventoryMoveItemEvent event = new InventoryMoveItemEvent(sourceInventory,
+                // Mirror is safe as we no plugins ever use this item
+                CraftItemStack.asCraftMirror(itemstack), destination, false);
+        boolean result = event.callEvent();
+        if (!event.calledGetItem && !event.calledSetItem) {
+            skipPullModeEventFire = true;
+        }
+        if (!result) {
+            cooldownHopper(hopper);
+            return null;
+        }
+
+        if (event.calledSetItem) {
+            return CraftItemStack.asNMSCopy(event.getItem());
+        } else {
+            return itemstack;
+        }
+    }
+
+    private static Inventory getInventory(IInventory iinventory) {
+        Inventory sourceInventory;// Have to special case large chests as they work oddly
+        if (iinventory instanceof InventoryLargeChest) {
+            sourceInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((InventoryLargeChest) iinventory);
+        } else if (iinventory instanceof TileEntity) {
+            sourceInventory = ((TileEntity) iinventory).getOwner(false).getInventory();
+        } else {
+            sourceInventory = iinventory.getOwner().getInventory();
+        }
+        return sourceInventory;
+    }
+
+    private static void cooldownHopper(IHopper hopper) {
+        if (hopper instanceof TileEntityHopper) {
+            ((TileEntityHopper) hopper).setCooldown(hopper.getWorld().spigotConfig.hopperTransfer);
+        } else if (hopper instanceof EntityMinecartHopper) {
+            ((EntityMinecartHopper) hopper).setCooldown(hopper.getWorld().spigotConfig.hopperTransfer / 2);
+        }
+    }
+
+    // Paper end
+    private boolean s() {
+        IInventory iinventory = this.I();
+
+        if (iinventory == null) {
+            return false;
+        } else {
+            EnumDirection enumdirection = BlockHopper.b(this.v()).opposite();
+
+            if (this.a(iinventory, enumdirection)) {
+                return false;
+            } else {
+                return hopperPush(iinventory, enumdirection); /* // Paper - disable rest
+                for (int i = 0; i < this.getSize(); ++i) {
+                    if (!this.getItem(i).isEmpty()) {
+                        ItemStack itemstack = this.getItem(i).cloneItemStack();
+                        // ItemStack itemstack1 = addItem(this, iinventory, this.splitStack(i, 1), enumdirection);
+
+                        // CraftBukkit start - Call event when pushing items into other inventories
+                        CraftItemStack oitemstack = CraftItemStack.asCraftMirror(this.splitStack(i, world.spigotConfig.hopperAmount)); // Spigot
+
+                        Inventory destinationInventory;
+                        // Have to special case large chests as they work oddly
+                        if (iinventory instanceof InventoryLargeChest) {
+                            destinationInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((InventoryLargeChest) iinventory);
+                        } else {
+                            destinationInventory = iinventory.getOwner().getInventory();
+                        }
+
+                        InventoryMoveItemEvent event = new InventoryMoveItemEvent(this.getOwner().getInventory(), oitemstack.clone(), destinationInventory, true);
+                        this.getWorld().getServer().getPluginManager().callEvent(event);
+                        if (event.isCancelled()) {
+                            this.setItem(i, itemstack);
+                            this.setCooldown(world.spigotConfig.hopperTransfer); // Spigot
+                            return false;
+                        }
+                        int origCount = event.getItem().getAmount(); // Spigot
+                        ItemStack itemstack1 = addItem(this, iinventory, CraftItemStack.asNMSCopy(event.getItem()), enumdirection);
+
+                        if (itemstack1.isEmpty()) {
+                            if (event.getItem().equals(oitemstack)) {
+                                iinventory.update();
+                            } else {
+                                this.setItem(i, itemstack);
+                            }
+                            // CraftBukkit end
+                            return true;
+                        }
+
+                        itemstack.subtract(origCount - itemstack1.getCount()); // Spigot
+                        this.setItem(i, itemstack);
+                    }
+                }
+
+                return false;*/ // Paper - end commenting out replaced block for Hopper Optimizations
+            }
+        }
+    }
+
+    private boolean a(IInventory iinventory, EnumDirection enumdirection) {
+        if (iinventory instanceof IWorldInventory) {
+            IWorldInventory iworldinventory = (IWorldInventory) iinventory;
+            int[] aint = iworldinventory.getSlotsForFace(enumdirection);
+            int[] aint1 = aint;
+            int i = aint.length;
+
+            for (int j = 0; j < i; ++j) {
+                int k = aint1[j];
+                ItemStack itemstack = iworldinventory.getItem(k);
+
+                if (itemstack.isEmpty() || itemstack.getCount() != itemstack.getMaxStackSize()) {
+                    return false;
+                }
+            }
+        } else {
+            int l = iinventory.getSize();
+
+            for (int i1 = 0; i1 < l; ++i1) {
+                ItemStack itemstack1 = iinventory.getItem(i1);
+
+                if (itemstack1.isEmpty() || itemstack1.getCount() != itemstack1.getMaxStackSize()) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    private static boolean b(IInventory iinventory, EnumDirection enumdirection) {
+        if (iinventory instanceof IWorldInventory) {
+            IWorldInventory iworldinventory = (IWorldInventory) iinventory;
+            int[] aint = iworldinventory.getSlotsForFace(enumdirection);
+            int[] aint1 = aint;
+            int i = aint.length;
+
+            for (int j = 0; j < i; ++j) {
+                int k = aint1[j];
+
+                if (!iworldinventory.getItem(k).isEmpty()) {
+                    return false;
+                }
+            }
+        } else {
+            int l = iinventory.getSize();
+
+            for (int i1 = 0; i1 < l; ++i1) {
+                if (!iinventory.getItem(i1).isEmpty()) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    // Paper start - split methods, and only do entity lookup if in pull mode
+    public static boolean a(IHopper ihopper) {
+        IInventory iinventory = getInventory(ihopper, !(ihopper instanceof TileEntityHopper) || !ihopper.getWorld().paperConfig.isHopperPushBased);
+
+        return acceptItem(ihopper, iinventory);
+    }
+
+    public static boolean acceptItem(IHopper ihopper, IInventory iinventory) {
+        // Paper end
+
+        if (iinventory != null) {
+            EnumDirection enumdirection = EnumDirection.DOWN;
+
+            if (b(iinventory, enumdirection)) {
+                return false;
+            }
+            skipPullModeEventFire = skipHopperEvents; // Paper
+
+            if (iinventory instanceof IWorldInventory) {
+                IWorldInventory iworldinventory = (IWorldInventory) iinventory;
+                int[] aint = iworldinventory.getSlotsForFace(enumdirection);
+                int[] aint1 = aint;
+                int i = aint.length;
+
+                for (int j = 0; j < i; ++j) {
+                    int k = aint1[j];
+
+                    if (a(ihopper, iinventory, k, enumdirection)) {
+                        return true;
+                    }
+                }
+            } else {
+                int l = iinventory.getSize();
+
+                for (int i1 = 0; i1 < l; ++i1) {
+                    if (a(ihopper, iinventory, i1, enumdirection)) {
+                        return true;
+                    }
+                }
+            }
+        } else if (!ihopper.getWorld().paperConfig.isHopperPushBased || !(ihopper instanceof TileEntityHopper)) { // Paper - only search for entities in 'pull mode'
+            Iterator iterator = a(ihopper.getWorld(), ihopper.E(), ihopper.F(), ihopper.G()).iterator(); // Change getHopperLookupBoundingBox() if this ever changes
+
+            while (iterator.hasNext()) {
+                EntityItem entityitem = (EntityItem) iterator.next();
+
+                if (a((IInventory) null, ihopper, entityitem)) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    private static boolean a(IHopper ihopper, IInventory iinventory, int i, EnumDirection enumdirection) {
+        ItemStack itemstack = iinventory.getItem(i);
+
+        if (!itemstack.isEmpty() && b(iinventory, itemstack, i, enumdirection)) {
+            return hopperPull(ihopper, iinventory, i); /* // Paper - disable rest
+            ItemStack itemstack1 = itemstack.cloneItemStack();
+            // ItemStack itemstack2 = addItem(iinventory, ihopper, iinventory.splitStack(i, 1), (EnumDirection) null);
+            // CraftBukkit start - Call event on collection of items from inventories into the hopper
+            CraftItemStack oitemstack = CraftItemStack.asCraftMirror(iinventory.splitStack(i, ihopper.getWorld().spigotConfig.hopperAmount)); // Spigot
+
+            Inventory sourceInventory;
+            // Have to special case large chests as they work oddly
+            if (iinventory instanceof InventoryLargeChest) {
+                sourceInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((InventoryLargeChest) iinventory);
+            } else {
+                sourceInventory = iinventory.getOwner().getInventory();
+            }
+
+            InventoryMoveItemEvent event = new InventoryMoveItemEvent(sourceInventory, oitemstack.clone(), ihopper.getOwner().getInventory(), false);
+
+            ihopper.getWorld().getServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                iinventory.setItem(i, itemstack1);
+
+                if (ihopper instanceof TileEntityHopper) {
+                    ((TileEntityHopper) ihopper).setCooldown(ihopper.getWorld().spigotConfig.hopperTransfer); // Spigot
+                } else if (ihopper instanceof EntityMinecartHopper) {
+                    ((EntityMinecartHopper) ihopper).setCooldown(ihopper.getWorld().spigotConfig.hopperTransfer / 2); // Spigot
+                }
+                return false;
+            }
+            int origCount = event.getItem().getAmount(); // Spigot
+            ItemStack itemstack2 = addItem(iinventory, ihopper, CraftItemStack.asNMSCopy(event.getItem()), null);
+
+            if (itemstack2.isEmpty()) {
+                if (event.getItem().equals(oitemstack)) {
+                    iinventory.update();
+                } else {
+                    iinventory.setItem(i, itemstack1);
+                }
+                // CraftBukkit end
+                return true;
+            }
+
+            itemstack1.subtract(origCount - itemstack2.getCount()); // Spigot
+            iinventory.setItem(i, itemstack1);*/ // Paper - end commenting out replaced block for Hopper Optimizations
+        }
+
+        return false;
+    }
+
+    public static boolean putDropInInventory(IInventory iinventory, IInventory iinventory1, EntityItem entityitem) { return a(iinventory, iinventory1, entityitem); } // Paper - OBFHELPER
+    public static boolean a(IInventory iinventory, IInventory iinventory1, EntityItem entityitem) {
+        boolean flag = false;
+
+        if (entityitem == null) {
+            return false;
+        } else {
+            // CraftBukkit start
+            InventoryPickupItemEvent event = new InventoryPickupItemEvent(getInventory(iinventory1), (org.bukkit.entity.Item) entityitem.getBukkitEntity()); // Paper - avoid snapshot creation
+            entityitem.world.getServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                return false;
+            }
+            // CraftBukkit end
+            ItemStack itemstack = entityitem.getItemStack().cloneItemStack();
+            ItemStack itemstack1 = addItem(iinventory, iinventory1, itemstack, (EnumDirection) null);
+
+            if (itemstack1.isEmpty()) {
+                flag = true;
+                entityitem.die();
+            } else {
+                entityitem.setItemStack(itemstack1);
+            }
+
+            return flag;
+        }
+    }
+
+    public static ItemStack addItem(IInventory iinventory, IInventory iinventory1, ItemStack itemstack, @Nullable EnumDirection enumdirection) {
+        if (iinventory1 instanceof IWorldInventory && enumdirection != null) {
+            IWorldInventory iworldinventory = (IWorldInventory) iinventory1;
+            int[] aint = iworldinventory.getSlotsForFace(enumdirection);
+
+            for (int i = 0; i < aint.length && !itemstack.isEmpty(); ++i) {
+                itemstack = a(iinventory, iinventory1, itemstack, aint[i], enumdirection);
+            }
+        } else {
+            int j = iinventory1.getSize();
+
+            for (int k = 0; k < j && !itemstack.isEmpty(); ++k) {
+                itemstack = a(iinventory, iinventory1, itemstack, k, enumdirection);
+            }
+        }
+
+        return itemstack;
+    }
+
+    private static boolean a(IInventory iinventory, ItemStack itemstack, int i, EnumDirection enumdirection) {
+        return !iinventory.b(i, itemstack) ? false : !(iinventory instanceof IWorldInventory) || ((IWorldInventory) iinventory).canPlaceItemThroughFace(i, itemstack, enumdirection);
+    }
+
+    private static boolean b(IInventory iinventory, ItemStack itemstack, int i, EnumDirection enumdirection) {
+        return !(iinventory instanceof IWorldInventory) || ((IWorldInventory) iinventory).canTakeItemThroughFace(i, itemstack, enumdirection);
+    }
+
+    private static ItemStack a(IInventory iinventory, IInventory iinventory1, ItemStack itemstack, int i, EnumDirection enumdirection) {
+        ItemStack itemstack1 = iinventory1.getItem(i);
+
+        if (a(iinventory1, itemstack, i, enumdirection)) {
+            boolean flag = false;
+            boolean flag1 = iinventory1.x_();
+
+            if (itemstack1.isEmpty()) {
+                IGNORE_TILE_UPDATES = true; // Paper
+                iinventory1.setItem(i, itemstack);
+                IGNORE_TILE_UPDATES = false; // Paper
+                itemstack = ItemStack.a;
+                flag = true;
+            } else if (a(itemstack1, itemstack)) {
+                int j = itemstack.getMaxStackSize() - itemstack1.getCount();
+                int k = Math.min(itemstack.getCount(), j);
+
+                itemstack.subtract(k);
+                itemstack1.add(k);
+                flag = k > 0;
+            }
+
+            if (flag) {
+                if (flag1 && iinventory1 instanceof TileEntityHopper) {
+                    TileEntityHopper tileentityhopper = (TileEntityHopper) iinventory1;
+
+                    if (!tileentityhopper.K()) {
+                        byte b0 = 0;
+
+                        if (iinventory != null && iinventory instanceof TileEntityHopper) {
+                            TileEntityHopper tileentityhopper1 = (TileEntityHopper) iinventory;
+
+                            if (tileentityhopper.g >= tileentityhopper1.g) {
+                                b0 = 1;
+                            }
+                        }
+
+                        tileentityhopper.setCooldown(tileentityhopper.world.spigotConfig.hopperTransfer - b0); // Spigot
+                    }
+                }
+
+                iinventory1.update();
+            }
+        }
+
+        return itemstack;
+    }
+
+    private IInventory I() {
+        EnumDirection enumdirection = BlockHopper.b(this.v());
+
+        // Paper start - don't search for entities in push mode
+        World world = getWorld();
+        return getInventory(world, this.E() + (double) enumdirection.getAdjacentX(), this.F() + (double) enumdirection.getAdjacentY(), this.G() + (double) enumdirection.getAdjacentZ(), !world.paperConfig.isHopperPushBased);
+        // Paper end
+    }
+
+    // Paper start - add option to search for entities
+    public static IInventory b(IHopper hopper) {
+        return getInventory(hopper, true);
+    }
+
+    public static IInventory getInventory(IHopper ihopper, boolean searchForEntities) {
+        return getInventory(ihopper.getWorld(), ihopper.E(), ihopper.F() + 1.0D, ihopper.G(), searchForEntities);
+        // Paper end
+    }
+
+    public static List<EntityItem> a(World world, double d0, double d1, double d2) {
+        return world.a(EntityItem.class, new AxisAlignedBB(d0 - 0.5D, d1, d2 - 0.5D, d0 + 0.5D, d1 + 1.5D, d2 + 0.5D), IEntitySelector.a); // Change getHopperLookupBoundingBox(double, double, double) if the bounding box calculation is ever changed
+    }
+
+    // Paper start
+    public AxisAlignedBB getHopperLookupBoundingBox() {
+        return getHopperLookupBoundingBox(this.getX(), this.getY(), this.getZ());
+    }
+
+    private static AxisAlignedBB getHopperLookupBoundingBox(double d0, double d1, double d2) {
+        // Change this if a(World, double, double, double) above ever changes
+        return new AxisAlignedBB(d0 - 0.5D, d1, d2 - 0.5D, d0 + 0.5D, d1 + 1.5D, d2 + 0.5D);
+    }
+    // Paper end
+
+    // Paper start - add option to searchForEntities
+    public static IInventory b(World world, double d0, double d1, double d2) {
+        return getInventory(world, d0, d1, d2, true);
+    }
+
+    public static IInventory getInventory(World world, double d0, double d1, double d2, boolean searchForEntities) {
+        // Paper end
+        Object object = null;
+        int i = MathHelper.floor(d0);
+        int j = MathHelper.floor(d1);
+        int k = MathHelper.floor(d2);
+        BlockPosition blockposition = new BlockPosition(i, j, k);
+        if ( !world.isLoaded( blockposition ) ) return null; // Spigot
+        Block block = world.getType(blockposition).getBlock();
+
+        if (block.isTileEntity()) {
+            TileEntity tileentity = world.getTileEntity(blockposition);
+
+            if (tileentity instanceof IInventory) {
+                object = (IInventory) tileentity;
+                if (object instanceof TileEntityChest && block instanceof BlockChest) {
+                    object = ((BlockChest) block).a(world, blockposition, true);
+                }
+            }
+        }
+		
+		net.minecraft.server.Chunk chunk = world.getChunkAtWorldCoords(blockposition);
+
+        if (object == null && searchForEntities && !org.bukkit.craftbukkit.util.CraftMagicNumbers.getMaterial(block).isOccluding() && chunk.getItemCount(blockposition) > 0) { // Paper - only if searchForEntities
+            List list = world.getEntities((Entity) null, new AxisAlignedBB(d0 - 0.5D, d1 - 0.5D, d2 - 0.5D, d0 + 0.5D, d1 + 0.5D, d2 + 0.5D), IEntitySelector.c);
+
+            if (!list.isEmpty()) {
+                object = (IInventory) list.get(world.random.nextInt(list.size()));
+            }
+        }
+
+        return (IInventory) object;
+    }
+
+    private static boolean a(ItemStack itemstack, ItemStack itemstack1) {
+        return itemstack.getItem() != itemstack1.getItem() ? false : (itemstack.getData() != itemstack1.getData() ? false : (itemstack.getCount() > itemstack.getMaxStackSize() ? false : ItemStack.equals(itemstack, itemstack1)));
+    }
+
+    public double E() {
+        return (double) this.position.getX() + 0.5D;
+    }
+
+    public double F() {
+        return (double) this.position.getY() + 0.5D;
+    }
+
+    public double G() {
+        return (double) this.position.getZ() + 0.5D;
+    }
+
+    private void setCooldown(int i) {
+        this.f = i;
+    }
+
+    private boolean J() {
+        return this.f > 0;
+    }
+
+    private boolean K() {
+        return this.f > 8;
+    }
+
+    public String getContainerName() {
+        return "minecraft:hopper";
+    }
+
+    public Container createContainer(PlayerInventory playerinventory, EntityHuman entityhuman) {
+        this.d(entityhuman);
+        return new ContainerHopper(playerinventory, this, entityhuman);
+    }
+
+    protected NonNullList<ItemStack> q() {
+        return this.items;
+    }
+}

sources/src/main/java/net/minecraft/server/World.java

@@ -587,7 +587,9 @@ public abstract class World implements IBlockAccess {
 
     public void a(BlockPosition blockposition, final Block block, BlockPosition blockposition1) {
         if (!this.isClientSide) {
-            IBlockData iblockdata = this.getType(blockposition);
+            //IBlockData iblockdata = this.getType(blockposition);
+            IBlockData iblockdata = this.getTypeIfLoaded(blockposition); // NeonPaper Don't load chunks for physics
+            if (iblockdata == null) return; // NeonPaper Don't load chunks for physics
 
             try {
                 // CraftBukkit start
@@ -697,7 +699,7 @@ public abstract class World implements IBlockAccess {
             if (blockposition.getY() >= 256) {
                 blockposition = new BlockPosition(blockposition.getX(), 255, blockposition.getZ());
             }
-
+            if (!this.isLoaded(blockposition)) return 0; // Paper
             return this.getChunkAtWorldCoords(blockposition).a(blockposition, 0);
         }
     }
@@ -1891,7 +1893,7 @@ public abstract class World implements IBlockAccess {
         for (int i = 0; i < list.size(); ++i) {
             Entity entity1 = (Entity) list.get(i);
 
-            if (!entity1.dead && entity1.i && entity1 != entity && (entity == null || entity1.x(entity))) {
+            if (!entity1.dead && entity1.i && entity1 != entity && (entity == null || !entity1.x(entity))) { // Reaper - Fix MC-103516
                 return false;
             }
         }

sources/src/main/java/net/minecraft/server/WorldManager.java

@@ -0,0 +1,101 @@
+package net.minecraft.server;
+
+import java.util.Iterator;
+import javax.annotation.Nullable;
+
+public class WorldManager implements IWorldAccess {
+
+    private final MinecraftServer a;
+    private final WorldServer world;
+
+    public WorldManager(MinecraftServer minecraftserver, WorldServer worldserver) {
+        this.a = minecraftserver;
+        this.world = worldserver;
+    }
+
+    public void a(int i, boolean flag, double d0, double d1, double d2, double d3, double d4, double d5, int... aint) {}
+
+    public void a(int i, boolean flag, boolean flag1, double d0, double d1, double d2, double d3, double d4, double d5, int... aint) {}
+
+    public void a(Entity entity) {
+        this.world.getTracker().track(entity);
+        if (entity instanceof EntityPlayer) {
+            this.world.worldProvider.a((EntityPlayer) entity);
+        }
+
+    }
+
+    public void b(Entity entity) {
+        this.world.getTracker().untrackEntity(entity);
+        this.world.getScoreboard().a(entity);
+        if (entity instanceof EntityPlayer) {
+            this.world.worldProvider.b((EntityPlayer) entity);
+        }
+
+    }
+
+    public void a(@Nullable EntityHuman entityhuman, SoundEffect soundeffect, SoundCategory soundcategory, double d0, double d1, double d2, float f, float f1) {
+        // CraftBukkit - this.world.dimension, // Paper - this.world.dimension -> this.world
+        this.a.getPlayerList().sendPacketNearby(entityhuman, d0, d1, d2, f > 1.0F ? (double) (16.0F * f) : 16.0D, this.world, new PacketPlayOutNamedSoundEffect(soundeffect, soundcategory, d0, d1, d2, f, f1));
+    }
+
+    public void a(int i, int j, int k, int l, int i1, int j1) {}
+
+    public void a(World world, BlockPosition blockposition, IBlockData iblockdata, IBlockData iblockdata1, int i) {
+        this.world.getPlayerChunkMap().flagDirty(blockposition);
+    }
+
+    public void a(BlockPosition blockposition) {}
+
+    public void a(SoundEffect soundeffect, BlockPosition blockposition) {}
+
+    public void a(EntityHuman entityhuman, int i, BlockPosition blockposition, int j) {
+        // CraftBukkit - this.world.dimension
+        this.a.getPlayerList().sendPacketNearby(entityhuman, (double) blockposition.getX(), (double) blockposition.getY(), (double) blockposition.getZ(), 64.0D, this.world, new PacketPlayOutWorldEvent(i, blockposition, j, false));
+    }
+
+    public void a(int i, BlockPosition blockposition, int j) {
+        this.a.getPlayerList().sendAll(new PacketPlayOutWorldEvent(i, blockposition, j, true));
+    }
+
+    public void b(int i, BlockPosition blockposition, int j) {
+        // Iterator iterator = this.a.getPlayerList().v().iterator(); // Paper
+
+        // CraftBukkit start
+        EntityHuman entityhuman = null;
+        Entity entity = world.getEntity(i);
+        if (entity instanceof EntityHuman) entityhuman = (EntityHuman) entity;
+        // CraftBukkit end
+
+        // Paper start
+        java.util.List<? extends EntityHuman> list = entity != null ? entity.world.players : this.a.getPlayerList().v();
+        Iterator<? extends EntityHuman> iterator = list.iterator();
+		PacketPlayOutBlockBreakAnimation packet = null; // NeonPaper - cache packet
+        while (iterator.hasNext()) {
+            EntityHuman human = iterator.next();
+            if (!(human instanceof EntityPlayer)) continue;
+            EntityPlayer entityplayer = (EntityPlayer) human;
+            // Paper end
+
+            if (entityplayer != null && entityplayer.world == this.world && entityplayer.getId() != i) {
+                double d0 = (double) blockposition.getX() - entityplayer.locX;
+                double d1 = (double) blockposition.getY() - entityplayer.locY;
+                double d2 = (double) blockposition.getZ() - entityplayer.locZ;
+
+                // CraftBukkit start
+                if (entityhuman != null && entityhuman instanceof EntityPlayer && !entityplayer.getBukkitEntity().canSee(((EntityPlayer) entityhuman).getBukkitEntity())) {
+                    continue;
+                }
+                // CraftBukkit end
+
+                if (d0 * d0 + d1 * d1 + d2 * d2 < 1024.0D) {
+                // NeonPaper start
+                if (packet == null) packet = new PacketPlayOutBlockBreakAnimation(i, blockposition, j);
+                    entityplayer.playerConnection.sendPacket(packet);
+                // NeonPaper end
+                }
+            }
+        }
+
+    }
+}

sources/src/main/java/org/bukkit/craftbukkit/CraftChunk.java

@@ -0,0 +1,317 @@
+package org.bukkit.craftbukkit;
+
+import java.lang.ref.WeakReference;
+import java.util.Arrays;
+
+import java.util.Random;
+import net.minecraft.server.*;
+
+import org.bukkit.Chunk;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockState;
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.entity.Entity;
+import org.bukkit.ChunkSnapshot;
+
+public class CraftChunk implements Chunk {
+    private WeakReference<net.minecraft.server.Chunk> weakChunk;
+    private final WorldServer worldServer;
+    private final int x;
+    private final int z;
+    private static final byte[] emptyData = new byte[2048];
+    private static final short[] emptyBlockIDs = new short[4096];
+    private static final byte[] emptySkyLight = new byte[2048];
+
+    public CraftChunk(net.minecraft.server.Chunk chunk) {
+        this.weakChunk = new WeakReference<net.minecraft.server.Chunk>(chunk);
+
+        worldServer = (WorldServer) getHandle().world;
+        x = getHandle().locX;
+        z = getHandle().locZ;
+    }
+
+    public World getWorld() {
+        return worldServer.getWorld();
+    }
+
+    public CraftWorld getCraftWorld() {
+        return (CraftWorld) getWorld();
+    }
+
+    public net.minecraft.server.Chunk getHandle() {
+        net.minecraft.server.Chunk c = weakChunk.get();
+
+        if (c == null) {
+            c = worldServer.getChunkAt(x, z);
+
+            weakChunk = new WeakReference<net.minecraft.server.Chunk>(c);
+        }
+
+        return c;
+    }
+
+    void breakLink() {
+        weakChunk.clear();
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public int getZ() {
+        return z;
+    }
+
+    @Override
+    public String toString() {
+        return "CraftChunk{" + "x=" + getX() + "z=" + getZ() + '}';
+    }
+
+    public Block getBlock(int x, int y, int z) {
+        return new CraftBlock(this, (getX() << 4) | (x & 0xF), y, (getZ() << 4) | (z & 0xF));
+    }
+
+    public Entity[] getEntities() {
+        int count = 0, index = 0;
+        net.minecraft.server.Chunk chunk = getHandle();
+
+        for (int i = 0; i < 16; i++) {
+            count += chunk.entitySlices[i].size();
+        }
+
+        Entity[] entities = new Entity[count];
+
+        for (int i = 0; i < 16; i++) {
+
+            //for (Object obj : chunk.entitySlices[i].toArray()) {
+            //    if (!(obj instanceof net.minecraft.server.Entity)) {
+            // NeonPaper start - speed up (was with chunk.entitySlices[i].toArray() and cast checks which costs a lot of performance if called often)
+			for (net.minecraft.server.Entity entity : chunk.entitySlices[i]) {
+                if (entity == null) {
+                    continue;
+                }
+
+                //entities[index++] = ((net.minecraft.server.Entity) obj).getBukkitEntity();
+				entities[index++] = entity.getBukkitEntity();
+            }
+			//NeonPaper end
+        }
+
+        return entities;
+    }
+
+    public BlockState[] getTileEntities() {
+        int index = 0;
+        net.minecraft.server.Chunk chunk = getHandle();
+
+        BlockState[] entities = new BlockState[chunk.tileEntities.size()];
+
+        for (Object obj : chunk.tileEntities.keySet().toArray()) {
+            if (!(obj instanceof BlockPosition)) {
+                continue;
+            }
+
+            BlockPosition position = (BlockPosition) obj;
+            entities[index++] = worldServer.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()).getState();
+        }
+
+        return entities;
+    }
+
+    public boolean isLoaded() {
+        return getWorld().isChunkLoaded(this);
+    }
+
+    public boolean load() {
+        return getWorld().loadChunk(getX(), getZ(), true);
+    }
+
+    public boolean load(boolean generate) {
+        return getWorld().loadChunk(getX(), getZ(), generate);
+    }
+
+    public boolean unload() {
+        return getWorld().unloadChunk(getX(), getZ());
+    }
+
+    @Override
+    public boolean isSlimeChunk() {
+        // 987234911L is deterimined in EntitySlime when seeing if a slime can spawn in a chunk
+        return getHandle().a(worldServer.spigotConfig.slimeSeed).nextInt(10) == 0;
+    }
+
+    public boolean unload(boolean save) {
+        return getWorld().unloadChunk(getX(), getZ(), save);
+    }
+
+    public boolean unload(boolean save, boolean safe) {
+        return getWorld().unloadChunk(getX(), getZ(), save, safe);
+    }
+
+    public ChunkSnapshot getChunkSnapshot() {
+        return getChunkSnapshot(true, false, false);
+    }
+
+    public ChunkSnapshot getChunkSnapshot(boolean includeMaxBlockY, boolean includeBiome, boolean includeBiomeTempRain) {
+        net.minecraft.server.Chunk chunk = getHandle();
+
+        ChunkSection[] cs = chunk.getSections();
+        short[][] sectionBlockIDs = new short[cs.length][];
+        byte[][] sectionBlockData = new byte[cs.length][];
+        byte[][] sectionSkyLights = new byte[cs.length][];
+        byte[][] sectionEmitLights = new byte[cs.length][];
+        boolean[] sectionEmpty = new boolean[cs.length];
+
+        for (int i = 0; i < cs.length; i++) {
+            if (cs[i] == null) { // Section is empty?
+                sectionBlockIDs[i] = emptyBlockIDs;
+                sectionBlockData[i] = emptyData;
+                sectionSkyLights[i] = emptySkyLight;
+                sectionEmitLights[i] = emptyData;
+                sectionEmpty[i] = true;
+            } else { // Not empty
+                short[] blockids = new short[4096];
+
+                byte[] rawIds = new byte[4096];
+                NibbleArray data = new NibbleArray();
+                cs[i].getBlocks().exportData(rawIds, data);
+
+                byte[] dataValues = sectionBlockData[i] = data.asBytes();
+
+                // Copy base IDs
+                for (int j = 0; j < 4096; j++) {
+                    blockids[j] = (short) (rawIds[j] & 0xFF);
+                }
+
+                sectionBlockIDs[i] = blockids;
+
+                if (cs[i].getSkyLightArray() == null) {
+                    sectionSkyLights[i] = emptyData;
+                } else {
+                    sectionSkyLights[i] = new byte[2048];
+                    System.arraycopy(cs[i].getSkyLightArray().asBytes(), 0, sectionSkyLights[i], 0, 2048);
+                }
+                sectionEmitLights[i] = new byte[2048];
+                System.arraycopy(cs[i].getEmittedLightArray().asBytes(), 0, sectionEmitLights[i], 0, 2048);
+            }
+        }
+
+        int[] hmap = null;
+
+        if (includeMaxBlockY) {
+            hmap = new int[256]; // Get copy of height map
+            System.arraycopy(chunk.heightMap, 0, hmap, 0, 256);
+        }
+
+        BiomeBase[] biome = null;
+        double[] biomeTemp = null;
+        double[] biomeRain = null;
+
+        if (includeBiome || includeBiomeTempRain) {
+            WorldChunkManager wcm = chunk.world.getWorldChunkManager();
+
+            if (includeBiome) {
+                biome = new BiomeBase[256];
+                for (int i = 0; i < 256; i++) {
+                    biome[i] = chunk.getBiome(new BlockPosition(i & 0xF, 0, i >> 4), wcm);
+                }
+            }
+
+            if (includeBiomeTempRain) {
+                biomeTemp = new double[256];
+                biomeRain = new double[256];
+                float[] dat = getTemperatures(wcm, getX() << 4, getZ() << 4);
+
+                for (int i = 0; i < 256; i++) {
+                    biomeTemp[i] = dat[i];
+                }
+
+                /* Removed 15w46a
+                dat = wcm.getWetness(null, getX() << 4, getZ() << 4, 16, 16);
+
+                for (int i = 0; i < 256; i++) {
+                    biomeRain[i] = dat[i];
+                }
+                */
+            }
+        }
+
+        World world = getWorld();
+        return new CraftChunkSnapshot(getX(), getZ(), world.getName(), world.getFullTime(), sectionBlockIDs, sectionBlockData, sectionSkyLights, sectionEmitLights, sectionEmpty, hmap, biome, biomeTemp, biomeRain);
+    }
+
+    public static ChunkSnapshot getEmptyChunkSnapshot(int x, int z, CraftWorld world, boolean includeBiome, boolean includeBiomeTempRain) {
+        BiomeBase[] biome = null;
+        double[] biomeTemp = null;
+        double[] biomeRain = null;
+
+        if (includeBiome || includeBiomeTempRain) {
+            WorldChunkManager wcm = world.getHandle().getWorldChunkManager();
+
+            if (includeBiome) {
+                biome = new BiomeBase[256];
+                for (int i = 0; i < 256; i++) {
+                    biome[i] = world.getHandle().getBiome(new BlockPosition((x << 4) + (i & 0xF), 0, (z << 4) + (i >> 4)));
+                }
+            }
+
+            if (includeBiomeTempRain) {
+                biomeTemp = new double[256];
+                biomeRain = new double[256];
+                float[] dat = getTemperatures(wcm, x << 4, z << 4);
+
+                for (int i = 0; i < 256; i++) {
+                    biomeTemp[i] = dat[i];
+                }
+
+                /* Removed 15w46a
+                dat = wcm.getWetness(null, x << 4, z << 4, 16, 16);
+
+                for (int i = 0; i < 256; i++) {
+                    biomeRain[i] = dat[i];
+                }
+                */
+            }
+        }
+
+        /* Fill with empty data */
+        int hSection = world.getMaxHeight() >> 4;
+        short[][] blockIDs = new short[hSection][];
+        byte[][] skyLight = new byte[hSection][];
+        byte[][] emitLight = new byte[hSection][];
+        byte[][] blockData = new byte[hSection][];
+        boolean[] empty = new boolean[hSection];
+
+        for (int i = 0; i < hSection; i++) {
+            blockIDs[i] = emptyBlockIDs;
+            skyLight[i] = emptySkyLight;
+            emitLight[i] = emptyData;
+            blockData[i] = emptyData;
+            empty[i] = true;
+        }
+
+        return new CraftChunkSnapshot(x, z, world.getName(), world.getFullTime(), blockIDs, blockData, skyLight, emitLight, empty, new int[256], biome, biomeTemp, biomeRain);
+    }
+
+    private static float[] getTemperatures(WorldChunkManager chunkmanager, int chunkX, int chunkZ) {
+        BiomeBase[] biomes = chunkmanager.getBiomes(null, chunkX, chunkZ, 16, 16);
+        float[] temps = new float[biomes.length];
+
+        for (int i = 0; i < biomes.length; i++) {
+            float temp = biomes[i].getTemperature(); // Vanilla of olde: ((int) biomes[i].temperature * 65536.0F) / 65536.0F
+
+            if (temp > 1F) {
+                temp = 1F;
+            }
+
+            temps[i] = temp;
+        }
+
+        return temps;
+    }
+
+    static {
+        Arrays.fill(emptySkyLight, (byte) 0xFF);
+    }
+}

sources/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -1488,11 +1488,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public int getNoDamageTicks() {
+        // TacoSpigot start - fix incorrect calculation of getNoDamageTicks
+        /*
          if (getHandle().invulnerableTicks > 0) {
              return Math.max(getHandle().invulnerableTicks, getHandle().noDamageTicks);
          } else {
              return getHandle().noDamageTicks;
          }
+        */
+        return Math.max(getHandle().invulnerableTicks, Math.max(0, getHandle().noDamageTicks - (getHandle().maxNoDamageTicks >> 1)));
+        // TacoSpigot end
     }
 
     @Override