Merge remote-tracking branch 'leaf/dev/1.17' into dev/1.17

2021-06-12 21:35:43 -07:00 · 2021-06-12 21:35:43 -07:00 · 5e9c53b5b7
commit 5e9c53b5b7
parent 2a3f1fa30c cef692bcc6
30 changed files with 672 additions and 1483 deletions
--- a/patches/server/0257-Asynchronous-chunk-IO-and-loading.patch
+++ b/patches/server/0257-Asynchronous-chunk-IO-and-loading.patch
--- a/patches/server/0258-Add-ray-tracing-methods-to-LivingEntity.patch
+++ b/patches/server/0258-Add-ray-tracing-methods-to-LivingEntity.patch
@ -0,0 +1,90 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <Blake.Galbreath@GMail.com>
+Date: Mon, 3 Sep 2018 18:20:03 -0500
+Subject: [PATCH] Add ray tracing methods to LivingEntity
+
+
+diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
+index 49fd3486a6c595749f33bbe1c1bec0454e4725c5..5c290f263fc2b643987c96ea75729bf1ff493760 100644
+--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
+@@ -482,6 +482,18 @@ public final class MCUtil {
+         return getNMSWorld(entity.getWorld());
+     }
+ 
+    public static ClipContext.Fluid getNMSFluidCollisionOption(com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        switch (fluidMode) {
+            case NEVER:
+                return ClipContext.Fluid.NONE;
+            case SOURCE_ONLY:
+                return ClipContext.Fluid.SOURCE_ONLY;
+            case ALWAYS:
+                return ClipContext.Fluid.ANY;
+        }
+        return null;
+    }
+
+     public static BlockFace toBukkitBlockFace(Direction enumDirection) {
+         switch (enumDirection) {
+             case DOWN:
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index acf6f04fa229fb0850217ff3d50bf3b8c16cafdf..773c1e0ed3e10157c968d84b19947d99bb01371a 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -3686,6 +3686,23 @@ public abstract class LivingEntity extends Entity {
+     }
+ 
+     // Paper start
+    public HitResult getRayTrace(int maxDistance) {
+        return getRayTrace(maxDistance, ClipContext.Fluid.NONE);
+    }
+
+    public HitResult getRayTrace(int maxDistance, ClipContext.Fluid fluidCollisionOption) {
+        if (maxDistance < 1 || maxDistance > 120) {
+            throw new IllegalArgumentException("maxDistance must be between 1-120");
+        }
+
+        Vec3 start = new Vec3(getX(), getY() + getEyeHeight(), getZ());
+        org.bukkit.util.Vector dir = getBukkitEntity().getLocation().getDirection().multiply(maxDistance);
+        Vec3 end = new Vec3(start.x + dir.getX(), start.y + dir.getY(), start.z + dir.getZ());
+        ClipContext raytrace = new ClipContext(start, end, ClipContext.Block.OUTLINE, fluidCollisionOption, this);
+
+        return level.clip(raytrace);
+    }
+
+     public int shieldBlockingDelay = level.paperConfig.shieldBlockingDelay;
+ 
+     public int getShieldBlockingDelay() {
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+index 5194da5a141718390a317d75b31205f951cec7a2..cb4c15d17ea3f22e6baa73ba6ce2a18e34ac4b00 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+@@ -190,6 +190,28 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+         return blocks.get(0);
+     }
+ 
+    // Paper start
+    @Override
+    public Block getTargetBlock(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.world.phys.HitResult rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return !(rayTrace instanceof net.minecraft.world.phys.BlockHitResult) ? null : org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().level, ((net.minecraft.world.phys.BlockHitResult)rayTrace).getBlockPos());
+    }
+
+    @Override
+    public org.bukkit.block.BlockFace getTargetBlockFace(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.world.phys.HitResult rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return !(rayTrace instanceof net.minecraft.world.phys.BlockHitResult) ? null : net.minecraft.server.MCUtil.toBukkitBlockFace(((net.minecraft.world.phys.BlockHitResult)rayTrace).getDirection());
+    }
+
+    @Override
+    public com.destroystokyo.paper.block.TargetBlockInfo getTargetBlockInfo(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.world.phys.HitResult rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return !(rayTrace instanceof net.minecraft.world.phys.BlockHitResult) ? null :
+            new com.destroystokyo.paper.block.TargetBlockInfo(org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().level, ((net.minecraft.world.phys.BlockHitResult)rayTrace).getBlockPos()),
+                net.minecraft.server.MCUtil.toBukkitBlockFace(((net.minecraft.world.phys.BlockHitResult)rayTrace).getDirection()));
+    }
+    // Paper end
+
+     @Override
+     public List<Block> getLastTwoTargetBlocks(Set<Material> transparent, int maxDistance) {
+         return this.getLineOfSight(transparent, maxDistance, 2);
--- a/patches/server/0259-Expose-attack-cooldown-methods-for-Player.patch
+++ b/patches/server/0259-Expose-attack-cooldown-methods-for-Player.patch
@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <Blake.Galbreath@GMail.com>
+Date: Tue, 4 Sep 2018 15:02:00 -0500
+Subject: [PATCH] Expose attack cooldown methods for Player
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index f8155d7edb4e13c2ec5ed832231f02ee6eff3f35..91dc9e3b02462211a6964204f5409fbae98027e6 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -2199,6 +2199,21 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+         connection.send(new net.minecraft.network.protocol.game.ClientboundOpenBookPacket(net.minecraft.world.InteractionHand.MAIN_HAND));
+         connection.send(new net.minecraft.network.protocol.game.ClientboundContainerSetSlotPacket(0, slot, inventory.getSelected()));
+     }
+
+    @Override
+    public float getCooldownPeriod() {
+        return getHandle().getCurrentItemAttackStrengthDelay();
+    }
+
+    @Override
+    public float getCooledAttackStrength(float adjustTicks) {
+        return getHandle().getAttackStrengthScale(adjustTicks);
+    }
+
+    @Override
+    public void resetCooldown() {
+        getHandle().resetAttackStrengthTicker();
+    }
+     // Paper end
+ 
+     // Spigot start
--- a/patches/server/0260-Improve-death-events.patch
+++ b/patches/server/0260-Improve-death-events.patch
@ -0,0 +1,376 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Phoenix616 <mail@moep.tv>
+Date: Tue, 21 Aug 2018 01:39:35 +0100
+Subject: [PATCH] Improve death events
+
+This adds the ability to cancel the death events and to modify the sound
+an entity makes when dying. (In cases were no sound should it will be
+called with shouldPlaySound set to false allowing unsilencing of silent
+entities)
+
+It makes handling of entity deaths a lot nicer as you no longer need
+to listen on the damage event and calculate if the entity dies yourself
+to cancel the death which has the benefit of also receiving the dropped
+items and experience which is otherwise only properly possible by using
+internal code.
+
+TODO 1.17: this needs to be checked (actually get off your lazy ass and cancel the events) for the following entities,
+maybe more (please check patch overrides for drops for more):
+- players, armor stands, foxes, chested donkeys/llamas
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index 171500918c8ee248689909ae97230eb18adc33e5..44385d07b2deedffd95bcc428d9d8d3f785143db 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -218,6 +218,10 @@ public class ServerPlayer extends Player {
+     public int latency;
+     public boolean wonGame;
+     private int containerUpdateDelay; // Paper
+    // Paper start - cancellable death event
+    public boolean queueHealthUpdatePacket = false;
+    public net.minecraft.network.protocol.game.ClientboundSetHealthPacket queuedHealthUpdatePacket;
+    // Paper end
+ 
+     // CraftBukkit start
+     public String displayName;
+@@ -751,6 +755,15 @@ public class ServerPlayer extends Player {
+         Component defaultMessage = this.getCombatTracker().getDeathMessage();
+ 
+         org.bukkit.event.entity.PlayerDeathEvent event = CraftEventFactory.callPlayerDeathEvent(this, loot, PaperAdventure.asAdventure(defaultMessage), defaultMessage.getString(), keepInventory); // Paper - Adventure
+        // Paper start - cancellable death event
+        if (event.isCancelled()) {
+            // make compatible with plugins that might have already set the health in an event listener
+            if (this.getHealth() <= 0) {
+                this.setHealth((float) event.getReviveHealth());
+            }
+            return;
+        }
+        // Paper end
+ 
+         // SPIGOT-943 - only call if they have an inventory open
+         if (this.containerMenu != this.inventoryMenu) {
+@@ -898,8 +911,17 @@ public class ServerPlayer extends Player {
+                         }
+                     }
+                 }
+-
+-                return super.hurt(source, amount);
+                // Paper start - cancellable death events
+                //return super.hurt(source, amount);
+                this.queueHealthUpdatePacket = true;
+                boolean damaged = super.hurt(source, amount);
+                this.queueHealthUpdatePacket = false;
+                if (this.queuedHealthUpdatePacket != null) {
+                    this.connection.send(this.queuedHealthUpdatePacket);
+                    this.queuedHealthUpdatePacket = null;
+                }
+                return damaged;
+                // Paper end
+             }
+         }
+     }
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index 773c1e0ed3e10157c968d84b19947d99bb01371a..fd0c307a4b340661ba9aff9ae4e0055c139a1ebd 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -261,6 +261,7 @@ public abstract class LivingEntity extends Entity {
+     public Set<UUID> collidableExemptions = new HashSet<>();
+     public boolean bukkitPickUpLoot;
+     public org.bukkit.craftbukkit.entity.CraftLivingEntity getBukkitLivingEntity() { return (org.bukkit.craftbukkit.entity.CraftLivingEntity) super.getBukkitEntity(); } // Paper
+    public boolean silentDeath = false; // Paper - mark entity as dying silently for cancellable death event
+ 
+     @Override
+     public float getBukkitYaw() {
+@@ -1446,13 +1447,12 @@ public abstract class LivingEntity extends Entity {
+             if (knockbackCancelled) this.level.broadcastEntityEvent(this, (byte) 2); // Paper - Disable explosion knockback
+             if (this.isDeadOrDying()) {
+                 if (!this.checkTotemDeathProtection(source)) {
+-                    SoundEvent soundeffect = this.getDeathSound();
+-
+-                    if (flag1 && soundeffect != null) {
+-                        this.playSound(soundeffect, this.getSoundVolume(), this.getVoicePitch());
+-                    }
+                    // Paper start - moved into CraftEventFactory event caller for cancellable death event
+                    this.silentDeath = !flag1; // mark entity as dying silently
+                    // Paper end
+ 
+                     this.die(source);
+                    this.silentDeath = false; // Paper - cancellable death event - reset to default
+                 }
+             } else if (flag1) {
+                 this.playHurtSound(source);
+@@ -1601,7 +1601,7 @@ public abstract class LivingEntity extends Entity {
+         if (!this.isRemoved() && !this.dead) {
+             Entity entity = source.getEntity();
+             LivingEntity entityliving = this.getKillCredit();
+-
+            /* // Paper - move down to make death event cancellable - this is the runKillTrigger below
+             if (this.deathScore >= 0 && entityliving != null) {
+                 entityliving.awardKillScore(this, this.deathScore, source);
+             }
+@@ -1609,20 +1609,43 @@ public abstract class LivingEntity extends Entity {
+             if (this.isSleeping()) {
+                 this.stopSleeping();
+             }
+             */ // Paper - move down to make death event cancellable - this is the runKillTrigger below
+
+ 
+             this.dead = true;
+-            this.getCombatTracker().recheckStatus();
+            // Paper - moved into if below
+             if (this.level instanceof ServerLevel) {
+                 if (entity != null) {
+-                    entity.killed((ServerLevel) this.level, this);
+                    // Paper - move below into if for onKill
+                 }
+ 
+-                this.dropAllDeathLoot(source);
+                // Paper start
+                org.bukkit.event.entity.EntityDeathEvent deathEvent = this.dropAllDeathLoot(source);
+                if (deathEvent == null || !deathEvent.isCancelled()) {
+                    if (this.deathScore >= 0 && entityliving != null) {
+                        entityliving.awardKillScore(this, this.deathScore, source);
+                    }
+
+                    if (this.isSleeping()) {
+                        this.stopSleeping();
+                    }
+
+                    this.getCombatTracker().recheckStatus();
+                    if (entity != null) {
+                        entity.killed((ServerLevel) this.level, this);
+                    }
+                } else {
+                    this.dead = false;
+                    this.setHealth((float) deathEvent.getReviveHealth());
+                }
+                // Paper end
+                 this.createWitherRose(entityliving);
+             }
+ 
+            if (this.dead) { // Paper
+             this.level.broadcastEntityEvent(this, (byte) 3);
+             this.setPose(Pose.DYING);
+            } // Paper
+         }
+     }
+ 
+@@ -1630,7 +1653,7 @@ public abstract class LivingEntity extends Entity {
+         if (!this.level.isClientSide) {
+             boolean flag = false;
+ 
+-            if (adversary instanceof WitherBoss) {
+            if (this.dead && adversary instanceof WitherBoss) { // Paper
+                 if (this.level.getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING)) {
+                     BlockPos blockposition = this.blockPosition();
+                     BlockState iblockdata = Blocks.WITHER_ROSE.defaultBlockState();
+@@ -1658,7 +1681,7 @@ public abstract class LivingEntity extends Entity {
+         }
+     }
+ 
+-    protected void dropAllDeathLoot(DamageSource source) {
+    protected org.bukkit.event.entity.EntityDeathEvent dropAllDeathLoot(DamageSource source) { // Paper
+         Entity entity = source.getEntity();
+         int i;
+ 
+@@ -1676,15 +1699,18 @@ public abstract class LivingEntity extends Entity {
+             this.dropCustomDeathLoot(source, i, flag);
+         }
+         // CraftBukkit start - Call death event
+-        CraftEventFactory.callEntityDeathEvent(this, this.drops);
+        org.bukkit.event.entity.EntityDeathEvent deathEvent = CraftEventFactory.callEntityDeathEvent(this, this.drops); // Paper
+        this.postDeathDropItems(deathEvent); // Paper
+         this.drops = new ArrayList<>();
+         // CraftBukkit end
+ 
+         // this.dropInventory();// CraftBukkit - moved up
+         this.dropExperience();
+        return deathEvent; // Paper
+     }
+ 
+     protected void dropEquipment() {}
+    protected void postDeathDropItems(org.bukkit.event.entity.EntityDeathEvent event) {} // Paper - method for post death logic that cannot be ran before the event is potentially cancelled
+ 
+     // CraftBukkit start
+     public int getExpReward() {
+@@ -1762,8 +1788,9 @@ public abstract class LivingEntity extends Entity {
+         return SoundEvents.GENERIC_HURT;
+     }
+ 
+
+     @Nullable
+-    protected SoundEvent getDeathSound() {
+    public final SoundEvent getDeathSoundPublic() { return this.getDeathSound(); } protected SoundEvent getDeathSound() { // Paper - provide PUBLIC accessor, overrides are hell to deal with
+         return SoundEvents.GENERIC_DEATH;
+     }
+ 
+@@ -2477,7 +2504,7 @@ public abstract class LivingEntity extends Entity {
+ 
+     }
+ 
+-    protected float getSoundVolume() {
+    public final float getSoundVolumePublic() { return this.getSoundVolume(); } protected float getSoundVolume() { // Paper - provide PUBLIC accessor, overrides are hell
+         return 1.0F;
+     }
+ 
+diff --git a/src/main/java/net/minecraft/world/entity/animal/Fox.java b/src/main/java/net/minecraft/world/entity/animal/Fox.java
+index c1cdb1905536bda76f34ad3fc796996443839767..31f4e4a93ea5fd3ffe7e60dff2e2a9642b51daa2 100644
+--- a/src/main/java/net/minecraft/world/entity/animal/Fox.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Fox.java
+@@ -691,15 +691,25 @@ public class Fox extends Animal {
+     }
+ 
+     @Override
+-    protected void dropAllDeathLoot(DamageSource source) {
+-        ItemStack itemstack = this.getItemBySlot(EquipmentSlot.MAINHAND);
+    // Paper start - Cancellable death event
+    protected org.bukkit.event.entity.EntityDeathEvent dropAllDeathLoot(DamageSource source) {
+        ItemStack itemstack = this.getItemBySlot(EquipmentSlot.MAINHAND).copy(); // Paper - modified by supercall
+
+        org.bukkit.event.entity.EntityDeathEvent deathEvent = super.dropAllDeathLoot(source);
+
+        // Below is code to drop
+
+        if (deathEvent == null || deathEvent.isCancelled()) {
+            return deathEvent;
+        }
+        // Paper end
+ 
+         if (!itemstack.isEmpty()) {
+             this.spawnAtLocation(itemstack);
+             this.setItemSlot(EquipmentSlot.MAINHAND, ItemStack.EMPTY);
+         }
+ 
+-        super.dropAllDeathLoot(source);
+        return deathEvent; // Paper
+     }
+ 
+     public static boolean isPathClear(Fox fox, LivingEntity chasedEntity) {
+diff --git a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractChestedHorse.java b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractChestedHorse.java
+index 224eca7d20cf4b890a6bc1b314d566e02e716762..7281eb294ddd178ba742088d3c61bf3d529ff0c4 100644
+--- a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractChestedHorse.java
+++ b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractChestedHorse.java
+@@ -68,11 +68,19 @@ public abstract class AbstractChestedHorse extends AbstractHorse {
+                 this.spawnAtLocation(Blocks.CHEST);
+             }
+ 
+-            this.setChest(false);
+            //this.setCarryingChest(false); // Paper - moved to post death logic
+         }
+ 
+     }
+ 
+    // Paper start
+    protected void postDeathDropItems(org.bukkit.event.entity.EntityDeathEvent event) {
+        if (this.hasChest() && (event == null || !event.isCancelled())) {
+            this.setChest(false);
+        }
+    }
+    // Paper end
+
+     @Override
+     public void addAdditionalSaveData(CompoundTag nbt) {
+         super.addAdditionalSaveData(nbt);
+diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+index 4adde11daa5ca97a2bf9c164c43c5c011a89b33d..cb9969d768b13863722aad3dc5daad3c10bb264a 100644
+--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+@@ -755,7 +755,8 @@ public class ArmorStand extends LivingEntity {
+ 
+     @Override
+     public void kill() {
+-        org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDeathEvent(this, drops); // CraftBukkit - call event
+        org.bukkit.event.entity.EntityDeathEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDeathEvent(this, drops); // CraftBukkit - call event // Paper - make cancellable
+        if (event.isCancelled()) return; // Paper - make cancellable
+         this.remove(Entity.RemovalReason.KILLED);
+     }
+ 
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index 91dc9e3b02462211a6964204f5409fbae98027e6..22032108fdaed14663a9d7e0b6757eef5237c4dd 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -1849,7 +1849,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+     }
+ 
+     public void sendHealthUpdate() {
+-        this.getHandle().connection.send(new ClientboundSetHealthPacket(this.getScaledHealth(), this.getHandle().getFoodData().getFoodLevel(), this.getHandle().getFoodData().getSaturationLevel()));
+        // Paper start - cancellable death event
+        ClientboundSetHealthPacket packet = new ClientboundSetHealthPacket(this.getScaledHealth(), this.getHandle().getFoodData().getFoodLevel(), this.getHandle().getFoodData().getSaturationLevel());
+        if (this.getHandle().queueHealthUpdatePacket) {
+            this.getHandle().queuedHealthUpdatePacket = packet;
+        } else {
+            this.getHandle().connection.send(packet);
+        }
+        // Paper end
+     }
+ 
+     public void injectScaledMaxHealth(Collection<AttributeInstance> collection, boolean force) {
+diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+index a81fc5212648056766824113b372a7c772c19e5a..f0c3255e0b4e1ecf4a54213c6458c92a7389b134 100644
+--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+@@ -770,9 +770,16 @@ public class CraftEventFactory {
+     public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, List<org.bukkit.inventory.ItemStack> drops) {
+         CraftLivingEntity entity = (CraftLivingEntity) victim.getBukkitEntity();
+         EntityDeathEvent event = new EntityDeathEvent(entity, drops, victim.getExpReward());
+        populateFields(victim, event); // Paper - make cancellable
+         CraftWorld world = (CraftWorld) entity.getWorld();
+         Bukkit.getServer().getPluginManager().callEvent(event);
+ 
+        // Paper start - make cancellable
+        if (event.isCancelled()) {
+            return event;
+        }
+        playDeathSound(victim, event);
+        // Paper end
+         victim.expToDrop = event.getDroppedExp();
+ 
+         for (org.bukkit.inventory.ItemStack stack : event.getDrops()) {
+@@ -788,8 +795,15 @@ public class CraftEventFactory {
+         CraftPlayer entity = victim.getBukkitEntity();
+         PlayerDeathEvent event = new PlayerDeathEvent(entity, drops, victim.getExpReward(), 0, deathMessage, stringDeathMessage); // Paper - Adventure
+         event.setKeepInventory(keepInventory);
+        populateFields(victim, event); // Paper - make cancellable
+         org.bukkit.World world = entity.getWorld();
+         Bukkit.getServer().getPluginManager().callEvent(event);
+        // Paper start - make cancellable
+        if (event.isCancelled()) {
+            return event;
+        }
+        playDeathSound(victim, event);
+        // Paper end
+ 
+         victim.keepLevel = event.getKeepLevel();
+         victim.newLevel = event.getNewLevel();
+@@ -806,6 +820,31 @@ public class CraftEventFactory {
+         return event;
+     }
+ 
+    // Paper start - helper methods for making death event cancellable
+    // Add information to death event
+    private static void populateFields(net.minecraft.world.entity.LivingEntity victim, EntityDeathEvent event) {
+        event.setReviveHealth(event.getEntity().getAttribute(org.bukkit.attribute.Attribute.GENERIC_MAX_HEALTH).getValue());
+        event.setShouldPlayDeathSound(!victim.silentDeath && !victim.isSilent());
+        net.minecraft.sounds.SoundEvent soundEffect = victim.getDeathSoundPublic();
+        event.setDeathSound(soundEffect != null ? org.bukkit.craftbukkit.CraftSound.getBukkit(soundEffect) : null);
+        event.setDeathSoundCategory(org.bukkit.SoundCategory.valueOf(victim.getSoundSource().name()));
+        event.setDeathSoundVolume(victim.getSoundVolumePublic());
+        event.setDeathSoundPitch(victim.getVoicePitch());
+    }
+
+    // Play death sound manually
+    private static void playDeathSound(net.minecraft.world.entity.LivingEntity victim, EntityDeathEvent event) {
+        if (event.shouldPlayDeathSound() && event.getDeathSound() != null && event.getDeathSoundCategory() != null) {
+            net.minecraft.world.entity.player.Player source = victim instanceof net.minecraft.world.entity.player.Player ? (net.minecraft.world.entity.player.Player) victim : null;
+            double x = event.getEntity().getLocation().getX();
+            double y = event.getEntity().getLocation().getY();
+            double z = event.getEntity().getLocation().getZ();
+            net.minecraft.sounds.SoundEvent soundEffect = org.bukkit.craftbukkit.CraftSound.getSoundEffect(event.getDeathSound());
+            net.minecraft.sounds.SoundSource soundCategory = net.minecraft.sounds.SoundSource.valueOf(event.getDeathSoundCategory().name());
+            victim.level.playSound(source, x, y, z, soundEffect, soundCategory, event.getDeathSoundVolume(), event.getDeathSoundPitch());
+        }
+    }
+    // Paper end
+     /**
+      * Server methods
+      */
--- a/patches/server/0261-Allow-chests-to-be-placed-with-NBT-data.patch
+++ b/patches/server/0261-Allow-chests-to-be-placed-with-NBT-data.patch
@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <Blake.Galbreath@GMail.com>
+Date: Sat, 8 Sep 2018 18:43:31 -0500
+Subject: [PATCH] Allow chests to be placed with NBT data
+
+
+diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
+index 8b3cf3b882ea6c0d48df8b551f4b85b87b889c58..dd4deb08eb3ed15a156269a11d3d43abfd61fe5b 100644
+--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
+@@ -339,6 +339,7 @@ public final class ItemStack {
+                     enuminteractionresult = InteractionResult.FAIL; // cancel placement
+                     // PAIL: Remove this when MC-99075 fixed
+                     placeEvent.getPlayer().updateInventory();
+                    world.capturedTileEntities.clear(); // Paper - clear out tile entities as chests and such will pop loot
+                     // revert back all captured blocks
+                     for (BlockState blockstate : blocks) {
+                         blockstate.update(true, false);
+diff --git a/src/main/java/net/minecraft/world/level/block/entity/ChestBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/ChestBlockEntity.java
+index f2c9755c2b55bee2a0b981313e1fcd1f8ab5e3d8..52de9852f87d346714a950b60a0004d386ac10f0 100644
+--- a/src/main/java/net/minecraft/world/level/block/entity/ChestBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/ChestBlockEntity.java
+@@ -239,7 +239,7 @@ public class ChestBlockEntity extends RandomizableContainerBlockEntity implement
+     // CraftBukkit start
+     @Override
+     public boolean onlyOpCanSetNbt() {
+-        return true;
+        return false; // Paper
+     }
+     // CraftBukkit end
+ }
--- a/patches/server/0262-Mob-Pathfinding-API.patch
+++ b/patches/server/0262-Mob-Pathfinding-API.patch
@ -0,0 +1,289 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 9 Sep 2018 13:30:00 -0400
+Subject: [PATCH] Mob Pathfinding API
+
+Implements Pathfinding API for mobs
+
+diff --git a/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java b/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..92d1bb8b9cdb9eb0c04574c0b6ba5acdca9fb377
+--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java
+@@ -0,0 +1,139 @@
+package com.destroystokyo.paper.entity;
+
+import org.apache.commons.lang.Validate;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.entity.CraftLivingEntity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Mob;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import net.minecraft.world.level.pathfinder.Node;
+import net.minecraft.world.level.pathfinder.Path;
+import java.util.ArrayList;
+import java.util.List;
+
+public class PaperPathfinder implements com.destroystokyo.paper.entity.Pathfinder {
+
+    private final net.minecraft.world.entity.Mob entity;
+
+    public PaperPathfinder(net.minecraft.world.entity.Mob entity) {
+        this.entity = entity;
+    }
+
+    @Override
+    public Mob getEntity() {
+        return entity.getBukkitMob();
+    }
+
+    @Override
+    public void stopPathfinding() {
+        entity.getNavigation().stopPathfinding();
+    }
+
+    @Override
+    public boolean hasPath() {
+        return entity.getNavigation().getPathEntity() != null;
+    }
+
+    @Nullable
+    @Override
+    public PathResult getCurrentPath() {
+        Path path = entity.getNavigation().getPathEntity();
+        return path != null ? new PaperPathResult(path) : null;
+    }
+
+    @Nullable
+    @Override
+    public PathResult findPath(Location loc) {
+        Validate.notNull(loc, "Location can not be null");
+        Path path = entity.getNavigation().calculateDestination(loc.getX(), loc.getY(), loc.getZ());
+        return path != null ? new PaperPathResult(path) : null;
+    }
+
+    @Nullable
+    @Override
+    public PathResult findPath(LivingEntity target) {
+        Validate.notNull(target, "Target can not be null");
+        Path path = entity.getNavigation().calculateDestination(((CraftLivingEntity) target).getHandle());
+        return path != null ? new PaperPathResult(path) : null;
+    }
+
+    @Override
+    public boolean moveTo(@Nonnull PathResult path, double speed) {
+        Validate.notNull(path, "PathResult can not be null");
+        Path pathEntity = ((PaperPathResult) path).path;
+        return entity.getNavigation().setDestination(pathEntity, speed);
+    }
+
+    @Override
+    public boolean canOpenDoors() {
+        return entity.getNavigation().getPathfinder().getPathfinder().shouldOpenDoors();
+    }
+
+    @Override
+    public void setCanOpenDoors(boolean canOpenDoors) {
+        entity.getNavigation().getPathfinder().getPathfinder().setShouldOpenDoors(canOpenDoors);
+    }
+
+    @Override
+    public boolean canPassDoors() {
+        return entity.getNavigation().getPathfinder().getPathfinder().shouldPassDoors();
+    }
+
+    @Override
+    public void setCanPassDoors(boolean canPassDoors) {
+        entity.getNavigation().getPathfinder().getPathfinder().setShouldPassDoors(canPassDoors);
+    }
+
+    @Override
+    public boolean canFloat() {
+        return entity.getNavigation().getPathfinder().getPathfinder().shouldFloat();
+    }
+
+    @Override
+    public void setCanFloat(boolean canFloat) {
+        entity.getNavigation().getPathfinder().getPathfinder().setShouldFloat(canFloat);
+    }
+
+    public class PaperPathResult implements com.destroystokyo.paper.entity.PaperPathfinder.PathResult {
+
+        private final Path path;
+        PaperPathResult(Path path) {
+            this.path = path;
+        }
+
+        @Nullable
+        @Override
+        public Location getFinalPoint() {
+            Node point = path.getFinalPoint();
+            return point != null ? toLoc(point) : null;
+        }
+
+        @Override
+        public List<Location> getPoints() {
+            List<Location> points = new ArrayList<>();
+            for (Node point : path.getPoints()) {
+                points.add(toLoc(point));
+            }
+            return points;
+        }
+
+        @Override
+        public int getNextPointIndex() {
+            return path.getNextIndex();
+        }
+
+        @Nullable
+        @Override
+        public Location getNextPoint() {
+            if (!path.hasNext()) {
+                return null;
+            }
+            return toLoc(path.getPoints().get(path.getNextIndex()));
+        }
+    }
+
+    private Location toLoc(Node point) {
+        return new Location(entity.level.getWorld(), point.getX(), point.getY(), point.getZ());
+    }
+}
+diff --git a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+index 8212aab2884c2a894bc981850e483ce31814c708..69edca1ef95c37b11fe3f793e6a8f8a674bd7f6f 100644
+--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+@@ -93,7 +93,7 @@ public abstract class PathNavigation {
+     }
+ 
+     @Nullable
+-    public final Path createPath(double x, double y, double z, int distance) {
+    public final Path calculateDestination(double d0, double d1, double d2) { return createPath(d0, d1, d2, 0); } public final Path createPath(double x, double y, double z, int distance) { // Paper - OBFHELPER
+         return this.createPath(new BlockPos(x, y, z), distance);
+     }
+ 
+@@ -123,7 +123,7 @@ public abstract class PathNavigation {
+     }
+ 
+     @Nullable
+-    public Path createPath(Entity entity, int distance) {
+    public final Path calculateDestination(Entity entity) { return createPath(entity, 0); }  public Path createPath(Entity entity, int distance) {
+         return this.createPath(ImmutableSet.of(entity.blockPosition()), entity, 16, true, distance); // Paper
+     }
+ 
+@@ -195,6 +195,7 @@ public abstract class PathNavigation {
+         return path != null && this.moveTo(path, speed);
+     }
+ 
+    public boolean setDestination(@Nullable Path pathentity, double speed) { return moveTo(pathentity, speed); } // Paper - OBFHELPER
+     public boolean moveTo(@Nullable Path path, double speed) {
+         if (path == null) {
+             this.path = null;
+@@ -221,7 +222,7 @@ public abstract class PathNavigation {
+         }
+     }
+ 
+-    @Nullable
+    @Nullable public Path getPathEntity() { return getPath(); } @Nullable // Paper - OBFHELPER
+     public Path getPath() {
+         return this.path;
+     }
+@@ -335,6 +336,7 @@ public abstract class PathNavigation {
+         return !this.isDone();
+     }
+ 
+    public void stopPathfinding() { stop(); } // Paper - OBFHELPER
+     public void stop() {
+         this.path = null;
+     }
+diff --git a/src/main/java/net/minecraft/world/level/pathfinder/Node.java b/src/main/java/net/minecraft/world/level/pathfinder/Node.java
+index d7a86444d0e76154319c409317fc5ac9c54403a8..328f050ae68e0b42690f05e5995fb2711b8cf46d 100644
+--- a/src/main/java/net/minecraft/world/level/pathfinder/Node.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/Node.java
+@@ -6,9 +6,9 @@ import net.minecraft.util.Mth;
+ import net.minecraft.world.phys.Vec3;
+ 
+ public class Node {
+-    public final int x;
+-    public final int y;
+-    public final int z;
+    public final int x; public final int getX() { return x; } // Paper - OBFHELPER
+    public final int y; public final int getY() { return y; } // Paper - OBFHELPER
+    public final int z; public final int getZ() { return z; } // Paper - OBFHELPER
+     private final int hash;
+     public int heapIdx = -1;
+     public float g;
+diff --git a/src/main/java/net/minecraft/world/level/pathfinder/NodeEvaluator.java b/src/main/java/net/minecraft/world/level/pathfinder/NodeEvaluator.java
+index 72ca8adb9fa65588c6b1e19be2dc27a36c0146a6..e5bfd9ade1a49e11afd4a49784a0874654945709 100644
+--- a/src/main/java/net/minecraft/world/level/pathfinder/NodeEvaluator.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/NodeEvaluator.java
+@@ -15,9 +15,9 @@ public abstract class NodeEvaluator {
+     protected int entityWidth;
+     protected int entityHeight;
+     protected int entityDepth;
+-    protected boolean canPassDoors;
+-    protected boolean canOpenDoors;
+-    protected boolean canFloat;
+    protected boolean canPassDoors; public boolean shouldPassDoors() { return canPassDoors; } public void setShouldPassDoors(boolean b) { canPassDoors = b; } // Paper - obfhelper
+    protected boolean canOpenDoors; public boolean shouldOpenDoors() { return canOpenDoors; } public void setShouldOpenDoors(boolean b) { canOpenDoors = b; } // Paper - obfhelper
+    protected boolean canFloat; public boolean shouldFloat() { return canFloat; } public void setShouldFloat(boolean b) { canFloat = b; } // Paper - obfhelper
+ 
+     public void prepare(PathNavigationRegion cachedWorld, Mob entity) {
+         this.level = cachedWorld;
+diff --git a/src/main/java/net/minecraft/world/level/pathfinder/Path.java b/src/main/java/net/minecraft/world/level/pathfinder/Path.java
+index 6928c415e328dd7cff2e9ec553bc4faa1ff8facf..e95312e5b0f0200178cbe1a61b3629dfeac55b4a 100644
+--- a/src/main/java/net/minecraft/world/level/pathfinder/Path.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/Path.java
+@@ -12,14 +12,15 @@ import net.minecraft.world.entity.Entity;
+ import net.minecraft.world.phys.Vec3;
+ 
+ public class Path {
+-    private final List<Node> nodes;
+    private final List<Node> nodes; public List<Node> getPoints() { return nodes; } // Paper - OBFHELPER
+     private Node[] openSet = new Node[0];
+     private Node[] closedSet = new Node[0];
+     private Set<Target> targetNodes;
+-    private int nextNodeIndex;
+    private int nextNodeIndex; public int getNextIndex() { return this.nextNodeIndex; } // Paper - OBFHELPER
+     private final BlockPos target;
+     private final float distToTarget;
+     private final boolean reached;
+    public boolean hasNext() { return getNextIndex() < getPoints().size(); } // Paper
+ 
+     public Path(List<Node> nodes, BlockPos target, boolean reachesTarget) {
+         this.nodes = nodes;
+@@ -41,7 +42,7 @@ public class Path {
+     }
+ 
+     @Nullable
+-    public Node getEndNode() {
+    public Node getFinalPoint() { return getEndNode(); } @Nullable public Node getEndNode() { // Paper - OBFHELPER
+         return !this.nodes.isEmpty() ? this.nodes.get(this.nodes.size() - 1) : null;
+     }
+ 
+@@ -88,7 +89,7 @@ public class Path {
+         return this.getEntityPosAtNode(entity, this.nextNodeIndex);
+     }
+ 
+-    public BlockPos getNextNodePos() {
+    public BlockPos getNext() { return getNextNodePos(); } public BlockPos getNextNodePos() { // Paper - OBFHELPER
+         return this.nodes.get(this.nextNodeIndex).asBlockPos();
+     }
+ 
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
+index 71872fdfafca82cf745eecee4bf984726d49f5a4..9c9fa83615cd06539ce5e4e3d4feaa69f65b7931 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
+@@ -11,8 +11,11 @@ import org.bukkit.loot.LootTable;
+ public abstract class CraftMob extends CraftLivingEntity implements Mob {
+     public CraftMob(CraftServer server, net.minecraft.world.entity.Mob entity) {
+         super(server, entity);
+         paperPathfinder = new com.destroystokyo.paper.entity.PaperPathfinder(entity); // Paper
+     }
+ 
+    private final com.destroystokyo.paper.entity.PaperPathfinder paperPathfinder; // Paper
+    @Override public com.destroystokyo.paper.entity.Pathfinder getPathfinder() { return paperPathfinder; } // Paper
+     @Override
+     public void setTarget(LivingEntity target) {
+         net.minecraft.world.entity.Mob entity = this.getHandle();
--- a/patches/server/0263-Prevent-chunk-loading-from-Fluid-Flowing.patch
+++ b/patches/server/0263-Prevent-chunk-loading-from-Fluid-Flowing.patch
@ -0,0 +1,75 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Mon, 10 Sep 2018 23:36:16 -0400
+Subject: [PATCH] Prevent chunk loading from Fluid Flowing
+
+
+diff --git a/src/main/java/net/minecraft/world/level/material/FlowingFluid.java b/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
+index 21e2ffc105b7b573b19c826a5877ed726156e692..6e3e873efa1f50f53cb6503bde8a981f9cefd006 100644
+--- a/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
+@@ -176,7 +176,8 @@ public abstract class FlowingFluid extends Fluid {
+                 Direction enumdirection = (Direction) entry.getKey();
+                 FluidState fluid1 = (FluidState) entry.getValue();
+                 BlockPos blockposition1 = pos.relative(enumdirection);
+-                BlockState iblockdata1 = world.getBlockState(blockposition1);
+                BlockState iblockdata1 = world.getTypeIfLoaded(blockposition1); // Paper
+                if (iblockdata1 == null) continue; // Paper
+ 
+                 if (this.canSpreadTo(world, pos, blockState, enumdirection, blockposition1, iblockdata1, world.getFluidState(blockposition1), fluid1.getType())) {
+                     // CraftBukkit start
+@@ -203,7 +204,8 @@ public abstract class FlowingFluid extends Fluid {
+         while (iterator.hasNext()) {
+             Direction enumdirection = (Direction) iterator.next();
+             BlockPos blockposition1 = pos.relative(enumdirection);
+-            BlockState iblockdata1 = world.getBlockState(blockposition1);
+            BlockState iblockdata1 = world.getTypeIfLoaded(blockposition1); // Paper
+            if (iblockdata1 == null) continue; // Paper
+             FluidState fluid = iblockdata1.getFluidState();
+ 
+             if (fluid.getType().isSame((Fluid) this) && this.canPassThroughWall(enumdirection, (BlockGetter) world, pos, state, blockposition1, iblockdata1)) {
+@@ -320,11 +322,18 @@ public abstract class FlowingFluid extends Fluid {
+             if (enumdirection1 != enumdirection) {
+                 BlockPos blockposition2 = blockposition.relative(enumdirection1);
+                 short short0 = FlowingFluid.getCacheKey(blockposition1, blockposition2);
+-                Pair<BlockState, FluidState> pair = (Pair) short2objectmap.computeIfAbsent(short0, (k) -> {
+-                    BlockState iblockdata1 = world.getBlockState(blockposition2);
+                // Paper start - avoid loading chunks
+                Pair<BlockState, FluidState> pair = short2objectmap.get(short0);
+                if (pair == null) {
+                    BlockState iblockdatax = world.getTypeIfLoaded(blockposition2);
+                    if (iblockdatax == null) {
+                        continue;
+                    }
+ 
+-                    return Pair.of(iblockdata1, iblockdata1.getFluidState());
+-                });
+                    pair = Pair.of(iblockdatax, iblockdatax.getFluidState());
+                    short2objectmap.put(short0, pair);
+                }
+                // Paper end
+                 BlockState iblockdata1 = (BlockState) pair.getFirst();
+                 FluidState fluid = (FluidState) pair.getSecond();
+ 
+@@ -396,11 +405,16 @@ public abstract class FlowingFluid extends Fluid {
+             Direction enumdirection = (Direction) iterator.next();
+             BlockPos blockposition1 = pos.relative(enumdirection);
+             short short0 = FlowingFluid.getCacheKey(pos, blockposition1);
+-            Pair<BlockState, FluidState> pair = (Pair) short2objectmap.computeIfAbsent(short0, (j) -> {
+-                BlockState iblockdata1 = world.getBlockState(blockposition1);
+-
+-                return Pair.of(iblockdata1, iblockdata1.getFluidState());
+-            });
+            // Paper start
+            Pair pair = (Pair) short2objectmap.get(short0);
+            if (pair == null) {
+                BlockState iblockdatax = world.getTypeIfLoaded(blockposition1);
+                if (iblockdatax == null) continue;
+
+                pair = Pair.of(iblockdatax, iblockdatax.getFluidState());
+                short2objectmap.put(short0, pair);
+            }
+            // Paper end
+             BlockState iblockdata1 = (BlockState) pair.getFirst();
+             FluidState fluid = (FluidState) pair.getSecond();
+             FluidState fluid1 = this.getNewLiquid(world, blockposition1, iblockdata1);
--- a/patches/server/0264-Implement-an-API-for-CanPlaceOn-and-CanDestroy-NBT-v.patch
+++ b/patches/server/0264-Implement-an-API-for-CanPlaceOn-and-CanDestroy-NBT-v.patch
@ -0,0 +1,416 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
+Date: Wed, 12 Sep 2018 18:53:55 +0300
+Subject: [PATCH] Implement an API for CanPlaceOn and CanDestroy NBT values
+
+
+diff --git a/src/main/java/net/minecraft/commands/arguments/blocks/BlockStateParser.java b/src/main/java/net/minecraft/commands/arguments/blocks/BlockStateParser.java
+index 30c3b24af7efebecc21d190ab89817468bdbee22..147fc3f7648a519441eec7ef1048fd18ea595d98 100644
+--- a/src/main/java/net/minecraft/commands/arguments/blocks/BlockStateParser.java
+++ b/src/main/java/net/minecraft/commands/arguments/blocks/BlockStateParser.java
+@@ -63,7 +63,7 @@ public class BlockStateParser {
+     private final boolean forTesting;
+     private final Map<Property<?>, Comparable<?>> properties = Maps.newLinkedHashMap(); // CraftBukkit - stable
+     private final Map<String, String> vagueProperties = Maps.newHashMap();
+-    private ResourceLocation id = new ResourceLocation("");
+    private ResourceLocation id = new ResourceLocation(""); public final ResourceLocation getBlockKey() { return this.id; } // Paper - OBFHELPER
+     private StateDefinition<Block, BlockState> definition;
+     private BlockState state;
+     @Nullable
+diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+index 4ad6fd7e110f949f0bd859331ed6a5109ade3008..6252c3934d72b0d5e6809842bdd26d344cab98c6 100644
+--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+@@ -83,6 +83,12 @@ import org.bukkit.persistence.PersistentDataContainer;
+ import static org.spigotmc.ValidateUtils.*;
+ // Spigot end
+ 
+// Paper start
+import com.destroystokyo.paper.Namespaced;
+import com.destroystokyo.paper.NamespacedTag;
+import java.util.Collections;
+// Paper end
+
+ /**
+  * Children must include the following:
+  *
+@@ -267,6 +273,10 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+     @Specific(Specific.To.NBT)
+     static final ItemMetaKey BLOCK_DATA = new ItemMetaKey("BlockStateTag");
+     static final ItemMetaKey BUKKIT_CUSTOM_TAG = new ItemMetaKey("PublicBukkitValues");
+    // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+    static final ItemMetaKey CAN_DESTROY = new ItemMetaKey("CanDestroy");
+    static final ItemMetaKey CAN_PLACE_ON = new ItemMetaKey("CanPlaceOn");
+    // Paper end
+ 
+     // We store the raw original JSON representation of all text data. See SPIGOT-5063, SPIGOT-5656, SPIGOT-5304
+     private String displayName;
+@@ -280,6 +290,10 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+     private int hideFlag;
+     private boolean unbreakable;
+     private int damage;
+    // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+    private Set<Namespaced> placeableKeys = Sets.newHashSet();
+    private Set<Namespaced> destroyableKeys = Sets.newHashSet();
+    // Paper end
+ 
+     private static final Set<String> HANDLED_TAGS = Sets.newHashSet();
+     private static final CraftPersistentDataTypeRegistry DATA_TYPE_REGISTRY = new CraftPersistentDataTypeRegistry();
+@@ -317,6 +331,15 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+         this.hideFlag = meta.hideFlag;
+         this.unbreakable = meta.unbreakable;
+         this.damage = meta.damage;
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        if (meta.hasPlaceableKeys()) {
+            this.placeableKeys = new java.util.HashSet<>(meta.placeableKeys);
+        }
+
+        if (meta.hasDestroyableKeys()) {
+            this.destroyableKeys = new java.util.HashSet<>(meta.destroyableKeys);
+        }
+        // Paper end
+         this.unhandledTags.putAll(meta.unhandledTags);
+         this.persistentDataContainer.putAll(meta.persistentDataContainer.getRaw());
+ 
+@@ -380,6 +403,31 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+                 this.persistentDataContainer.put(key, compound.get(key));
+             }
+         }
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        if (tag.contains(CAN_DESTROY.NBT)) {
+            ListTag list = tag.getList(CAN_DESTROY.NBT, CraftMagicNumbers.NBT.TAG_STRING);
+            for (int i = 0; i < list.size(); i++) {
+                Namespaced namespaced = this.deserializeNamespaced(list.getString(i));
+                if (namespaced == null) {
+                    continue;
+                }
+
+                this.destroyableKeys.add(namespaced);
+            }
+        }
+
+        if (tag.contains(CAN_PLACE_ON.NBT)) {
+            ListTag list = tag.getList(CAN_PLACE_ON.NBT, CraftMagicNumbers.NBT.TAG_STRING);
+            for (int i = 0; i < list.size(); i++) {
+                Namespaced namespaced = this.deserializeNamespaced(list.getString(i));
+                if (namespaced == null) {
+                    continue;
+                }
+
+                this.placeableKeys.add(namespaced);
+            }
+        }
+        // Paper end
+ 
+         Set<String> keys = tag.getAllKeys();
+         for (String key : keys) {
+@@ -518,6 +566,34 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+             this.setDamage(damage);
+         }
+ 
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        Iterable<?> canPlaceOnSerialized = SerializableMeta.getObject(Iterable.class, map, CAN_PLACE_ON.BUKKIT, true);
+        if (canPlaceOnSerialized != null) {
+            for (Object canPlaceOnElement : canPlaceOnSerialized) {
+                String canPlaceOnRaw = (String) canPlaceOnElement;
+                Namespaced value = this.deserializeNamespaced(canPlaceOnRaw);
+                if (value == null) {
+                    continue;
+                }
+
+                this.placeableKeys.add(value);
+            }
+        }
+
+        Iterable<?> canDestroySerialized = SerializableMeta.getObject(Iterable.class, map, CAN_DESTROY.BUKKIT, true);
+        if (canDestroySerialized != null) {
+            for (Object canDestroyElement : canDestroySerialized) {
+                String canDestroyRaw = (String) canDestroyElement;
+                Namespaced value = this.deserializeNamespaced(canDestroyRaw);
+                if (value == null) {
+                    continue;
+                }
+
+                this.destroyableKeys.add(value);
+            }
+        }
+        // Paper end
+
+         String internal = SerializableMeta.getString(map, "internal", true);
+         if (internal != null) {
+             ByteArrayInputStream buf = new ByteArrayInputStream(Base64.decodeBase64(internal));
+@@ -646,6 +722,23 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+         if (this.hasDamage()) {
+             itemTag.putInt(DAMAGE.NBT, damage);
+         }
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        if (hasPlaceableKeys()) {
+            List<String> items = this.placeableKeys.stream()
+                .map(this::serializeNamespaced)
+                .collect(java.util.stream.Collectors.toList());
+
+            itemTag.put(CAN_PLACE_ON.NBT, createNonComponentStringList(items));
+        }
+
+        if (hasDestroyableKeys()) {
+            List<String> items = this.destroyableKeys.stream()
+                .map(this::serializeNamespaced)
+                .collect(java.util.stream.Collectors.toList());
+
+            itemTag.put(CAN_DESTROY.NBT, createNonComponentStringList(items));
+        }
+        // Paper end
+ 
+         for (Map.Entry<String, Tag> e : this.unhandledTags.entrySet()) {
+             itemTag.put(e.getKey(), e.getValue());
+@@ -662,6 +755,21 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+         }
+     }
+ 
+    // Paper start
+    static ListTag createNonComponentStringList(List<String> list) {
+        if (list == null || list.isEmpty()) {
+            return null;
+        }
+
+        ListTag tagList = new ListTag();
+        for (String value : list) {
+            tagList.add(StringTag.valueOf(value)); // Paper - NBTTagString.of(String str)
+        }
+
+        return tagList;
+    }
+    // Paper end
+
+     ListTag createStringList(List<String> list) {
+         if (list == null) {
+             return null;
+@@ -745,7 +853,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+ 
+     @Overridden
+     boolean isEmpty() {
+-        return !(this.hasDisplayName() || this.hasLocalizedName() || this.hasEnchants() || (this.lore != null) || this.hasCustomModelData() || this.hasBlockData() || this.hasRepairCost() || !this.unhandledTags.isEmpty() || !this.persistentDataContainer.isEmpty() || this.hideFlag != 0 || this.isUnbreakable() || this.hasDamage() || this.hasAttributeModifiers());
+        return !(this.hasDisplayName() || this.hasLocalizedName() || this.hasEnchants() || (this.lore != null) || this.hasCustomModelData() || this.hasBlockData() || this.hasRepairCost() || !this.unhandledTags.isEmpty() || !this.persistentDataContainer.isEmpty() || this.hideFlag != 0 || this.isUnbreakable() || this.hasDamage() || this.hasAttributeModifiers() || this.hasPlaceableKeys() || this.hasDestroyableKeys()); // Paper - Implement an API for CanPlaceOn and CanDestroy NBT values
+     }
+ 
+     // Paper start
+@@ -1169,7 +1277,11 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+                 && (this.hideFlag == that.hideFlag)
+                 && (this.isUnbreakable() == that.isUnbreakable())
+                 && (this.hasDamage() ? that.hasDamage() && this.damage == that.damage : !that.hasDamage())
+-                && (this.version == that.version);
+                && (this.version == that.version)
+                // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+                && (this.hasPlaceableKeys() ? that.hasPlaceableKeys() && this.placeableKeys.equals(that.placeableKeys) : !that.hasPlaceableKeys())
+                && (this.hasDestroyableKeys() ? that.hasDestroyableKeys() && this.destroyableKeys.equals(that.destroyableKeys) : !that.hasDestroyableKeys());
+                // Paper end
+     }
+ 
+     /**
+@@ -1204,6 +1316,10 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+         hash = 61 * hash + (this.hasDamage() ? this.damage : 0);
+         hash = 61 * hash + (this.hasAttributeModifiers() ? this.attributeModifiers.hashCode() : 0);
+         hash = 61 * hash + this.version;
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        hash = 61 * hash + (this.hasPlaceableKeys() ? this.placeableKeys.hashCode() : 0);
+        hash = 61 * hash + (this.hasDestroyableKeys() ? this.destroyableKeys.hashCode() : 0);
+        // Paper end
+         return hash;
+     }
+ 
+@@ -1228,6 +1344,14 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+             clone.unbreakable = this.unbreakable;
+             clone.damage = this.damage;
+             clone.version = this.version;
+            // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+            if (this.placeableKeys != null) {
+                clone.placeableKeys = Sets.newHashSet(this.placeableKeys);
+            }
+            if (this.destroyableKeys != null) {
+                clone.destroyableKeys = Sets.newHashSet(this.destroyableKeys);
+            }
+            // Paper end
+             return clone;
+         } catch (CloneNotSupportedException e) {
+             throw new Error(e);
+@@ -1285,6 +1409,23 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+             builder.put(DAMAGE.BUKKIT, damage);
+         }
+ 
+        // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+        if (this.hasPlaceableKeys()) {
+            List<String> cerealPlaceable = this.placeableKeys.stream()
+                .map(this::serializeNamespaced)
+                .collect(java.util.stream.Collectors.toList());
+
+            builder.put(CAN_PLACE_ON.BUKKIT, cerealPlaceable);
+        }
+
+        if (this.hasDestroyableKeys()) {
+            List<String> cerealDestroyable = this.destroyableKeys.stream()
+                .map(this::serializeNamespaced)
+                .collect(java.util.stream.Collectors.toList());
+
+            builder.put(CAN_DESTROY.BUKKIT, cerealDestroyable);
+        }
+        // Paper end
+         final Map<String, Tag> internalTags = new HashMap<String, Tag>(this.unhandledTags);
+         this.serializeInternal(internalTags);
+         if (!internalTags.isEmpty()) {
+@@ -1449,6 +1590,8 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+                         CraftMetaArmorStand.SHOW_ARMS.NBT,
+                         CraftMetaArmorStand.SMALL.NBT,
+                         CraftMetaArmorStand.MARKER.NBT,
+                        CAN_DESTROY.NBT,
+                        CAN_PLACE_ON.NBT,
+                         // Paper end
+                         CraftMetaCompass.LODESTONE_DIMENSION.NBT,
+                         CraftMetaCompass.LODESTONE_POS.NBT,
+@@ -1477,4 +1620,147 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+     }
+     // Paper end
+ 
+    // Paper start - Implement an API for CanPlaceOn and CanDestroy NBT values
+    @Override
+    @SuppressWarnings("deprecation")
+    public Set<Material> getCanDestroy() {
+        return !hasDestroyableKeys() ? Collections.emptySet() : legacyGetMatsFromKeys(this.destroyableKeys);
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public void setCanDestroy(Set<Material> canDestroy) {
+        Validate.notNull(canDestroy, "Cannot replace with null set!");
+        legacyClearAndReplaceKeys(this.destroyableKeys, canDestroy);
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public Set<Material> getCanPlaceOn() {
+        return !hasPlaceableKeys() ? Collections.emptySet() : legacyGetMatsFromKeys(this.placeableKeys);
+    }
+
+    @Override
+    @SuppressWarnings("deprecation")
+    public void setCanPlaceOn(Set<Material> canPlaceOn) {
+        Validate.notNull(canPlaceOn, "Cannot replace with null set!");
+        legacyClearAndReplaceKeys(this.placeableKeys, canPlaceOn);
+    }
+
+    @Override
+    public Set<Namespaced> getDestroyableKeys() {
+        return !hasDestroyableKeys() ? Collections.emptySet() : Sets.newHashSet(this.destroyableKeys);
+    }
+
+    @Override
+    public void setDestroyableKeys(Collection<Namespaced> canDestroy) {
+        Validate.notNull(canDestroy, "Cannot replace with null collection!");
+        Validate.isTrue(ofAcceptableType(canDestroy), "Can only use NamespacedKey or NamespacedTag objects!");
+        this.destroyableKeys.clear();
+        this.destroyableKeys.addAll(canDestroy);
+    }
+
+    @Override
+    public Set<Namespaced> getPlaceableKeys() {
+        return !hasPlaceableKeys() ? Collections.emptySet() : Sets.newHashSet(this.placeableKeys);
+    }
+
+    @Override
+    public void setPlaceableKeys(Collection<Namespaced> canPlaceOn) {
+        Validate.notNull(canPlaceOn, "Cannot replace with null collection!");
+        Validate.isTrue(ofAcceptableType(canPlaceOn), "Can only use NamespacedKey or NamespacedTag objects!");
+        this.placeableKeys.clear();
+        this.placeableKeys.addAll(canPlaceOn);
+    }
+
+    @Override
+    public boolean hasPlaceableKeys() {
+        return this.placeableKeys != null && !this.placeableKeys.isEmpty();
+    }
+
+    @Override
+    public boolean hasDestroyableKeys() {
+        return this.destroyableKeys != null && !this.destroyableKeys.isEmpty();
+    }
+
+    @Deprecated
+    private void legacyClearAndReplaceKeys(Collection<Namespaced> toUpdate, Collection<Material> beingSet) {
+        if (beingSet.stream().anyMatch(Material::isLegacy)) {
+            throw new IllegalArgumentException("Set must not contain any legacy materials!");
+        }
+
+        toUpdate.clear();
+        toUpdate.addAll(beingSet.stream().map(Material::getKey).collect(java.util.stream.Collectors.toSet()));
+    }
+
+    @Deprecated
+    private Set<Material> legacyGetMatsFromKeys(Collection<Namespaced> names) {
+        Set<Material> mats = Sets.newHashSet();
+        for (Namespaced key : names) {
+            if (!(key instanceof org.bukkit.NamespacedKey)) {
+                continue;
+            }
+
+            Material material = Material.matchMaterial(key.toString(), false);
+            if (material != null) {
+                mats.add(material);
+            }
+        }
+
+        return mats;
+    }
+
+    private @Nullable Namespaced deserializeNamespaced(String raw) {
+        boolean isTag = raw.length() > 0 && raw.codePointAt(0) == '#';
+        net.minecraft.commands.arguments.blocks.BlockStateParser blockParser = new net.minecraft.commands.arguments.blocks.BlockStateParser(new com.mojang.brigadier.StringReader(raw), true);
+        try {
+            blockParser = blockParser.parse(false);
+        } catch (com.mojang.brigadier.exceptions.CommandSyntaxException e) {
+            e.printStackTrace();
+            return null;
+        }
+
+        net.minecraft.resources.ResourceLocation key;
+        if (isTag) {
+            key = blockParser.getTag();
+        } else {
+            key = blockParser.getBlockKey();
+        }
+
+        if (key == null) {
+            return null;
+        }
+
+        // don't DC the player if something slips through somehow
+        Namespaced resource = null;
+        try {
+            if (isTag) {
+                resource = new NamespacedTag(key.getNamespace(), key.getPath());
+            } else {
+                resource = CraftNamespacedKey.fromMinecraft(key);
+            }
+        } catch (IllegalArgumentException ex) {
+            org.bukkit.Bukkit.getLogger().warning("Namespaced resource does not validate: " + key.toString());
+            ex.printStackTrace();
+        }
+
+        return resource;
+    }
+
+    private @Nonnull String serializeNamespaced(Namespaced resource) {
+        return resource.toString();
+    }
+
+    // not a fan of this
+    private boolean ofAcceptableType(Collection<Namespaced> namespacedResources) {
+        
+        for (Namespaced resource : namespacedResources) {
+            if (!(resource instanceof org.bukkit.NamespacedKey || resource instanceof com.destroystokyo.paper.NamespacedTag)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+    // Paper end
+ }
--- a/patches/server/0265-Prevent-Mob-AI-Rules-from-Loading-Chunks.patch
+++ b/patches/server/0265-Prevent-Mob-AI-Rules-from-Loading-Chunks.patch
@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Mon, 10 Sep 2018 23:56:36 -0400
+Subject: [PATCH] Prevent Mob AI Rules from Loading Chunks
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/RemoveBlockGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/RemoveBlockGoal.java
+index b255eed15cfc7282167a9bed01653b34bb8d13f1..ac5779319081a6894373877067edf958da8a9cf5 100644
+--- a/src/main/java/net/minecraft/world/entity/ai/goal/RemoveBlockGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/RemoveBlockGoal.java
+@@ -133,7 +133,9 @@ public class RemoveBlockGoal extends MoveToBlockGoal {
+ 
+     @Nullable
+     private BlockPos getPosWithBlock(BlockPos pos, BlockGetter world) {
+-        if (world.getBlockState(pos).is(this.blockToRemove)) {
+        net.minecraft.world.level.block.state.BlockState block = world.getTypeIfLoaded(pos); // Paper
+        if (block == null) return null; // Paper
+        if (block.is(this.blockToRemove)) { // Paper
+             return pos;
+         } else {
+             BlockPos[] ablockposition = new BlockPos[]{pos.below(), pos.west(), pos.east(), pos.north(), pos.south(), pos.below().below()};
+@@ -143,7 +145,8 @@ public class RemoveBlockGoal extends MoveToBlockGoal {
+             for (int j = 0; j < i; ++j) {
+                 BlockPos blockposition1 = ablockposition1[j];
+ 
+-                if (world.getBlockState(blockposition1).is(this.blockToRemove)) {
+                net.minecraft.world.level.block.state.BlockState block2 = world.getTypeIfLoaded(blockposition1); // Paper
+                if (block2 != null && block2.is(this.blockToRemove)) { // Paper
+                     return blockposition1;
+                 }
+             }
+@@ -154,7 +157,7 @@ public class RemoveBlockGoal extends MoveToBlockGoal {
+ 
+     @Override
+     protected boolean isValidTarget(LevelReader world, BlockPos pos) {
+-        ChunkAccess ichunkaccess = world.getChunk(SectionPos.blockToSectionCoord(pos.getX()), SectionPos.blockToSectionCoord(pos.getZ()), ChunkStatus.FULL, false);
+        ChunkAccess ichunkaccess = world.getChunkIfLoadedImmediately(pos.getX() >> 4, pos.getZ() >> 4); // Paper
+ 
+         return ichunkaccess == null ? false : ichunkaccess.getBlockState(pos).is(this.blockToRemove) && ichunkaccess.getBlockState(pos.above()).isAir() && ichunkaccess.getBlockState(pos.above(2)).isAir();
+     }
--- a/patches/server/0266-Prevent-mob-spawning-from-loading-generating-chunks.patch
+++ b/patches/server/0266-Prevent-mob-spawning-from-loading-generating-chunks.patch
@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 12 Sep 2018 21:12:57 -0400
+Subject: [PATCH] Prevent mob spawning from loading/generating chunks
+
+also prevents if out of world border bounds
+
+diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+index 9c079d32e81cabfa7b8b28e3e8d5741d8d951d79..30ba1e3cb75d994770b006b9dfd6669000a9c1a4 100644
+--- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+@@ -188,9 +188,9 @@ public final class NaturalSpawner {
+         StructureFeatureManager structuremanager = world.structureFeatureManager();
+         ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator();
+         int i = pos.getY();
+-        BlockState iblockdata = chunk.getBlockState(pos);
+        BlockState iblockdata = world.getTypeIfLoadedAndInBounds(pos); // Paper - don't load chunks for mob spawn
+ 
+-        if (!iblockdata.isRedstoneConductor(chunk, pos)) {
+        if (iblockdata != null && !iblockdata.isRedstoneConductor(chunk, pos)) { // Paper - don't load chunks for mob spawn
+             BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos();
+             int j = 0;
+             int k = 0;
+@@ -219,7 +219,7 @@ public final class NaturalSpawner {
+                             if (entityhuman != null) {
+                                 double d2 = entityhuman.distanceToSqr(d0, (double) i, d1);
+ 
+-                                if (NaturalSpawner.isRightDistanceToPlayerAndSpawnPoint(world, chunk, blockposition_mutableblockposition, d2)) {
+                                if (world.isLoadedAndInBounds(blockposition_mutableblockposition) && NaturalSpawner.isRightDistanceToPlayerAndSpawnPoint(world, chunk, blockposition_mutableblockposition, d2)) { // Paper - don't load chunks for mob spawn
+                                     if (biomesettingsmobs_c == null) {
+                                         Optional<MobSpawnSettings.SpawnerData> optional = NaturalSpawner.getRandomSpawnMobAt(world, structuremanager, chunkgenerator, group, world.random, (BlockPos) blockposition_mutableblockposition);
+