mirror of
https://github.com/PaperMC/Paper.git
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155 lines
10 KiB
Diff
155 lines
10 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 25 Apr 2020 06:46:35 -0400
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Subject: [PATCH] Fix item duplication and teleport issues
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This notably fixes the newest "Donkey Dupe", but also fixes a lot
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of dupe bugs in general around nether portals and entity world transfer
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We also fix item duplication generically by anytime we clone an item
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to drop it on the ground, destroy the source item.
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This avoid an itemstack ever existing twice in the world state pre
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clean up stage.
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So even if something NEW comes up, it would be impossible to drop the
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same item twice because the source was destroyed.
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index e5c280df931fc712e41f4decfeb2871b870d2e4a..15d084e983e8cdfd00dda7fcc2d3c6fac9317cf2 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -2656,11 +2656,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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} else {
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// CraftBukkit start - Capture drops for death event
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if (this instanceof net.minecraft.world.entity.LivingEntity && !((net.minecraft.world.entity.LivingEntity) this).forceDrops) {
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- ((net.minecraft.world.entity.LivingEntity) this).drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(stack));
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+ ((net.minecraft.world.entity.LivingEntity) this).drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(stack)); // Paper - mirror so we can destroy it later
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return null;
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}
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// CraftBukkit end
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- ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack);
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+ ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack.copy()); // Paper - copy so we can destroy original
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+ stack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
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entityitem.setDefaultPickUpDelay();
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// CraftBukkit start
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@@ -3493,6 +3494,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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public Entity teleport(TeleportTransition teleportTarget) {
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Level world = this.level();
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+ // Paper start - Fix item duplication and teleport issues
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+ if ((!this.isAlive() || !this.valid) && (teleportTarget.newLevel() != world)) {
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+ LOGGER.warn("Illegal Entity Teleport " + this + " to " + teleportTarget.newLevel() + ":" + teleportTarget.position(), new Throwable());
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+ return null;
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+ }
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+ // Paper end - Fix item duplication and teleport issues
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if (world instanceof ServerLevel worldserver) {
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if (!this.isRemoved()) {
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// CraftBukkit start
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@@ -3581,6 +3588,11 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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gameprofilerfiller.pop();
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return null;
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} else {
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+ // Paper start - Fix item duplication and teleport issues
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+ if (this instanceof Leashable leashable) {
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+ leashable.dropLeash(true, true); // Paper drop lead
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+ }
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+ // Paper end - Fix item duplication and teleport issues
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entity.restoreFrom(this);
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this.removeAfterChangingDimensions();
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// CraftBukkit start - Forward the CraftEntity to the new entity
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@@ -3693,6 +3705,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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}
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public boolean canTeleport(Level from, Level to) {
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+ if (!this.isAlive() || !this.valid) return false; // Paper - Fix item duplication and teleport issues
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if (from.dimension() == Level.END && to.dimension() == Level.OVERWORLD) {
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Iterator iterator = this.getPassengers().iterator();
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 52a1581a301a3aa481b4fe4afc978b0e426e814b..9a4bcbfde22ea3c7761099152db8f793c01aedb5 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -1776,9 +1776,9 @@ public abstract class LivingEntity extends Entity implements Attackable {
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// Paper start
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org.bukkit.event.entity.EntityDeathEvent deathEvent = this.dropAllDeathLoot(worldserver, damageSource);
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if (deathEvent == null || !deathEvent.isCancelled()) {
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- if (entityliving != null) {
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- entityliving.awardKillScore(this, damageSource);
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- }
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+ //if (entityliving != null) { // Paper - Fix item duplication and teleport issues; moved to be run earlier in #dropAllDeathLoot before destroying the drop items in CraftEventFactory#callEntityDeathEvent
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+ // entityliving.awardKillScore(this, damageSource);
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+ //}
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// Paper start - clear equipment if event is not cancelled
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if (this instanceof Mob) {
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for (EquipmentSlot slot : this.clearedEquipmentSlots) {
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@@ -1872,8 +1872,13 @@ public abstract class LivingEntity extends Entity implements Attackable {
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this.dropCustomDeathLoot(world, damageSource, flag);
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this.clearEquipmentSlots = prev; // Paper
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}
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- // CraftBukkit start - Call death event
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- org.bukkit.event.entity.EntityDeathEvent deathEvent = CraftEventFactory.callEntityDeathEvent(this, damageSource, this.drops); // Paper
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+ // CraftBukkit start - Call death event // Paper start - call advancement triggers with correct entity equipment
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+ org.bukkit.event.entity.EntityDeathEvent deathEvent = CraftEventFactory.callEntityDeathEvent(this, damageSource, this.drops, () -> {
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+ final LivingEntity entityliving = this.getKillCredit();
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+ if (this.deathScore >= 0 && entityliving != null) {
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+ entityliving.awardKillScore(this, this.deathScore, damageSource);
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+ }
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+ }); // Paper end
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this.postDeathDropItems(deathEvent); // Paper
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this.drops = new ArrayList<>();
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// CraftBukkit end
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diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
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index e20565cf256aacd012a1722c5ebbf9016bc82e42..59fbfe8de2dc5ec020dd61a5e446b0b6f67d76e4 100644
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--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
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+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
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@@ -633,7 +633,7 @@ public class ArmorStand extends LivingEntity {
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for (i = 0; i < this.handItems.size(); ++i) {
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itemstack = (ItemStack) this.handItems.get(i);
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if (!itemstack.isEmpty()) {
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- this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack)); // CraftBukkit - add to drops
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+ this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack)); // CraftBukkit - add to drops // Paper - mirror so we can destroy it later - though this call site was safe
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this.handItems.set(i, ItemStack.EMPTY);
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}
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}
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@@ -641,7 +641,7 @@ public class ArmorStand extends LivingEntity {
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for (i = 0; i < this.armorItems.size(); ++i) {
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itemstack = (ItemStack) this.armorItems.get(i);
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if (!itemstack.isEmpty()) {
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- this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack)); // CraftBukkit - add to drops
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+ this.drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack)); // CraftBukkit - add to drops // Paper - mirror so we can destroy it later - though this call site was safe
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this.armorItems.set(i, ItemStack.EMPTY);
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}
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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index 74f33aeb6193080446ebbcc5242d95c3b1c97823..f482fc14e171129f9fa60113b1223b2db79ec6ec 100644
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--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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@@ -903,6 +903,11 @@ public class CraftEventFactory {
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}
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public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, DamageSource damageSource, List<org.bukkit.inventory.ItemStack> drops) {
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+ // Paper start
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+ return CraftEventFactory.callEntityDeathEvent(victim, damageSource, drops, com.google.common.util.concurrent.Runnables.doNothing());
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+ }
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+ public static EntityDeathEvent callEntityDeathEvent(net.minecraft.world.entity.LivingEntity victim, DamageSource damageSource, List<org.bukkit.inventory.ItemStack> drops, Runnable lootCheck) {
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+ // Paper end
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CraftLivingEntity entity = (CraftLivingEntity) victim.getBukkitEntity();
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CraftDamageSource bukkitDamageSource = new CraftDamageSource(damageSource);
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CraftWorld world = (CraftWorld) entity.getWorld();
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@@ -917,11 +922,13 @@ public class CraftEventFactory {
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playDeathSound(victim, event);
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// Paper end
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victim.expToDrop = event.getDroppedExp();
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+ lootCheck.run(); // Paper - advancement triggers before destroying items
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for (org.bukkit.inventory.ItemStack stack : event.getDrops()) {
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if (stack == null || stack.getType() == Material.AIR || stack.getAmount() == 0) continue;
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- world.dropItem(entity.getLocation(), stack);
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+ world.dropItem(entity.getLocation(), stack); // Paper - note: dropItem already clones due to this being bukkit -> NMS
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+ if (stack instanceof CraftItemStack) stack.setAmount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe, but don't nuke bukkit stacks of manually added items
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}
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return event;
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