Upstream/Paper
1
0
Fork 0
mirror of https://github.com/PaperMC/Paper.git synced 2024-12-28 03:48:01 +01:00
Code Issues Projects Releases Wiki Activity
4601dc901b
Paper/patches/server/0343-Fix-item-duplication-and-teleport-issues.patch
Nassim Jahnke c60e47fa58
More more work
2024-12-03 19:28:24 +01:00

156 lines
10 KiB
Diff
Raw Blame History

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