PaperMC/Spigot-Server-Patches/0469-Fix-numerous-item-duplication-issues-and-teleport-is.patch
Aikar b3f265d1b1
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
0ca45a21 #503: Add PlayerHarvestBlockEvent
dfa80a52 SPIGOT-5930: Add PlayerRespawnEvent#isAnchorSpawn

CraftBukkit Changes:
145921e2 #676: Add PlayerHarvestBlockEvent
47abffa2 SPIGOT-5929: Angered zombified piglins do not inherit killed_by_player status
7f6b4f58 SPIGOT-5930: Add PlayerRespawnEvent#isAnchorSpawn
94eff632 SPIGOT-5867, MC-193339: NPE during shutdown when rcon enabled with no password
068618eb SPIGOT-5927: Some items NBT data disappears

Spigot Changes:
beb7d47c Rebuild patches

Fixes #3738
2020-07-03 02:19:33 -04:00

103 lines
6.2 KiB
Diff

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 numerous item duplication issues 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/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index f31f4fdecc824b27afefc79d1791a293227cbc9c..449a687399f38d3ef79685ff80531cf1212f054a 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1910,11 +1910,12 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
} else {
// CraftBukkit start - Capture drops for death event
if (this instanceof EntityLiving && !((EntityLiving) this).forceDrops) {
- ((EntityLiving) this).drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack));
+ ((EntityLiving) this).drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack)); // Paper - mirror so we can destroy it later
return null;
}
// CraftBukkit end
- EntityItem entityitem = new EntityItem(this.world, this.locX(), this.locY() + (double) f, this.locZ(), itemstack);
+ EntityItem entityitem = new EntityItem(this.world, this.locX(), this.locY() + (double) f, this.locZ(), itemstack.cloneItemStack()); // Paper - clone so we can destroy original
+ itemstack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
entityitem.defaultPickupDelay();
// CraftBukkit start
@@ -2565,6 +2566,12 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
@Nullable
public Entity teleportTo(WorldServer worldserver, BlockPosition location) {
// CraftBukkit end
+ // Paper start - fix bad state entities causing dupes
+ if (!isAlive() || !valid) {
+ LOGGER.warn("Illegal Entity Teleport " + this + " to " + worldserver + ":" + location, new Throwable());
+ return null;
+ }
+ // Paper end
if (this.world instanceof WorldServer && !this.dead) {
this.world.getMethodProfiler().enter("changeDimension");
// CraftBukkit start
@@ -2668,7 +2675,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
entity.bukkitEntity = this.getBukkitEntity();
if (this instanceof EntityInsentient) {
- ((EntityInsentient)this).unleash(true, false); // Unleash to prevent duping of leads.
+ ((EntityInsentient)this).unleash(true, true); // Paper drop lead
}
// CraftBukkit end
}
@@ -2689,7 +2696,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
}
public boolean canPortal() {
- return true;
+ return isAlive() && valid; // Paper
}
public float a(Explosion explosion, IBlockAccess iblockaccess, BlockPosition blockposition, IBlockData iblockdata, Fluid fluid, float f) {
diff --git a/src/main/java/net/minecraft/server/EntityArmorStand.java b/src/main/java/net/minecraft/server/EntityArmorStand.java
index 51e9f4a6e09474a7489d2872a800308ee3f02e46..250bccee4a27801b41c50d59e93396c696ab6974 100644
--- a/src/main/java/net/minecraft/server/EntityArmorStand.java
+++ b/src/main/java/net/minecraft/server/EntityArmorStand.java
@@ -557,7 +557,7 @@ public class EntityArmorStand extends EntityLiving {
for (i = 0; i < this.handItems.size(); ++i) {
itemstack = (ItemStack) this.handItems.get(i);
if (!itemstack.isEmpty()) {
- drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack)); // CraftBukkit - add to drops
+ 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.b);
}
}
@@ -565,7 +565,7 @@ public class EntityArmorStand extends EntityLiving {
for (i = 0; i < this.armorItems.size(); ++i) {
itemstack = (ItemStack) this.armorItems.get(i);
if (!itemstack.isEmpty()) {
- drops.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(itemstack)); // CraftBukkit - add to drops
+ 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.b);
}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 36afa821dc5f04d77b6f44fe7282444ec6a7b842..6c5036b23a41769167fd53b8cc5454e5e747598e 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -803,7 +803,8 @@ public class CraftEventFactory {
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;