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Paper/Spigot-Server-Patches/0449-Ensure-Entity-is-never-double-registered.patch
Aikar 57dd397155
Updated Upstream (Bukkit/CraftBukkit)
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:
b999860d SPIGOT-2304: Add LootGenerateEvent

CraftBukkit Changes:
77fd87e4 SPIGOT-2304: Implement LootGenerateEvent
a1a705ee SPIGOT-5566: Doused campfires & fires should call EntityChangeBlockEvent
41712edd SPIGOT-5707: PersistentDataHolder not Persistent on API dropped Item
2020-05-01 18:03:57 -04:00

83 Zeilen
3.6 KiB
Diff

From ff553a44163ebec14ee14149ece19c35bcbe6bca Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 29 Mar 2020 18:26:14 -0400
Subject: [PATCH] Ensure Entity is never double registered
If something calls register twice, and the world is ticking, it could be
enqueued to add twice.
Vs behavior of non ticking of just overwriting state.
We will now simply log a warning when this happens instead of crashing the server.
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 00df89d650..0dbe2dce11 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -59,6 +59,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
}
// Paper start
+ boolean isQueuedForRegister = false;
public static Random SHARED_RANDOM = new Random() {
private boolean locked = false;
@Override
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 9b9e242432..f80c80957a 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -532,6 +532,7 @@ public class WorldServer extends World {
try (co.aikar.timings.Timing ignored = this.timings.newEntities.startTiming()) { // Paper - timings
while ((entity = (Entity) this.entitiesToAdd.poll()) != null) {
+ if (!entity.isQueuedForRegister) continue; // Paper - ignore cancelled registers
this.registerEntity(entity);
}
} // Paper - timings
@@ -1354,6 +1355,19 @@ public class WorldServer extends World {
public void unregisterEntity(Entity entity) {
org.spigotmc.AsyncCatcher.catchOp("entity unregister"); // Spigot
+ // Paper start - fix entity registration issues
+ if (entity instanceof EntityComplexPart) {
+ // Usually this is a no-op for complex parts, and ID's should be removed, but go ahead and remove it anyways
+ // Dragon parts are handled special in register. they don't receive a valid = true or register by UUID etc.
+ this.entitiesById.remove(entity.getId(), entity);
+ return;
+ }
+ if (!entity.valid) {
+ // Someone called remove before we ever got added, cancel the add.
+ entity.isQueuedForRegister = false;
+ return;
+ }
+ // Paper end
// Spigot start
if ( entity instanceof EntityHuman )
{
@@ -1415,9 +1429,21 @@ public class WorldServer extends World {
private void registerEntity(Entity entity) {
org.spigotmc.AsyncCatcher.catchOp("entity register"); // Spigot
+ // Paper start - don't double enqueue entity registration
+ //noinspection ObjectEquality
+ if (this.entitiesById.get(entity.getId()) == entity) {
+ LOGGER.error(entity + " was already registered!");
+ new Throwable().printStackTrace();
+ return;
+ }
+ // Paper end
if (this.tickingEntities) {
- this.entitiesToAdd.add(entity);
+ if (!entity.isQueuedForRegister) { // Paper
+ this.entitiesToAdd.add(entity);
+ entity.isQueuedForRegister = true; // Paper
+ }
} else {
+ entity.isQueuedForRegister = false; // Paper
this.entitiesById.put(entity.getId(), entity);
if (entity instanceof EntityEnderDragon) {
EntityComplexPart[] aentitycomplexpart = ((EntityEnderDragon) entity).eo();
--
2.26.2