PaperMC/Spigot-Server-Patches/0423-Prevent-Double-PlayerChunkMap-adds-crashing-server.patch
Shane Freeder 0ea3083817
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appear 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:
1e843b72 #510: Add NamespacedKey#fromString() to fetch from user input
a4d18241 #581: Add methods to modify despawn delay for wandering villagers

CraftBukkit Changes:
0cd8f19f #802: Add methods to modify despawn delay for wandering villagers
d5c5d998 SPIGOT-6362: ConcurrentModificationException: null --> Server Crash
8c7d69fe SPIGOT-5228: Entities that are removed during chunk unloads are not properly removed from the chunk.
2021-02-16 17:13:49 +00:00

48 lines
2.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 2 Apr 2020 01:42:39 -0400
Subject: [PATCH] Prevent Double PlayerChunkMap adds crashing server
Suspected case would be around the technique used in .stopRiding
Stack will identify any causer of this and warn instead of crashing.
diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index 74df45e6c3f86736f7d136cf6fd911d5b574221d..21dfbbdbe72a7562601e23384e2fec8f9393ef29 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -1446,6 +1446,14 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
protected void addEntity(Entity entity) {
org.spigotmc.AsyncCatcher.catchOp("entity track"); // Spigot
+ // Paper start - ignore and warn about illegal addEntity calls instead of crashing server
+ if (!entity.valid || entity.world != this.world || this.trackedEntities.containsKey(entity.getId())) {
+ new Throwable("[ERROR] Illegal PlayerChunkMap::addEntity for world " + this.world.getWorld().getName()
+ + ": " + entity + (this.trackedEntities.containsKey(entity.getId()) ? " ALREADY CONTAINED (This would have crashed your server)" : ""))
+ .printStackTrace();
+ return;
+ }
+ // Paper end
if (!(entity instanceof EntityComplexPart)) {
EntityTypes<?> entitytypes = entity.getEntityType();
int i = entitytypes.getChunkRange() * 16;
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 0543f5f30340e367511ec282ea67b611168c6000..d018cbee11356110aace897b1dd4516dd3ca5b61 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1417,7 +1417,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
}
}
- this.getChunkProvider().addEntity(entity);
+ // this.getChunkProvider().addEntity(entity); // Paper - moved down below valid=true
// CraftBukkit start - SPIGOT-5278
if (entity instanceof EntityDrowned) {
this.navigators.add(((EntityDrowned) entity).navigationWater);
@@ -1428,6 +1428,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
this.navigators.add(((EntityInsentient) entity).getNavigation());
}
entity.valid = true; // CraftBukkit
+ this.getChunkProvider().addEntity(entity); // Paper - from above to be below valid=true
// Paper start - Set origin location when the entity is being added to the world
if (entity.origin == null) {
entity.origin = entity.getBukkitEntity().getLocation();