From 8ed79f772341407250572ea3a08b13d46bafab63 Mon Sep 17 00:00:00 2001 From: Aikar Date: Tue, 21 Jun 2016 22:54:34 -0400 Subject: [PATCH] Fix Double World Add issues Vanilla will double add Spider Jockeys to the world, so ignore already added. Also add debug if something else tries to, and abort before world gets bad state diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java index 310ab96ab..19411212a 100644 --- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java +++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java @@ -525,7 +525,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver { } public static void a(Entity entity, World world, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) { - if (world.addEntity(entity, reason) && entity.isVehicle()) { + if (!entity.valid && world.addEntity(entity, reason) && entity.isVehicle()) { // Paper // CraftBukkit end Iterator iterator = entity.bx().iterator(); diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index 7ed3a0677..7900fca57 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -1098,6 +1098,7 @@ public abstract class World implements IBlockAccess { public boolean addEntity(Entity entity, SpawnReason spawnReason) { // Changed signature, added SpawnReason org.spigotmc.AsyncCatcher.catchOp( "entity add"); // Spigot if (entity == null) return false; + if (entity.valid) { MinecraftServer.LOGGER.error("Attempted Double World add on " + entity, new Throwable()); return true; } // Paper // CraftBukkit end int i = MathHelper.floor(entity.locX / 16.0D); int j = MathHelper.floor(entity.locZ / 16.0D); -- 2.12.2