From b2b83ce857f36558201df4545b39d92511d9dc85 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 eb36e1f..3a46a0a 100644 --- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java +++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java @@ -523,7 +523,7 @@ 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 1d47a11..f7d9a7c 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -1039,6 +1039,7 @@ 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); -- 2.9.2.windows.1