From 3319f24b69ed6fac4f653727251bea9fbe11d8b1 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 e2dd95b..ff7b406 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 ec03572..a349f19 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); -- 2.9.3