DataWatcher

[AlexSoсol]

Доброго времени суток о/

Такой вопрос, пытался сохранить в DataWatcher энтити свой стак чтобы в нужный момент использовать. Правда делал я это немного не из самого энтити, потому сделал "обёртку" для получения DataWatcher'а через рефлексию (getField.setAccessible.getValue) (не хочу ради одного этого возиться с AT).

Спойлер: Сделал вот так добавление, задание и получение стака:

private static final int stackID = 21;
public static void addStackToTrack(EntityManaBurst entity) {
    getEntityDataWatcher(entity).addObject(stackID, new ItemStack(Blocks.stone, 0, 0));
}
  
public static void setTrackingStack(EntityManaBurst entity, ItemStack stack) {
    getEntityDataWatcher(entity).updateObject(stackID, stack == null ? new ItemStack(Blocks.stone, 0, 0) : stack);
}
  
public static ItemStack getTrackingStack(EntityManaBurst entity) {
    return getEntityDataWatcher(entity).getWatchableObjectItemStack(stackID);
}

Краша не возникает (прошёлся пошагово в дебаге). Но вот при спауне (?) игра вылетает (хоть и не окончательно, лишь локальный сервер падает):

Спойлер: Лог консоли (крашрепорта нет)

[Client thread/ERROR] [FML]: A severe problem occurred during the spawning of an entity at ( -9.5,84.5, -29.5)
java.lang.NullPointerException
    at net.minecraft.entity.DataWatcher.updateWatchedObjectsFromList(DataWatcher.java:360) ~[DataWatcher.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:110) [EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) [EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) [EntitySpawnHandler.class:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) [SimpleChannelInboundHandler.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) [PlayerControllerMP.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_162]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
    at GradleStart.main(Unknown Source) [start/:?]
[Client thread/ERROR] [FML]: EntitySpawnHandler exception
java.lang.NullPointerException
    at net.minecraft.entity.DataWatcher.updateWatchedObjectsFromList(DataWatcher.java:360) ~[DataWatcher.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:110) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) ~[EntitySpawnHandler.class:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) [PlayerControllerMP.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_162]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
    at GradleStart.main(Unknown Source) [start/:?]
[Client thread/ERROR] [FML]: OpenGuiHandler exception
java.lang.NullPointerException
    at net.minecraft.entity.DataWatcher.updateWatchedObjectsFromList(DataWatcher.java:360) ~[DataWatcher.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:110) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) ~[EntitySpawnHandler.class:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) [PlayerControllerMP.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_162]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
    at GradleStart.main(Unknown Source) [start/:?]
[Client thread/ERROR] [FML]: HandshakeCompletionHandler exception
java.lang.NullPointerException
    at net.minecraft.entity.DataWatcher.updateWatchedObjectsFromList(DataWatcher.java:360) ~[DataWatcher.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:110) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) ~[EntitySpawnHandler.class:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) [PlayerControllerMP.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_162]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
    at GradleStart.main(Unknown Source) [start/:?]
[Client thread/ERROR] [FML]: There was a critical exception handling a packet on channel FML
java.lang.NullPointerException
    at net.minecraft.entity.DataWatcher.updateWatchedObjectsFromList(DataWatcher.java:360) ~[DataWatcher.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.spawnEntity(EntitySpawnHandler.java:110) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:34) ~[EntitySpawnHandler.class:?]
    at cpw.mods.fml.common.network.internal.EntitySpawnHandler.channelRead0(EntitySpawnHandler.java:28) ~[EntitySpawnHandler.class:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) ~[DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) ~[EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) [PlayerControllerMP.class:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_162]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_162]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
    at GradleStart.main(Unknown Source) [start/:?]

Я чего-то забыл или ... ? В общем, подскажите, в чём проблема)
Заранее спасибо о/

 

[ロロロ]

А почему new ItemStack(Blocks.stone, 0, 0)?
Мета то, нормально, но кол-во 0.
Мб из-за него.

 

[AlexSoсol]

но кол-во 0

Чтобы не вынуть оттуда камень. Blocks.air вряд-ли покатит.
Код внаглую стырен легально (на правах аддона) позаимствован у Вазки. Раз у него работает - почему у меня не должно?

UPD: только что проверил с 1. Всё равно краш.

 

[fewizz]

Потомучт на клиенте по такому id в датаватчере нет ничего?

 

[Dahaka]

В entityInit "зарегал" айдишник?
Кусок ванильного кода

    @Override
    protected void entityInit() {
        super.entityInit();
        dataWatcher.addObject(11, Byte.valueOf((byte) 0));
        dataWatcher.addObject(10, "");
    }

 

[AlexSoсol]

Агась. Проблема была в том, что я туда незарегистрированный предмет пихал :D
Проблема решается добавлением его в GameRegistry