itemstack conversion throwing exception

[MWHunter]

[13:41:26] [Netty Epoll Server IO #3/WARN]: java.lang.reflect.InvocationTargetException [13:41:26] [Netty Epoll Server IO #3/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [13:41:26] [Netty Epoll Server IO #3/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [13:41:26] [Netty Epoll Server IO #3/WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [13:41:26] [Netty Epoll Server IO #3/WARN]: at java.lang.reflect.Method.invoke(Method.java:498) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.io.github.retrooper.packetevents.util.SpigotReflectionUtil.writeNMSItemStackPacketDataSerializer(SpigotReflectionUtil.java:631) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.io.github.retrooper.packetevents.util.SpigotReflectionUtil.decodeBukkitItemStack(SpigotReflectionUtil.java:516) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.io.github.retrooper.packetevents.util.SpigotConversionUtil.fromBukkitItemStack(SpigotConversionUtil.java:106) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.utils.latency.CompensatedInventory.getBoots(CompensatedInventory.java:105) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.predictionengine.MovementCheckRunner.check(MovementCheckRunner.java:443) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.predictionengine.MovementCheckRunner.processAndCheckMovementPacket(MovementCheckRunner.java:70) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.checks.impl.movement.PredictionRunner.onPositionUpdate(PredictionRunner.java:15) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.manager.CheckManager.lambda$onPositionUpdate$4(CheckManager.java:174) [13:41:26] [Netty Epoll Server IO #3/WARN]: at com.google.common.collect.ImmutableList.forEach(:408) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.manager.CheckManager.onPositionUpdate(CheckManager.java:174) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.events.packets.CheckManagerListener.handleFlying(CheckManagerListener.java:641) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.events.packets.CheckManagerListener.onPacketReceive(CheckManagerListener.java:348) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.com.github.retrooper.packetevents.event.PacketReceiveEvent.call(PacketReceiveEvent.java:45) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.com.github.retrooper.packetevents.event.EventManager.callEvent(EventManager.java:51) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.com.github.retrooper.packetevents.util.PacketEventsImplHelper.handleServerBoundPacket(PacketEventsImplHelper.java:81) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.io.github.retrooper.packetevents.injector.handlers.PacketEventsDecoder.read(PacketEventsDecoder.java:67) [13:41:26] [Netty Epoll Server IO #3/WARN]: at ac.grim.grimac.shaded.io.github.retrooper.packetevents.injector.handlers.PacketEventsDecoder.decode(PacketEventsDecoder.java:89) [13:41:26] [Netty Epoll Server IO #3/WARN]: at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source) [13:41:26] [Netty Epoll Server IO #3/WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [13:41:26] [Netty Epoll Server IO #3/WARN]: at java.lang.reflect.Method.invoke(Method.java:498) [13:41:26] [Netty Epoll Server IO #3/WARN]: at com.viaversion.viaversion.util.PipelineUtil.callDecode(PipelineUtil.java:75) [13:41:26] [Netty Epoll Server IO #3/WARN]: at com.viaversion.viaversion.bukkit.handlers.BukkitDecodeHandler.decode(BukkitDecodeHandler.java:59) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(:508) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.callDecode(:447) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(:276) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(:357) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(:324) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(:296) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(:357) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(:324) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(:311) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.callDecode(:432) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(:276) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(:357) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.timeout.IdleStateHandler.channelRead(:286) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(:357) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.handler.flush.FlushConsolidationHandler.channelRead(:152) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(:357) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(:1410) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:379) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(:365) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.DefaultChannelPipeline.fireChannelRead(:919) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(:795) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.epoll.EpollEventLoop.processReady(:480) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.channel.epoll.EpollEventLoop.run(:378) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(:989) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.util.internal.ThreadExecutorMap$2.run(:74) [13:41:26] [Netty Epoll Server IO #3/WARN]: at java.lang.Thread.run(Thread.java:748) [13:41:26] [Netty Epoll Server IO #3/WARN]: Caused by: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(1) exceeds writerIndex(0): UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeHeapByteBuf(ridx: 0, widx: 0, cap: 256) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(:1478) [13:41:26] [Netty Epoll Server IO #3/WARN]: at io.netty.buffer.AbstractByteBuf.readByte(:732) [13:41:26] [Netty Epoll Server IO #3/WARN]: at net.minecraft.server.v1_12_R1.PacketDataSerializer.readByte(:711) [13:41:26] [Netty Epoll Server IO #3/WARN]: at net.minecraft.server.v1_12_R1.PacketDataSerializer.j(:225) [13:41:26] [Netty Epoll Server IO #3/WARN]: at net.minecraft.server.v1_12_R1.PacketDataSerializer.setItemTag(:313) [13:41:26] [Netty Epoll Server IO #3/WARN]: ... 62 more