2012-10-11 22:22:42 [SEVERE] [ProtocolLib] Exception occured in onPacketSending() for ProtocolLibTest
java.lang.NullPointerException
    at org.bukkit.craftbukkit.inventory.CraftItemStack.<init>(CraftItemStack.java:27)
    at com.comphenix.protocol.events.PacketContainer.toStackNMS(PacketContainer.java:212)
    at com.comphenix.protocol.events.PacketContainer.access$000(PacketContainer.java:49)
    at com.comphenix.protocol.events.PacketContainer$1.getGeneric(PacketContainer.java:148)
    at com.comphenix.protocol.events.PacketContainer$1.getGeneric(PacketContainer.java:146)
    at com.comphenix.protocol.reflect.StructureModifier.write(StructureModifier.java:170)
    at me.itreptau.protocolLibTest.ProtocolLibTest$1.onPacketSending(ProtocolLibTest.java:124)
    at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:56)
    at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:298)
    at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:279)
    at com.comphenix.protocol.injector.player.PlayerInjector.handlePacketRecieved(PlayerInjector.java:296)
    at com.comphenix.protocol.injector.player.NetworkServerInjector.handlePacketRecieved(NetworkServerInjector.java:33)
    at com.comphenix.protocol.injector.player.NetworkServerInjector$1.intercept(NetworkServerInjector.java:134)
    at net.minecraft.server.NetServerHandler$$EnhancerByCGLIB$$525cbeb4.sendPacket(<generated>)
    at net.minecraft.server.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:263)
    at net.minecraft.server.EntityTracker.updatePlayers(EntityTracker.java:147)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:565)
    at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
    at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:473)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:405)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)