[1.81] chainsaw SMP crash, and I cannot relogin

    hi, today I was sharing a tree with chainsaw in SMP, and then my client crash because of the server. In the server side, the error was:



    [WARNING] Failed to handle packet: java.lang.NullPointerException
    java.lang.NullPointerException
    at kn.d(SourceFile:129)
    at kn.f(SourceFile:143)
    at km.a(SourceFile:200)
    at iy.a_(EntityItem.java:195)
    at if.l(EntityPlayer.java:484)
    at if.e(EntityPlayer.java:475)
    at nc.G_(EntityLiving.java:617)
    at if.G_(EntityPlayer.java:228 )
    at gh.a(EntityPlayerMP.java:251)
    at mk.a(NetServerHandler.java:237)
    at ju.a(SourceFile:126)
    at qo.b(NetworkManager.java:353)
    at mk.a(NetServerHandler.java:69)
    at fj.a(SourceFile:108 )
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:558 )
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:439)
    at dm.run(SourceFile:490)


    After that, I cannot relogin, because the server allways said that.
    I can relogin only if all the players sleep at the same time.