2014-02-20   19:16:37   [SEVERE]   Encountered an unexpected exception NullPointerException
java.lang.NullPointerException
at   net.minecraft.server.EntityPlayer.getDisplayName(EntityPlayer.java:1556)
at   net.minecraft.server.Packet20NamedEntitySpawn.(Packet20NamedEntitySpawn.java:26)
at   net.minecraft.server.EntityTrackerEntry.c(EntityTrackerEntry.java:358)
at   net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:268)
at   net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:342)
at   net.minecraft.server.EntityTrackerEntry.a(EntityTrackerEntry.java:71)
at   net.minecraft.server.EntityTracker.a(EntityTracker.java:197)
at   net.minecraft.server.MinecraftServer.t(MinecraftServer.java:515)
at   net.minecraft.server.DedicatedServer.t(DedicatedServer.java:204)
at   net.minecraft.server.MinecraftServer.s(MinecraftServer.java:432)
at   net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
at   net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:13)

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Player player = Canary.getServer().getPlayer(caller.getName());
EntityFactory factory = Canary.factory().getEntityFactory();
NonPlayableCharacter npc = factory.newNPC("Gordon", player.getLocation());
npc.spawn();