20:36:46 [SEVERE] Spigot has detected an unexpected exception while handling
20:36:46 [SEVERE] player 'Username'. They will be kicked instead of crashing your server.
20:36:46 [SEVERE] Spigot recommends you report this to md_5
20:36:46 [SEVERE]
20:36:46 [SEVERE] Spigot version: 1.4.5-R0.3-SNAPSHOT
20:36:46 [SEVERE] Exception Trace Begins:
20:36:46 [SEVERE]     java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)
20:36:46 [SEVERE]     java.util.ArrayList$Itr.next(ArrayList.java:791)
20:36:46 [SEVERE]     net.minecraft.server.WorldServer.getTileEntities(WorldServer.java:605)
20:36:46 [SEVERE]     net.minecraft.server.EntityPlayer.j_(EntityPlayer.java:165)
20:36:46 [SEVERE]     net.minecraft.server.World.tickEntity(World.java:1458)
20:36:46 [SEVERE]     net.minecraft.server.World.entityJoinedWorld(World.java:1420)
20:36:46 [SEVERE]     net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:569)
20:36:46 [SEVERE]     net.minecraft.server.World.playerJoinedWorld(World.java:1410)
20:36:46 [SEVERE]     net.minecraft.server.World.tickEntities(World.java:1288)
20:36:46 [SEVERE]     net.minecraft.server.WorldServer.tickEntities(WorldServer.java:463)
20:36:46 [SEVERE]     net.minecraft.server.MinecraftServer.r(MinecraftServer.java:578)
20:36:46 [SEVERE]     net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
20:36:46 [SEVERE]     net.minecraft.server.MinecraftServer.q(MinecraftServer.java:494)
20:36:46 [SEVERE]     net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
20:36:46 [SEVERE]     net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
20:36:46 [SEVERE] Exception Trace Ends.
20:36:46 [SEVERE]