2014-11-21 07:28:53 [WARNING] [IslandWorld] Task #34 for IslandWorld v1.6.4 generated an exception
java.lang.NullPointerException
	at exnihilo.blocks.tileentities.TileEntityBarrel.func_70299_a(TileEntityBarrel.java:1020)
	at org.bukkit.craftbukkit.v1_6_R3.inventory.CraftInventory.setItem(CraftInventory.java:79)
	at org.bukkit.craftbukkit.v1_6_R3.inventory.CraftInventory.clear(CraftInventory.java:396)
	at org.bukkit.craftbukkit.v1_6_R3.inventory.CraftInventory.clear(CraftInventory.java:401)
	at pl.islandworld.IslandWorld.deleteIsle(IslandWorld.java:1123)
	at pl.islandworld.IslandWorld.access$0(IslandWorld.java:1099)
	at pl.islandworld.IslandWorld$Rebuild.run(IslandWorld.java:934)
	at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftTask.run(CraftTask.java:58)
	at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:829)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:331)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:784)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:666)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)