Description: Exception in server tick loop

java.lang.ClassCastException: net.minecraft.server.v1_8_R3.TileEntityChest cannot be cast to net.minecraft.server.v1_8_R3.TileEntitySkull
	at org.bukkit.craftbukkit.v1_8_R3.block.CraftSkull.<init>(CraftSkull.java:25)
	at org.bukkit.craftbukkit.v1_8_R3.block.CraftBlock.getState(CraftBlock.java:278)
	at org.bukkit.craftbukkit.v1_8_R3.CraftChunk.getTileEntities(CraftChunk.java:114)
	at co.aikar.timings.TimingHistory$2$1.apply(TimingHistory.java:120)
	at co.aikar.timings.TimingHistory$2$1.apply(TimingHistory.java:1)
	at co.aikar.util.JSONUtil.toArrayMapper(JSONUtil.java:80)
	at co.aikar.util.JSONUtil.toArrayMapper(JSONUtil.java:74)
	at co.aikar.timings.TimingHistory$2.apply(TimingHistory.java:110)
	at co.aikar.timings.TimingHistory$2.apply(TimingHistory.java:1)
	at co.aikar.util.JSONUtil.toObjectMapper(JSONUtil.java:102)
	at co.aikar.timings.TimingHistory.<init>(TimingHistory.java:105)
	at co.aikar.timings.FullServerTickHandler.stopTiming(FullServerTickHandler.java:71)
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:762)
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616)
	at java.lang.Thread.run(Thread.java:745)