[Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_101]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_101]
	at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.lang.NullPointerException
	at com.grim3212.mc.pack.decor.block.BlockHedge.func_180657_a(BlockHedge.java:59) ~[BlockHedge.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.func_180237_b(PlayerInteractionManager.java:336) ~[lv.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.func_180785_a(PlayerInteractionManager.java:248) ~[lv.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:642) ~[me.class:?]
	at net.minecraft.network.play.client.CPacketPlayerDigging.func_148833_a(SourceFile:40) ~[ja.class:?]
	at net.minecraft.network.play.client.CPacketPlayerDigging.func_148833_a(SourceFile:10) ~[ja.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fl$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_101]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_101]
	at net.minecraft.util.Util.func_181617_a(SourceFile:45) ~[h.class:?]
	... 5 more