[19:28:19 INFO]: Negative index in crash report handler (0/21)
[19:28:19 WARN]: Failed to handle packet for /76.220.61.104:50380
net.minecraft.util.ReportedException: Exception while updating neighbours
        at net.minecraft.world.World.func_147460_e(World.java:1132) ~[ahb.class:?]
        at net.minecraft.world.World.func_147459_d(World.java:1036) ~[ahb.class:?]
        at net.minecraft.world.World.func_147444_c(World.java:1000) ~[ahb.class:?]
        at net.minecraft.world.World.markAndNotifyBlock(World.java:856) ~[ahb.class:?]
        at net.minecraft.world.World.func_147465_d(World.java:834) ~[ahb.class:?]
        at net.minecraft.world.World.func_147468_f(World.java:954) ~[ahb.class:?]
        at net.minecraft.block.Block.removedByPlayer(Block.java:1359) ~[aji.class:?]
        at net.minecraft.block.Block.removedByPlayer(Block.java:1353) ~[aji.class:?]
        at net.minecraft.server.management.ItemInWorldManager.removeBlock(ItemInWorldManager.java:307) ~[mx.class:?]
        at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:362) ~[mx.class:?]
        at net.minecraft.server.management.ItemInWorldManager.func_73082_a(ItemInWorldManager.java:277) ~[mx.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:751) ~[nh.class:?]
        at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53) ~[ji.class:?]
        at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:8) ~[ji.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) ~[ej.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
Caused by: java.lang.NullPointerException