---- Minecraft Crash Report ----
// Oh - I know what I did wrong!

Time: 3/2/16 2:33 PM
Description: Ticking block entity

java.lang.IndexOutOfBoundsException: Index: 1, Size: 2
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at net.minecraft.server.v1_9_R1.World.getTileEntity(World.java:1926)
	at net.minecraft.server.v1_9_R1.WorldServer.getTileEntity(WorldServer.java:122)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.b(TileEntityHopper.java:536)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.b(TileEntityHopper.java:519)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.a(TileEntityHopper.java:325)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.m(TileEntityHopper.java:173)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.c(TileEntityHopper.java:157)
	at net.minecraft.server.v1_9_R1.World.tickEntities(World.java:1459)
	at net.minecraft.server.v1_9_R1.WorldServer.tickEntities(WorldServer.java:627)
	at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:792)
	at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400)
	at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660)
	at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at net.minecraft.server.v1_9_R1.World.getTileEntity(World.java:1926)
	at net.minecraft.server.v1_9_R1.WorldServer.getTileEntity(WorldServer.java:122)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.b(TileEntityHopper.java:536)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.b(TileEntityHopper.java:519)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.a(TileEntityHopper.java:325)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.m(TileEntityHopper.java:173)
	at net.minecraft.server.v1_9_R1.TileEntityHopper.c(TileEntityHopper.java:157)