2015-03-20 16:58:51 [ERROR] Encountered an unexpected exception
net.minecraft.server.v1_8_R2.ReportedException: Ticking block entity
at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:728) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:336) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:626) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:534) [craftbukkit-1.8.jar:git-Bukkit-350cb99]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_75]
Caused by: java.lang.NullPointerException
at net.minecraft.server.v1_8_R2.TileEntity.getOwner(TileEntity.java:225) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.TileEntityHopper.r(TileEntityHopper.java:263) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.TileEntityHopper.m(TileEntityHopper.java:189) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.TileEntityHopper.c(TileEntityHopper.java:177) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.World.tickEntities(World.java:1313) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.WorldServer.tickEntities(WorldServer.java:559) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:724) ~[craftbukkit-1.8.jar:git-Bukkit-350cb99]
... 4 more

Crash report - http://frymaster.127001.org/files/crash-2015-03-20_16.58.51-server.txt
Region file - http://frymaster.127001.org/files/r.-3.-2.mca

A tp to coords -1509 200 -940 will trigger the crash