Index out of bounds

[DarkholmeTenk]

java.lang.IndexOutOfBoundsException: Index: 11, Size: 26
at java.util.ArrayList.rangeCheck(ArrayList.java:638)
at java.util.ArrayList.get(ArrayList.java:414)
at net.minecraft.world.World.func_72796_p(World.java:2849)
at cr0s.WarpDrive.machines.WarpEnergyStoreTE.releaseEnergy(WarpEnergyStoreTE.java:49)
at cr0s.WarpDrive.machines.WarpEnergyStoreTE.releaseEnergy(WarpEnergyStoreTE.java:61)
at cr0s.WarpDrive.machines.WarpEnergyStoreTE.func_70316_g(WarpEnergyStoreTE.java:80)
at net.minecraft.world.World.func_72939_s(World.java:2209)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:550)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

lolwut?