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I go into my world, and try to mine Stone Brick with my Efficiency 3 Diamond Pickaxe, this error shows up:


java.lang.ArrayIndexOutOfBoundsException: 33
at java.util.ArrayList.add(Unknown Source)
at net.minecraftforge.event.ListenerList.<init>(ListenerList.java:22)
at net.minecraftforge.event.entity.player.PlayerEvent$BreakSpeed.setup(PlayerEvent.java)
at net.minecraftforge.event.Event.<init>(Event.java:34)
at net.minecraftforge.event.entity.EntityEvent.<init>(EntityEvent.java:11)
at net.minecraftforge.event.entity.living.LivingEvent.<init>(LivingEvent.java:12)
at net.minecraftforge.event.entity.player.PlayerEvent.<init>(PlayerEvent.java:14)
at net.minecraftforge.event.entity.player.PlayerEvent$BreakSpeed.<init>(PlayerEvent.java:41)
at net.minecraftforge.event.ForgeEventFactory.getBreakSpeed(ForgeEventFactory.java:18)
at qx.getCurrentPlayerStrVsBlock(EntityPlayer.java:777)
at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:121)
at amj.a(Block.java:648)
at ir.a(ItemInWorldManager.java:179)
at iv.a(NetServerHandler.java:445)
at ej.a(SourceFile:46)
at cf.b(MemoryConnection.java:79)
at iv.d(NetServerHandler.java:82)
at iw.b(NetworkListenThread.java:55)
at bdr.b(IntegratedServerListenThread.java:111)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:691)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:587)
at bdo.q(IntegratedServer.java:110)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:494)
at fy.run(SourceFile:856)

I understand some of it, but not why the error was caused.