java.lang.ClassCastException: iv cannot be cast to rp
        at ahi.a(SourceFile:32)
        at ahi.a(SourceFile:17)
        at aai.a(SourceFile:130)
        at aai.a(SourceFile:123)
        at l.a(SourceFile:322)
        at kz.a(SourceFile:892)
        at kz.b(SourceFile:747)
        at net.minecraft.client.Minecraft.x(SourceFile:742)
        at net.minecraft.client.Minecraft.run(SourceFile:662)
        at java.lang.Thread.run(Unknown Source)