---- Minecraft Crash Report ----
                    // There are four lights!

                    Time: 18-2-12 下午8:34
                    Description: Ticking entity

                    java.lang.IllegalArgumentException: bound must be positive
                        at java.util.Random.nextInt(Unknown Source)
                        at net.minecraft.enchantment.EnchantmentHelper.func_77508_a(EnchantmentHelper.java:185)
                        at net.minecraft.entity.EntityLivingBase.func_70672_c(EntityLivingBase.java:1255)
                        at net.minecraft.entity.EntityLivingBase$5.apply(EntityLivingBase.java:1364)
                        at net.minecraft.entity.EntityLivingBase$5.apply(EntityLivingBase.java:1360)
                        at net.minecraft.entity.EntityLivingBase.calculateDebuffsAndCallCB(EntityLivingBase.java:1367)
                        at net.minecraft.entity.EntityLivingBase.damageEntity_CB(EntityLivingBase.java:1424)
                        at net.minecraft.entity.player.EntityPlayer.damageEntity_CB(EntityPlayer.java:1240)
                        at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:901)
                        at net.minecraft.entity.player.EntityPlayer.func_70097_a(EntityPlayer.java:1153)
                        at net.minecraft.entity.player.EntityPlayerMP.func_70097_a(EntityPlayerMP.java:668)
                        at net.minecraft.entity.projectile.EntityArrow.func_70071_h_(EntityArrow.java:316)
                        at net.minecraft.world.World.func_72866_a(World.java:2740)
                        at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:877)
                        at net.minecraft.world.World.func_72870_g(World.java:2678)
                        at net.minecraft.world.World.func_72939_s(World.java:2480)
                        at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:673)
                        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:986)
                        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432)
                        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841)
                        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693)
                        at java.lang.Thread.run(Unknown Source)