Program: 174557
Project: 174557
Buggy source:
public boolean attackEntityAsMob(Entity entityIn){
  if (!this.world.isRemote) {
    boolean smite=this.rand.nextInt(3) == 1;
    if (smite) {
      this.isImmuneToFire=true;
    }
 else {
      this.isImmuneToFire=false;
    }
    if (this.isCharged()) {
      AxisAlignedBB axisalignedbb=(new AxisAlignedBB(this.posX,this.posY,this.posZ,(this.posX + 1),(this.posY + 1),(this.posZ + 1))).grow(12.0,(double)this.world.getHeight(),12.0);
      List<EntityLivingBase> list=this.world.<EntityLivingBase>getEntitiesWithinAABB(EntityLivingBase.class,axisalignedbb);
      for (      EntityLivingBase entity : list) {
        if (!this.isOwner(entity)) {
          boolean shouldAttack=true;
          if (entity instanceof EntityGem) {
            EntityGem gem=(EntityGem)entity;
            if (this.getServitude() == gem.getServitude()) {
              if (this.getServitude() == EntityGem.SERVE_HUMAN) {
                shouldAttack=this.isOwnerId(gem.getOwnerId());
              }
 else {
                shouldAttack=false;
              }
            }
          }
          if (shouldAttack) {
            if (smite) {
              EntityLightningBolt lightningBolt=new EntityLightningBolt(this.world,entity.posX,entity.posY,entity.posZ,true);
              this.world.addWeatherEffect(lightningBolt);
              entity.setFire(12);
            }
            entity.addPotionEffect(new PotionEffect(MobEffects.MINING_FATIGUE,80));
            entity.addPotionEffect(new PotionEffect(MobEffects.SLOWNESS,80));
            entity.addPotionEffect(new PotionEffect(MobEffects.WEAKNESS,80));
          }
        }
      }
    }
 else {
      if (smite) {
        EntityLightningBolt lightningBolt=new EntityLightningBolt(this.world,entityIn.posX,entityIn.posY,entityIn.posZ,true);
        this.world.addWeatherEffect(lightningBolt);
        entityIn.setFire(12);
      }
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.MINING_FATIGUE,80));
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.SLOWNESS,80));
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.WEAKNESS,80));
    }
  }
  return super.attackEntityAsMob(entityIn);
}

Fixed version (ground truth):
public boolean attackEntityAsMob(Entity entityIn){
  if (!this.world.isRemote) {
    boolean smite=this.rand.nextInt(3) == 1;
    if (smite) {
      this.isImmuneToFire=true;
    }
 else {
      this.isImmuneToFire=false;
    }
    if (this.isCharged()) {
      AxisAlignedBB axisalignedbb=(new AxisAlignedBB(this.posX,this.posY,this.posZ,(this.posX + 1),(this.posY + 1),(this.posZ + 1))).grow(12.0,(double)this.world.getHeight(),12.0);
      List<EntityLivingBase> list=this.world.<EntityLivingBase>getEntitiesWithinAABB(EntityLivingBase.class,axisalignedbb);
      for (      EntityLivingBase entity : list) {
        if (!this.isOwner(entity)) {
          boolean shouldAttack=true;
          if (entity instanceof EntityGem) {
            EntityGem gem=(EntityGem)entity;
            if (this.getServitude() == gem.getServitude()) {
              if (this.getServitude() == EntityGem.SERVE_HUMAN) {
                shouldAttack=!this.isOwnerId(gem.getOwnerId());
              }
 else {
                shouldAttack=false;
              }
            }
          }
          if (shouldAttack) {
            if (smite) {
              EntityLightningBolt lightningBolt=new EntityLightningBolt(this.world,entity.posX,entity.posY,entity.posZ,true);
              this.world.addWeatherEffect(lightningBolt);
              entity.setFire(12);
            }
            entity.addPotionEffect(new PotionEffect(MobEffects.MINING_FATIGUE,80));
            entity.addPotionEffect(new PotionEffect(MobEffects.SLOWNESS,80));
            entity.addPotionEffect(new PotionEffect(MobEffects.WEAKNESS,80));
          }
        }
      }
    }
 else {
      if (smite) {
        EntityLightningBolt lightningBolt=new EntityLightningBolt(this.world,entityIn.posX,entityIn.posY,entityIn.posZ,true);
        this.world.addWeatherEffect(lightningBolt);
        entityIn.setFire(12);
      }
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.MINING_FATIGUE,80));
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.SLOWNESS,80));
      ((EntityLivingBase)entityIn).addPotionEffect(new PotionEffect(MobEffects.WEAKNESS,80));
    }
  }
  return super.attackEntityAsMob(entityIn);
}