Program: 81800
Project: 81800
Buggy source:
/** 
 * Called to update the entity's position/logic.
 */
public void onUpdate(){
  super.onUpdate();
  if (world.isRemote) {
    if (this.lightningState == 2) {
      updateSoundEffect();
    }
  }
  --this.lightningState;
  if (this.lightningState < 0) {
    if (this.boltLivingTime == 0) {
      this.setDead();
    }
 else     if (this.lightningState < -this.rand.nextInt(10)) {
      --this.boltLivingTime;
      this.lightningState=1;
      this.boltVertex=this.rand.nextLong();
      if (!this.world.isRemote && rand.nextInt(fireChance) == 0 && this.world.getGameRules().getBoolean("String_Node_Str") && this.world.isAreaLoaded(new BlockPos(MathHelper.floor(this.posX),MathHelper.floor(this.posY),MathHelper.floor(this.posZ)),10)) {
        int i=MathHelper.floor(this.posX);
        int j=MathHelper.floor(this.posY);
        int k=MathHelper.floor(this.posZ);
        if (ConfigStorm.Lightning_StartsFires) {
          if (CoroUtilBlock.isAir(world.getBlockState(new BlockPos(i,j,k)).getBlock()) && Blocks.FIRE.canPlaceBlockAt(world,new BlockPos(i,j,k))) {
            world.setBlockState(new BlockPos(i,j,k),Blocks.FIRE.getDefaultState().withProperty(BlockFire.AGE,fireLifeTime),3);
          }
        }
      }
    }
  }
  if (this.lightningState >= 0) {
    if (this.world.isRemote) {
      updateFlashEffect();
    }
 else {
      double d0=3.0D;
      List list=this.world.getEntitiesWithinAABBExcludingEntity(this,new AxisAlignedBB(this.posX - d0,this.posY - d0,this.posZ - d0,this.posX + d0,this.posY + 6.0D + d0,this.posZ + d0));
      for (int l=0; l < list.size(); ++l) {
        Entity entity=(Entity)list.get(l);
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * Called to update the entity's position/logic.
 */
public void onUpdate(){
  super.onUpdate();
  if (world.isRemote) {
    if (this.lightningState == 2) {
      updateSoundEffect();
    }
  }
  --this.lightningState;
  if (this.lightningState < 0) {
    if (this.boltLivingTime == 0) {
      this.setDead();
    }
 else     if (this.lightningState < -this.rand.nextInt(10)) {
      --this.boltLivingTime;
      this.lightningState=1;
      this.boltVertex=this.rand.nextLong();
      if (!this.world.isRemote && rand.nextInt(fireChance) == 0 && this.world.getGameRules().getBoolean("String_Node_Str") && this.world.isAreaLoaded(new BlockPos(MathHelper.floor(this.posX),MathHelper.floor(this.posY),MathHelper.floor(this.posZ)),10)) {
        int i=MathHelper.floor(this.posX);
        int j=MathHelper.floor(this.posY);
        int k=MathHelper.floor(this.posZ);
        if (ConfigStorm.Lightning_StartsFires) {
          if (CoroUtilBlock.isAir(world.getBlockState(new BlockPos(i,j,k)).getBlock()) && Blocks.FIRE.canPlaceBlockAt(world,new BlockPos(i,j,k))) {
            world.setBlockState(new BlockPos(i,j,k),Blocks.FIRE.getDefaultState().withProperty(BlockFire.AGE,fireLifeTime),3);
          }
        }
      }
    }
  }
  if (this.lightningState >= 0) {
    if (this.world.isRemote) {
      updateFlashEffect();
    }
 else {
      net.minecraft.entity.effect.EntityLightningBolt vanillaBolt=new net.minecraft.entity.effect.EntityLightningBolt(world,this.posX,this.posY,this.posZ,true);
      double d0=3.0D;
      List list=this.world.getEntitiesWithinAABBExcludingEntity(this,new AxisAlignedBB(this.posX - d0,this.posY - d0,this.posZ - d0,this.posX + d0,this.posY + 6.0D + d0,this.posZ + d0));
      for (int l=0; l < list.size(); ++l) {
        Entity entity=(Entity)list.get(l);
        entity.onStruckByLightning(vanillaBolt);
      }
    }
  }
}