Program: 13137
Project: 13137
Buggy source:
public VPNode(final List<E> points,final int capacity,final DistanceFunction<E> distanceFunction,final ThresholdSelectionStrategy<E> thresholdSelectionStrategy){
  if (capacity < 1) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  if (points.isEmpty()) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  this.capacity=capacity;
  this.distanceFunction=distanceFunction;
  this.thresholdSelectionStrategy=thresholdSelectionStrategy;
  if (points.size() > this.capacity) {
    this.vantagePoint=points.get(0);
    this.threshold=this.thresholdSelectionStrategy.selectThreshold(this.vantagePoint,points,this.distanceFunction);
    final int firstIndexPastThreshold;
{
      int i=0;
      int j=points.size() - 1;
      for (; i <= j; i++) {
        if (this.distanceFunction.getDistance(this.vantagePoint,points.get(i)) > this.threshold) {
          for (; j >= i; j--) {
            if (this.distanceFunction.getDistance(this.vantagePoint,points.get(j)) <= this.threshold) {
              Collections.swap(points,i,j--);
              break;
            }
          }
        }
      }
      firstIndexPastThreshold=this.distanceFunction.getDistance(this.vantagePoint,points.get(i - 1)) > this.threshold ? i - 1 : i;
    }
    if (this.distanceFunction.getDistance(this.vantagePoint,points.get(0)) <= this.threshold && this.distanceFunction.getDistance(this.vantagePoint,points.get(points.size() - 1)) > this.threshold) {
      this.closer=new VPNode<E>(points.subList(0,firstIndexPastThreshold),this.capacity,this.distanceFunction,this.thresholdSelectionStrategy);
      this.farther=new VPNode<E>(points.subList(firstIndexPastThreshold,points.size()),this.capacity,this.distanceFunction,this.thresholdSelectionStrategy);
    }
  }
  if (this.closer == null) {
    this.points=new ArrayList<E>(points);
  }
}

Fixed version (ground truth):
public VPNode(final List<E> points,final int capacity,final DistanceFunction<E> distanceFunction,final ThresholdSelectionStrategy<E> thresholdSelectionStrategy){
  if (capacity < 1) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  if (points.isEmpty()) {
    throw new IllegalArgumentException("String_Node_Str");
  }
  this.capacity=capacity;
  this.distanceFunction=distanceFunction;
  this.thresholdSelectionStrategy=thresholdSelectionStrategy;
  if (points.size() > this.capacity) {
    this.vantagePoint=points.get(new Random().nextInt(points.size()));
    this.threshold=this.thresholdSelectionStrategy.selectThreshold(this.vantagePoint,points,this.distanceFunction);
    final int firstIndexPastThreshold;
{
      int i=0;
      int j=points.size() - 1;
      for (; i <= j; i++) {
        if (this.distanceFunction.getDistance(this.vantagePoint,points.get(i)) > this.threshold) {
          for (; j >= i; j--) {
            if (this.distanceFunction.getDistance(this.vantagePoint,points.get(j)) <= this.threshold) {
              Collections.swap(points,i,j--);
              break;
            }
          }
        }
      }
      firstIndexPastThreshold=this.distanceFunction.getDistance(this.vantagePoint,points.get(i - 1)) > this.threshold ? i - 1 : i;
    }
    if (this.distanceFunction.getDistance(this.vantagePoint,points.get(0)) <= this.threshold && this.distanceFunction.getDistance(this.vantagePoint,points.get(points.size() - 1)) > this.threshold) {
      this.closer=new VPNode<E>(points.subList(0,firstIndexPastThreshold),this.capacity,this.distanceFunction,this.thresholdSelectionStrategy);
      this.farther=new VPNode<E>(points.subList(firstIndexPastThreshold,points.size()),this.capacity,this.distanceFunction,this.thresholdSelectionStrategy);
    }
  }
  if (this.closer == null) {
    this.points=new ArrayList<E>(points);
  }
}