#fixed code
                              public void aggregate(DoublePopulationStatisticsAggregator other) {
    if (other.maximum > this.maximum) {
      this.maximum = other.maximum;
    }
    if (other.minimum < this.minimum) {
      this.minimum = other.minimum;
    }
    this.numValues += other.numValues;
    this.total += other.total;
    this.reservoirSample.sample(other.reservoirSample, random);
  }
#vulnerable code 
                              public void aggregate(DoublePopulationStatisticsAggregator other) {
    if (numValues == 0) {
      // Copy deciles directly
      System.arraycopy(other.deciles, 0, deciles, 0, 9);
    } else if (other.numValues == 0) {
      // Keep this deciles unchanged
    } else {
      // Aggregate both deciles
      aggregateDeciles(this.deciles, this.numValues, this.getMaximum(),
          other.deciles, other.numValues, other.getMaximum(),
          this.deciles);
    }
    if (other.maximum > this.maximum) {
      this.maximum = other.maximum;
    }
    if (other.minimum < this.minimum) {
      this.minimum = other.minimum;
    }
    this.numValues += other.numValues;
    this.total += other.total;
  } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE