Program: 19243
Project: 19243
Buggy source:
@Override public void setData(Object featureCollection) throws IOException {
  try {
    this.tsData=(StationTimeSeriesFeatureCollection)featureCollection;
    tsStationList=tsData.getStations(reqStationNames);
    for (    Station st : tsStationList) {
      if (st == null)       System.out.println("String_Node_Str");
 else       System.out.println(st.getName());
    }
    setNumberOfStations(tsStationList.size());
    if (tsStationList.size() > 0) {
      DateTime dtStart=null;
      DateTime dtEnd=null;
      DateTime dtStartt=null;
      DateTime dtEndt=null;
      DateRange dateRange=null;
      for (int i=0; i < tsStationList.size(); i++) {
        tsData.getStationFeature(tsStationList.get(i)).calcBounds();
        if (i == 0) {
          setInitialLatLonBoundaries(tsStationList);
          dateRange=tsData.getStationFeature(tsStationList.get(0)).getDateRange();
          dtStart=new DateTime(dateRange.getStart().getDate(),chrono);
          dtEnd=new DateTime(dateRange.getEnd().getDate(),chrono);
        }
 else {
          dateRange=tsData.getStationFeature(tsStationList.get(i)).getDateRange();
          dtStartt=new DateTime(dateRange.getStart().getDate(),chrono);
          dtEndt=new DateTime(dateRange.getEnd().getDate(),chrono);
          if (dtStartt.isBefore(dtStart)) {
            dtStart=dtStartt;
          }
          if (dtEndt.isAfter(dtEnd)) {
            dtEnd=dtEndt;
          }
          checkLatLonAltBoundaries(tsStationList,i);
        }
      }
      setStartDate(df.toDateTimeStringISO(dtStart.toDate()));
      setEndDate(df.toDateTimeStringISO(dtEnd.toDate()));
    }
  }
 catch (  Exception ex) {
    System.out.println("String_Node_Str" + ex.toString());
    for (    StackTraceElement e : ex.getStackTrace()) {
      System.out.println(e.toString());
    }
    throw new IOException(ex.toString());
  }
}

Fixed version (ground truth):
@Override public void setData(Object featureCollection) throws IOException {
  try {
    this.tsData=(StationTimeSeriesFeatureCollection)featureCollection;
    tsStationList=tsData.getStations(reqStationNames);
    setNumberOfStations(tsStationList.size());
    if (tsStationList.size() > 0) {
      DateTime dtStart=null;
      DateTime dtEnd=null;
      DateTime dtStartt=null;
      DateTime dtEndt=null;
      DateRange dateRange=null;
      for (int i=0; i < tsStationList.size(); i++) {
        tsData.getStationFeature(tsStationList.get(i)).calcBounds();
        if (i == 0) {
          setInitialLatLonBoundaries(tsStationList);
          dateRange=tsData.getStationFeature(tsStationList.get(0)).getDateRange();
          dtStart=new DateTime(dateRange.getStart().getDate(),chrono);
          dtEnd=new DateTime(dateRange.getEnd().getDate(),chrono);
        }
 else {
          dateRange=tsData.getStationFeature(tsStationList.get(i)).getDateRange();
          dtStartt=new DateTime(dateRange.getStart().getDate(),chrono);
          dtEndt=new DateTime(dateRange.getEnd().getDate(),chrono);
          if (dtStartt.isBefore(dtStart)) {
            dtStart=dtStartt;
          }
          if (dtEndt.isAfter(dtEnd)) {
            dtEnd=dtEndt;
          }
          checkLatLonAltBoundaries(tsStationList,i);
        }
      }
      setStartDate(df.toDateTimeStringISO(dtStart.toDate()));
      setEndDate(df.toDateTimeStringISO(dtEnd.toDate()));
    }
  }
 catch (  Exception ex) {
    System.out.println("String_Node_Str" + ex.toString());
    for (    StackTraceElement e : ex.getStackTrace()) {
      System.out.println(e.toString());
    }
    throw new IOException(ex.toString());
  }
}