Program: 33749
Project: 33749
Buggy source:
public static HashMap<String,ArrayList<Event>> groupByWeek(ArrayList<Event> events){
  Log.d(Constants.LOG_TAG,"String_Node_Str" + events.size() + "String_Node_Str");
  HashMap<String,ArrayList<Event>> groups=new HashMap<>();
  ArrayList<Event> offseason=new ArrayList<>(), preseason=new ArrayList<>(), weekless=new ArrayList<>();
  for (  Event e : events) {
    ArrayList<Event> list;
    try {
      boolean official=e.isOfficial();
      TYPE type=e.getEventType();
      Date start=e.getStartDate();
      if (official && (type == TYPE.CMP_DIVISION || type == TYPE.CMP_FINALS)) {
        if (!groups.containsKey(CHAMPIONSHIP_LABEL) || groups.get(CHAMPIONSHIP_LABEL) == null) {
          list=new ArrayList<>();
          groups.put(CHAMPIONSHIP_LABEL,list);
        }
 else {
          list=groups.get(CHAMPIONSHIP_LABEL);
        }
        list.add(e);
      }
 else       if (official && (type == TYPE.REGIONAL || type == TYPE.DISTRICT || type == TYPE.DISTRICT_CMP)) {
        if (start == null) {
          weekless.add(e);
        }
 else {
          Log.d(Constants.LOG_TAG,"String_Node_Str" + e.getEventKey() + "String_Node_Str"+ e.getStartDate()+ "String_Node_Str"+ e.getCompetitionWeek());
          String label=String.format(REGIONAL_LABEL,e.getCompetitionWeek());
          if (groups.containsKey(label) && groups.get(label) != null) {
            groups.get(label).add(e);
          }
 else {
            list=new ArrayList<>();
            list.add(e);
            groups.put(label,list);
          }
        }
      }
 else       if (type == TYPE.PRESEASON) {
        preseason.add(e);
      }
 else {
        offseason.add(e);
      }
    }
 catch (    BasicModel.FieldNotDefinedException ex) {
      Log.w(Constants.LOG_TAG,"String_Node_Str" + "String_Node_Str");
    }
  }
  if (!weekless.isEmpty()) {
    groups.put(WEEKLESS_LABEL,weekless);
  }
  if (!offseason.isEmpty()) {
    groups.put(OFFSEASON_LABEL,offseason);
  }
  if (!preseason.isEmpty()) {
    groups.put(PRESEASON_LABEL,preseason);
  }
  Log.d(Constants.LOG_TAG,"String_Node_Str" + groups.keySet().toString());
  return groups;
}

Fixed version (ground truth):
public static HashMap<String,ArrayList<Event>> groupByWeek(ArrayList<Event> events){
  HashMap<String,ArrayList<Event>> groups=new HashMap<>();
  ArrayList<Event> offseason=new ArrayList<>(), preseason=new ArrayList<>(), weekless=new ArrayList<>();
  for (  Event e : events) {
    ArrayList<Event> list;
    try {
      boolean official=e.isOfficial();
      TYPE type=e.getEventType();
      Date start=e.getStartDate();
      if (official && (type == TYPE.CMP_DIVISION || type == TYPE.CMP_FINALS)) {
        if (!groups.containsKey(CHAMPIONSHIP_LABEL) || groups.get(CHAMPIONSHIP_LABEL) == null) {
          list=new ArrayList<>();
          groups.put(CHAMPIONSHIP_LABEL,list);
        }
 else {
          list=groups.get(CHAMPIONSHIP_LABEL);
        }
        list.add(e);
      }
 else       if (official && (type == TYPE.REGIONAL || type == TYPE.DISTRICT || type == TYPE.DISTRICT_CMP)) {
        if (start == null) {
          weekless.add(e);
        }
 else {
          Log.d(Constants.LOG_TAG,"String_Node_Str" + e.getEventKey() + "String_Node_Str"+ e.getStartDate()+ "String_Node_Str"+ e.getCompetitionWeek());
          String label=String.format(REGIONAL_LABEL,e.getCompetitionWeek());
          if (groups.containsKey(label) && groups.get(label) != null) {
            groups.get(label).add(e);
          }
 else {
            list=new ArrayList<>();
            list.add(e);
            groups.put(label,list);
          }
        }
      }
 else       if (type == TYPE.PRESEASON) {
        preseason.add(e);
      }
 else {
        offseason.add(e);
      }
    }
 catch (    BasicModel.FieldNotDefinedException ex) {
      Log.w(Constants.LOG_TAG,"String_Node_Str" + "String_Node_Str");
    }
  }
  if (!weekless.isEmpty()) {
    groups.put(WEEKLESS_LABEL,weekless);
  }
  if (!offseason.isEmpty()) {
    groups.put(OFFSEASON_LABEL,offseason);
  }
  if (!preseason.isEmpty()) {
    groups.put(PRESEASON_LABEL,preseason);
  }
  Log.d(Constants.LOG_TAG,"String_Node_Str" + groups.keySet().toString());
  return groups;
}