Program: 19683
Project: 19683
Buggy source:
@SuppressWarnings("String_Node_Str") HunterPanel(PublicAgentDataModel dm){
  this.dm=dm;
  String current="String_Node_Str";
  if (!sim.isParticipantActive(dm.getId())) {
    current="String_Node_Str";
  }
 else   if (dm.getGroupId() != null) {
    String Leader="String_Node_Str";
    if (!PublicEnvironmentConnection.getInstance().getGroupById(this.dm.getGroupId()).getPanel().isEmpty()) {
      for (      String ldr : PublicEnvironmentConnection.getInstance().getGroupById(this.dm.getGroupId()).getPanel()) {
        if (ldr.equals(this.dm.getId())) {
          Leader="String_Node_Str";
        }
      }
    }
    current="String_Node_Str" + ec.getGroupById(dm.getGroupId()).getName() + Leader;
  }
 else {
    current="String_Node_Str";
  }
  String food=Double.toString(this.dm.getFoodAmount());
  String Loyalty="String_Node_Str";
  String Happiness="String_Node_Str";
  if (this.dm.getGroupId() != null) {
    Loyalty=Double.toString(this.dm.getCurrentLoyalty());
    Happiness=Double.toString(this.dm.getCurrentHappiness());
  }
  String Social=Double.toString(this.dm.getSocialBelief());
  String Economic=Double.toString(this.dm.getEconomicBelief());
  String LastHunted="String_Node_Str";
  if (this.dm.getTime() > 4 && this.dm.getLastHunted() != null) {
    LastHunted=this.dm.getLastHunted().getName();
  }
  JPanel dataPanel=new JPanel(new GridLayout(3,3,1,-1));
  dataPanel.add(labelise(dm.getName(),8));
  dataPanel.add(labelise(dm.getPlayerClass()));
  dataPanel.add(labelise(current));
  dataPanel.add(labelise("String_Node_Str" + food));
  dataPanel.add(labelise("String_Node_Str" + Economic));
  dataPanel.add(labelise("String_Node_Str" + Social));
  dataPanel.add(labelise("String_Node_Str" + Loyalty));
  dataPanel.add(labelise("String_Node_Str" + Happiness));
  dataPanel.add(labelise("String_Node_Str" + LastHunted));
  this.setLayout(new GridLayout(1,1));
  this.add(dataPanel);
  this.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
  window.add(this);
  this.setPreferredSize(new Dimension(getWidth() - barWidth,125));
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") HunterPanel(PublicAgentDataModel dm){
  this.dm=dm;
  PublicEnvironmentConnection Conn=PublicEnvironmentConnection.getInstance();
  String current="String_Node_Str";
  if (!sim.isParticipantActive(dm.getId())) {
    current="String_Node_Str";
  }
 else   if (Conn.availableGroups() != null && dm.getGroupId() != null && Conn.getGroupById(this.dm.getGroupId()) != null) {
    String Leader="String_Node_Str";
    if (Conn.getGroupById(this.dm.getGroupId()).getPanel() != null) {
      for (      String ldr : Conn.getGroupById(this.dm.getGroupId()).getPanel()) {
        if (ldr.equals(dm.getId())) {
          Leader="String_Node_Str";
        }
      }
    }
    if (Conn.getGroupById(dm.getGroupId()) != null)     current="String_Node_Str" + Conn.getGroupById(dm.getGroupId()).getName() + Leader;
  }
 else {
    current="String_Node_Str";
  }
  String food=Double.toString(this.dm.getFoodAmount());
  String Loyalty="String_Node_Str";
  String Happiness="String_Node_Str";
  if (this.dm.getGroupId() != null) {
    Loyalty=Double.toString(this.dm.getCurrentLoyalty());
    Happiness=Double.toString(this.dm.getCurrentHappiness());
  }
  String Social=Double.toString(this.dm.getSocialBelief());
  String Economic=Double.toString(this.dm.getEconomicBelief());
  String LastHunted="String_Node_Str";
  if (this.dm.getTime() > 4 && this.dm.getLastHunted() != null) {
    LastHunted=this.dm.getLastHunted().getName();
  }
  JPanel dataPanel=new JPanel(new GridLayout(3,3,1,-1));
  dataPanel.add(labelise(dm.getName(),8));
  dataPanel.add(labelise(dm.getPlayerClass()));
  dataPanel.add(labelise(current));
  dataPanel.add(labelise("String_Node_Str" + food));
  dataPanel.add(labelise("String_Node_Str" + Economic));
  dataPanel.add(labelise("String_Node_Str" + Social));
  dataPanel.add(labelise("String_Node_Str" + Loyalty));
  dataPanel.add(labelise("String_Node_Str" + Happiness));
  dataPanel.add(labelise("String_Node_Str" + LastHunted));
  this.setLayout(new GridLayout(1,1));
  this.add(dataPanel);
  this.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
  window.add(this);
  this.setPreferredSize(new Dimension(getWidth() - barWidth,125));
}