Program: 17618
Project: 17618
Buggy source:
public NEATPopulationTab(ProjectEGFile obj){
  super(obj);
  setDirty(true);
  this.population=(NEATPopulation)obj.getObject();
  setLayout(new BorderLayout());
  JPanel buttonPanel=new JPanel();
  add(buttonPanel,BorderLayout.NORTH);
  buttonPanel.add(btnTrain=new JButton("String_Node_Str"));
  buttonPanel.add(btnEdit=new JButton("String_Node_Str"));
  buttonPanel.add(btnReset=new JButton("String_Node_Str"));
  this.btnTrain.addActionListener(this);
  this.btnEdit.addActionListener(this);
  this.btnReset.addActionListener(this);
  JPanel mainPanel=new JPanel();
  add(mainPanel,BorderLayout.CENTER);
  mainPanel.setLayout(new BorderLayout());
  JPanel about=new JPanel();
  about.setLayout(new BorderLayout());
  about.add(this.pi=new NEATPopulationInfo(population),BorderLayout.CENTER);
  mainPanel.add(about,BorderLayout.NORTH);
  mainPanel.add(tabViews=new JTabbedPane(),BorderLayout.CENTER);
  this.populationModel=new GeneralPopulationModel(population);
  this.populationTable=new JTable(this.populationModel);
  this.populationTable.addMouseListener(this);
  this.populationScroll=new JScrollPane(this.populationTable);
  this.speciesModel=new SpeciesModel(population);
  this.speciesTable=new JTable(this.speciesModel);
  this.speciesScroll=new JScrollPane(this.speciesTable);
  this.speciesTable.addMouseListener(this);
  this.innovationModel=new InnovationModel(population);
  this.innovationTable=new JTable(this.innovationModel);
  this.innovationScroll=new JScrollPane(this.innovationTable);
  this.tabViews.addTab("String_Node_Str",this.populationScroll);
  this.tabViews.addTab("String_Node_Str",this.speciesScroll);
  this.tabViews.addTab("String_Node_Str",this.innovationScroll);
}

Fixed version (ground truth):
public NEATPopulationTab(ProjectEGFile obj){
  super(obj);
  setDirty(true);
  this.population=(NEATPopulation)obj.getObject();
  setLayout(new BorderLayout());
  JPanel buttonPanel=new JPanel();
  add(buttonPanel,BorderLayout.NORTH);
  buttonPanel.add(btnTrain=new JButton("String_Node_Str"));
  buttonPanel.add(btnEdit=new JButton("String_Node_Str"));
  buttonPanel.add(btnReset=new JButton("String_Node_Str"));
  this.btnTrain.addActionListener(this);
  this.btnEdit.addActionListener(this);
  this.btnReset.addActionListener(this);
  JPanel mainPanel=new JPanel();
  add(mainPanel,BorderLayout.CENTER);
  mainPanel.setLayout(new BorderLayout());
  JPanel about=new JPanel();
  about.setLayout(new BorderLayout());
  about.add(this.pi=new NEATPopulationInfo(population),BorderLayout.CENTER);
  mainPanel.add(about,BorderLayout.NORTH);
  mainPanel.add(tabViews=new JTabbedPane(),BorderLayout.CENTER);
  this.populationModel=new GeneralPopulationModel(population);
  this.populationTable=new JTable(this.populationModel);
  this.populationTable.addMouseListener(this);
  this.populationScroll=new JScrollPane(this.populationTable);
  this.speciesModel=new SpeciesModel(population);
  this.speciesTable=new JTable(this.speciesModel);
  this.speciesScroll=new JScrollPane(this.speciesTable);
  this.speciesTable.addMouseListener(this);
  this.innovationModel=new InnovationModel(population);
  this.innovationTable=new JTable(this.innovationModel);
  this.innovationScroll=new JScrollPane(this.innovationTable);
  this.tabViews.addTab("String_Node_Str",this.populationScroll);
  this.tabViews.addTab("String_Node_Str",this.speciesScroll);
  this.tabViews.addTab("String_Node_Str",this.innovationScroll);
  this.list=this.population.flatten();
}