Program: 17614
Project: 17614
Buggy source:
public EPLPopulationTab(ProjectEGFile obj){
  super(obj);
  setDirty(true);
  this.population=(PrgPopulation)obj.getObject();
  setLayout(new BorderLayout());
  JPanel buttonPanel=new JPanel();
  add(buttonPanel,BorderLayout.NORTH);
  buttonPanel.add(btnTrain=new JButton("String_Node_Str"));
  buttonPanel.add(btnRescore=new JButton("String_Node_Str"));
  buttonPanel.add(btnSort=new JButton("String_Node_Str"));
  buttonPanel.add(btnReset=new JButton("String_Node_Str"));
  this.btnTrain.addActionListener(this);
  this.btnSort.addActionListener(this);
  this.btnRescore.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 EPLPopulationInfo(population),BorderLayout.CENTER);
  mainPanel.add(about,BorderLayout.NORTH);
  mainPanel.add(tabViews=new JTabbedPane(),BorderLayout.CENTER);
  this.populationModel=new EPLPopulationModel(population);
  this.populationTable=new JTable(this.populationModel);
  this.populationTable.addMouseListener(this);
  this.populationScroll=new JScrollPane(this.populationTable);
  this.tabViews.addTab("String_Node_Str",this.populationScroll);
  this.populationTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
  this.populationTable.getColumnModel().getColumn(0).setPreferredWidth(30);
  this.populationTable.getColumnModel().getColumn(1).setPreferredWidth(60);
  this.populationTable.getColumnModel().getColumn(2).setPreferredWidth(90);
  this.populationTable.getColumnModel().getColumn(3).setPreferredWidth(90);
  this.populationTable.getColumnModel().getColumn(4).setPreferredWidth(5000);
}

Fixed version (ground truth):
public EPLPopulationTab(ProjectEGFile obj){
  super(obj);
  setDirty(true);
  this.population=(PrgPopulation)obj.getObject();
  setLayout(new BorderLayout());
  JPanel buttonPanel=new JPanel();
  add(buttonPanel,BorderLayout.NORTH);
  buttonPanel.add(btnTrain=new JButton("String_Node_Str"));
  buttonPanel.add(btnRescore=new JButton("String_Node_Str"));
  buttonPanel.add(btnSort=new JButton("String_Node_Str"));
  buttonPanel.add(btnReset=new JButton("String_Node_Str"));
  this.btnTrain.addActionListener(this);
  this.btnSort.addActionListener(this);
  this.btnRescore.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 EPLPopulationInfo(population),BorderLayout.CENTER);
  mainPanel.add(about,BorderLayout.NORTH);
  mainPanel.add(tabViews=new JTabbedPane(),BorderLayout.CENTER);
  this.populationModel=new EPLPopulationModel(population);
  this.populationTable=new JTable(this.populationModel);
  this.populationTable.addMouseListener(this);
  this.populationScroll=new JScrollPane(this.populationTable);
  this.tabViews.addTab("String_Node_Str",this.populationScroll);
  this.populationTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
  this.populationTable.getColumnModel().getColumn(0).setPreferredWidth(30);
  this.populationTable.getColumnModel().getColumn(1).setPreferredWidth(60);
  this.populationTable.getColumnModel().getColumn(2).setPreferredWidth(90);
  this.populationTable.getColumnModel().getColumn(3).setPreferredWidth(90);
  this.populationTable.getColumnModel().getColumn(4).setPreferredWidth(5000);
  this.list=this.population.flatten();
}