Program: 173674
Project: 173674
Buggy source:
private void startNewGame(){
  try {
    for (int i=0; i < playerBoxes.length; i++) {
      if (playerBoxes[i] != null && playerBoxes[i].getSelectedIndex() == HUMAN_PLAYER && !playerNameFields[i].getText().equals("String_Node_Str")) {
        playerNames.add(playerNameFields[i].getText());
      }
    }
    if (playerNames.size() < Player.MIN_PLAYERS || playerNames.size() > Player.MAX_PLAYERS) {
      if (JOptionPane.showConfirmDialog(this,"String_Node_Str","String_Node_Str",JOptionPane.YES_NO_OPTION) == JOptionPane.NO_OPTION) {
        return;
      }
    }
  }
 catch (  NullPointerException e) {
    e.printStackTrace();
    JOptionPane.showMessageDialog(this,"String_Node_Str");
    System.exit(-1);
  }
  if (optionsPane.isVisible()) {
    GameOption option;
    JCheckBox checkbox;
    JComboBox dropdown;
    String value;
    for (int i=0; i < availableOptions.size(); i++) {
      option=availableOptions.get(i);
      if (option.isBoolean()) {
        checkbox=(JCheckBox)optionComponents.get(i);
        value=checkbox.isSelected() ? "String_Node_Str" : "String_Node_Str";
      }
 else {
        dropdown=(JComboBox)optionComponents.get(i);
        value=(String)dropdown.getSelectedItem();
      }
      selectedOptions.put(option.getName(),value);
      log.info("String_Node_Str" + option.getName() + "String_Node_Str"+ value);
    }
  }
 else {
    GameOption option;
    String value;
    for (int i=0; i < availableOptions.size(); i++) {
      option=availableOptions.get(i);
      value=option.getDefaultValue();
      selectedOptions.put(option.getName(),value);
      log.info("String_Node_Str" + option.getName() + "String_Node_Str"+ value);
    }
  }
  game=new Game(gameName,playerNames,selectedOptions);
  if (!game.setup()) {
    JOptionPane.showMessageDialog(this,DisplayBuffer.get(),"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    System.exit(-1);
  }
 else {
    String startError=game.start();
    if (startError != null) {
      JOptionPane.showMessageDialog(this,startError,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }
    startGameUIManager(game);
    gameUIManager.gameUIInit();
  }
  this.setVisible(false);
}

Fixed version (ground truth):
private void startNewGame(){
  try {
    for (int i=0; i < playerBoxes.length; i++) {
      if (playerBoxes[i] != null && playerBoxes[i].getSelectedIndex() == HUMAN_PLAYER && !playerNameFields[i].getText().equals("String_Node_Str")) {
        playerNames.add(playerNameFields[i].getText());
      }
    }
    if (playerNames.size() < Player.MIN_PLAYERS || playerNames.size() > Player.MAX_PLAYERS) {
      if (JOptionPane.showConfirmDialog(this,"String_Node_Str","String_Node_Str",JOptionPane.YES_NO_OPTION) == JOptionPane.NO_OPTION) {
        return;
      }
    }
  }
 catch (  NullPointerException e) {
    e.printStackTrace();
    JOptionPane.showMessageDialog(this,"String_Node_Str");
    System.exit(-1);
  }
  if (optionsPane.isVisible()) {
    GameOption option;
    JCheckBox checkbox;
    JComboBox dropdown;
    String value;
    for (int i=0; i < availableOptions.size(); i++) {
      option=availableOptions.get(i);
      if (option.isBoolean()) {
        checkbox=(JCheckBox)optionComponents.get(i);
        value=checkbox.isSelected() ? "String_Node_Str" : "String_Node_Str";
      }
 else {
        dropdown=(JComboBox)optionComponents.get(i);
        value=(String)dropdown.getSelectedItem();
      }
      selectedOptions.put(option.getName(),value);
      log.info("String_Node_Str" + option.getName() + "String_Node_Str"+ value);
    }
  }
 else {
    GameOption option;
    String value;
    for (int i=0; i < availableOptions.size(); i++) {
      option=availableOptions.get(i);
      value=option.getDefaultValue();
      selectedOptions.put(option.getName(),value);
      log.info("String_Node_Str" + option.getName() + "String_Node_Str"+ value);
    }
  }
  game=new Game(gameName,playerNames,selectedOptions);
  if (!game.setup()) {
    JOptionPane.showMessageDialog(this,DisplayBuffer.get(),"String_Node_Str",JOptionPane.ERROR_MESSAGE);
    System.exit(-1);
  }
 else {
    String startError=game.start();
    if (startError != null) {
      JOptionPane.showMessageDialog(this,startError,"String_Node_Str",JOptionPane.ERROR_MESSAGE);
      System.exit(-1);
    }
    startGameUIManager(game);
    gameUIManager.gameUIInit(true);
  }
  this.setVisible(false);
}