Program: 170232
Project: 170232
Buggy source:
void buildFontLists(){
  Font[] allfonts=GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
  LinkedList<String> llF=new LinkedList<String>();
  LinkedList<String> llG=new LinkedList<String>();
  for (int j=0; j < allfonts.length; j++) {
    llG.add(allfonts[j].getName());
    FontMetrics fontMetrics=driver.osg.getFontMetrics(allfonts[j]);
    if (fontMetrics.charWidth('i') == fontMetrics.charWidth('m'))     llF.add(allfonts[j].getName());
  }
  fixedFonts=new String[llF.size()];
  llF.toArray(fixedFonts);
  generalFonts=new String[llG.size()];
  llG.toArray(generalFonts);
  String prompt="String_Node_Str";
  popup=new JDialog(driver.frame,Dialog.ModalityType.APPLICATION_MODAL);
  popup.setFocusable(true);
  DrawFBP.applyOrientation(popup);
  popup.addWindowListener(new WindowAdapter(){
    public void windowClosing(    WindowEvent e){
      popup.dispose();
    }
  }
);
  popup.addKeyListener(new KeyAdapter(){
    public void keyPressed(    KeyEvent ev){
      if (ev.getKeyCode() == KeyEvent.VK_ESCAPE) {
        popup.dispose();
      }
    }
  }
);
  JPanel p=new JPanel();
  Box b1=new Box(BoxLayout.Y_AXIS);
  Box b2=new Box(BoxLayout.Y_AXIS);
  prompt="String_Node_Str";
  popup.setTitle(prompt);
  DrawFBP.applyOrientation(popup);
  p.setLayout(new BoxLayout(p,BoxLayout.X_AXIS));
  jlF=new JList<String>(fixedFonts);
  jlF.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  jlF.setLayoutOrientation(JList.VERTICAL);
  jlF.setCellRenderer(new CellRenderer());
  jlG=new JList<String>(generalFonts);
  jlG.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  jlG.setLayoutOrientation(JList.VERTICAL);
  jlG.setCellRenderer(new CellRenderer());
  lsF=new JScrollPane(jlF);
  lsF.setPreferredSize(new Dimension(800,800));
  lsG=new JScrollPane(jlG);
  lsG.setPreferredSize(new Dimension(800,800));
  fixedFont=driver.fixedFont;
  lb1=new JLabel("String_Node_Str" + fixedFont + "String_Node_Str");
  b1.add(lb1);
  b1.add(lsF);
  jlF.setSelectedValue(fixedFont,true);
  generalFont=driver.generalFont;
  lb2=new JLabel("String_Node_Str" + generalFont + "String_Node_Str");
  b2.add(lb2);
  b2.add(lsG);
  jlG.setSelectedValue(generalFont,true);
  p.add(b1);
  p.add(Box.createRigidArea(new Dimension(10,0)));
  p.add(b2);
  popup.add(p);
  jlF.addListSelectionListener(this);
  jlG.addListSelectionListener(this);
  lsF.revalidate();
  lsG.revalidate();
  popup.revalidate();
  lsF.repaint();
  lsG.repaint();
  popup.setLocation(50,100);
  popup.pack();
  popup.setVisible(true);
}

Fixed version (ground truth):
void buildFontLists(){
  Font[] allfonts=GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
  LinkedList<String> llF=new LinkedList<String>();
  LinkedList<String> llG=new LinkedList<String>();
  for (int j=0; j < allfonts.length; j++) {
    llG.add(allfonts[j].getName());
    FontMetrics fontMetrics=driver.osg.getFontMetrics(allfonts[j]);
    if (fontMetrics.charWidth('i') == fontMetrics.charWidth('m'))     llF.add(allfonts[j].getName());
  }
  fixedFonts=new String[llF.size()];
  llF.toArray(fixedFonts);
  generalFonts=new String[llG.size()];
  llG.toArray(generalFonts);
  String prompt="String_Node_Str";
  jDialog=new JDialog(driver.frame,Dialog.ModalityType.APPLICATION_MODAL);
  jDialog.setFocusable(true);
  DrawFBP.applyOrientation(jDialog);
  jDialog.addWindowListener(new WindowAdapter(){
    public void windowClosing(    WindowEvent e){
      jDialog.dispose();
    }
  }
);
  jDialog.addKeyListener(new KeyAdapter(){
    public void keyPressed(    KeyEvent ev){
      if (ev.getKeyCode() == KeyEvent.VK_ESCAPE) {
        jDialog.dispose();
      }
    }
  }
);
  JPanel p=new JPanel();
  Box b1=new Box(BoxLayout.Y_AXIS);
  Box b2=new Box(BoxLayout.Y_AXIS);
  prompt="String_Node_Str";
  jDialog.setTitle(prompt);
  DrawFBP.applyOrientation(jDialog);
  p.setLayout(new BoxLayout(p,BoxLayout.X_AXIS));
  jlF=new JList<String>(fixedFonts);
  jlF.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  jlF.setLayoutOrientation(JList.VERTICAL);
  jlF.setCellRenderer(new CellRenderer());
  jlG=new JList<String>(generalFonts);
  jlG.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  jlG.setLayoutOrientation(JList.VERTICAL);
  jlG.setCellRenderer(new CellRenderer());
  lsF=new JScrollPane(jlF);
  lsF.setPreferredSize(new Dimension(800,800));
  lsG=new JScrollPane(jlG);
  lsG.setPreferredSize(new Dimension(800,800));
  fixedFont=driver.fixedFont;
  lb1=new JLabel("String_Node_Str" + fixedFont + "String_Node_Str");
  b1.add(lb1);
  b1.add(lsF);
  jlF.setSelectedValue(fixedFont,true);
  generalFont=driver.generalFont;
  lb2=new JLabel("String_Node_Str" + generalFont + "String_Node_Str");
  b2.add(lb2);
  b2.add(lsG);
  jlG.setSelectedValue(generalFont,true);
  p.add(b1);
  p.add(Box.createRigidArea(new Dimension(10,0)));
  p.add(b2);
  jDialog.add(p);
  jlF.addListSelectionListener(this);
  jlG.addListSelectionListener(this);
  lsF.revalidate();
  lsG.revalidate();
  jDialog.revalidate();
  lsF.repaint();
  lsG.repaint();
  jDialog.setLocation(50,100);
  jDialog.pack();
  jDialog.setVisible(true);
}