Program: 56104
Project: 56104
Buggy source:
private void showXML(){
  StringBuilder builder=new StringBuilder("String_Node_Str");
  for (  RelativePoint tile : definition.getBlocked()) {
    builder.append("String_Node_Str");
    builder.append(tile.getDx());
    builder.append("String_Node_Str");
    builder.append(tile.getDy());
    builder.append("String_Node_Str");
  }
  for (  RelativePoint tile : definition.getJustProtected()) {
    builder.append("String_Node_Str");
    builder.append(tile.getDx());
    builder.append("String_Node_Str");
    builder.append(tile.getDy());
    builder.append("String_Node_Str");
  }
  RelativePoint door=definition.getDoor();
  builder.append("String_Node_Str");
  builder.append(door.getDx());
  builder.append("String_Node_Str");
  builder.append(door.getDy());
  builder.append("String_Node_Str");
  for (  RelativeStack stack : definition.getStacks()) {
    builder.append("String_Node_Str");
    builder.append(stack.getDx());
    builder.append("String_Node_Str");
    builder.append(stack.getDy());
    builder.append("String_Node_Str");
    builder.append(stack.getMaterialType().name());
    builder.append("String_Node_Str");
    builder.append(stack.requiredForBuild());
    builder.append("String_Node_Str");
  }
  for (  RelativeBricklayer bricklayer : definition.getBricklayers()) {
    builder.append("String_Node_Str");
    builder.append(bricklayer.getPosition().getDx());
    builder.append("String_Node_Str");
    builder.append(bricklayer.getPosition().getDy());
    builder.append("String_Node_Str");
    builder.append(bricklayer.getDirection());
    builder.append("String_Node_Str");
  }
  RelativePoint flag=definition.getFlag();
  builder.append("String_Node_Str");
  builder.append(flag.getDx());
  builder.append("String_Node_Str");
  builder.append(flag.getDy());
  builder.append("String_Node_Str");
  for (  RelativePoint mark : definition.getBuildmarks()) {
    builder.append("String_Node_Str");
    builder.append(mark.getDx());
    builder.append("String_Node_Str");
    builder.append(mark.getDy());
    builder.append("String_Node_Str");
  }
  JDialog dialog=new JDialog(window,"String_Node_Str");
  dialog.add(new JScrollPane(new JTextArea(builder.toString())));
  dialog.pack();
  dialog.setVisible(true);
}

Fixed version (ground truth):
private void showXML(){
  StringBuilder builder=new StringBuilder("String_Node_Str");
  for (  RelativePoint tile : definition.getBlocked()) {
    builder.append("String_Node_Str");
    builder.append(tile.getDx());
    builder.append("String_Node_Str");
    builder.append(tile.getDy());
    builder.append("String_Node_Str");
  }
  for (  RelativePoint tile : definition.getJustProtected()) {
    builder.append("String_Node_Str");
    builder.append(tile.getDx());
    builder.append("String_Node_Str");
    builder.append(tile.getDy());
    builder.append("String_Node_Str");
  }
  RelativePoint door=definition.getDoor();
  builder.append("String_Node_Str");
  builder.append(door.getDx());
  builder.append("String_Node_Str");
  builder.append(door.getDy());
  builder.append("String_Node_Str");
  for (  RelativeStack stack : definition.getStacks()) {
    builder.append("String_Node_Str");
    builder.append(stack.getDx());
    builder.append("String_Node_Str");
    builder.append(stack.getDy());
    builder.append("String_Node_Str");
    builder.append(stack.getMaterialType().name());
    builder.append("String_Node_Str");
    builder.append(stack.requiredForBuild());
    builder.append("String_Node_Str");
  }
  for (  RelativeBricklayer bricklayer : definition.getBricklayers()) {
    builder.append("String_Node_Str");
    builder.append(bricklayer.getPosition().getDx());
    builder.append("String_Node_Str");
    builder.append(bricklayer.getPosition().getDy());
    builder.append("String_Node_Str");
    builder.append(bricklayer.getDirection());
    builder.append("String_Node_Str");
  }
  RelativePoint flag=definition.getFlag();
  builder.append("String_Node_Str");
  builder.append(flag.getDx());
  builder.append("String_Node_Str");
  builder.append(flag.getDy());
  builder.append("String_Node_Str");
  for (  RelativePoint mark : definition.getBuildmarks()) {
    builder.append("String_Node_Str");
    builder.append(mark.getDx());
    builder.append("String_Node_Str");
    builder.append(mark.getDy());
    builder.append("String_Node_Str");
  }
  JDialog dialog=new JDialog(window,"String_Node_Str");
  dialog.add(new JScrollPane(new JTextArea(builder.toString())));
  dialog.setLocationRelativeTo(null);
  dialog.pack();
  dialog.setVisible(true);
}