Program: 16621
Project: 16621
Buggy source:
public void render(Component comp,Writer out) throws IOException {
  final WriterHelper wh=new WriterHelper(out);
  final Caption self=(Caption)comp;
  final String uuid=self.getUuid();
  final Execution exec=Executions.getCurrent();
  final String imgTag=self.getImgTag();
  if (self.isLegend()) {
    final String label=self.getLabel();
    wh.write("String_Node_Str").write(imgTag).write(XMLs.escapeXML(label));
    for (Iterator it=self.getChildren().iterator(); it.hasNext(); ) {
      final Component child=(Component)it.next();
      child.redraw(out);
    }
    wh.write("String_Node_Str");
  }
 else {
    final String clabel=self.getCompoundLabel();
    wh.write("String_Node_Str").write(uuid).write("String_Node_Str");
    wh.write("String_Node_Str").write(self.getOuterAttrs()).write(self.getInnerAttrs());
    wh.write("String_Node_Str");
    wh.write("String_Node_Str");
    wh.write("String_Node_Str").write(imgTag);
    if (clabel == null || clabel.trim().length() == 0) {
      wh.write("String_Node_Str");
    }
 else {
      wh.write(XMLs.escapeXML(clabel));
    }
    wh.write("String_Node_Str");
    wh.write("String_Node_Str").write(uuid).write("String_Node_Str");
    for (Iterator it=self.getChildren().iterator(); it.hasNext(); ) {
      final Component child=(Component)it.next();
      child.redraw(out);
    }
    if (self.isClosableVisible()) {
      wh.write("String_Node_Str").write(self.getParent().getUuid()).write("String_Node_Str");
      wh.write(exec.encodeURL("String_Node_Str")).write("String_Node_Str");
    }
    wh.writeln("String_Node_Str");
  }
}

Fixed version (ground truth):
public void render(Component comp,Writer out) throws IOException {
  final WriterHelper wh=new WriterHelper(out);
  final Caption self=(Caption)comp;
  final String uuid=self.getUuid();
  final Execution exec=Executions.getCurrent();
  final String imgTag=self.getImgTag();
  if (self.isLegend()) {
    final String label=self.getLabel();
    wh.write("String_Node_Str").write(imgTag).write(XMLs.escapeXML(label));
    for (Iterator it=self.getChildren().iterator(); it.hasNext(); ) {
      final Component child=(Component)it.next();
      child.redraw(out);
    }
    wh.write("String_Node_Str");
  }
 else {
    final String clabel=self.getCompoundLabel();
    wh.write("String_Node_Str").write(uuid).write("String_Node_Str");
    wh.write("String_Node_Str").write(self.getOuterAttrs()).write(self.getInnerAttrs());
    wh.write("String_Node_Str");
    wh.write("String_Node_Str");
    wh.write("String_Node_Str").write(imgTag);
    if (clabel == null || clabel.trim().length() == 0) {
      wh.write("String_Node_Str");
    }
 else {
      wh.write(XMLs.escapeXML(clabel));
    }
    wh.write("String_Node_Str");
    wh.write("String_Node_Str").write(uuid).write("String_Node_Str");
    for (Iterator it=self.getChildren().iterator(); it.hasNext(); ) {
      final Component child=(Component)it.next();
      child.redraw(out);
    }
    wh.write("String_Node_Str");
    if (self.isClosableVisible()) {
      wh.write("String_Node_Str").write(self.getParent().getUuid()).write("String_Node_Str");
      wh.write(exec.encodeURL("String_Node_Str")).write("String_Node_Str");
    }
    wh.writeln("String_Node_Str");
  }
}