Program: 74191
Project: 74191
Buggy source:
/** 
 * Parse the command-line arguments.
 * @param args The command-line arguments to be parsed.
 * @exception Exception If an argument is not understood or triggersan error.
 */
protected void _parseArgs(String[] args) throws Exception {
  for (int i=0; i < args.length; i++) {
    String arg=args[i];
    if (_parseArg(arg) == false) {
      if (arg.trim().startsWith("String_Node_Str")) {
        if (i >= (args.length - 1)) {
          throw new IllegalActionException("String_Node_Str" + "String_Node_Str" + arg + "String_Node_Str"+ "String_Node_Str");
        }
        _parameterNames.add(arg.substring(1));
        _parameterValues.add(args[i + 1]);
        i++;
      }
 else {
        throw new IllegalActionException("String_Node_Str" + arg);
      }
    }
  }
  if (_expectingClass) {
    throw new IllegalActionException("String_Node_Str");
  }
  Iterator names=_parameterNames.iterator();
  Iterator values=_parameterValues.iterator();
  while (names.hasNext() && values.hasNext()) {
    String name=(String)names.next();
    String value=(String)values.next();
    boolean match=false;
    NamedObj model=_toplevel;
    System.out.println("String_Node_Str" + model.getFullName());
    Attribute attribute=model.getAttribute(name);
    if (attribute instanceof Settable) {
      match=true;
      ((Settable)attribute).setExpression(value);
      if (attribute instanceof Variable) {
        ((Variable)attribute).getToken();
      }
    }
    if (model instanceof CompositeActor) {
      Director director=((CompositeActor)model).getDirector();
      if (director != null) {
        attribute=director.getAttribute(name);
        if (attribute instanceof Settable) {
          match=true;
          ((Settable)attribute).setExpression(value);
          if (attribute instanceof Variable) {
            ((Variable)attribute).getToken();
          }
        }
      }
    }
    if (!match) {
      throw new IllegalActionException("String_Node_Str" + "String_Node_Str" + name);
    }
  }
}

Fixed version (ground truth):
/** 
 * Parse the command-line arguments.
 * @param args The command-line arguments to be parsed.
 * @exception Exception If an argument is not understood or triggersan error.
 */
protected void _parseArgs(String[] args) throws Exception {
  for (int i=0; i < args.length; i++) {
    String arg=args[i];
    if (_parseArg(arg) == false) {
      if (arg.trim().startsWith("String_Node_Str")) {
        if (i >= (args.length - 1)) {
          throw new IllegalActionException("String_Node_Str" + "String_Node_Str" + arg + "String_Node_Str"+ "String_Node_Str");
        }
        _parameterNames.add(arg.substring(1));
        _parameterValues.add(args[i + 1]);
        i++;
      }
 else {
        throw new IllegalActionException("String_Node_Str" + arg);
      }
    }
  }
  if (_expectingClass) {
    throw new IllegalActionException("String_Node_Str");
  }
  Iterator<String> names=_parameterNames.iterator();
  Iterator<String> values=_parameterValues.iterator();
  while (names.hasNext() && values.hasNext()) {
    String name=names.next();
    String value=values.next();
    boolean match=false;
    CompositeActor model=_toplevel;
    System.out.println("String_Node_Str" + model.getFullName());
    Attribute attribute=model.getAttribute(name);
    if (attribute instanceof Settable) {
      match=true;
      ((Settable)attribute).setExpression(value);
      if (attribute instanceof Variable) {
        ((Variable)attribute).getToken();
      }
    }
    Director director=model.getDirector();
    if (director != null) {
      attribute=director.getAttribute(name);
      if (attribute instanceof Settable) {
        match=true;
        ((Settable)attribute).setExpression(value);
        if (attribute instanceof Variable) {
          ((Variable)attribute).getToken();
        }
      }
    }
    if (!match) {
      throw new IllegalActionException("String_Node_Str" + "String_Node_Str" + name);
    }
  }
}