Program: 74259
Project: 74259
Buggy source:
/** 
 * Produce outputs (if appropriate).
 * @exception IllegalActionException If production of an outputfails (e.g. type error), or if this thread is interrupted while we are waiting for output to produce.
 */
public synchronized void fire() throws IllegalActionException {
  if (_exception != null) {
    throw new IllegalActionException(ThreadedComposite.this,_exception,"String_Node_Str");
  }
  Time environmentTime=ThreadedComposite.this.getExecutiveDirector().getModelTime();
  if (ThreadedComposite.this._debugging) {
    ThreadedComposite.this._debug("String_Node_Str" + environmentTime);
  }
  Time nextOutputTime=_outputTimes.peek();
  if (environmentTime.equals(nextOutputTime)) {
    nextOutputTime=_outputTimes.poll();
    try {
      while (_outputFrames.isEmpty() && !_stopRequested) {
        if (ThreadedComposite.this._debugging) {
          ThreadedComposite.this._debug("String_Node_Str");
        }
        wait(1000L);
      }
      if (_outputFrames.isEmpty()) {
        return;
      }
      TokenFrame frame=_outputFrames.poll();
      if (ThreadedComposite.this._debugging) {
        ThreadedComposite.this._debug("String_Node_Str");
      }
      for (      QueuedToken token : frame.tokens) {
        if (token.channel < token.port.getWidth()) {
          if (ThreadedComposite.this._debugging) {
            ThreadedComposite.this._debug("String_Node_Str",token + "String_Node_Str" + token.port.getName());
          }
          token.port.send(token.channel,token.token);
        }
      }
    }
 catch (    InterruptedException ex) {
      throw new IllegalActionException(ThreadedComposite.this,ex,"String_Node_Str");
    }
  }
}

Fixed version (ground truth):
/** 
 * Produce outputs (if appropriate).
 * @exception IllegalActionException If production of an outputfails (e.g. type error), or if this thread is interrupted while we are waiting for output to produce.
 */
public synchronized void fire() throws IllegalActionException {
  if (_exception != null) {
    throw new IllegalActionException(ThreadedComposite.this,_exception,"String_Node_Str");
  }
  Time environmentTime=ThreadedComposite.this.getExecutiveDirector().getModelTime();
  if (ThreadedComposite.this._debugging) {
    ThreadedComposite.this._debug("String_Node_Str" + environmentTime);
  }
  Time nextOutputTime=_outputTimes.peek();
  if (environmentTime.equals(nextOutputTime)) {
    nextOutputTime=_outputTimes.poll();
    try {
      while (_outputFrames.isEmpty() && !_stopRequested) {
        if (ThreadedComposite.this._debugging) {
          ThreadedComposite.this._debug("String_Node_Str");
        }
        wait(1000L);
      }
      if (_outputFrames.isEmpty()) {
        return;
      }
      TokenFrame frame=_outputFrames.poll();
      if (ThreadedComposite.this._debugging) {
        ThreadedComposite.this._debug("String_Node_Str");
      }
      if (frame.tokens == null) {
        throw new IllegalActionException(this,"String_Node_Str");
      }
      for (      QueuedToken token : frame.tokens) {
        if (token.channel < token.port.getWidth()) {
          if (ThreadedComposite.this._debugging) {
            ThreadedComposite.this._debug("String_Node_Str",token + "String_Node_Str" + token.port.getName());
          }
          token.port.send(token.channel,token.token);
        }
      }
    }
 catch (    InterruptedException ex) {
      throw new IllegalActionException(ThreadedComposite.this,ex,"String_Node_Str");
    }
  }
}