Program: 104088
Project: 104088
Buggy source:
/** 
 * Receives options requests and replies with an OK response containing methods that we support.
 * @param requestEvent the incoming options request.
 */
public boolean processRequest(RequestEvent requestEvent){
  Response optionsOK=null;
  try {
    optionsOK=provider.getMessageFactory().createResponse(Response.OK,requestEvent.getRequest());
    Iterator<String> supportedMethods=provider.getSupportedMethods().iterator();
    while (supportedMethods.hasNext()) {
      String method=(String)supportedMethods.next();
      if (method.equals(Request.REGISTER))       continue;
      optionsOK.addHeader(provider.getHeaderFactory().createAllowHeader(method));
    }
    Iterator<String> events=provider.getKnownEventsList().iterator();
synchronized (provider.getKnownEventsList()) {
      while (events.hasNext()) {
        String event=events.next();
        optionsOK.addHeader(provider.getHeaderFactory().createAllowEventsHeader(event));
      }
    }
    optionsOK.setHeader(provider.getSipCommUserAgentHeader());
  }
 catch (  ParseException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
  try {
    ServerTransaction sTran=requestEvent.getServerTransaction();
    if (sTran == null) {
      SipProvider sipProvider=(SipProvider)requestEvent.getSource();
      sTran=sipProvider.getNewServerTransaction(requestEvent.getRequest());
    }
    sTran.sendResponse(optionsOK);
  }
 catch (  TransactionUnavailableException ex) {
    logger.info("String_Node_Str" + "String_Node_Str");
    logger.trace("String_Node_Str",ex);
    return false;
  }
catch (  InvalidArgumentException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
catch (  SipException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
  return true;
}

Fixed version (ground truth):
/** 
 * Receives options requests and replies with an OK response containing methods that we support.
 * @param requestEvent the incoming options request.
 */
public boolean processRequest(RequestEvent requestEvent){
  Response optionsOK=null;
  try {
    optionsOK=provider.getMessageFactory().createResponse(Response.OK,requestEvent.getRequest());
    Iterator<String> supportedMethods=provider.getSupportedMethods().iterator();
    while (supportedMethods.hasNext()) {
      String method=(String)supportedMethods.next();
      if (method.equals(Request.REGISTER))       continue;
      optionsOK.addHeader(provider.getHeaderFactory().createAllowHeader(method));
    }
    Iterator<String> events=provider.getKnownEventsList().iterator();
synchronized (provider.getKnownEventsList()) {
      while (events.hasNext()) {
        String event=events.next();
        optionsOK.addHeader(provider.getHeaderFactory().createAllowEventsHeader(event));
      }
    }
    optionsOK.setHeader(provider.getSipCommUserAgentHeader());
  }
 catch (  ParseException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
  try {
    SipStackSharing.getOrCreateServerTransaction(requestEvent).sendResponse(optionsOK);
  }
 catch (  TransactionUnavailableException ex) {
    logger.info("String_Node_Str" + "String_Node_Str");
    logger.trace("String_Node_Str",ex);
    return false;
  }
catch (  InvalidArgumentException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
catch (  SipException ex) {
    logger.warn("String_Node_Str",ex);
    return false;
  }
  return true;
}