Program: 104376
Project: 104376
Buggy source:
/** 
 * Joins the given chat room and manages all the exceptions that could occur during the join process.
 * @param chatRoom the chat room to join
 */
public void joinChatRoom(ChatRoom chatRoom){
  try {
    chatRoom.join();
    ChatRoomsList chatRoomList=mainFrame.getChatRoomsListPanel().getChatRoomsList();
    ChatRoomWrapper chatRoomWrapper=chatRoomList.findChatRoomWrapperFromChatRoom(chatRoom);
    if (chatRoomWrapper == null) {
      chatRoomWrapper=new ChatRoomWrapper(chatRoom);
      chatRoomList.addChatRoom(chatRoomWrapper);
    }
    ConfigurationManager.updateChatRoomStatus(chatRoomWrapper.getParentProvider(),chatRoomWrapper.getChatRoomID(),Constants.ONLINE_STATUS);
  }
 catch (  OperationFailedException e) {
    if (e.getErrorCode() == OperationFailedException.AUTHENTICATION_FAILED) {
      ChatRoomAuthenticationWindow authWindow=new ChatRoomAuthenticationWindow(mainFrame,chatRoom);
      authWindow.setVisible(true);
    }
 else     if (e.getErrorCode() == OperationFailedException.REGISTRATION_REQUIRED) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e,Messages.getI18NString("String_Node_Str").getText()).showDialog();
    }
 else     if (e.getErrorCode() == OperationFailedException.PROVIDER_NOT_REGISTERED) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e,Messages.getI18NString("String_Node_Str").getText()).showDialog();
    }
 else     if (e.getErrorCode() == OperationFailedException.SUBSCRIPTION_ALREADY_EXISTS) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e,Messages.getI18NString("String_Node_Str").getText()).showDialog();
    }
 else {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e,Messages.getI18NString("String_Node_Str").getText()).showDialog();
    }
    logger.error("String_Node_Str" + chatRoom.getName(),e);
  }
}

Fixed version (ground truth):
/** 
 * Joins the given chat room and manages all the exceptions that could occur during the join process.
 * @param chatRoom the chat room to join
 */
public void joinChatRoom(ChatRoom chatRoom){
  try {
    chatRoom.join();
    ChatRoomsList chatRoomList=mainFrame.getChatRoomsListPanel().getChatRoomsList();
    ChatRoomWrapper chatRoomWrapper=chatRoomList.findChatRoomWrapperFromChatRoom(chatRoom);
    if (chatRoomWrapper == null) {
      chatRoomWrapper=new ChatRoomWrapper(chatRoom);
      chatRoomList.addChatRoom(chatRoomWrapper);
    }
    ConfigurationManager.updateChatRoomStatus(chatRoomWrapper.getParentProvider(),chatRoomWrapper.getChatRoomID(),Constants.ONLINE_STATUS);
  }
 catch (  OperationFailedException e) {
    if (e.getErrorCode() == OperationFailedException.AUTHENTICATION_FAILED) {
      ChatRoomAuthenticationWindow authWindow=new ChatRoomAuthenticationWindow(mainFrame,chatRoom);
      authWindow.setVisible(true);
    }
 else     if (e.getErrorCode() == OperationFailedException.REGISTRATION_REQUIRED) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str").getText(),Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e).showDialog();
    }
 else     if (e.getErrorCode() == OperationFailedException.PROVIDER_NOT_REGISTERED) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str").getText(),Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e).showDialog();
    }
 else     if (e.getErrorCode() == OperationFailedException.SUBSCRIPTION_ALREADY_EXISTS) {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str").getText(),Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e).showDialog();
    }
 else {
      new ErrorDialog(mainFrame,Messages.getI18NString("String_Node_Str").getText(),Messages.getI18NString("String_Node_Str",new String[]{chatRoom.getName()}).getText(),e).showDialog();
    }
    logger.error("String_Node_Str" + chatRoom.getName(),e);
  }
}