[FLOW3-general] Argument is NULL

[René Zwinge]

Hello guys,
i read the tutorial and i work on my own project. I create a user-management section and i want to delete user, here the code:

Index.html:
<f:for each="{users}" as="user">
<f:link.action onclick="return confirm('Really delete this post?');" action="delete" arguments="{user: user}" controller="User">Delete</f:link.action> - {user.firstname} {user.lastname} | {user.userid}<br />
</f:for>

There is a deleteAction with an argument and an user object. The foreach is correct and show me all users.
When i click "Delete", then it comes this error:
#1269616784: The value of argument "user" must be of type "F3\Spirit\Domain\Model\User", but was of type "NULL".

Here my UserController.php:
/**
   * @inject
   * @var \F3\Spirit\Domain\Repository\UserRepository
   */
  protected $userRepository;
  
	/**
	 * Index action
   * The Index Action shows a list of all users
	 *
	 * @return void
	 */
	public function indexAction() {
	  if ($this->userRepository->findActive()===FALSE) {
      $user = $this->objectManager->create('F3\Spirit\Domain\Model\User');
      $user->setUserid(1);
      $user->setFirstname('Rene');
      $user->setLastname('Zwinge');
      $this->userRepository->add($user);
    }
     
    $users = $this->userRepository->findAll();
    
    $this->view->assign('users', $users);	
	}
  
  /**
   * Displays a form for creating a new user
   *
   * @param \F3\Spirit\Domain\Model\User $newUser A new user object
   * @return string An HTML form for creating a new user
   */
  public function newAction(\F3\Spirit\Domain\Model\User $newUser = NULL) {
    $this->view->assign('newUser', $newUser);
  }

  /**
   * Creates a new user
   *
   * @param \F3\Spirit\Domain\Model\User $newUser A fresh User object which has not yet been added to the repository
   * @return void
   */
  public function createAction(\F3\Spirit\Domain\Model\User $newUser) {
    $newUser->setUserid($newUser->generateUserid());
    $this->userRepository->add($newUser);
    $this->forward('index');
  }
  
  /**
   * Deletes a user
   *
   * @param \F3\Spirit\Domain\Model\User $user Delete this user object
   * @return void
   */
  public function deleteAction(\F3\Spirit\Domain\Model\User $user) {
    $this->userRepository->remove($user);
    $this->forward('index');
  }

It seems to me, that it is a bug.

Regards

Rene