PHP 5.5 crash

<?php

class Test {

  private $f = NULL;

  public function addFunction( callable $f ) {
    if ($this->f === NULL) {
      $this->f = $f;
    }
    else {
      $this->f = function() use ($f){
        $args = func_get_args();
        return call_user_func_array( $this->f, $args ) &&
        call_user_func_array( $f, $args );
      };
    }
  }

  public function apply() {
    $args = func_get_args();
    call_user_func_array( $this->f, $args );
  }

}

$t = new Test();
$t->addFunction( function($x){ return $x; } );
$t->addFunction( function($x){ return $x; } );
$t->apply(TRUE);

?>