Inconsistency between HipHop Virtual Machine and Zend PHP

README

inez@ubuntu:/var/www/mw/tests/phpunit/aa$ sudo /home/inez/HH/dev/hiphop-php/src/hhvm/hhvm Autoload.php 
Second loader!
object(A)#3 (0) {
}
inez@ubuntu:/var/www/mw/tests/phpunit/aa$ php Autoload.php 
First loader!
object(A)#3 (0) {
}
inez@ubuntu:/var/www/mw/tests/phpunit/aa$ 

A.class.php

<?php
class A {
}

Autoload.php

<?php

spl_autoload_register(function ($class) {
    echo "First loader!\n";
    include $class . '.class.php';
});

spl_autoload_register(function ($class) {
    echo "Second loader!\n";
    include $class . '.class.php';
});

var_dump(new A());