Description:
------------
I'm not sure if I'm using ArrayObject correctly (I thought you could use the primitive type 'array' directly to fetch iterators initially but it seems that's not the case), but I can't tell due to the lack of documentation ...

All latest service packs/patches are installed.



Reproduce code:
---------------
class StudentList implements IteratorAggregate
{
	private $students;
	
	public function __construct() {
		$this->students = new ArrayObject( array() );
	}
	
	public function add( Student $student ) {
		if( !$this->contains( $student ) ) {
                        // XXXX: this causes the crash!
			$this->students[] = $student;
		}
	}

        // ... snip ...

	public function getIterator() {
		return $this->students->getIterator();
	}
}

$students = new StudentList();
$students->add( new Student( '01234123', 'Joe', 'Blo', 'j.blo@here.com' ) );
$students->add( new Student( '00000014', 'Bob', 'Moe', 'b.moe@qut.edu.au' ) );

foreach( $students as $student ) {
	echo $student->getId(); // first parameter passed to the above constructors
}


Expected result:
----------------
This should print out "0123412300000014".

Actual result:
--------------
The Apache 2 service crashes hard.

Resolved by:

public function __construct() {
  $this->students = array();
}

// ... snip ...

public function getIterator() {
  $arr = new ArrayObject( $this->students );
  return $arr->getIterator();
}

Using this code, the expected result is printed out.