Description:
------------
Filtering an object which implements Iterator produces the error below, but an ArrayIterator works fine.





Reproduce code:
---------------
<?
class Collection implements Iterator {
	
	protected $array, $valid = false;
	
	public function __construct(array $a) { $this->array = $a; }
	
	public function current() { return current($this->array); }
	public function key() { return key($this->array); }
	public function next() { $this->valid = (false !== next($this->array)); }
	public function valid() { return $this->valid; }
	public function rewind() { $this->valid = (false !== reset($this->array)); }
}

class TestFilter extends FilterIterator {
    public function accept() { throw new Exception("Me crash!"); }
}

$test = new TestFilter( new Collection(array(0)) );

foreach ($test as $item) {
	echo $item;
}
?>

Expected result:
----------------
Uncaught exception message.

Actual result:
--------------
From CLI:
Fatal error: Couldn't execute method Collection::next in Unknown on line 0.

As a httpd module it only prints garbage characters on screen.