Description:
------------
If I make a MultipleIterator and override the current function with that : 

    public function current()
    {
        $this->current();
    }

I know that it's not a well code and this doesn't work and hasn't to be done but maybe it could have something else than a Segfault.

Test script:
---------------
class QuestionsIterator extends \MultipleIterator implements \Iterator {

    public function current()
    {
        $this->current();
    }
}

Expected result:
----------------
An error or an exception maybe

Actual result:
--------------
Segmentation Fault