Description:
------------
two var_dump() calls right after each other print something
different, even though they're given the same argument




Reproduce code:
---------------
<?php 
$b = array(); 
$b[1] =& $b; 
$b =& $b; 
var_dump($b); 
var_dump($b); 
?>


Expected result:
----------------
array(1) {
  [1]=>
  &array(1) {
    [1]=>
    *RECURSION*
  }
}
array(1) {
  [1]=>
  &array(1) {
    [1]=>
    *RECURSION*
  }
}


Actual result:
--------------
array(1) {
  [1]=>
  &array(1) {
    [1]=>
    &array(1) {
      [1]=>
      *RECURSION*
    }
  }
}
array(1) {
  [1]=>
  array(1) {
    [1]=>
    *RECURSION*
  }
}