Description:
------------
The var_dump() function doesn't detect recursion properly(aka the first time).
The code sample will show that var_dump() will print de "second" twice instead 
of once like in print_r().

This goes terribly wrong with large var_dumps with multiple recursion.
print_r() needed 5MiB memory for my dump. and var_dump() needed more than the  
ini_set("memory_limit", "1G") I applied. 

Code for generating a big dump.
class IndexController extends Zend_Controller_Action {
    public function indexAction() {
        var_dump($this->_helpers);
    }
}



Test script:
---------------
<?php
$array = array(
	'first' => array(),
);
$array['first']['second'] = &$array['first'];
echo "<pre>\n";
var_dump($array);
echo "\n\n";
print_r($array);
echo "<pre>\n";
?>


Expected result:
----------------
<pre>
array(1) {
  ["first"]=>
  &array(1) {
    ["second"]=>
    *RECURSION*
  }
}


Array
(
    [first] => Array
        (
            [second] => Array
 *RECURSION*
        )

)

Actual result:
--------------
<pre>
array(1) {
  ["first"]=>
  &array(1) {
    ["second"]=>
    &array(1) {
      ["second"]=>
      *RECURSION*
    }
  }
}


Array
(
    [first] => Array
        (
            [second] => Array
 *RECURSION*
        )

)