Description:
------------
When setting an a particular array element to the array itself, results are different when it's inside a function vs outside the function.

Reproduce code:
---------------
function func()
{
    $a[1] = '1';
    $a[0] = $a;
    var_dump($a);
}

func();

$a[1] = '1';
$a[0] = $a;
var_dump($a);

Expected result:
----------------
I'm not sure what to expect but at the vary least, the results should be consistent.  Results were consistent in 5.2.1.

array(2) {
  [1]=>
  string(1) "1"
  [0]=>
  array(1) {
    [1]=>
    string(1) "1"
  }
}
array(2) {
  [1]=>
  string(1) "1"
  [0]=>
  array(1) {
    [1]=>
    string(1) "1"
  }
}


Actual result:
--------------
array(2) {
  [1]=>
  string(1) "1"
  [0]=>
  NULL
}
array(2) {
  [1]=>
  string(1) "1"
  [0]=>
  array(1) {
    [1]=>
    string(1) "1"
  }
}