Description:
------------
Starting with php 5.2, objects are destroyed before output buffer handlers are called.

Reproduce code:
---------------
class foo
{
  function bar()
  {
  }
}

$GLOBALS['fb'] =& new foo;

function foo_bar($buffer)
{
  $GLOBALS['fb']->bar();
  return $buffer;
}

ob_start('foo_bar');

Expected result:
----------------
The code should not spit an error due to the $fb object not being initialized, as was the case prior to php 5.2.

Actual result:
--------------
PHP Fatal error: Call to a member function bar() on a non-object