Description:
------------
In the following code, the exception is not caught.  In PHP 5.3, the exception is caught, but in PHP 5.4 and PHP 5.5, the exception is not caught.  The issue only occurs when the class is in a namespace.  If I remove the namespace from the class, then the exception is caught.


Test script:
---------------
<?php
function __autoload($class)
{
    require('ns_test.php');

    throw new \Exception('abcd');
}

try
{
    \ns_test\test::go();
}
catch (Exception $e)
{
    echo 'caught';
    exit;
}

=================================================

ns_test.php:

<?php
namespace ns_test;

class test
{

}


Expected result:
----------------
caught

Actual result:
--------------
Warning: Uncaught exception 'Exception' with message 'abcd' in /tmp/test.php:6
Stack trace:
#0 /tmp/test.php(11): __autoload('ns_test\test')
#1 {main}
  thrown in /tmp/test.php on line 6

Fatal error: Call to undefined method ns_test\test::go() in /tmp/test.php on line 11