Description:
------------
On Windows platform, I've noticed, but it seems to be older than just the recent release 2.0.9 ( 2.0.8 is also affected ), that :

The class Threaded appear twice on reflection ( all API ).



Test script:
---------------
In CLI mode :

php --re pthreads 

In other API :

<?php
$extension = new \ReflectionExtension('pthreads');
$classes   = $extension->getClassNames();

print_r($classes);
?>

Expected result:
----------------
Only once description of 

    Class [ <internal:pthreads> <iterateable> class Threaded implements Traversable, Countable ] {

}


Actual result:
--------------
Two same copy are visible in CLI mode.

In other API, you got 

Array
(
    [0] => Threaded
    [1] => Threaded
    [2] => Thread
    [3] => Worker
    [4] => Mutex
    [5] => Cond
    [6] => Collectable
    [7] => Pool
)