Description:
------------
Inherited static properties shall be invariantly read from the same base source throughout the script life.

However assigning a reference to an inherited static property it stops being connected to their parent and this the child and the property stop sharing their common value.



Test script:
---------------
class Test {
    public static $x = 0;
}

class Test2 extends Test { }

Test2::$x = &$x;
$x = 1;
var_dump(Test::$x, Test2::$x);


Expected result:
----------------
int(1)
int(1)


Actual result:
--------------
int(0)
int(1)