Description:
------------
A class that is derived from a class with a private constructor and which does not provide its own constructor, can call the private parent constructor through a static function.

Reproduce code:
---------------
<?php
class X
{
        public $x;
        private function __construct($x)
        {
                $this->x = $x;
        }
}

class Y extends X
{
        static public function cheat($x)
        {
                return new Y($x);
        }
}

$y = Y::cheat(5);
echo $y->x, PHP_EOL;

Expected result:
----------------
Fatal error: Call to private X::__construct() from invalid context ...

Actual result:
--------------
5