Description:
------------
when extending a class that has both a protected method, and a __call - certain call_user_func calls will end up in __call instead of the protected method - see https://3v4l.org/4El6Z

Test script:
---------------
<?php

class A
{
	protected function _x()
	{
		echo "a";
	}

	public function __call($methodName, array $arguments)
	{
		throw new Exception("Unknown method.");
	}
}

class B extends A
{
	public function x()
	{
		parent::_x(); # works
		call_user_func('parent::_x'); # works
		call_user_func(['parent', '_x']); # fails
	}
}

$b = new B;
$b->x();

Expected result:
----------------
aaa

Actual result:
--------------
aa Exception