Description:
------------
When calling a method that exists only in the parent class with Reflection, the 
incorrect class is used.

This bug is highly related to #53742, but has a different test case. The root 
cause may be exactly the same.

Test script:
---------------
abstract class A {

	const WHAT = 'wrong';

	public static function call() {
		echo static::WHAT;
	}

}

class B extends A {

	const WHAT = 'correct';

}

B::call();

$class = new ReflectionClass('B');
$class->getMethod('call')->invoke(null);


Expected result:
----------------
"correct"

Actual result:
--------------
"wrong"