Description:
------------
php -d opcache.preload=preload.php script.php

preload.php:
<?php 
class A {
    const C = UNRESOLVED;
}
class B extends A {
    const C = 42;
}


script.php:
<?php
var_dump(class_exists(A::class));
var_dump((new ReflectionClass(B::class))->getParentClass()->newInstance());

Class A will be removed from the preload state because it has unresolved initializers. However in the meantime B has already been linked, which is preloaded. The end result is that class B has a missing parent class when preloaded.