Description:
------------
PHP 7 can run these scripts correctly.

PHP 8 reports error if the class has a `__toString` method.


Test script:
---------------
a.php:
<?php
require 'b.php';

class C
{
    // with this __toString method, 'b.php' can not find clas C
    public function __toString() { return ''; }
}

function test()
{
    return new C();
}
?>


b.php:
<?php
var_dump(test());
?>


Expected result:
----------------
Script can run without error.

Actual result:
--------------
PHP Fatal error:  Uncaught Error: Class "C" not found in /home/test/a.php:12
Stack trace:
#0 /home/test/b.php(2): test()
#1 /home/test/a.php(2): require('/home/test/b.ph...')
#2 {main}
  thrown in /home/test/a.php on line 12