call_user_func special function optimization unsound with strict_types

Description

The following code:

<?php
declare(strict_types=1);

namespace Foo;

// strlen() will be called with strict_types=0, so this is legal.
var_dump(call_user_func('strlen', false));

// Called with strict_types=1
var_dump(\call_user_func('strlen', false));

Resulted in this output:

int(0)

Fatal error: Uncaught TypeError: strlen(): Argument #1 ($string) must be of type string, false given in /in/bcCZ4:10
Stack trace:
#0 /in/bcCZ4(10): strlen(false)
#1 {main}
  thrown in /in/bcCZ4 on line 10

But I expected this output instead:

Well, not sure, it should be consistent I suppose

PHP Version

8.3+

Operating System

No response

Comienza con el reproducer proporcionado para PHP 8.3+ y compara las rutas de llamada namespaced y fully qualified de call_user_func con strict_types=1. Sigue la optimización de funciones especiales en el intérprete de PHP, haz que el comportamiento sea coherente y añade cobertura para ambas llamadas.