"internal error" in ReflectionParameter::getDefaultValue on Variable-length argument list

[divinity76]

Description

The following code:

<?php
declare(strict_types=1);
function f(...$args){
    echo "see? arguments are optional.\n";
}
f();
$ref = new ReflectionFunction('f');
var_dump($ref->getParameters()[0]->getDefaultValue());

Resulted in this output:

see? arguments are optional.

Fatal error: Uncaught ReflectionException: Internal error: Failed to retrieve the default value in /in/gHhJ2:8
Stack trace:
#0 /in/gHhJ2(8): ReflectionParameter->getDefaultValue()
#1 {main}
  thrown in /in/gHhJ2 on line 8

But I expected this output instead:

see? arguments are optional.
array(0) {
}

3v4l: https://3v4l.org/gHhJ2

PHP Version

8.2.11

Operating System

windows 10