Infinite loop in clean_dirsize_cache()

[raubvogel]

Since WP 5.6 there exsists

<?php
function clean_dirsize_cache( $path ){}

at functions.php:7725.
There we have

<?php
        while ( DIRECTORY_SEPARATOR !== $path && '.' !== $path && '..' !== $path ) {
                $path = dirname( $path );
                unset( $directory_cache[ $path ] );
        }

at functions.php:7735 which loops „forever“ if $path is something like c:\dir\subdir on Windows.

<?php
$path = dirname( $path );

returns the parent path in each step and gets „stuck“ at c:\.

[raubvogel]

Btw. this breaks the media upload in my WordPress because media upload calls clean_dirsize_cache().