"Delete Permantently" Only Deletes Original Size (UTF-8 file names)

[Pamela1991]

When deleting uploaded media files with UTF-8 file names, upon permanently deleting these files, only the original full size image is deleted, whereas all re-sized variants are not deleted.

Steps to reproduce this issue:

1. Upload New Media file titled صورة.jpg via ​http://domain.com/wp-admin/media-new.php
2. Delete Permanently from Media Library
3. Navigate to FTP directory and only the original full-size picture will have been deleted. All re-sized versions remain.

There is a similar ticket, but it is incorrectly titled/described as being an issue with diacritics in filename. However, this is a UTF-8 problem.

I tried modifying wp_delete_attachment() in post.php by changing the following lines to no avail:

<?php
4703     $meta = utf8_encode(wp_get_attachment_metadata( $post_id ));
4704     $backup_sizes = utf8_encode(get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true ));
4752     $thumbfile = mb_ereg_replace(basename($file), $meta['thumb'], $file);
4762     $intermediate_file = mb_ereg_replace( basename( $file ), $sizeinfo['file'], $file );

[swissspidy]

Hey there, tanks for creating this ticket!

Since it's basically the same issue as in #33227 we should combine efforts there.