[wp-trac] [WordPress Trac] #44127: editing an image can result in intermediate sized images left over after the image is deleted

[WordPress Trac]

#44127: editing an image can result in intermediate sized images left over after
the image is deleted
--------------------------+-----------------------------
 Reporter:  pbiron        |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  4.9.5
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Steps to reproduce:

 1. set thumbnail_size to `150x150`
 1. upload a `300x300` image, e.g., `foo.jpg`
   * will result in `/wp-content/uploads/foo-150x150.jpg` being generated
 1. edit the image and scale to `200x200`
   * will result in something like `/wp-
 content/uploads/foo-e1526583456941.jpg` being generated
   * `/wp-content/uploads/foo-150x150.jpg` will still be present, since it
 is still a valid thumbnail for the scaled image
 1. regenerate intermediate sized images (e.g., by calling
 [[https://developer.wordpress.org/reference/functions/wp_get_attachment_metadata/|wp_get_attachment_metadata()]]
 followed by
 [[https://developer.wordpress.org/reference/functions/wp_update_attachment_metadata/|wp_update_attachment_metadata()]],
 which the [[https://wordpress.org/plugins/regenerate-
 thumbnails/|Regenerate Thumbnails]] plugin does)
   * will result in something like `/wp-
 content/uploads/foo-e1526583456941-150x150.jpg` being generated
 1. "Delete Permanently" the image

 Check `/wp-content/uploads` and you will see that `foo-150x150.jpg` is
 still there.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44127>
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