Ticket #36437: 36437.patch

wp-includes/post.php

@@ -4716 +4716 @@
          */
         do_action( 'delete_attachment', $post_id );
 
-        wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
-        wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));
+        if ( ( ! empty( $attachment_taxonomies = get_object_taxonomies( $post->post_type ) ) ) ) {
+                wp_delete_object_term_relationships( $post_id, $attachment_taxonomies );
+        }
 
         // Delete all for any posts.
         delete_metadata( 'post', null, '_thumbnail_id', $post_id, true );