[wp-trac] [WordPress Trac] #60052: Error when deleting media if default taxonomies have been removed

[WordPress Trac]

#60052: Error when deleting media if default taxonomies have been removed
--------------------------+-----------------------------
 Reporter:  imatoni       |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  6.4.2
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 Hello,

 I recently had a problem with deleting media from the media library.

 I received the following error message:

 2151#0: *203114 FastCGI sent in stderr: "PHP message: UM_TEST_ERROR_LOG
 PHP message: 63870
 PHP message: "category"
 PHP message: UM_TEST_ERROR_LOG
 PHP message: 63870
 PHP message: "post_tag"
 PHP message: PHP Fatal error: Uncaught TypeError: array_map(): Argument #2
 ($array) must be of type array, WP_Error given in /var/www/vhosts/fis-
 gmbh.de/stage.fis-gmbh.de/wp-includes/taxonomy.php:1964
 Stack trace:
 #0 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-
 includes/taxonomy.php(1964): array_map()
 #1 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-
 includes/post.php(6304): wp_delete_object_term_relationships()
 #2 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-
 includes/post.php(3416): wp_delete_attachment()
 #3 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-admin/includes/ajax-
 actions.php(886): wp_delete_post()
 #4 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-includes/class-wp-
 hook.php(324): wp_ajax_delete_post()
 #5 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-includes/class-wp-
 hook.php(348): WP_Hook->apply_filters()
 #6 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-
 includes/plugin.php(517): WP_Hook->do_action()
 #7 /var/www/vhosts/fis-gmbh.de/stage.fis-gmbh.de/wp-admin/admin-
 ajax.php(1" while reading response header from upstream


 This happened because we had used the following code elsewhere:
 add_action( 'init', 'deregister_tag' );
 function deregister_tag() {
 global $wp_taxonomies;
 $tax = 'post_tag';
 if ( taxonomy_exists( $tax ) ) {
 unset( $wp_taxonomies[ $tax ] );
 }
 }

 This code ensures that the standard WordPress taxonomy 'post_tag' is no
 longer present (this was not necessary for this project).

 In wp-includes/post.php there is the following call:
 wp_delete_object_term_relationships( $post_id, array( 'category',
 'post_tag' ) );
 This call causes an error to occur if the taxonomy 'post_tag' is not
 present.

 I am of the opinion that this error should be caught in the WordPress
 core.

 This issue is also being discussed here at WPML:
 https://wpml.org/forums/topic/fatal-error-when-deleting-a-media/

 Thank you.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/60052>
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