[wp-trac] [WordPress Trac] #55917: Fatal error in WP6.0 when calling get_current_screen on the pre_get_posts action

[WordPress Trac]

#55917: Fatal error in WP6.0 when calling get_current_screen on the pre_get_posts
action
----------------------------+-----------------------------
 Reporter:  lumpysimon      |      Owner:  (none)
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Administration  |    Version:  6.0
 Severity:  normal          |   Keywords:
  Focuses:  administration  |
----------------------------+-----------------------------
 In 5.9 and earlier versions, it's possible to call `get_current_screen`
 from within a function that runs on the `pre_get_posts` hook. But in
 version 6.0 it causes a fatal error `Call to undefined function
 get_current_screen()`.

 {{{
 add_action( 'pre_get_posts', 'abcdef_sort_posts' );

 function abcdef_sort_posts( $query ) {

         if ( wp_doing_ajax() ) {
                 return;
         }

         if ( ! is_admin() ) {
                 return;
         }

         $screen = get_current_screen();

         if ( 'edit-page' == $screen->id ) {

                 $query->set( 'orderby', 'post_title' );
                 $query->set( 'order', 'DESC' );

         }

 }
 }}}

 I came across the issue on two sites, I can reproduce it by installing 5.9
 with no plugins enabled, adding the above code in a plugin or
 `functions.php`, everything works fine, then upgrading to 6.0 and visiting
 any admin screen causes the fatal error. Front-end is fine.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/55917>
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