[wp-trac] [WordPress Trac] #51081: Fatal Error - Undefined get_page_templates() in Customizer

[WordPress Trac]

#51081: Fatal Error - Undefined get_page_templates() in Customizer
--------------------------------------+-----------------------------
 Reporter:  Howdy_McGee               |      Owner:  (none)
     Type:  defect (bug)              |     Status:  new
 Priority:  normal                    |  Milestone:  Awaiting Review
Component:  Customize                 |    Version:  5.5
 Severity:  normal                    |   Keywords:
  Focuses:  administration, template  |
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 I'm using the `display_post_states` filter hook to display assigned page
 templates as "Post State" whenever they're listed. WordPress 5.5 breaks
 this functionality when viewing The Customizer. The easiest way to
 replicate this issue is to paste the following into any TwentyXX Theme:


 {{{
 /**
  * Add assigned templates to Post States
  * - https://developer.wordpress.org/reference/hooks/display_post_states/
  *
  * @param Array $post_states
  *
  * @return Array $post_states
  */
 function prefix_page_template_labels( $post_states ) {

         $page_templates = get_page_templates();
         return $post_states;

 }
 add_filter( 'display_post_states', 'prefix_page_template_labels' );
 }}}

 At this point, when you go to The Customizer it throws a Fatal Error as
 `get_page_templates()` is not defined.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51081>
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