[wp-trac] [WordPress Trac] #62776: Non-latin post type rewrite slugs break post editor since 6.7

[WordPress Trac]

#62776: Non-latin post type rewrite slugs break post editor since 6.7
--------------------------+-----------------------------
 Reporter:  terraling     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  6.7
 Severity:  major         |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 If you register a CPT with a rewrite slug that uses non-latin characters
 then when you click a back-end link to edit such a post the editor fails
 to load and displays a message "You attempted to edit an item that doesn't
 exist. Perhaps it was deleted?".

 Does not happen in WordPress 6.6.2, happens in WordPress 6.7+

 Only occurs with the Block Editor, does not occur with the Classic Editor.

 The message comes from the Editor function in wp-
 includes/js/dist/editor.js (the code is too opaque for me to spot what
 exactly is the cause).

 To reproduce, register a CPT that uses non-latin characters in the rewrite
 slug (in my example I'm using Ukranian, but the same applies with
 languages like Chinese or Hebrew), e.g.:

 {{{#!php
 <?php
 function wporg_custom_post_type()
 {
     $recipe_labels = array(
         'name' => __('Recipes', 'asif'),
         'singular_name' => __('Recipe', 'asif'),
         'add_new' => __('New Recipe', 'asif'),
         'add_new_item' => __('Add New Recipe', 'asif'),
         'edit_item' => __('Edit Recipe', 'asif'),
         'new_item' => __('New Recipe', 'asif'),
         'view_item' => __('View Recipe', 'asif'),
         'search_items' => __('Search Recipes', 'asif'),
         'not_found' => __('No Recipes Found', 'asif'),
         'not_found_in_trash' => __('No Recipes found in Trash', 'asif'),
     );

     $recipe_args = array(
         'labels' => $recipe_labels,
         'public' => true,
         'rewrite' => array('slug' => 'рецепт'), // non-Latin slug
         'show_in_rest' => true,
     );

     register_post_type('recipe', $recipe_args);
 }
 add_action('init', 'wporg_custom_post_type');
 }}}

 Publish a post of that post type, go to the list of posts (e.g. Dashboard
 > Recipes) then click the edit link to edit the post.

 (Note, I had already created a test post before upgrading to WP 6.7; I
 don't know if you can publish a post with a non-Latin rewrite slug if you
 are already on WP 6.7, but if not you could temporarily use Classic
 Editor.)

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/62776>
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