Ticket #20064: 20064.patch

wp-admin/post.php

@@ -134 +134 @@
         if ( empty($post->ID) )
                 wp_die( __('You attempted to edit an item that doesn’t exist. Perhaps it was deleted?') );
 
+        if ( null == $post_type_object || ( $post->post_type == 'revision' && post_type_exists( get_post_type( $post->post_parent ) ) == false ) )
+                wp_die( __('Unknown post type.') );
+
         if ( !current_user_can($post_type_object->cap->edit_post, $post_id) )
                 wp_die( __('You are not allowed to edit this item.') );
 
         if ( 'trash' == $post->post_status )
                 wp_die( __('You can’t edit this item because it is in the Trash. Please restore it and try again.') );
 
-        if ( null == $post_type_object )
-                wp_die( __('Unknown post type.') );
-
         $post_type = $post->post_type;
         if ( 'post' == $post_type ) {
                 $parent_file = "edit.php";