Ticket #37423: 37423.diff

src/wp-admin/includes/post.php

@@ -1300 +1300 @@
         $preview_target = '';
 
         if ( current_user_can( 'read_post', $post->ID ) ) {
-                if ( 'draft' === $post->post_status ) {
+                if ( 'draft' === $post->post_status || empty( $post->post_name ) ) {
                         $view_link = get_preview_post_link( $post );
                         $preview_target = " target='wp-preview-{$post->ID}'";
                 } else {
@@ -1307 +1307 @@
                         if ( 'publish' === $post->post_status || 'attachment' === $post->post_type ) {
                                 $view_link = get_permalink( $post );
                         } else {
-                                // Allow non-published (private, future) to be viewed at a pretty permalink.
+                                // Allow non-published (private, future) to be viewed at a pretty permalink, in case $post->post_name is set
                                 $view_link = str_replace( array( '%pagename%', '%postname%' ), $post->post_name, $permalink );
                         }
                 }