Ticket #39321: 39321.patch

src/wp-includes/link-template.php

@@ -162 +162 @@
          */
         $permalink = apply_filters( 'pre_post_link', $permalink, $post, $leavename );
 
-        if ( '' != $permalink && !in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft', 'future' ) ) ) {
+        if ( '' != $permalink && !in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft', 'future', 'inherit' ) ) ) {
                 $unixtime = strtotime($post->post_date);
 
                 $category = '';
@@ -200 +200 @@
                 }
 
                 $author = '';
-                if ( strpos($permalink, '%author%') !== false ) {
-                        $authordata = get_userdata($post->post_author);
-                        $author = $authordata->user_nicename;
+                if ( false !== strpos( $permalink, '%author%' ) ) {
+                        $authordata = get_userdata( $post->post_author );
+                        if ( is_a( $authordata, 'WP_User' ) ) {
+                                $author = $authordata->user_nicename;
+                        }
                 }
 
                 $date = explode(" ",date('Y m d H i s', $unixtime));