Ticket #44183: 44183.diff

class-wp.php

@@ -593 +593 @@
                         $GLOBALS['single'] = 1;
                 }
 
-                if ( $wp_query->is_author() && isset( $wp_query->post ) ) {
-                        $GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
+                if ( $wp_query->is_author() ){
+                        if( isset( $wp_query->post ) )
+                                $GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
+                        else
+                                $GLOBALS['authordata'] = get_userdata( get_queried_object()->ID );
                 }
         }