Ticket #44183: 44183.3.diff

src/wp-includes/class-wp.php

@@ -597 +597 @@
                         $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() ) {
+                        $GLOBALS['authordata'] = get_userdata( get_queried_object_id() );
                 }
         }
 

tests/phpunit/tests/general/template.php

@@ -589 +589 @@
                         array( 0, false ),
                 );
         }
+
+        /**
+         * @ticket 44183
+         */
+        function test_get_the_archive_title_is_correct_for_author_queries() {
+                $user_with_posts = $this->factory()->user->create_and_get(
+                        array(
+                                'role' => 'author',
+                        )
+                );
+                $user_with_no_posts = $this->factory()->user->create_and_get(
+                        array(
+                                'role' => 'author',
+                        )
+                );
+
+                $this->factory()->post->create( [
+                        'post_author' => $user_with_posts->ID,
+                ] );
+
+                // Simplify the assertion by removing the default archive title prefix:
+                add_filter( 'get_the_archive_title_prefix', '__return_empty_string' );
+
+                $this->go_to( get_author_posts_url( $user_with_posts->ID ) );
+                $title_when_posts = get_the_archive_title();
+
+                $this->go_to( get_author_posts_url( $user_with_no_posts->ID ) );
+                $title_when_no_posts = get_the_archive_title();
+
+                // Ensure the title is correct both when the user has posts and when they dont:
+                $this->assertSame( $user_with_posts->display_name, $title_when_posts );
+                $this->assertSame( $user_with_no_posts->display_name, $title_when_no_posts );
+        }
 }