Ticket #43847: 43847.diff

src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php

@@ -1149 +1149 @@
                 $featured_media = (int) $featured_media;
                 if ( $featured_media ) {
                         $result = set_post_thumbnail( $post_id, $featured_media );
+
                         if ( $result ) {
                                 return true;
-                        } else {
-                                return new WP_Error( 'rest_invalid_featured_media', __( 'Invalid featured media ID.' ), array( 'status' => 400 ) );
                         }
-                } else {
-                        return delete_post_thumbnail( $post_id );
+
+                        return new WP_Error(
+                                'rest_invalid_featured_media',
+                                __( 'Invalid featured media ID.' ),
+                                array(
+                                        'status' => 400,
+                                )
+                        );
                 }
 
+                return delete_post_thumbnail( $post_id );
         }
 
         /**