Change record status: 
Project: 
Introduced in branch: 
11.x
Introduced in version: 
11.x
Description: 

The $app_root parameter is deprecated in several methods of DrupalKernel:

  public static function createFromRequest(Request $request, $class_loader, $environment, $allow_dumping = TRUE, $app_root = NULL) {

  public function __construct($environment, $class_loader, $allow_dumping = TRUE, $app_root = NULL) {

  public static function findSitePath(Request $request, $require_settings = TRUE, $app_root = NULL) {

  public static function bootEnvironment($app_root = NULL) {

All of these should be called without the $app_root parameter.

Additionally, the protected method guessApplicationRoot() has been renamed to getApplicationRoot().

Impacts: 
Module developers