Issue #2348219 by Fabianx, dawehner, webchick, Berdir, damiankloip,...

Issue #2348219 by Fabianx, dawehner, webchick, Berdir, damiankloip, joelpittet, gnuget: You have requested a non-existent service "cache.backend.null"

core/lib/Drupal/Core/DrupalKernel.php

@@ -760,7 +760,7 @@ public function updateModules(array $module_list, array $module_filenames = arra
    *   The cache key used for the service container.
    */
   protected function getContainerCacheKey() {
-    $parts = array('service_container', $this->environment, \Drupal::VERSION, Settings::get('deployment_identifier'));
+    $parts = array('service_container', $this->environment, \Drupal::VERSION, Settings::get('deployment_identifier'), serialize(Settings::get('container_yamls')));
     return implode(':', $parts);
   }