diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index d48ae83..37c210f 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -963,7 +963,7 @@ function install_base_system(&$install_state) {
 
   // Enable the user module so that sessions can be recorded during the
   // upcoming bootstrap step.
-  \Drupal::moduleHandler()->install(array('user'), FALSE);
+  \Drupal::moduleHandler()->install(array('user'));
 
   // Save the list of other modules to install for the upcoming tasks.
   // State can be set to the database now that system.module is installed.
diff --git a/core/lib/Drupal/Core/Extension/ModuleHandler.php b/core/lib/Drupal/Core/Extension/ModuleHandler.php
index 08a3ec5..0e2180f 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandler.php
@@ -651,21 +651,18 @@ public function install(array $module_list, $enable_dependencies = TRUE) {
         return TRUE;
       }
 
-      // Conditionally add the dependencies to the list of modules.
-      if ($enable_dependencies) {
-        // Add dependencies to the list. The new modules will be processed as
-        // the while loop continues.
-        while (list($module) = each($module_list)) {
-          foreach (array_keys($module_data[$module]->requires) as $dependency) {
-            if (!isset($module_data[$dependency])) {
-              // The dependency does not exist.
-              return FALSE;
-            }
+      // Add dependencies to the list. The new modules will be processed as
+      // the while loop continues.
+      while (list($module) = each($module_list)) {
+        foreach (array_keys($module_data[$module]->requires) as $dependency) {
+          if (!isset($module_data[$dependency])) {
+            // The dependency does not exist.
+            return FALSE;
+          }
 
-            // Skip already installed modules.
-            if (!isset($module_list[$dependency]) && !isset($installed_modules[$dependency])) {
-              $module_list[$dependency] = $dependency;
-            }
+          // Skip already installed modules.
+          if (!isset($module_list[$dependency]) && !isset($installed_modules[$dependency])) {
+            $module_list[$dependency] = $dependency;
           }
         }
       }
diff --git a/core/modules/user/lib/Drupal/user/UserStorage.php b/core/modules/user/lib/Drupal/user/UserStorage.php
index afd53b3..bad10da 100644
--- a/core/modules/user/lib/Drupal/user/UserStorage.php
+++ b/core/modules/user/lib/Drupal/user/UserStorage.php
@@ -99,7 +99,9 @@ function mapFromStorageRecords(array $records) {
    * {@inheritdoc}
    */
   public function save(EntityInterface $entity) {
-    if (!$entity->id()) {
+    // The anonymous user account is saved with the fixed user ID of 0.
+    // Therefore we need to check for NULL explicitly.
+    if ($entity->id() === NULL) {
       $entity->uid->value = $this->database->nextId($this->database->query('SELECT MAX(uid) FROM {users}')->fetchField());
       $entity->enforceIsNew();
     }
diff --git a/core/modules/user/user.info.yml b/core/modules/user/user.info.yml
index 45a421a..0c7b4cf 100644
--- a/core/modules/user/user.info.yml
+++ b/core/modules/user/user.info.yml
@@ -6,3 +6,5 @@ version: VERSION
 core: 8.x
 required: true
 configure: user.admin_index
+dependencies:
+ - field
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index 1cb3dbd..558cade 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -222,15 +222,17 @@ function user_schema() {
 function user_install() {
   $storage = \Drupal::entityManager()->getStorage('user');
   // Insert a row for the anonymous user.
-  $anonymous_user = $storage->create(array('uid' => 0));
-  $anonymous_user->save();
+  $storage
+    ->create(array('uid' => 0))
+    ->save();
 
   // We need some placeholders here as name and mail are uniques.
   // This will be changed by the settings form in the installer.
-  $site_maintenance_user = $storage->create(array(
-    'uid' => 1,
-    'name' => 'placeholder-for-uid-1',
-    'mail' => 'placeholder-for-uid-1',
-  ));
-  $site_maintenance_user->save();
+  $storage
+    ->create(array(
+      'uid' => 1,
+      'name' => 'placeholder-for-uid-1',
+      'mail' => 'placeholder-for-uid-1',
+    ))
+    ->save();
 }