diff -u b/core/lib/Drupal/Core/Extension/ModuleHandler.php b/core/lib/Drupal/Core/Extension/ModuleHandler.php
--- b/core/lib/Drupal/Core/Extension/ModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandler.php
@@ -710,8 +710,8 @@
    * {@inheritdoc}
    */
   public function getName($module) {
-    $module_data = system_rebuild_module_data();
-    return isset($module_data[$module]->info['name']) ? $module_data[$module]->info['name'] : $module;
+    $info = system_get_info('module', $module);
+    return isset($info['name']) ? $info['name'] : $module;
   }
 
 }
diff -u b/core/modules/help/src/Controller/HelpController.php b/core/modules/help/src/Controller/HelpController.php
--- b/core/modules/help/src/Controller/HelpController.php
+++ b/core/modules/help/src/Controller/HelpController.php
@@ -66,12 +66,10 @@
    *   A string containing the formatted list.
    */
   protected function helpLinksAsList() {
-    $module_info = system_rebuild_module_data();
-
     $modules = array();
     foreach ($this->moduleHandler()->getImplementations('help') as $module) {
       if ($this->moduleHandler()->invoke($module, 'help', array("help.page.$module", $this->routeMatch))) {
-        $modules[$module] = $module_info[$module]->info['name'];
+        $modules[$module] = $this->moduleHandler->getName($module);
       }
     }
     asort($modules);
@@ -118,11 +116,12 @@
   public function helpPage($name) {
     $build = array();
     if ($this->moduleHandler()->implementsHook($name, 'help')) {
-      $build['#title'] = SafeMarkup::checkPlain($info[$name]['name']);
+      $module_name =  $this->moduleHandler()->getName($name);
+      $build['#title'] = SafeMarkup::checkPlain($module_name);
 
       $temp = $this->moduleHandler()->invoke($name, 'help', array("help.page.$name", $this->routeMatch));
       if (empty($temp)) {
-        $build['top']['#markup'] = $this->t('No help is available for module %module.', array('%module' => $this->moduleHandler()->getName($name)));
+        $build['top']['#markup'] = $this->t('No help is available for module %module.', array('%module' => $module_name));
       }
       else {
         $build['top']['#markup'] = $temp;
@@ -130,7 +129,7 @@
 
       // Only print list of administration pages if the module in question has
       // any such pages associated to it.
-      $admin_tasks = system_get_module_admin_tasks($name, $info[$name]);
+      $admin_tasks = system_get_module_admin_tasks($name, system_get_info('module', $name));
       if (!empty($admin_tasks)) {
         $links = array();
         foreach ($admin_tasks as $task) {
@@ -141,7 +140,7 @@
         $build['links']['#links'] = array(
           '#heading' => array(
             'level' => 'h3',
-            'text' => $this->t('@module administration pages', array('@module' => $info[$name]['name'])),
+            'text' => $this->t('@module administration pages', array('@module' => $module_name)),
           ),
           '#links' => $links,
         );