diff -u b/core/lib/Drupal/Core/Extension/ModuleExtensionList.php b/core/lib/Drupal/Core/Extension/ModuleExtensionList.php
--- b/core/lib/Drupal/Core/Extension/ModuleExtensionList.php
+++ b/core/lib/Drupal/Core/Extension/ModuleExtensionList.php
@@ -106,7 +106,6 @@
    */
   protected function getProfileDirectories(ExtensionDiscovery $discovery) {
     $discovery->setProfileDirectories([]);
-    $all_profiles = $discovery->scan('profile');
     $profiles = $this->profileList->getAncestors($this->installProfile);
 
     $profile_directories = array_map(function (Extension $profile) {
diff -u b/core/lib/Drupal/Core/Extension/ProfileExtensionList.php b/core/lib/Drupal/Core/Extension/ProfileExtensionList.php
--- b/core/lib/Drupal/Core/Extension/ProfileExtensionList.php
+++ b/core/lib/Drupal/Core/Extension/ProfileExtensionList.php
@@ -104,7 +104,7 @@
     }
 
     // Remove any distributions which are extended by another one.
-    foreach ($distributions as $profile_name => $profile) {
+    foreach ($distributions as $profile) {
       if (!empty($profile->info['base profile'])) {
         $base_profile = $profile->info['base profile'];
         unset($distributions[$base_profile]);