only in patch2:
unchanged:
--- a/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
+++ b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
@@ -98,11 +98,14 @@ protected function getAllFolders() {
         // The install profile can override module default configuration. We do
         // this by replacing the config file path from the module/theme with the
         // install profile version if there are any duplicates.
-        $profile_folders = $this->getComponentNames('profile', array(drupal_get_profile()));
-        $this->folders = $profile_folders + $this->folders;
+        $profile = drupal_get_profile();
+        if (isset($profile)) {
+          $profile_folders = $this->getComponentNames('profile', array($profile));
+          $this->folders = $profile_folders + $this->folders;
+        }
       }
     }
-    return $this->folders;
+    return $this->folders;§
   }
 }