diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 1cd178c..50d8571 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -235,9 +235,14 @@ function config_get_config_directory($type = CONFIG_ACTIVE_DIRECTORY) {
  *   The filename of the requested item or NULL if the item is not found.
  */
 function drupal_get_filename($type, $name, $filename = NULL) {
+  // Return NULL right away if $type or $name is empty.
+  if (empty($type) || empty($name)) {
+    return NULL;
+  }
+
   // The location of files will not change during the request, so do not use
   // drupal_static().
-  static $files = array();
+  static $files = array(), $bad = array();
 
   // Type 'core' only exists to simplify application-level logic; it always maps
   // to the /core directory, whereas $name is ignored. It is only requested via
@@ -261,22 +266,36 @@ function drupal_get_filename($type, $name, $filename = NULL) {
     $files[$type][$name] = $filename;
   }
   elseif (!isset($files[$type][$name])) {
+    if (empty($bad)) {
+      $cache = NULL;
+      $cache_object = \Drupal::cache('bootstrap');
+      if (!empty($cache_object) && is_object($cache_object) && method_exists($cache_object, 'get')) {
+        $cache = $cache_object->get('drupal_get_filename:bad', TRUE);
+      }
+      if ($cache && $cache->data) {
+        $bad = $cache->data;
+      }
+      else {
+        $bad = array();
+      }
+    }
+
     // If the pathname of the requested extension is not known, try to retrieve
     // the list of extension pathnames from various providers, checking faster
     // providers first.
     // Retrieve the current module list (derived from the service container).
-    if ($type == 'module' && \Drupal::hasService('module_handler')) {
+    if (!isset($bad[$type][$name]) && $type == 'module' && \Drupal::hasService('module_handler')) {
       foreach (\Drupal::moduleHandler()->getModuleList() as $module_name => $module) {
         $files[$type][$module_name] = $module->getPathname();
       }
     }
     // If still unknown, retrieve the file list prepared in state by
     // system_rebuild_module_data() and system_rebuild_theme_data().
-    if (!isset($files[$type][$name]) && \Drupal::hasService('state')) {
+    if (!isset($bad[$type][$name]) && !isset($files[$type][$name]) && \Drupal::hasService('state')) {
       $files[$type] += \Drupal::state()->get('system.' . $type . '.files', array());
     }
     // If still unknown, perform a filesystem scan.
-    if (!isset($files[$type][$name])) {
+    if (!isset($bad[$type][$name]) && !isset($files[$type][$name])) {
       $listing = new ExtensionDiscovery(DRUPAL_ROOT);
       // Prevent an infinite recursion by this legacy function.
       if ($original_type == 'profile') {
@@ -291,6 +310,18 @@ function drupal_get_filename($type, $name, $filename = NULL) {
   if (isset($files[$type][$name])) {
     return $files[$type][$name];
   }
+  elseif (!isset($bad[$type][$name])) {
+    // Add the missing file to a temporary cache and throw an alert.
+    $bad[$type][$name] = TRUE;
+    $cache_object = \Drupal::cache('bootstrap');
+    if (!empty($cache_object) && is_object($cache_object) && method_exists($cache_object, 'set')) {
+      $cache_object->set('drupal_get_filename:bad', $bad, REQUEST_TIME);
+    }
+    $logger_object = \Drupal::logger('system');
+    if (!empty($logger_object) && is_object($logger_object) && method_exists($logger_object, 'error')) {
+      $logger_object->error('The following @type is missing from the file system: @name', array('@type' => $type, '@name' => $name));
+    }
+  }
 }
 
 /**
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 141686f..3bbce9f 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -259,7 +259,7 @@ public static function database() {
    * @ingroup cache
    */
   public static function cache($bin = 'default') {
-    return static::$container->get('cache.' . $bin);
+    return static::$container ? static::$container->get('cache.' . $bin) : NULL;
   }
 
   /**
@@ -596,7 +596,7 @@ public static function isConfigSyncing() {
    *   The logger for this channel.
    */
   public static function logger($channel) {
-    return static::$container->get('logger.factory')->get($channel);
+    return static::$container ? static::$container->get('logger.factory')->get($channel) : NULL;
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
index cb2833e..cbe3ae8 100644
--- a/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
+++ b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
@@ -99,7 +99,11 @@ 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()));
+      $profile_folders = array();
+      $profile = drupal_get_profile();
+      if (!empty($profile)) {
+        $profile_folders = $this->getComponentNames('profile', array($profile));
+      }
       $folders_to_replace = array_intersect_key($profile_folders, $this->folders);
       if (!empty($folders_to_replace)) {
         $this->folders = array_merge($this->folders, $folders_to_replace);