Update to Drupal 8.0.0-rc3. For more information, see https://www.drupal.org/node/2608078

core/lib/Drupal/Core/Asset/AssetResolver.php

@@ -334,6 +334,9 @@ class AssetResolver implements AssetResolverInterface {
       // Allow modules and themes to alter the JavaScript settings.
       $this->moduleHandler->alter('js_settings', $settings, $assets);
       $this->themeManager->alter('js_settings', $settings, $assets);
+      // Update the $assets object accordingly, so that it reflects the final
+      // settings.
+      $assets->setSettings($settings);
       $settings_as_inline_javascript = [
         'type' => 'setting',
         'group' => JS_SETTING,

core/lib/Drupal/Core/Asset/AssetResolverInterface.php

@@ -69,6 +69,8 @@ interface AssetResolverInterface {
    *
    * @param \Drupal\Core\Asset\AttachedAssetsInterface $assets
    *   The assets attached to the current response.
+   *   Note that this object is modified to reflect the final JavaScript
+   *   settings assets.
    * @param bool $optimize
    *   Whether to apply the JavaScript asset collection optimizer, to return
    *   optimized JavaScript asset collections rather than an unoptimized ones.

core/lib/Drupal/Core/Asset/LibraryDiscovery.php

@@ -8,7 +8,6 @@
 namespace Drupal\Core\Asset;
 
 use Drupal\Core\Cache\CacheCollectorInterface;
-use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
 
 /**
  * Discovers available asset libraries in Drupal.
@@ -22,13 +21,6 @@ class LibraryDiscovery implements LibraryDiscoveryInterface {
    */
   protected $collector;
 
-  /**
-   * The cache tag invalidator.
-   *
-   * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface
-   */
-  protected $cacheTagInvalidator;
-
   /**
    * The final library definitions, statically cached.
    *
@@ -44,16 +36,9 @@ class LibraryDiscovery implements LibraryDiscoveryInterface {
    *
    * @param \Drupal\Core\Cache\CacheCollectorInterface $library_discovery_collector
    *   The library discovery cache collector.
-   * @param \Drupal\Core\Cache\CacheTagsInvalidatorInterface $cache_tag_invalidator
-   *   The cache tag invalidator.
-   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
-   *   The module handler.
-   * @param \Drupal\Core\Theme\ThemeManagerInterface $theme_manager
-   *   The theme manager.
    */
-  public function __construct(CacheCollectorInterface $library_discovery_collector, CacheTagsInvalidatorInterface $cache_tag_invalidator) {
+  public function __construct(CacheCollectorInterface $library_discovery_collector) {
     $this->collector = $library_discovery_collector;
-    $this->cacheTagInvalidator = $cache_tag_invalidator;
   }
 
   /**
@@ -64,7 +49,6 @@ class LibraryDiscovery implements LibraryDiscoveryInterface {
       $libraries = $this->collector->get($extension);
       $this->libraryDefinitions[$extension] = [];
       foreach ($libraries as $name => $definition) {
-        $library_name = "$extension/$name";
         $this->libraryDefinitions[$extension][$name] = $definition;
       }
     }
@@ -84,7 +68,6 @@ class LibraryDiscovery implements LibraryDiscoveryInterface {
    * {@inheritdoc}
    */
   public function clearCachedDefinitions() {
-    $this->cacheTagInvalidator->invalidateTags(['library_info']);
     $this->libraryDefinitions = [];
     $this->collector->clear();
   }

core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php

@@ -88,7 +88,6 @@ class LibraryDiscoveryCollector extends CacheCollector {
     return $this->storage[$key];
   }
 
-
   /**
    * Returns the library definitions for a given extension.
    *
@@ -172,4 +171,13 @@ class LibraryDiscoveryCollector extends CacheCollector {
     }
     return $library_definition;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function reset() {
+    parent::reset();
+    $this->cid = NULL;
+  }
+
 }