Issue #3338518: send credentials in ajax if configured in CORS settings.

Closes #3338518

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

@@ -86,7 +86,7 @@ public function getMinimalRepresentativeSubset(array $libraries) {
     foreach ($libraries as $library) {
       $with_deps = $this->getLibrariesWithDependencies([$library]);
       // We don't need library itself listed in the dependencies.
-      $all_dependencies += array_diff($with_deps, [$library]);
+      $all_dependencies = array_unique(array_merge($all_dependencies, array_diff($with_deps, [$library])));
     }
 
     return array_values(array_diff($libraries, array_intersect($all_dependencies, $libraries)));