commit 73179731919ebdc79ed0847cfd9365b2f90a5c1e
Author: Joel Pittet <joel@pittet.ca>
Date:   Sun Oct 6 12:14:46 2013 -0700

    fixed for 2053489

diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 2c63a3c..2e33a39 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -1266,7 +1266,7 @@ function comment_load($cid, $reset = FALSE) {
  *   The number of new comments or FALSE if the user is not logged in.
  */
 function comment_num_new($entity_id, $entity_type, $field_name = NULL, $timestamp = 0) {
-  $user = Drupal::currentUser();
+  $user = \Drupal::currentUser();
 
   if ($user->isAuthenticated() && \Drupal::moduleHandler()->moduleExists('history')) {
     // Retrieve the timestamp at which the current user last viewed this entity.
@@ -1379,7 +1379,7 @@ function comment_get_display_page($cid, $instance) {
  * @param \Drupal\comment\CommentInterface $comment
  */
 function comment_preview(CommentInterface $comment) {
-  $user = Drupal::currentUser();
+  $user = \Drupal::currentUser();
   $preview_build = array();
   $entity = entity_load($comment->entity_type->value, $comment->entity_id->value);
 
@@ -1617,7 +1617,7 @@ function template_preprocess_comment(&$variables) {
 function theme_comment_post_forbidden($variables) {
   $entity = $variables['commented_entity'];
   $field_name = $variables['field_name'];
-  $user = Drupal::currentUser();
+  $user = \Drupal::currentUser();
 
   // Since this is expensive to compute, we cache it so that a page with many
   // comments only has to query the database once for all the links.