diff --git a/core/lib/Drupal/Component/Utility/OpCodeCache.php b/core/lib/Drupal/Component/Utility/OpCodeCache.php
index 90b28e7..4800fc3 100644
--- a/core/lib/Drupal/Component/Utility/OpCodeCache.php
+++ b/core/lib/Drupal/Component/Utility/OpCodeCache.php
@@ -24,6 +24,7 @@ class OpCodeCache {
    *   The absolute pathname of the PHP file to invalidate.
    */
   public static function invalidate($pathname) {
+    debug($pathname);
     clearstatcache(TRUE, $pathname);
 
     // Check if the Zend OPcache is enabled and if so invalidate the file.