diff -u b/includes/bootstrap.inc b/includes/bootstrap.inc
--- b/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -1013,7 +1013,7 @@
 function _drupal_get_filename_fallback_create_error($type, $name, $error_type) {
   // Make sure we only show any missing/moved file error only once per request.
   static $errors_created = array();
-  if (empty($errors_shown[$type][$name][$error_type])) {
+  if (empty($errors_created[$type][$name][$error_type])) {
     if ($error_type == 'missing') {
       trigger_error(format_string('The following %type is missing from the file system: %name. In order to fix this, put the file back in its original location or uninstall the module. For more information, see <a href="@documentation">the documentation page</a>.', array('%type' => $type, '%name' => $name, '@documentation' => 'https://www.drupal.org/node/2487215')), E_USER_WARNING);
     }