diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 99e807a..73b81c2 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -369,6 +369,9 @@ public function attachLibrary($library) {
    *
    * @return string|null
    *   The escaped, rendered output, or NULL if there is no valid output.
+   *
+   * @throws \Exception
+   *   When the object cannot be printed.
    */
   public function escapeFilter(\Twig_Environment $env, $arg, $strategy = 'html', $charset = NULL, $autoescape = FALSE) {
     // Check for a numeric zero int or float.
@@ -447,6 +450,9 @@ public function escapeFilter(\Twig_Environment $env, $arg, $strategy = 'html', $
    * @return mixed
    *   The rendered output or an Twig_Markup object.
    *
+   * @throws \Exception
+   *   When the object cannot be printed.
+   *
    * @see render
    * @see TwigNodeVisitor
    */