diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 7b2abb2..d0d8779 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -472,8 +472,8 @@ public function escapeFilter(\Twig_Environment $env, $arg, $strategy = 'html', $
         throw new \Exception('Object of type ' . get_class($arg) . ' cannot be printed.');
       }
     }
-    elseif (is_array($arg)) {
-      throw new \Exception('Render arrays cannot be printed.');
+    else {
+      throw new \Exception('Variable of type ' . gettype($arg) . ' cannot be printed.');
     }
 
     // We have a string or an object converted to a string: Autoescape it!
@@ -587,9 +587,7 @@ public function renderVar($arg) {
         throw new \Exception('Object of type ' . get_class($arg) . ' cannot be printed.');
       }
     }
-    elseif (is_array($arg)) {
-      throw new \Exception('Render arrays cannot be printed.');
-    }
+    throw new \Exception('Variable of type ' . gettype($arg) . ' cannot be printed.');
   }
 
   /**