Merge branch '3.3' into 3.4

* 3.3: (33 commits)
  Preserve HttpOnly value when deserializing a header
  [DX] [TwigBundle] Enhance the new exception page design
  Fix deprecated message
  [DI][Security] Prevent unwanted deprecation notices when using Expression Languages
  bumped Symfony version to 3.3.5
  updated VERSION for 3.3.4
  updated CHANGELOG for 3.3.4
  [VarDumper] Reduce size of serialized Data objects
  bumped Symfony version to 3.2.12
  updated VERSION for 3.2.11
  updated CHANGELOG for 3.2.11
  fixed bad merge
  Fix indent of methods
  [Cache] Handle APCu failures gracefully
  [DoctrineBridge] Use normalizedIds for resetting entity manager services
  [FrameworkBundle] Do not remove files from assets dir
  [FrameworkBundle] 3.3: Don't get() private services from debug:router
  bumped Symfony version to 3.3.4
  updated VERSION for 3.3.3
  updated CHANGELOG for 3.3.3
  ...

Author: nicolas-grekas

Normalizer/AbstractNormalizer.php

@@ -192,7 +192,7 @@ protected function handleCircularReference($object)
             return call_user_func($this->circularReferenceHandler, $object);
         }
 
-        throw new CircularReferenceException(sprintf('A circular reference has been detected (configured limit: %d).', $this->circularReferenceLimit));
+        throw new CircularReferenceException(sprintf('A circular reference has been detected when serializing the object of class "%s" (configured limit: %d)', get_class($object), $this->circularReferenceLimit));
     }
 
     /**