Merge branch '6.4' into 7.0

* 6.4: (24 commits)
  Fix Twig tests
  [Scheduler] Fix tests
  [TwigBridge] Add FormLayoutTestCase class
  Fix CS
  Allow sending scheduled messages through the slack API
  [TwigBridge] Add `AppVariable::getEnabledLocales()` to retrieve the enabled locales
  [RateLimiter] Add missing dependency
  [RateLimiter] Add SlidingWindowLimiter::reserve()
  [Messenger] Add WrappedExceptionsInterface for nested exceptions
  [Mime] Add `TemplatedEmail::locale()` to set the locale for the email rendering
  Fix CS
  [Messenger][Scheduler] Add AsCronTask & AsPeriodicTask attributes
  [Scheduler] Make debug:scheduler output more useful
  [Notifier] Tweak some phpdocs
  [FrameworkBundle] Change BrowserKitAssertionsTrait::getClient() to be protected
  Fix CS
  [FrameworkBundle] Allow BrowserKit relative URL redirect assert
  [Messenger] RejectRedeliveredMessageException should not be retried
  [Serializer] Make `ProblemNormalizer` give details about Messenger’s `ValidationFailedException`
  [WebProfilerBundle] Support `!` negation operator in url filter
  ...

Author: fabpot

Messenger/DoctrineTransactionMiddleware.php

@@ -39,7 +39,7 @@ protected function handleForManager(EntityManagerInterface $entityManager, Envel
             if ($exception instanceof HandlerFailedException) {
                 // Remove all HandledStamp from the envelope so the retry will execute all handlers again.
                 // When a handler fails, the queries of allegedly successful previous handlers just got rolled back.
-                throw new HandlerFailedException($exception->getEnvelope()->withoutAll(HandledStamp::class), $exception->getNestedExceptions());
+                throw new HandlerFailedException($exception->getEnvelope()->withoutAll(HandledStamp::class), $exception->getWrappedExceptions());
             }
 
             throw $exception;