Merge branch '4.4' into 5.0

* 4.4:
  Avoid stale-if-error if kernel.debug = true, because it hides errors
  [Console] Fix SymfonyQuestionHelper tests sometimes failing on AppVeyor
  [SecurityBundle] Fix collecting traceable listeners info using anonymous: lazy
  [Filesystem][FilesystemCommonTrait] Use a dedicated directory when there are no namespace
  [Workflow] Fix configuration node reference for "initial_marking"
  expand listener in place
  [DI] deferred exceptions in ResolveParameterPlaceHoldersPass
  Do not throw exception on valut generate key

EventDispatcher.php

@@ -240,7 +240,7 @@ private function sortListeners(string $eventName)
         $this->sorted[$eventName] = [];
 
         foreach ($this->listeners[$eventName] as &$listeners) {
-            foreach ($listeners as $k => $listener) {
+            foreach ($listeners as $k => &$listener) {
                 if (\is_array($listener) && isset($listener[0]) && $listener[0] instanceof \Closure && 2 >= \count($listener)) {
                     $listener[0] = $listener[0]();
                     $listener[1] = $listener[1] ?? '__invoke';