[HttpKernel] made request stack feature BC

src/Symfony/Component/HttpFoundation/RequestStack.php

@@ -42,12 +42,12 @@ class RequestStack
      * This method should generally not be called directly as the stack
      * management should be taken care of by the application itself.
      *
-     * @return Request
+     * @return Request|null
      */
     public function pop()
     {
         if (!$this->requests) {
-            throw new \LogicException('Unable to pop a Request as the stack is already empty.');
+            return null;
         }
 
         return array_pop($this->requests);

src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php

@@ -78,7 +78,7 @@ class LocaleListener implements EventSubscriberInterface
     public function onKernelFinishRequest(FinishRequestEvent $event)
     {
         if (null === $this->requestStack) {
-            throw new \LogicException('You must pass a RequestStack.');
+            return; // removed when requestStack is required
         }
 
         if (null !== $parentRequest = $this->requestStack->getParentRequest()) {

src/Symfony/Component/HttpKernel/EventListener/RouterListener.php

@@ -94,7 +94,7 @@ class RouterListener implements EventSubscriberInterface
     public function onKernelFinishRequest(FinishRequestEvent $event)
     {
         if (null === $this->requestStack) {
-            throw new \LogicException('You must pass a RequestStack.');
+            return; // removed when requestStack is required
         }
 
         $this->setRequest($this->requestStack->getParentRequest());

src/Symfony/Component/Security/composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.3.3",
         "symfony/event-dispatcher": "~2.1",
-        "symfony/http-foundation": "~2.4",
+        "symfony/http-foundation": "~2.1",
         "symfony/http-kernel": "~2.4"
     },
     "require-dev": {