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Warning: Cannot modify header information - headers already sent by (output started at /var/www/webaccount/vendor/symfony/var-dumper/Dumper/AbstractDumper.php:178) (500 Internal Server Error)

Symfony Exception

Symfony Docs

ErrorException

HTTP 500 Internal Server Error

Warning: Cannot modify header information - headers already sent by (output started at /var/www/webaccount/vendor/symfony/var-dumper/Dumper/AbstractDumper.php:178)

Exception

ErrorException

Show exception properties 
ErrorException {#571
  #severity: E_WARNING
}
in vendor/symfony/http-foundation/Session/SessionUtils.php (line 52)
  1.         }
  2.         if (null === $sessionCookie) {
  3.             return null;
  4.         }
  6.         header_remove('Set-Cookie');
  7.         foreach ($otherCookies as $h) {
  8.             header($h, false);
  9.         }
  11.         return $sessionCookie;
in vendor/symfony/http-kernel/EventListener/AbstractSessionListener.php :: popSessionCookie (line 161)
  1.             $sessionCookieSecure = $sessionOptions['cookie_secure'] ?? false;
  2.             $sessionCookieHttpOnly = $sessionOptions['cookie_httponly'] ?? true;
  3.             $sessionCookieSameSite = $sessionOptions['cookie_samesite'] ?? Cookie::SAMESITE_LAX;
  4.             $sessionUseCookies = $sessionOptions['use_cookies'] ?? true;
  6.             SessionUtils::popSessionCookie($sessionName, $sessionId);
  8.             if ($sessionUseCookies) {
  9.                 $request = $event->getRequest();
  10.                 $requestSessionCookieId = $request->cookies->get($sessionName);
in vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelResponse (line 116)
  1.         $this->priority ??= $dispatcher->getListenerPriority($eventName, $this->listener);
  3.         $e = $this->stopwatch->start($this->name, 'event_listener');
  5.         try {
  6.             ($this->optimizedListener ?? $this->listener)($event, $eventName, $dispatcher);
  7.         } finally {
  8.             if ($e->isStarted()) {
  9.                 $e->stop();
  10.             }
  11.         }
in vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 220)
  2.         foreach ($listeners as $listener) {
  3.             if ($stoppable && $event->isPropagationStopped()) {
  4.                 break;
  5.             }
  6.             $listener($event, $eventName, $this);
  7.         }
  8.     }
  10.     /**
  11.      * Sorts the internal list of listeners for the given event by priority.
in vendor/symfony/event-dispatcher/EventDispatcher.php -> callListeners (line 56)
  1.         } else {
  2.             $listeners = $this->getListeners($eventName);
  3.         }
  5.         if ($listeners) {
  6.             $this->callListeners($listeners, $eventName, $event);
  7.         }
  9.         return $event;
  10.     }
in vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 139)
  1.         try {
  2.             $this->beforeDispatch($eventName, $event);
  3.             try {
  4.                 $e = $this->stopwatch->start($eventName, 'section');
  5.                 try {
  6.                     $this->dispatcher->dispatch($event, $eventName);
  7.                 } finally {
  8.                     if ($e->isStarted()) {
  9.                         $e->stop();
  10.                     }
  11.                 }
in vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 214)
  1.      */
  2.     private function filterResponse(Response $response, Request $request, int $type): Response
  3.     {
  4.         $event = new ResponseEvent($this, $request, $type, $response);
  6.         $this->dispatcher->dispatch($event, KernelEvents::RESPONSE);
  8.         $this->finishRequest($request, $type);
  10.         return $event->getResponse();
  11.     }
in vendor/symfony/http-kernel/HttpKernel.php -> filterResponse (line 202)
  2.                 throw new ControllerDoesNotReturnResponseException($msg, $controller, __FILE__, __LINE__ - 17);
  3.             }
  4.         }
  6.         return $this->filterResponse($response, $request, $type);
  7.     }
  9.     /**
  10.      * Filters a response object.
  11.      *
in vendor/symfony/http-kernel/HttpKernel.php -> handleRaw (line 76)
  1.         $request->headers->set('X-Php-Ob-Level', (string) ob_get_level());
  3.         $this->requestStack->push($request);
  4.         $response = null;
  5.         try {
  6.             return $response = $this->handleRaw($request, $type);
  7.         } catch (\Throwable $e) {
  8.             if ($e instanceof \Error && !$this->handleAllThrowables) {
  9.                 throw $e;
  10.             }
in vendor/symfony/http-kernel/Kernel.php -> handle (line 197)
  1.         $this->boot();
  2.         ++$this->requestStackSize;
  3.         $this->resetServices = true;
  5.         try {
  6.             return $this->getHttpKernel()->handle($request, $type, $catch);
  7.         } finally {
  8.             --$this->requestStackSize;
  9.         }
  10.     }
in vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php -> handle (line 35)
  1.     ) {
  2.     }
  4.     public function run(): int
  5.     {
  6.         $response = $this->kernel->handle($this->request);
  8.         if (Kernel::VERSION_ID >= 60400) {
  9.             $response->send(false);
  11.             if (\function_exists('fastcgi_finish_request') && !$this->debug) {
in vendor/autoload_runtime.php -> run (line 29)
  1. $app = $app(...$args);
  3. exit(
  4.     $runtime
  5.         ->getRunner($app)
  6.         ->run()
  7. );
require_once('/var/www/webaccount/vendor/autoload_runtime.php') in public/index.php (line 4)
  1. <?php
  2. use App\Kernel;
  4. require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
  6. setlocale(LC_ALL, 'fr_FR.UTF-8');
  7. \Locale::setDefault('fr_FR');

Stack Trace

ErrorException 
ErrorException:
Warning: Cannot modify header information - headers already sent by (output started at /var/www/webaccount/vendor/symfony/var-dumper/Dumper/AbstractDumper.php:178)

  at vendor/symfony/http-foundation/Session/SessionUtils.php:52
  at Symfony\Component\HttpFoundation\Session\SessionUtils::popSessionCookie()
     (vendor/symfony/http-kernel/EventListener/AbstractSessionListener.php:161)
  at Symfony\Component\HttpKernel\EventListener\AbstractSessionListener->onKernelResponse()
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:116)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:220)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:139)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (vendor/symfony/http-kernel/HttpKernel.php:214)
  at Symfony\Component\HttpKernel\HttpKernel->filterResponse()
     (vendor/symfony/http-kernel/HttpKernel.php:202)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (vendor/symfony/http-kernel/HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (vendor/symfony/http-kernel/Kernel.php:197)
  at Symfony\Component\HttpKernel\Kernel->handle()
     (vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:35)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (vendor/autoload_runtime.php:29)
  at require_once('/var/www/webaccount/vendor/autoload_runtime.php')
     (public/index.php:4)