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Attempt #
Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382. (500 Internal Server Error)

Symfony Exception

Symfony Docs

ValueError RuntimeException

HTTP 500 Internal Server Error

Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382.

Exceptions 2

RuntimeException

in /var/www/canadian/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php (line 116)
  1.         if (\PHP_SESSION_ACTIVE === session_status()) {
  2.             throw new \RuntimeException('Failed to start the session: already started by PHP.');
  3.         }
  5.         if (filter_var(\ini_get('session.use_cookies'), \FILTER_VALIDATE_BOOL) && headers_sent($file, $line)) {
  6.             throw new \RuntimeException(\sprintf('Failed to start the session because headers have already been sent by "%s" at line %d.', $file, $line));
  7.         }
  9.         $sessionId = $_COOKIE[session_name()] ?? null;
  10.         /*
  11.          * Explanation of the session ID regular expression: `/^[a-zA-Z0-9,-]{22,250}$/`.
in /var/www/canadian/vendor/symfony/http-foundation/Session/Session.php -> start (line 59)
  1.         $this->registerBag($flashes);
  2.     }
  4.     public function start(): bool
  5.     {
  6.         return $this->storage->start();
  7.     }
  9.     public function has(string $name): bool
  10.     {
  11.         return $this->getAttributeBag()->has($name);
Session->start() in /var/www/canadian/src/EventListener/RequestListener.php (line 239)
  2.     public function onKernelRequest(RequestEvent $event): bool
  3.     {
  4.         //Inizializzo la sessione
  5.         if (!$this->currentRequest->getSession()->isStarted()) {
  6.             $this->currentRequest->getSession()->start();
  7.             $this->currentRequest->getSession()->set('nrProductsInCart', 0);
  8.         }
  10.         if (!$this->currentRequest->getSession()->has('nrListini')) {
  11.             $this->currentRequest->getSession()->set('nrListini', $this->nrListini);
in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelRequest (line 115)
  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.                 $e->stop();
  10.             }
  11.         }
in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)
  2.         foreach ($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 /var/www/canadian/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 /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)
  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 /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 159)
  1.      */
  2.     private function handleRaw(Request $request, int $type = self::MAIN_REQUEST): Response
  3.     {
  4.         // request
  5.         $event = new RequestEvent($this, $request, $type);
  6.         $this->dispatcher->dispatch($event, KernelEvents::REQUEST);
  8.         if ($event->hasResponse()) {
  9.             return $this->filterResponse($event->getResponse(), $request, $type);
  10.         }
in /var/www/canadian/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 /var/www/canadian/vendor/symfony/http-kernel/EventListener/ErrorListener.php -> handle (line 99)
  1.         }
  3.         $request = $this->duplicateRequest($throwable, $event->getRequest());
  5.         try {
  6.             $response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, false);
  7.         } catch (\Exception $e) {
  8.             $f = FlattenException::createFromThrowable($e);
  10.             $this->logException($e, \sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', $f->getClass(), $f->getMessage(), basename($e->getFile()), $e->getLine()));
in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelException (line 115)
  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.                 $e->stop();
  10.             }
  11.         }
in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)
  2.         foreach ($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 /var/www/canadian/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 /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)
  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 /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 241)
  1.      * Handles a throwable by trying to convert it to a Response.
  2.      */
  3.     private function handleThrowable(\Throwable $e, Request $request, int $type): Response
  4.     {
  5.         $event = new ExceptionEvent($this, $request, $type, $e, isKernelTerminating: $this->terminating);
  6.         $this->dispatcher->dispatch($event, KernelEvents::EXCEPTION);
  8.         // a listener might have replaced the exception
  9.         $e = $event->getThrowable();
  11.         if (!$event->hasResponse()) {
in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> handleThrowable (line 134)
  1.         if ($pop = $request !== $this->requestStack->getMainRequest()) {
  2.             $this->requestStack->push($request);
  3.         }
  5.         try {
  6.             $response = $this->handleThrowable($exception, $request, self::MAIN_REQUEST);
  7.         } finally {
  8.             if ($pop) {
  9.                 $this->requestStack->pop();
  10.             }
  11.         }
in /var/www/canadian/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php -> terminateWithException (line 84)
  1.                         if ($hasRun) {
  2.                             throw $e;
  3.                         }
  5.                         $hasRun = true;
  6.                         $kernel->terminateWithException($e, $request);
  7.                     };
  8.                 }
  9.             } elseif ($event instanceof ConsoleEvent && $app = $event->getCommand()->getApplication()) {
  10.                 $output = $event->getOutput();
  11.                 if ($output instanceof ConsoleOutputInterface) {
in /var/www/canadian/vendor/symfony/error-handler/ErrorHandler.php :: Symfony\Component\HttpKernel\EventListener\{closure} (line 538)
  1.             $this->exceptionHandler = null;
  2.         }
  4.         try {
  5.             if (null !== $exceptionHandler) {
  6.                 $exceptionHandler($exception);
  8.                 return;
  9.             }
  10.             $handlerException ??= $exception;
  11.         } catch (\Throwable $handlerException) {
ErrorHandler->handleException()

ValueError

unlink(): Argument #1 ($filename) must not contain any null bytes

in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php (line 341)
  2.             if ($csvTime >= $minimalProfileTimestamp) {
  3.                 break;
  4.             }
  6.             @unlink($this->getFilename($csvToken));
  7.             $offset += \strlen($line);
  8.         }
  9.         fclose($handle);
  11.         file_put_contents($file.'.offset', $offset);
in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php unlink (line 341)
  2.             if ($csvTime >= $minimalProfileTimestamp) {
  3.                 break;
  4.             }
  6.             @unlink($this->getFilename($csvToken));
  7.             $offset += \strlen($line);
  8.         }
  9.         fclose($handle);
  11.         file_put_contents($file.'.offset', $offset);
in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php -> removeExpiredProfiles (line 193)
  1.                 $profile->getVirtualType() ?? 'request',
  2.             ], ',', '"', '\\');
  3.             fclose($file);
  5.             if (1 === mt_rand(1, 10)) {
  6.                 $this->removeExpiredProfiles();
  7.             }
  8.         }
  10.         return true;
  11.     }
in /var/www/canadian/vendor/symfony/http-kernel/Profiler/Profiler.php -> write (line 97)
  1.             if ($collector instanceof LateDataCollectorInterface) {
  2.                 $collector->lateCollect();
  3.             }
  4.         }
  6.         if (!($ret = $this->storage->write($profile)) && null !== $this->logger) {
  7.             $this->logger->warning('Unable to store the profiler information.', ['configured_storage' => $this->storage::class]);
  8.         }
  10.         return $ret;
  11.     }
in /var/www/canadian/vendor/symfony/http-kernel/EventListener/ProfilerListener.php -> saveProfile (line 129)
  1.             }
  2.         }
  4.         // save profiles
  5.         foreach ($this->profiles as $request) {
  6.             $this->profiler->saveProfile($this->profiles[$request]);
  7.         }
  9.         $this->profiles = new \SplObjectStorage();
  10.         $this->parents = new \SplObjectStorage();
  11.     }
in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelTerminate (line 115)
  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.                 $e->stop();
  10.             }
  11.         }
in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)
  2.         foreach ($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 /var/www/canadian/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 /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)
  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 /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 114)
  2.     public function terminate(Request $request, Response $response): void
  3.     {
  4.         try {
  5.             $this->terminating = true;
  6.             $this->dispatcher->dispatch(new TerminateEvent($this, $request, $response), KernelEvents::TERMINATE);
  7.         } finally {
  8.             $this->terminating = false;
  9.         }
  10.     }
in /var/www/canadian/vendor/symfony/http-kernel/Kernel.php -> terminate (line 145)
  1.         if (false === $this->booted) {
  2.             return;
  3.         }
  5.         if ($this->getHttpKernel() instanceof TerminableInterface) {
  6.             $this->getHttpKernel()->terminate($request, $response);
  7.         }
  8.     }
  10.     public function shutdown(): void
  11.     {
in /var/www/canadian/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php -> terminate (line 53)
  1.         } else {
  2.             $response->send();
  3.         }
  5.         if ($this->kernel instanceof TerminableInterface) {
  6.             $this->kernel->terminate($this->request, $response);
  7.         }
  9.         return 0;
  10.     }
  11. }
in /var/www/canadian/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/canadian/vendor/autoload_runtime.php') in /var/www/canadian/public/index.php (line 5)
  1. <?php
  3. use App\Kernel;
  5. require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
  7. return function (array $context) {
  8.     return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
  9. };

Stack Traces 2

[2/2] RuntimeException 
RuntimeException:
Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382.

  at /var/www/canadian/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:116
  at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
     (/var/www/canadian/vendor/symfony/http-foundation/Session/Session.php:59)
  at Symfony\Component\HttpFoundation\Session\Session->start()
     (/var/www/canadian/src/EventListener/RequestListener.php:239)
  at App\EventListener\RequestListener->onKernelRequest()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:159)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ErrorListener.php:99)
  at Symfony\Component\HttpKernel\EventListener\ErrorListener->onKernelException()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:241)
  at Symfony\Component\HttpKernel\HttpKernel->handleThrowable()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:134)
  at Symfony\Component\HttpKernel\HttpKernel->terminateWithException()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php:84)
  at Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}()
     (/var/www/canadian/vendor/symfony/error-handler/ErrorHandler.php:538)
  at Symfony\Component\ErrorHandler\ErrorHandler->handleException()
[1/2] ValueError 
ValueError:
unlink(): Argument #1 ($filename) must not contain any null bytes

  at /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341
  at unlink()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341)
  at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->removeExpiredProfiles()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:193)
  at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->write()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/Profiler.php:97)
  at Symfony\Component\HttpKernel\Profiler\Profiler->saveProfile()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ProfilerListener.php:129)
  at Symfony\Component\HttpKernel\EventListener\ProfilerListener->onKernelTerminate()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:114)
  at Symfony\Component\HttpKernel\HttpKernel->terminate()
     (/var/www/canadian/vendor/symfony/http-kernel/Kernel.php:145)
  at Symfony\Component\HttpKernel\Kernel->terminate()
     (/var/www/canadian/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:53)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (/var/www/canadian/vendor/autoload_runtime.php:29)
  at require_once('/var/www/canadian/vendor/autoload_runtime.php')
     (/var/www/canadian/public/index.php:5)