Deprecated: ini_set(): assert.warning INI setting is deprecated in /app/vendor/symfony/runtime/Internal/BasicErrorHandler.php on line 35
Failed to start the session because headers have already been sent by "/app/vendor/symfony/runtime/Internal/BasicErrorHandler.php" at line 35. (500 Internal Server Error)

Symfony Exception

Symfony Docs

RuntimeException

HTTP 500 Internal Server Error

Failed to start the session because headers have already been sent by "/app/vendor/symfony/runtime/Internal/BasicErrorHandler.php" at line 35.

Exception

RuntimeException

in vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php (line 145)
    in vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php -> start (line 352)
      in vendor/symfony/http-foundation/Session/Session.php -> getBag (line 261)
        in vendor/symfony/http-foundation/Session/Session.php -> getBag (line 283)
          in vendor/symfony/http-foundation/Session/Session.php -> getAttributeBag (line 85)
            in vendor/symfony/security-http/Util/TargetPathTrait.php -> set (line 28)
              in vendor/symfony/security-http/Firewall/ExceptionListener.php -> saveTargetPath (line 238)
                in vendor/symfony/security-http/Firewall/ExceptionListener.php -> setTargetPath (line 207)
                  in vendor/symfony/security-http/Firewall/ExceptionListener.php -> startAuthentication (line 152)
                    in vendor/symfony/security-http/Firewall/ExceptionListener.php -> handleAccessDeniedException (line 103)
                      in vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelException (line 117)
                        in vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 230)
                          in vendor/symfony/event-dispatcher/EventDispatcher.php -> callListeners (line 59)
                            in vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 154)
                              in vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 223)
                                in vendor/symfony/http-kernel/HttpKernel.php -> handleThrowable (line 86)
                                  in vendor/symfony/http-kernel/Kernel.php -> handle (line 202)
                                    in vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php -> handle (line 35)
                                      in vendor/autoload_runtime.php -> run (line 35)
                                        require_once('/app/vendor/autoload_runtime.php') in public/index.php (line 5) 
                                        1. <?php

use App\Kernel;

require_once dirname(__DIR__).'/vendor/autoload_runtime.php';

return function (array $context) {
    return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
};

                                        Logs 1

                                        Level Channel Message
                                        INFO 20:54:14 request Matched route "_profiler". 
                                        {
    "route": "_profiler",
    "route_parameters": {
        "_route": "_profiler",
        "_controller": "web_profiler.controller.profiler::panelAction",
        "token": "4f7c9c"
    },
    "request_uri": "http://backend.grading-world.jkweb.dev/_profiler/4f7c9c?panel=request",
    "method": "GET"
}
                                        DEBUG 20:54:14 security Checking for authenticator support. 
                                        {
    "firewall_name": "dev",
    "authenticators": 1
}
                                        DEBUG 20:54:14 security Checking support on authenticator. 
                                        {
    "firewall_name": "dev",
    "authenticator": "Symfony\\Component\\Security\\Http\\Authenticator\\HttpBasicAuthenticator"
}
                                        DEBUG 20:54:14 security Authenticator does not support the request. 
                                        {
    "firewall_name": "dev",
    "authenticator": "Symfony\\Component\\Security\\Http\\Authenticator\\HttpBasicAuthenticator"
}
                                        DEBUG 20:54:14 event Notified event "debug.security.authorization.vote" to listener "Symfony\Bundle\SecurityBundle\EventListener\VoteListener::onVoterVote". 
                                        {
    "event": "debug.security.authorization.vote",
    "listener": "Symfony\\Bundle\\SecurityBundle\\EventListener\\VoteListener::onVoterVote"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::configure". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\DebugHandlersListener::configure"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\ValidateRequestListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\ValidateRequestListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Nelmio\CorsBundle\EventListener\CorsListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Nelmio\\CorsBundle\\EventListener\\CorsListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\SessionListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\SessionListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::setDefaultLocale". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleListener::setDefaultLocale"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\RouterListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "App\EventListener\Locale\LocaleSubscriber::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "App\\EventListener\\Locale\\LocaleSubscriber::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "ApiPlatform\Core\EventListener\QueryParameterValidateListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\EventListener\\QueryParameterValidateListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleAwareListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleAwareListener::onKernelRequest"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::configureLogoutUrlGenerator". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Bundle\\SecurityBundle\\Debug\\TraceableFirewallListener::configureLogoutUrlGenerator"
}
                                        DEBUG 20:54:14 event Notified event "kernel.request" to listener "Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Bundle\\SecurityBundle\\Debug\\TraceableFirewallListener::onKernelRequest"
}
                                        DEBUG 20:54:14 security Access denied, the user is not fully authenticated; redirecting to authentication entry point. 
                                        {
    "exception": {}
}
                                        DEBUG 20:54:14 security Calling Authentication entry point.
                                        CRITICAL 20:54:14 request Uncaught PHP Exception RuntimeException: "Failed to start the session because headers have already been sent by "/app/vendor/symfony/runtime/Internal/BasicErrorHandler.php" at line 35." at /app/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php line 145 
                                        {
    "exception": {}
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::configure". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\DebugHandlersListener::configure"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\ValidateRequestListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\ValidateRequestListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Nelmio\CorsBundle\EventListener\CorsListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Nelmio\\CorsBundle\\EventListener\\CorsListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\SessionListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\SessionListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::setDefaultLocale". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleListener::setDefaultLocale"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\RouterListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "App\EventListener\Locale\LocaleSubscriber::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "App\\EventListener\\Locale\\LocaleSubscriber::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\EventListener\QueryParameterValidateListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\EventListener\\QueryParameterValidateListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Component\HttpKernel\EventListener\LocaleAwareListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\LocaleAwareListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::configureLogoutUrlGenerator". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Bundle\\SecurityBundle\\Debug\\TraceableFirewallListener::configureLogoutUrlGenerator"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "Symfony\\Bundle\\SecurityBundle\\Debug\\TraceableFirewallListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\EventListener\AddFormatListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\EventListener\\AddFormatListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Sentry\SentryBundle\EventListener\RequestListener::handleKernelRequestEvent". 
                                        {
    "event": "kernel.request",
    "listener": "Sentry\\SentryBundle\\EventListener\\RequestListener::handleKernelRequestEvent"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\EventListener\ReadListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\EventListener\\ReadListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Sentry\SentryBundle\EventListener\TracingRequestListener::handleKernelRequestEvent". 
                                        {
    "event": "kernel.request",
    "listener": "Sentry\\SentryBundle\\EventListener\\TracingRequestListener::handleKernelRequestEvent"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\Security\EventListener\DenyAccessListener::onSecurity". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\Security\\EventListener\\DenyAccessListener::onSecurity"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Sentry\SentryBundle\EventListener\SubRequestListener::handleKernelRequestEvent". 
                                        {
    "event": "kernel.request",
    "listener": "Sentry\\SentryBundle\\EventListener\\SubRequestListener::handleKernelRequestEvent"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\EventListener\DeserializeListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\EventListener\\DeserializeListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "Sentry\SentryBundle\EventListener\TracingSubRequestListener::handleKernelRequestEvent". 
                                        {
    "event": "kernel.request",
    "listener": "Sentry\\SentryBundle\\EventListener\\TracingSubRequestListener::handleKernelRequestEvent"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\Security\EventListener\DenyAccessListener::onSecurityPostDenormalize". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\Security\\EventListener\\DenyAccessListener::onSecurityPostDenormalize"
}
                                        DEBUG 20:54:15 event Notified event "kernel.request" to listener "ApiPlatform\Core\Bridge\Symfony\Bundle\EventListener\SwaggerUiListener::onKernelRequest". 
                                        {
    "event": "kernel.request",
    "listener": "ApiPlatform\\Core\\Bridge\\Symfony\\Bundle\\EventListener\\SwaggerUiListener::onKernelRequest"
}
                                        DEBUG 20:54:15 event Notified event "kernel.controller" to listener "Sentry\SentryBundle\EventListener\RequestListener::handleKernelControllerEvent". 
                                        {
    "event": "kernel.controller",
    "listener": "Sentry\\SentryBundle\\EventListener\\RequestListener::handleKernelControllerEvent"
}
                                        DEBUG 20:54:15 event Notified event "kernel.controller" to listener "Symfony\Bundle\FrameworkBundle\DataCollector\RouterDataCollector::onKernelController". 
                                        {
    "event": "kernel.controller",
    "listener": "Symfony\\Bundle\\FrameworkBundle\\DataCollector\\RouterDataCollector::onKernelController"
}
                                        DEBUG 20:54:15 event Notified event "kernel.controller" to listener "Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::onKernelController". 
                                        {
    "event": "kernel.controller",
    "listener": "Symfony\\Component\\HttpKernel\\DataCollector\\RequestDataCollector::onKernelController"
}
                                        DEBUG 20:54:15 event Notified event "kernel.controller_arguments" to listener "Symfony\Component\HttpKernel\EventListener\ErrorListener::onControllerArguments". 
                                        {
    "event": "kernel.controller_arguments",
    "listener": "Symfony\\Component\\HttpKernel\\EventListener\\ErrorListener::onControllerArguments"
}

                                        Stack Trace

                                        RuntimeException 
                                        RuntimeException:
Failed to start the session because headers have already been sent by "/app/vendor/symfony/runtime/Internal/BasicErrorHandler.php" at line 35.

  at vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:145
  at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
     (vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:352)
  at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->getBag('attributes')
     (vendor/symfony/http-foundation/Session/Session.php:261)
  at Symfony\Component\HttpFoundation\Session\Session->getBag('attributes')
     (vendor/symfony/http-foundation/Session/Session.php:283)
  at Symfony\Component\HttpFoundation\Session\Session->getAttributeBag()
     (vendor/symfony/http-foundation/Session/Session.php:85)
  at Symfony\Component\HttpFoundation\Session\Session->set('_security.dev.target_path', 'http://backend.grading-world.jkweb.dev/_profiler/4f7c9c?panel=request')
     (vendor/symfony/security-http/Util/TargetPathTrait.php:28)
  at Symfony\Component\Security\Http\Firewall\ExceptionListener->saveTargetPath(object(Session), 'dev', 'http://backend.grading-world.jkweb.dev/_profiler/4f7c9c?panel=request')
     (vendor/symfony/security-http/Firewall/ExceptionListener.php:238)
  at Symfony\Component\Security\Http\Firewall\ExceptionListener->setTargetPath(object(Request))
     (vendor/symfony/security-http/Firewall/ExceptionListener.php:207)
  at Symfony\Component\Security\Http\Firewall\ExceptionListener->startAuthentication(object(Request), object(InsufficientAuthenticationException))
     (vendor/symfony/security-http/Firewall/ExceptionListener.php:152)
  at Symfony\Component\Security\Http\Firewall\ExceptionListener->handleAccessDeniedException(object(ExceptionEvent), object(AccessDeniedException))
     (vendor/symfony/security-http/Firewall/ExceptionListener.php:103)
  at Symfony\Component\Security\Http\Firewall\ExceptionListener->onKernelException(object(ExceptionEvent), 'kernel.exception', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:117)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(ExceptionEvent), 'kernel.exception', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:230)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.exception', object(ExceptionEvent))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:59)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch(object(ExceptionEvent), 'kernel.exception')
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:154)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch(object(ExceptionEvent), 'kernel.exception')
     (vendor/symfony/http-kernel/HttpKernel.php:223)
  at Symfony\Component\HttpKernel\HttpKernel->handleThrowable(object(AccessDeniedException), object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:86)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:202)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:35)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (vendor/autoload_runtime.php:35)
  at require_once('/app/vendor/autoload_runtime.php')
     (public/index.php:5)
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