reproduce symfony/symfony#27493

app-AppKernel.php

<?php declare(strict_types=1);

use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\HttpKernel\Kernel;

class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = [
            new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
            new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
        ];

        if (in_array($this->getEnvironment(), ['dev', 'test'], true)) {
            $bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
        }

        return $bundles;
    }

    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        $loader->load($this->getRootDir() . '/config.yml');
    }
}

app-config.yml

parameters:
    secret: 'not-so-secret'

framework:
    #esi: ~
    secret: '%secret%'
    trusted_hosts: ~
    fragments: ~
    http_method_override: true
    php_errors:
        log: true

bin-console

#!/usr/bin/env php
<?php

use Symfony\Bundle\FrameworkBundle\Console\Application;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Debug\Debug;

// if you don't want to setup permissions the proper way, just uncomment the following PHP line
// read https://symfony.com/doc/current/setup.html#checking-symfony-application-configuration-and-setup
// for more information
//umask(0000);
set_time_limit(0);

require __DIR__.'/../vendor/autoload.php';

$input = new ArgvInput();
$env = $input->getParameterOption(['--env', '-e'], getenv('SYMFONY_ENV') ?: 'dev');
$debug = getenv('SYMFONY_DEBUG') !== '0' && !$input->hasParameterOption(['--no-debug', '']) && $env !== 'prod';

if ($debug) {
    Debug::enable();
}

$kernel = new AppKernel($env, $debug);
$application = new Application($kernel);
$application->run($input);

composer.json

{
    "autoload": {
        "classmap": [
            "app/AppKernel.php"
        ]
    },
    "require": {
        "symfony/yaml": "^4.0",
        "sensio/distribution-bundle": "^5.0",
        "sensio/framework-extra-bundle": "^5.1"
    },
    "require-dev": {
        "symfony/debug-bundle": "^4.0"
    }
}