Symfony version(s) affected

7.4

Description

Upgrading my project to Symfony 8.0 lead to a lot of broken code. I didnt know why, because I never got any deprecations.
Ive set error_reporting(E_ALL) and used the Monolog log handler to write everything to file.
Nothing pops up.
I've registered the logger via Monolog\ErrorHandler::register($logger).

In the Symfony\Component\Console\Application line 558 (in v7.4) a function called trigger_deprecation() is called which should have notified me, that my code will be broken in 8.0, but I never got it!
Turns out: trigger_deprecation() executes @trigger_error().
The monolog error handle compares the (new) value of error_reporting() to E_USER_DEPRECATED and wont log it to file. Because with the @ the error_reporting() is now set to 4437 (instead of E_ALL) before!

So every deprecation CANT get logged with monolog! They only way to get them to log is NOT using Monolog\ErrorHandler::register($logger), instead use this:

$handler = new ErrorHandler($logger);
$handler->registerErrorHandler(handleOnlyReportedErrors: false);
$handler->registerExceptionHandler();
$handler->registerFatalHandler();

How to reproduce

require_once 'vendor/autoload.php';

$logger = new \Monolog\Logger(
    'logger',
    [new \Monolog\Handler\StreamHandler(__DIR__ . '/error.log', \Monolog\Logger::DEBUG)]
);

// DOES NOT LOG ANYTHING:
\Monolog\ErrorHandler::register($logger);

// INSTEAD USE THIS:
$handler = new \Monolog\ErrorHandler($logger);
$handler->registerErrorHandler(handleOnlyReportedErrors: false);

$application = new \Symfony\Component\Console\Application();
$application->add(new \Symfony\Component\Console\Command\Command('abc'));

Possible Solution

No response

Additional Context

No response