Symfony\Component\Console\Helper\DialogHelper is deprecated and cause Uncaught exception

[kesonno]

Calling the ./vendor/bin/composerCommandIntegrator.php fail with the following output:

PHP Deprecated:  "Symfony\Component\Console\Helper\DialogHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\QuestionHelper" instead. in /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Helper/DialogHelper.php on line 34
PHP Deprecated:  "Symfony\Component\Console\Helper\ProgressHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\ProgressBar" instead. in /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Helper/ProgressHelper.php on line 123
PHP Fatal error:  Uncaught exception 'ErrorException' with message '"Symfony\Component\Console\Helper\DialogHelper" is deprecated since version 2.5 and will be removed in 3.0. Use "Symfony\Component\Console\Helper\QuestionHelper" instead.' in /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Helper/DialogHelper.php:34
Stack trace:
#0 [internal function]: Composer\Util\ErrorHandler::handle(16384, '"Symfony\\Compon...', '/private/var/ww...', 34, Array)
#1 /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Helper/DialogHelper.php(34): trigger_error('"Symfony\\Compon...', 16384)
#2 /private/var/www/eurofides/vendor/composer/composer/src/Composer/Console/Application.php(327): Symfony\Component\Console\Helper\DialogHelper->__construct()
#3 /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Application.php(88): Composer\Console\Application->getDefaultHelperSet()
#4 /private/var/www/eurofides/vendor/composer/composer/src/Composer/Console/Application.php(69): S in /private/var/www/eurofides/vendor/symfony/console/Symfony/Component/Console/Helper/DialogHelper.php on line 34

Unfortunately turning off E_USER_DEPRECATED in error_reporting is not enought, because Composer\Util\ErrorHandler::handle throw anyway an exception.

[TimVroom]

Well this is a bug from Composer itself.

If i look at the composer/composer/src/Composer/Console/Application.php(327) line, it says:

$helperSet->set(new DialogHelper());

Changing this to:

$helperSet->set(new DialogHelper(false));

Solves the problem for me. Bit weird though, but yeah... If we take a look in the getDefaultHelperSet they use the same method and already define the dialoghelper, so i suppose we can remove the whole line 327...

[Flyingmana]

I will refine the composer.json to avoid installing a newer version of the console package, as long as composer uses the older version.
But this needs some time, there seems to be another bug for version resolution

[Flyingmana]

just tagged version 1.1, in my tests now correctly an older console version is installed, can you verify this?

Hey @Flyingmana I'm still seeing this error in v1.2

[Flyingmana]

now having 1.2.1 with a fix for this problem, does this work now for you all?