Symfony version(s) affected

6.0.2

Description

Hi,

With Symfony/Console 6.0.2 and PHP 8.1, there is a depreciation on the method Symfony\Component\Console\Question\ChoiceQuestion::getDefaultValidator() (click on the link to see the line of the issue) :

PHP Deprecated : trim() : Passing null to parameter #1 ($string) of type string is deprecated.

This happens when the default value for the question is null.

How to reproduce

// Method definition : https://github.com/symfony/console/blob/v6.0.2/Style/SymfonyStyle.php#L277
$io->choice('Select the queue to analyze', ['queue1', 'queue2', 'queue3']); // The 3rd argument must be `null`.

Possible Solution

We can simply cast the variable to string to fix the issue. Just like this at this line:

-$selectedChoices[$k] = trim($v);
+$selectedChoices[$k] = trim((string) $v);

Additional Context

No response