nullable_type_declaration_for_default_null_value causes a parse error on 2.18.3

[vudaltsov]

Bug report

• PHP 8.0.2 (cli) (built: Feb 4 2021 18:10:29) ( NTS )
• PHP CS Fixer 2.18.3 Remote Void by Fabien Potencier and Dariusz Ruminski
• php vendor/bin/php-cs-fixer fix --show-progress=estimating-max -vvv

With 'nullable_type_declaration_for_default_null_value' => true the code below produces

[PhpCsFixer\Linter\LintingException] Parse error: syntax error, unexpected token "#[" on line 14.

<?php

declare(strict_types=1);

namespace HappyInc\Import\CompanyStructureImport;

use Symfony\Component\Validator\Constraints as Assert;

final class CompanyStructureImportRow
{
    public function __construct(
        #[Assert\Count(min: 1, minMessage: 'Пустая цепочка департаментов.')]
        public array $departmentTitleChain,
        #[Assert\NotBlank(message: 'Пустой email.', allowNull: true)]
        #[Assert\Email(message: 'Некорректный email {{ value }}.')]
        public ?string $email = null,
    ) {
    }
}

Disabling nullable_type_declaration_for_default_null_value fixes the issue.

[keradus]

I think we may not support attributes on parameter level at all.
can you raise a PR to improve the situation, @vudaltsov ?

[vudaltsov]

@keradus , I'm pretty busy this month. I will try to find some time, though.

[kubawerlos]

This is fixed by #5665.