[Doctrine Bridge] Doctrine Extractor throws an exception with index-by over custom mapping type #35542
Description
Symfony version(s) affected: 4.4.3
Description
I have custom Doctrine types, eg:
doctrine:
dbal:
types:
users_user_id: Base\Infrastructure\Doctrine\Type\UsersUserId
After upgrading to 4.4.3 the DoctrineExtractor throws an exception:
Argument 1 passed to Symfony\Component\PropertyInfo\Type::__construct() must be of the type string, null given, called in /var/www/html/vendor/symfony/doctrine-bridge/PropertyInfo/DoctrineExtractor.php on line 126
This happens with index-by over custom mapping type, eg:
<many-to-many field="managers" target-entity="Base\Users\Domain\Model\User" index-by="id" />
Additional context
