Placeholder attribute ignores non-default translation domain

[maria-p]

Q	A
Bundle version	1.2.3
Symfony version	2.8.6
PHP version	7.0.7

I have form field like that:

$builder->add(
    'message',
    TextType::class,
    [
        'attr' => [
            'placeholder' => 'form.your_message'
        ],
        'translation_domain' => 'form',
        'label' => false
    ]
);

Translation is present in the specified domain, it is displayed properly, but when translation:extract is run, it marks that translation as missing.
With some debugging I found that it somehow gets parsed twice:

• in https://github.com/schmittjoh/JMSTranslationBundle/blob/master/Translation/Extractor/File/FormExtractor.php#L140-L145
• and in https://github.com/schmittjoh/JMSTranslationBundle/blob/master/Translation/Extractor/File/FormExtractor.php#L127-L133

and second time it does not get the right domain passed.

[jroussel]

Any news on this bug?

[gnat42]

This package is barely maintained. If you have a PR I can review and tests pass I can merge it but I haven't had time to do much here for awhile and neither have the other maintainers unfortunately.