With version 2.5, if I have a form and a constraint with UniqueEntity, the error is not added to the designated form field, but to the main form, errorPath also doesn't work.

Error should be in my case:
Object(Symfony\Component\Form\Form).children[username].data = test

But its:
Object(Symfony\Component\Form\Form).data.data.username = test

I created an example, where the problem exists:
https://github.com/ghostika/symfony-bug

Only composer.install needed and then call the /formtest route

Tried to change the validation API version to 2.5 from my auto value (2.5 bc breaks) but it throw an Exception.