Padrino::Routing absolut_url ignored the default values on url map

[fidalgo]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

App.absolute_url() doesn't apply subsitution on the provided values in arguments and only uses the default values.
You can find an example in https://github.com/fidalgo/padrino-absolute-url
This line should print:
Path is http://localhost/face/a2a/CA123/agent/008/answered

Also if you add the line:
assert_equal "/pt", @app.url(:index, lang: 'pt')
to https://github.com/padrino/padrino-framework/blob/master/padrino-core/test/test_routing.rb#L1245

I would expect the test to pass

What is the expected behavior?

See previous description

Which versions of Ruby, Padrino, Sinatra, Rack, OS are you using? Did this work in previous versions?

ruby '2.3.3'
'padrino', '0.13.3.3'
sinatra (1.4.7)
Fedora Linux 25

and I suspect it was working on padrino 0.10.6 (yeah a long long time ago)