rails/rails — pull request #13296 by psahni (2013-12-12 14:37:37+00:00)
Title: form_tag with action parameter explicitly inside hash does not work

I am using rails-4.0.1 and ruby 2.0.0-rc2.
Please see the screenshot of the exception.

The form_tag description is here:
http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-form_tag