wrong number of arguments (0 for 1..2) Rails 4.2.0 and Ruby 2.2.2 - ruby-on-rails-4.2

Question

I'm trying to embedded mail_form into my home page.
The 'contacts#new' is rendered on 'static_pages#home' so I instantiate #contact in StaticPagesController's home action to avoid the "First argument in form cannot contain nil or be empty" error.
But I now I get wrong number of arguments (0 for 1..2) errors instead.
I see this behaviour since I updated my ruby to 2.2.2.
Do you think this error is caused by new specification on Ruby, or it is just my simple code error?
static_pages_controller
class StaticPagesController < ApplicationController
def home
#contact = Contact.new
end
end
views/static_pages/home.html.erb
<section id="contact">
<%= render template: 'contacts/new' %>
</section>
contacts_controller
class ContactsController < ApplicationController
def new
#contact = Contact.new
end
def create
#contact = Contact.new(contact_params)
#contact.request = request
if #contact.deliver
flash.now[:notice] = "Thank you for your message. We will contact you soon!"
else
flash.now[:error] = "Cannot send message."
render 'new'
end
end
private
def contact_params
params.require(:contact).permit(:name, :email, :message)
end
end
views/contacts/new.html.erb
<%= form_for(#contact) do |f| %>
...
<% end %>
Logs
Processing by StaticPagesController#home as HTML
Rendered contacts/new.html.erb (23.5ms)
Rendered static_pages/home.html.erb within layouts/application (238.2ms)
Completed 500 Internal Server Error in 278ms
ArgumentError (wrong number of arguments (0 for 1..2)):
app/views/contacts/new.html.erb:28:in `block in_app_views_contacts_new_html_erb___4238619170782302276_70113984753480'

Answer 1

I update my version of 'byebug' to '4.0.1' and 'Web-console' to '2.1.2', then it shows where was the error. It was actually really stupid ...
Error:
<%= form_for(#contact) do |f| %>
<%= t.email_field ... %>
...
<% end %>
Correct:
<%= form_for(#contact) do |f| %>
<%= f.email_field ... %>
...
<% end %>