I don't know who lumen is or what exactly your bug is, but I have
experienced a bug with various actionview related items.
Specifically value(object) calls in form_helper*.rb
ActionView::TemplateError: wrong number of arguments (1 for 0)
On line #32 of app/views/grants/_form.rhtml
29: <%= text_field 'grant', 'ras_award_number' %></p>
31: <p><label for="grant_pi_id">Principle Investigator</label><br/>
32: <%= collection_select 'grant', 'pi_id', @pis, 'id', 'name'
34: <p><label for="grant_project_title">Project Title</label><br/>
35: <%= text_field 'grant', 'project_title' %></p>
It does the same thing on datetime_select and other actionview calls.
In the example above, the problem is in line 308 of
forms_options_helper.rb. If you comment out that line it works.
My rails foo isn't good enough to patch it right now and I don't have
the energy to debug value(object), but I suspect this will be
caught swiftly and resolved. Although, I don't know how it got into the
release to be honest. I would have thought someone's tests would
have caught it.
I'm running frozen rails 1.2RC2.