ctrl-C stacktrace when the dreaded Rails 3.1 method missing freeze happens

gistfile1.txt

  Company Load (0.2ms)  SELECT "companies".* FROM "companies" WHERE "companies"."id" IS NULL LIMIT 1
  UserReportSection Load (0.5ms)  SELECT "user_report_sections".* FROM "user_report_sections" WHERE "user_report_sections"."user_report_id" = 1
Rendered user_reports/_user_report_section.html.erb (60200.0ms)
Rendered user_reports/_form.html.erb (60223.1ms)
Rendered user_reports/edit.html.erb within layouts/company (60224.0ms)
Completed 500 Internal Server Error in 60280ms

ActionView::Template::Error (undefined method `radio_box' for #<ActionView::Helpers::FormBuilder:0x107f4b0e8>):
    25:       <td>
    26:         <label>Report On</label><br />
    27:         <% f.object.report_on ||= "product" %>
    28:         <%= f.radio_box( :report_on, "product" ) %> Chemical Usage<br />
    29:         <%= f.radio_box( :report_on, "seed" ) %> Seed Usage<br />
    30:         <br />
    31:         <label>Statistics</label><br />
  app/views/user_reports/_user_report_section.html.erb:28:in `_app_views_user_reports__user_report_section_html_erb__1994846421_2214218460'
  app/helpers/application_helper.rb:620:in `new_child_fields'
  app/helpers/application_helper.rb:618:in `new_child_fields'
  app/helpers/application_helper.rb:26:in `add_child_link'
  app/views/user_reports/_form.html.erb:40:in `_app_views_user_reports__form_html_erb__978914503_2215910320'
  app/views/user_reports/_form.html.erb:7:in `_app_views_user_reports__form_html_erb__978914503_2215910320'
  app/views/user_reports/edit.html.erb:2:in `_app_views_user_reports_edit_html_erb___218946991_2216398260'
  app/controllers/application_controller.rb:334:in `set_current_user_on_model'

Rendered /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/actionpack/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
Rendered /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/actionpack/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.8ms)
Rendered /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/actionpack/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (4.5ms)
/Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/activesupport/lib/active_support/whiny_nil.rb:48:in `method_missing': undefined method `shutdown' for nil:NilClass (NoMethodError)
	from /Users/matt/.rvm/gems/[email protected]/gems/rack-1.3.2/lib/rack/handler/webrick.rb:24:in `shutdown'
	from /Users/matt/.rvm/gems/[email protected]/gems/rack-1.3.2/lib/rack/server.rb:259:in `start'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:113:in `call'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:113:in `join'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:113:in `start'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:113:in `each'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:113:in `start'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:23:in `start'
	from /Users/matt/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/1.8/webrick/server.rb:82:in `start'
	from /Users/matt/.rvm/gems/[email protected]/gems/rack-1.3.2/lib/rack/handler/webrick.rb:13:in `run'
	from /Users/matt/.rvm/gems/[email protected]/gems/rack-1.3.2/lib/rack/server.rb:265:in `start'
	from /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/railties/lib/rails/commands/server.rb:70:in `start'
	from /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/railties/lib/rails/commands.rb:54
	from /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/railties/lib/rails/commands.rb:49:in `tap'
	from /Users/matt/.rvm/gems/[email protected]/bundler/gems/rails-7ee15e8a0f84/railties/lib/rails/commands.rb:49
	from script/rails:6:in `require'
	from script/rails:6