NameError: undefined local variable or method `this_variable_has_not_been_set' for #<HomeController:0x00000007a5a3a0>

[rollbardemo]

View details in Rollbar: https://rollbar.com/item/145379608/

  File "/app/app/controllers/home_controller.rb", line 6, in cause_server_side_exception
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/implicit_render.rb", line 4, in send_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/abstract_controller/base.rb", line 167, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/rendering.rb", line 10, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/abstract_controller/callbacks.rb", line 18, in block in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 414, in _run__2867982513484593398__process_action__1832604198329308912__callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 405, in __run_callback
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 385, in _run_process_action_callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 81, in run_callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/abstract_controller/callbacks.rb", line 17, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/rescue.rb", line 29, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/instrumentation.rb", line 30, in block in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/notifications.rb", line 123, in block in instrument
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/notifications/instrumenter.rb", line 20, in instrument
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/notifications.rb", line 123, in instrument
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/instrumentation.rb", line 29, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/params_wrapper.rb", line 207, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/railties/controller_runtime.rb", line 18, in process_action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/abstract_controller/base.rb", line 121, in process
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/abstract_controller/rendering.rb", line 45, in process
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal.rb", line 203, in dispatch
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal/rack_delegation.rb", line 14, in dispatch
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_controller/metal.rb", line 246, in block in action
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb", line 73, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb", line 73, in dispatch
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb", line 36, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/journey-1.0.4/lib/journey/router.rb", line 68, in block in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/journey-1.0.4/lib/journey/router.rb", line 56, in each
  File "/app/vendor/bundle/ruby/1.9.1/gems/journey-1.0.4/lib/journey/router.rb", line 56, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/routing/route_set.rb", line 612, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb", line 35, in block in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb", line 34, in catch
  File "/app/vendor/bundle/ruby/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb", line 34, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/best_standards_support.rb", line 17, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/etag.rb", line 23, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/conditionalget.rb", line 25, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/head.rb", line 14, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/params_parser.rb", line 21, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/flash.rb", line 242, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/session/abstract/id.rb", line 210, in context
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/session/abstract/id.rb", line 205, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/cookies.rb", line 341, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/query_cache.rb", line 64, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 479, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/callbacks.rb", line 28, in block in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 405, in _run__3125785581052449754__call__307688389590198688__callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 405, in __run_callback
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 385, in _run_call_callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/callbacks.rb", line 81, in run_callbacks
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/callbacks.rb", line 27, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/remote_ip.rb", line 31, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/debug_exceptions.rb", line 16, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rollbar-0.9.2/lib/rollbar/middleware/rails/show_exceptions.rb", line 13, in call_with_rollbar
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/show_exceptions.rb", line 56, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb", line 32, in call_app
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb", line 16, in block in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/tagged_logging.rb", line 22, in tagged
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/logger.rb", line 16, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/request_id.rb", line 22, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/methodoverride.rb", line 21, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/runtime.rb", line 17, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/cache/strategy/local_cache.rb", line 72, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/lock.rb", line 15, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.13/lib/action_dispatch/middleware/static.rb", line 63, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb", line 136, in forward
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb", line 245, in fetch
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb", line 185, in lookup
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb", line 66, in call!
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.2/lib/rack/cache/context.rb", line 51, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb", line 479, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/application.rb", line 223, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/content_length.rb", line 14, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/rack/log_tailer.rb", line 17, in call
  File "/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/handler/webrick.rb", line 59, in service
  File "/usr/local/lib/ruby/1.9.1/webrick/httpserver.rb", line 111, in service
  File "/usr/local/lib/ruby/1.9.1/webrick/httpserver.rb", line 70, in run
  File "/usr/local/lib/ruby/1.9.1/webrick/server.rb", line 183, in block in start_thread
NameError: undefined local variable or method `this_variable_has_not_been_set' for #<HomeController:0x00000007a5a3a0>