ruby - Routing/Config errors when upgrading to rails 4 -

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i installed ruby 2 , rails 4, , created new project. made devise user, , went run server. got error 

/users/michaeldunnegan/.rvm/gems/ruby-2.0.0-p247@rails-4.0.0/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated': rails::application::routesreloader#execute_if_updated delegated updater.execute_if_updated, updater nil: #<rails::application::routesreloader:0x007f85ac132458 @paths=["/users/michaeldunnegan/projects/soundshare/config/routes.rb"], @route_sets=[#<actiondispatch::routing::routeset:0x007f85ac188e48>]> (runtimeerror)

i have absolutely no idea do. configuration pretty weird me. think error might in path, whatever is, can't sure.

my rvm current looks like: ruby-2.0.0-p247@rails-4.0.0, if that's relevant

this known bug rails 4 , devise.

please see rails issue on github


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