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@somebee
Created October 15, 2010 10:14
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config.middleware.use 'Rack::Profiler'
...
gem 'ruby-prof', :require => 'ruby-prof'
gem 'rack-contrib', :require => 'rack/contrib'
...
/Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/http/mime_type.rb:98: warning: already initialized constant CSV
/Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/bundler/gems/rspec-core-91144dc0fc9b/lib/rspec/core/backward_compatibility.rb:20:in `const_missing': uninitialized constant Rack::RubyProf::CallTreePrinter (NameError)
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/bundler/gems/rspec-expectations-d1653d789cc0/lib/rspec/expectations/backward_compatibility.rb:6:in `const_missing'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/rack-contrib-1.0.1/lib/rack/contrib/profiler.rb:19:in `<class:Profiler>'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/rack-contrib-1.0.1/lib/rack/contrib/profiler.rb:8:in `<module:Rack>'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/rack-contrib-1.0.1/lib/rack/contrib/profiler.rb:3:in `<top (required)>'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/activesupport-3.0.0/lib/active_support/inflector/methods.rb:124:in `const_get'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/activesupport-3.0.0/lib/active_support/inflector/methods.rb:124:in `block in constantize'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/activesupport-3.0.0/lib/active_support/inflector/methods.rb:123:in `each'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/activesupport-3.0.0/lib/active_support/inflector/methods.rb:123:in `constantize'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:14:in `klass'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:33:in `build'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:79:in `block in build'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:79:in `each'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:79:in `inject'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/stack.rb:79:in `build'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application.rb:162:in `app'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application/finisher.rb:35:in `block in <module:Finisher>'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `instance_exec'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `run'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/initializable.rb:50:in `block in run_initializers'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `each'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `run_initializers'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application.rb:134:in `initialize!'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application.rb:77:in `method_missing'
from /Users/sindre/Code/iono/config/environment.rb:5:in `<top (required)>'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application.rb:103:in `require'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/application.rb:103:in `require_environment!'
from /Users/sindre/Code/iono/vendor/gems/ruby/1.9.1/gems/railties-3.0.0/lib/rails/commands.rb:22:in `<top (required)>'
from script/rails:9:in `require'
from script/rails:9:in `<main>'
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ghost commented Feb 14, 2012

I got same issue but it resolved after using mirakui fork in my Gemfile.

gem 'rack-contrib', :git => "https://github.com/mirakui/rack-contrib.git"

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