title: Padrino with RVM gemsets: uninitialized constant ActiveSupport::Deprecation
body: <p>I'm getting an error trying to run an app, not even trying to do anything sophisticated either, just get the basic thing running... Just wondering if anyone can give me any pointers as to how to debug it. I suspect it might be to do with RVM gemsets, but I'm not sure...</p>
  
  <p>Here's the error message I'm receiving:</p>
  
  <pre><code>NameError: uninitialized constant ActiveSupport::Deprecation
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/rake-0.9.2.2/lib/rake/ext/module.rb:36:in `const_missing'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/activesupport-3.2.1/lib/active_support/core_ext/module/deprecation.rb:7:in `deprecate'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/activesupport-3.2.1/lib/active_support/core_ext/module/synchronization.rb:44:in `&lt;class:Module&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/activesupport-3.2.1/lib/active_support/core_ext/module/synchronization.rb:6:in `&lt;top (required)&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/activesupport-3.2.1/lib/active_support/core_ext/module.rb:8:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/activesupport-3.2.1/lib/active_support/core_ext/module.rb:8:in `&lt;top (required)&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-core-0.9.21/lib/padrino-core/support_lite.rb:13:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-core-0.9.21/lib/padrino-core/support_lite.rb:13:in `&lt;top (required)&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-core-0.9.21/lib/padrino-core.rb:2:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-core-0.9.21/lib/padrino-core.rb:2:in `&lt;top (required)&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-0.9.21/lib/padrino.rb:2:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@marathon_site/gems/padrino-0.9.21/lib/padrino.rb:2:in `&lt;top (required)&gt;'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:68:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:66:in `each'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:66:in `block in require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:55:in `each'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler/runtime.rb:55:in `require'
  ~/Developer/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.1.rc.7/lib/bundler.rb:118:in `require'
  ~/Documents/Projects/MarathonSite/config/boot.rb:8:in `&lt;top (required)&gt;'
  </code></pre>
  
  <p>I have activesupport 3.2.1 listed in the gemset with my project, so I'm not entirely sure why it's complaining. Any pointers as to what's going on would be appreciated, so I can debug this kind of thing in the future.</p>