/usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `require': no such file to load -- test/unit/error (MissingSourceFile)
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `block in require'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `require'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/deprecation.rb:224:in `<top (required)>'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `require'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `block in require'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:521:in `new_constants_in'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support/dependencies.rb:153:in `require'
        from /usr/lib/ruby/gems/1.9.1/gems/activesupport-2.2.3/lib/active_support.rb:37:in `<top (required)>'
        from /usr/lib/ruby/gems/1.9.1/gems/rails-2.2.3/lib/commands/server.rb:1:in `require'
        from /usr/lib/ruby/gems/1.9.1/gems/rails-2.2.3/lib/commands/server.rb:1:in `<top (required)>'
        from ./server:3:in `require'
        from ./server:3:in `<main>'