Heroku 不会部署。我收到以下错误：
2013-07-20T05:46:05.382706+00:00 heroku[web.1]: Starting process with command `bundle exec rails server -p 15871`
2013-07-20T05:46:10.657881+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)
2013-07-20T05:46:10.658274+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)
2013-07-20T05:46:13.705246+00:00 app[web.1]: => Booting WEBrick
2013-07-20T05:46:13.705246+00:00 app[web.1]: => Rails 3.2.13 application starting in production on http://0.0.0.0:15871
2013-07-20T05:46:13.705246+00:00 app[web.1]: => Call with -d to detach
2013-07-20T05:46:13.705246+00:00 app[web.1]: => Ctrl-C to shutdown server
2013-07-20T05:46:13.705246+00:00 app[web.1]: Connecting to database specified by DATABASE_URL
2013-07-20T05:46:18.032181+00:00 app[web.1]: Exiting
2013-07-20T05:46:18.035248+00:00 app[web.1]: /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:317:in `rescue in depend_on': No such file to load -- debugger (LoadError)
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:312:in `depend_on'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:225:in `require_dependency'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:439:in `block (2 levels) in eager_load!'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:438:in `each'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:438:in `block in eager_load!'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:436:in `each'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/engine.rb:436:in `eager_load!'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/application/finisher.rb:53:in `block in <module:Finisher>'
2013-07-20T05:46:18.035248+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing'
2013-07-20T05:46:18.035421+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `block in require'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:251:in `require'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/config.ru:in `new'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/config.ru:in `<main>'
2013-07-20T05:46:18.043408+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
2013-07-20T05:46:18.043631+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands/server.rb:46:in `app'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in `start'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:55:in `block in <top (required)>'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:50:in `<top (required)>'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from script/rails:6:in `require'
2013-07-20T05:46:18.045133+00:00 app[web.1]: from script/rails:6:in `<main>'
2013-07-20T05:46:19.556879+00:00 heroku[web.1]: Process exited with status 1
2013-07-20T05:46:19.566212+00:00 heroku[web.1]: State changed from starting to crashed
我的 Gemfile（也没有 Gemfile.lock）中没有调试器。顺便说一句，当我的 Gemfile 指定 1.9.3 时，Heroku 要求使用 ruby 1.9.1。
我已经运行 'rvm gemset create [myapp]' 和 'rvm gemset use [myapp]' 来强制我的本地 rails 使用本地 gemset（而不是系统 gem），并且应用程序在本地运行没有问题。
基本上，它说它正在寻找调试器。我不明白为什么会这样。任何（有用的）见解将不胜感激。