title: Rails 3.2.0 rspec debugger not working
body: <p>I've just upgraded to ruby 1.9.3-p0 and rails 3.2.0. I'm now trying to debug an error in one of my tests using </p>
  
  <pre><code>rspec spec -d
  </code></pre>
  
  <p>But I get this error:</p>
  
  <pre><code>/home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:422:in `rescue in debug=':  (RuntimeError)
  **************************************************
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.so: undefined symbol: ruby_threadptr_data_type - /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.so
  
  If you have it installed as a ruby gem, then you need to either require
  'rubygems' or configure the RUBYOPT environment variable with the value
  'rubygems'.
  
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug-base19-0.11.25/lib/ruby-debug-base.rb:1:in `require'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug-base19-0.11.25/lib/ruby-debug-base.rb:1:in `&lt;top (required)&gt;'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `require'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `&lt;top (required)&gt;'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:408:in `require'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:408:in `debug='
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:19:in `block in configure'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:18:in `each'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:18:in `configure'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/command_line.rb:21:in `run'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:80:in `run_in_process'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:69:in `run'
  /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:10:in `block in autorun'
  **************************************************
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration.rb:407:in `debug='
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:19:in `block in configure'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:18:in `each'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/configuration_options.rb:18:in `configure'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/command_line.rb:21:in `run'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:80:in `run_in_process'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:69:in `run'
      from /home/map7/.rvm/gems/ruby-1.9.3-p0@rails3.2/gems/rspec-core-2.8.0/lib/rspec/core/runner.rb:10:in `block in autorun'
  </code></pre>