# File lib/rspec/core/configuration.rb, line 243
      def debug=(bool)
        return unless bool
        begin
          require 'ruby-debug'
          Debugger.start
        rescue LoadError
          raise "\n\#{'*'*50}\nYou must install ruby-debug to run rspec with the --debug option.\n\nIf you have ruby-debug installed as a ruby gem, then you need to either\nrequire 'rubygems' or configure the RUBYOPT environment variable with\nthe value 'rubygems'.\n\#{'*'*50}\n"
        end
      end