# File lib/rspec/core/runner.rb, line 6
      def self.autorun
        return if autorun_disabled? || installed_at_exit? || running_in_drb?
        at_exit do
          # Don't bother running any specs and just let the program terminate
          # if we got here due to an unrescued exception (anything other than
          # SystemExit, which is raised when somebody calls Kernel#exit).
          next unless $!.nil? || $!.kind_of?(SystemExit)

          # We got here because either the end of the program was reached or
          # somebody called Kernel#exit.  Run the specs and then override any
          # existing exit status with RSpec's exit status if any specs failed.
          status = run(ARGV, $stderr, $stdout).to_i
          exit status if status != 0
        end
        @installed_at_exit = true
      end