# File lib/rspec/core/configuration.rb, line 260
      def cleaned_from_backtrace?(line)
        # TODO (David 2011-12-25) why are we asking the configuration to do
        # stuff? Either use the patterns directly or enapsulate the filtering
        # in a BacktraceCleaner object.
        backtrace_clean_patterns.any? { |regex| line =~ regex }
      end