# File lib/merb-core/test/run_spec.rb, line 10
        def dump_failure(counter, failure)
          output = @options.error_stream
          output.puts
          output.puts "#{counter.to_s})"
          output.puts colourise("#{failure.header}\n#{failure.exception.message}", failure)
          output.puts format_backtrace(failure.exception.backtrace)
          output.flush
        end