log_error

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 134
      def log_error(request, wrapper)
        logger = logger(request)

        return unless logger

        exception = wrapper.exception
        trace = wrapper.exception_trace

        message = []
        message << "  "
        message << "#{exception.class} (#{exception.message}):"
        message.concat(exception.annotated_source_code) if exception.respond_to?(:annotated_source_code)
        message << "  "
        message.concat(trace)

        log_array(logger, message)
      end