code: def log(error, context, trace = nil)
              msg = String.new
              if error.respond_to?(:backtrace)
                  msg << "unhandled exception: #{error.message} (#{context})"
                  backtrace = error.backtrace
                  msg << "\n#{backtrace.join("\n")}" if backtrace
                  msg << "\n#{trace.join("\n")}" if trace
              else
                  msg << "unhandled exception: #{args}"
              end
              @logger.error msg
          end
docs: This is an unhandled error on the Libuv Event loop