recover and set state

recover.go

func do(ctx context.Context) (res *Result) {
	defer func() {
		if r := recover(); r != nil {
			trace := make([]byte, 1024*10)
			count := runtime.Stack(trace, true)

			switch tr := r.(type) {
			case error:
				res = &Result{
					Err: tr,
				}
			default:
				res = &Result{
					Err: fmt.Errorf("%v", tr),
				}
			}

			logrus.Warnf("panic %s", res.Err.Error())
			logrus.Warnf("Stack of %d bytes: %s\n", count, string(trace[:count]))
		}
	}()
	res = doCore(ctx)
	return
}