Function wrap

fs/fserrors/error_test.go:29–37

wrap returns an error annotating err with a stack trace at the point Wrap is called, and the supplied message. If err is nil, Wrap returns nil.

(err error, message string)

// at the point Wrap is called, and the supplied message.
// If err is nil, Wrap returns nil.
func wrap(err error, message string) error {
	if err == nil {
		return nil
	}
	return &withMessage{
		cause: err,
		msg:   message,
	}
}

var errUseOfClosedNetworkConnection = errors.New("use of closed network connection")