Does a failure to object to a probation condition at trial constitute a forfeiture of the claim on appeal?

Generally, the failure to object to the reasonableness of a probation condition at trial constitutes a forfeiture of the claim on appeal. (People v. Welch (1993) 5 Cal.4th 228, 237.) Appellant failed to object on reasonableness grounds at trial. Since we cannot evaluate the reasonableness of this probation condition without examining the application of the condition to appellant's individual circumstances, it is not a pure issue of law. Having failed to raise the issue before the juvenile court, appellant forfeited his right to challenge the condition on appeal.