if err != nil {
			return nil, err
		}
	}

	// Symbolize the merged profile.
	if err := o.Sym.Symbolize(s.Symbolize, m, p); err != nil {
		return nil, err
	}
	p.RemoveUninteresting()
	unsourceMappings(p)

	if s.Comment != "" {
		p.Comments = append(p.Comments, s.Comment)
	}

	// Save a copy of the merged profile if there is at least one remote source.
	if save {