if strings.HasPrefix(name, "___Z") {
		// clang extensions
		block := strings.LastIndex(name, "_block_invoke")
		if block == -1 {
			return nil, ErrNotMangledName
		}
		a, err := doDemangle(name[4:block], options...)
		if err != nil {
			return a, adjustErr(err, 4)
		}
		name = strings.TrimPrefix(name[block:], "_block_invoke")
		if len(name) > 0 && name[0] == '_' {
			name = name[1:]
		}