How to parse JSON to XML Goalng

I need to create a XML file from JSON file, if the element is empty it will not show on the XML.
But it finally return Goroutine.
How can I fix the code, thanks.

This is my expection.

This is my follow code, but I didn’t know why it cause Goroutine.

j

type CPE struct {
    Deprecated   bool   `json:"deprecated"`
    LastModified string `json:"lastModified"`
    Refs []struct {
        Ref  string `json:"ref"`
        Type string `json:"type"`
    } `json:"refs"`
    DeprecatedBy []struct {
        CpeName   string `json:"cpeName"`
        CpeNameID string `json:"cpeNameId"`
    } `json:"deprecatedBy"`
    Deprecates []struct {
        CpeName   string `json:"cpeName"`
        CpeNameID string `json:"cpeNameId"`
    } `json:"deprecates"`
}
type CPEXmlItem struct {
    XMLName         xml.Name     `xml:"cpe-item"`
    Deprecated      bool         `xml:"deprecated,attr"`
    Reference       *struct {
        Items []ItemReference `xml:"reference,omitempty"`
    } `xml:"references,omitempty"`
    CPE23 struct {
        XMLName     xml.Name `xml:"cpe-23:cpe23-item,omitempty"`
        Name        string   `xml:"name,attr"`
        Deprecation *struct {
            Date string `xml:"date,attr,omitempty"`
            By   *struct {
                Name string `xml:"name,attr,omitempty"`
                Type string `xml:"type,attr,omitempty"`
            } `xml:"cpe-23:deprecated-by,omitempty"`
        } `xml:"cpe-23:deprecation,omitempty"`
    }
}
func jsonToXml(p nvd.Product, xml *nvd.CPEXmlItem) {
    if p.CPE.Deprecated {
        xml.Deprecated = p.CPE.Deprecated
        xml.DeprecationDate = p.CPE.LastModified
        for r := range p.CPE.Refs {
            ref := nvd.ItemReference{
                Text: p.CPE.Refs[r].Type,
                Href: p.CPE.Refs[r].Ref,
            }
            xml.Reference.Items = append(xml.Reference.Items, ref)
        }
        xml.CPE23.Deprecation.Date = p.CPE.LastModified
        xml.CPE23.Deprecation.By.Name = p.CPE.DeprecatedBy[0].CpeName
    }
    return
}`