bug.swift

func index(countries: [Country]) {
    let attributeSet = CSSearchableItemAttributeSet(itemContentType: kUTTypePNG as String)

    let items = countries.map { (country) -> CSSearchableItem in
      attributeSet.title = country.name.common
      attributeSet.contentDescription = "The flag of \(country.name.official)"
      attributeSet.thumbnailData = UIImage(named: country.flagImageName)!.pngData()!

      return CSSearchableItem(
        uniqueIdentifier: country.id,
        domainIdentifier: "com.richardrobinson.vexillum",
        attributeSet: attributeSet
      )
    }

    CSSearchableIndex.default().indexSearchableItems(items) { error in
      if let error = error {
        fatalError(error.localizedDescription)
      }
    }
  }