Crash in UnplashExample sample about parchment HOT 3 CLOSED

  func itemWidth(for pagingItem: T) -> CGFloat {
    if let width = widthCache[pagingItem] {
      return width
    } else {
      let width = widthForPagingItem?(pagingItem, false)
      width.flatMap({ widthCache[pagingItem] = $0  })    //CHANGED LINE  
      return width ?? options.estimatedItemWidth
    }
  }

struct ImageItem: PagingItem, Hashable, Comparable {
  let index: Int
  let title: String
  let headerImage: UIImage
  let images: [UIImage]
  
  var hashValue: Int {
    //The sum of two Integer throw overflow exception in my simulator 
    //return title.hashValue + headerImage.hashValue
    
    // I think this fix is good for example app 
    return title.hashValue/2 + headerImage.hashValue/2   //CHANGED LINE  
  }
  ......