You are totally correct. With the snipped below it was totally possible for the number of sections to be 0. func numberOfSections(in collectionView: UICollectionView) -> Int {     return answerViewModels.count } However just checking in to see why, if it actually exists, any changes to a detection was not made aware in the release notes.

Not sure I'm following you here? Release Notes on a major version of Xcode are a little bit more than just mere notes. In addition, the crash still occurs when numberOfSections is 1 and the numberOfItemsInSection is 0. That was definitely not the case in pervious versions of Xcode.