A user reported that using Realm Objective-C from Swift doesn't iterate over a frozen TableView when SequenceType-enumerating an RLMResults:

let realm = RLMRealm.defaultRealm()
let allItems = uncheckedItemsNoUpdate()

try! realm.transactionWithBlock({
  for itemObj in allItems {
    if let item = itemObj as? GroceryListItem {
      item.deleted = true
      item.syncStatus = SyncStatusNeedsUpdate
    }
  }
})

We should investigate if this is truly what's happening here, and if so mark this as a bug and fix this.

I was under the impression that NSFastGenerator on a collection with a custom enumerator would use the custom enumerator (where the TableView copy is done), but that wouldn't appear to be the case based on this report.