Technically, the constraints don't break but they stop working as intended. I have forked PureLayout's iOS 8 AutoLayout example to replicate this issue. In a nutshell, I have a UITableView with a custom cell that looks like this:
After adding
self.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator
it looks like this:
Notice the gap between the title and the body of the cell.