Hi Erica, thanks for the reply. In keeping my original post short, I neglected to mention that the way I ran into this is that I opened a project that worked fine with XCode 6.3.2 but that did not compile with XCode 7. So for me, this did not happen with pre-2, or at least not with the current released version of XCode.Paste the following into a new iOS Playground in both XCode 6.3.2 and 7. It works in the former but not in the latter.import UIKit var errors = [(Int, String)]() errors.append((400, Bad Request))Would like to hear from someone from Apple if this is a bug or a language change.