I'm really impressed by the attentiveness of the Swift compiler team. Found this in the repo: https://github.com/apple/swift/commit/666646fee95bc75ca81e1d...

One tweet and the bug is fixed within a couple of hours. Wow!

Found that issue while working on the Pythonic.swift project: https://github.com/practicalswift/Pythonic.swift (btw, contributors welcome! Know Python? If so, a very good way to jump into Swift programming is by contributing to Pythonic.swift: a Swift implementation of selected parts of Python standard library)