# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2017-04-21 15:07:21 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/855437809087328256) Raised a Swift bug. Switch being incorrectly identified as non-exhaustive when using _ pattern in tuples. https://t.co/cefV2rOHZ1