The @swift-4.2 manifest is gone on master altogether, so I suspect the real mistake was not so much that the manifest fell behind, but that it wasn’t deleted when Swift 4.2 was no longer supported.
The @swift-4.2 manifest is gone on master altogether, so I suspect the real mistake was not so much that the manifest fell behind, but that it wasn’t deleted when Swift 4.2 was no longer supported.