@yxckjhasdkjh posted a new topic, subject "Swift 4.2.1". It read:

   My mac wants me to upgrade to Xcode 10.1, which will include Swift 4.2.1.  
    However, I can't find any mention of that swift version either on the download page or in the changelog.
    
    My worry is that I (or any of my team members) update to Swift 4.2.1, write some code that passes locally and then try to push it onto CI where it will fail because 4.2.1 might include some bugfix or new functionality that isn't present on version 4.2—or even worse, there will be subtle behavioural differences between the local version and the one deployed on the server.
    
    Would it be possible to update the changelog and add the Swift 4.2.1 release (also for Ubuntu) to the downloads page?

@SDGGiesbrecht (Jeremy David Giesbrecht) replied

    It also caused minor confusion for me earlier today.
    
    Oddly enough, you can successfully download it by manually entering a 4.2.1 download URL according to the pattern established by the links for other versions. There is just no entry on the page itself. For this reason, I suspect `swiftenv` and similar tools can already access 4.2.1 too (though I don't have my Linux machine with me right now to try).

Then @SDGGiesbrecht (Jeremy David Giesbrecht) said

    Here are the links for now:
    
    Ubuntu 18.04  
    https://swift.org/builds/swift-4.2.1-release/ubuntu1804/swift-4.2.1-RELEASE/swift-4.2.1-RELEASE-ubuntu18.04.tar.gz
    
    Ubuntu 16.04  
    https://swift.org/builds/swift-4.2.1-release/ubuntu1604/swift-4.2.1-RELEASE/swift-4.2.1-RELEASE-ubuntu16.04.tar.gz
    
    Ubuntu 14.04  
    https://swift.org/builds/swift-4.2.1-release/ubuntu1404/swift-4.2.1-RELEASE/swift-4.2.1-RELEASE-ubuntu14.04.tar.gz

After which, @SDGGiesbrecht (Jeremy David Giesbrecht) added

    The downloads joshua31@example.net is now up to date too.

So @benrimmington (Ben Rimmington) replied

    There are known and resolved issues (for the Swift Compiler and Standard Library) in the Xcode 10.1 Release Notes.

After which, @krilnon (Kyle Murray) added

    The Xcode 10.1 release notes describe the most pertinent Swift changes.
    
    Edit:  Nice timing @benrimmington.

Then @adtrevor said

    Do we know, in terms of commits, what is included in this release?


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