Please let us know if you run into any issues! Pending any detected regressions these are likely to be the exact artifacts that we’ll release on Thursday.
Thanks for testing! The dates here are the commit dates, and that commit was indeed on 2017-05-16. That commit is the tip of the 1.18.0 branch. Rust itself receives many more backports than Cargo, and the way we do a Rust release means there’s a commit near the release date as well.