Rust 1.15 is released on Thursday. Builds are available now in the archives for testing.
URL is https://static.rust-lang.org/dist/2017-01-31/index.html
Test rustup with
rustup update stable-2017-01-31
@cuviper This build does not include fixes to rust-buildbot you made for powerpc and s390x. I only discovered last night we had not deployed those fixes, and felt it was too risky to touch. I'm sorry about that, but will deploy the buildbot changes for the 1.16 beta today.