I've updated dev-lang/rust-bin to 1.4.0 released few weeks ago: http://blog.rust-lang.org/2015/10/29/Rust-1.4.html I have changed the ebuild to be able to install cargo and the rust documentation. Those are enabled by the "cargo" and "doc" USE flags. I've tested the ebuild on 2 of my computers on x86_64. The ebuild can be found in my overlay at https://github.com/billiob/gentoo-overlay/tree/master/dev-lang/rust-bin . Reproducible: Always This ticket is a bit related to #565772 and #565774.
I have updated my ebuild to 1.5.0 with few changes and it works fine.
Version bumped, synced with https://github.com/gentoo/gentoo-rust.