Rustup to rustc 1.31.0-nightly (d586d5d2f 2018-10-29)
Rustup to rustc 1.31.0-nightly (d586d5d2f 2018-10-29)

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust