in order to perform benchmarks, I want to upgrade to rust nightly.
I tried this with rustup:
I'm going to ask you the value of each these installation options. You may simply press the Enter key to leave unchanged. Default host triple? Default toolchain? (stable/beta/nightly) nightly Modify PATH variable? (y/n) y Current installation options: default host triple: x86_64-unknown-linux-gnu default toolchain: nightly modify PATH variable: yes 1) Proceed with installation (default) 2) Customize installation 3) Cancel installation 1 info: updating existing rustup installation Rust is installed now. Great! To get started you need Cargo's bin directory in your PATH environment variable. Next time you log in this will be done automatically. To configure your current shell run source $HOME/.cargo/env.
I ran the source command in my shell session, but cargo still complains:
error: use of unstable library feature 'test' (see issue #27812)