Rust 指定版本安装
安装nightly-2022-12-15版本
rustup install nightly-2022-12-15
查看安装好的版本列表
rustup toolchain list
stable-x86_64-apple-darwin
nightly-2022-12-15-x86_64-apple-darwin (default)
nightly-2023-03-09-x86_64-apple-darwin
nightly-x86_64-apple-darwin
1.68.0-x86_64-apple-darwin
设置 nightly-2022-12-15-x86_64-apple-darwin 为当前激活版本
rustup default nightly-2022-12-15-x86_64-apple-darwin