rustc版本查看
rustc --version --verbose
输出
rustc 1.45.0-nightly (a74d1862d 2020-05-14) binary: rustc commit-hash: a74d1862d4d87a56244958416fd05976c58ca1a8 commit-date: 2020-05-14 host: x86_64-unknown-linux-gnu release: 1.45.0-nightly LLVM version: 9.0