2020-04-11

rustup override set nightly
rustup update
rustup default nightly

tide ) cargo install cargo-edit                                                                     (base) 21:19:03
    Updating `git://mirrors.ustc.edu.cn/crates.io-index` index
  Downloaded cargo-edit v0.6.0 (registry `git://mirrors.ustc.edu.cn/crates.io-index`)
  Downloaded 1 crate (55.3 KB) in 13.74s
  Installing cargo-edit v0.6.0
  Downloaded ascii v0.9.3 (registry `git://mirrors.ustc.edu.cn/crates.io-index`)
  Downloaded futures-util v0.3.4 (registry `git://mirrors.ustc.edu.cn/crates.io-index`)
 Downloading 46 crates, remaining bytes: 15.6 KB   
...