最近把原来的老版本rust升级为最新版本， 转悠了半天给我报一个 目录不存在异常而升级失败。

异常信息：

info: rolling back changes

error: failure removing component 'rust-docs-x86_64-apple-darwin', directory does not exist: 'share/doc/rust/html'

  stable-x86_64-apple-darwin update failed - rustc 1.70.0 (90c541806 2023-05-31)

解决方法：

mac系统下rust的安装路径在 ~/.rustup/toolchains/stable-x86_64-apple-darwin ,  进入这个目录然后手动创建提示不存在的这个目录 share/doc/rust/html ， 然后在重新执行 rustup update 即可

网上其他的解决方法： 重新安装rustc， 命令如下：

# 重新安装rustc
rustup component remove rustcrustup component add rustc# 重新执行rust更新
rustup update

Rust升级和验证

➜  rustup update
info: syncing channel updates for 'stable-x86_64-apple-darwin'
714.8 KiB / 714.8 KiB (100 %)  19.2 KiB/s in 50s ETA:  0s
info: latest update on 2024-03-28, rust version 1.77.1 (7cf61ebde 2024-03-27)
info: downloading component 'rustc'54.8 MiB /  54.8 MiB (100 %)  38.4 KiB/s in 31m 29s ETA:  0s     
info: downloading component 'rust-src'2.5 MiB /   2.5 MiB (100 %)  51.2 KiB/s in  1m 25s ETA:  0s
info: downloading component 'cargo'7.0 MiB /   7.0 MiB (100 %)  22.4 KiB/s in  9m 47s ETA:  0s     
info: downloading component 'clippy'2.2 MiB /   2.2 MiB (100 %)  57.6 KiB/s in  1m 38s ETA:  0s
info: downloading component 'rust-docs'14.9 MiB /  14.9 MiB (100 %)  20.2 KiB/s in 16m 40s ETA:  0s    
info: downloading component 'rust-std'23.6 MiB /  23.6 MiB (100 %)  25.6 KiB/s in 35m 32s ETA:  0s    
info: downloading component 'rustfmt'1.8 MiB /   1.8 MiB (100 %)  16.0 KiB/s in  3m 13s ETA:  0s    
info: removing previous version of component 'rustc'
info: removing previous version of component 'rust-src'
info: removing previous version of component 'cargo'
info: removing previous version of component 'clippy'
info: removing previous version of component 'rust-docs'
info: removing previous version of component 'rust-std'
info: removing previous version of component 'rustfmt'
info: installing component 'rustc'54.8 MiB /  54.8 MiB (100 %)  10.2 MiB/s in  6s ETA:  0s
info: installing component 'rust-src'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'14.9 MiB /  14.9 MiB (100 %)   3.0 MiB/s in  4s ETA:  0s
info: installing component 'rust-std'23.6 MiB /  23.6 MiB (100 %)  10.0 MiB/s in  2s ETA:  0s
info: installing component 'rustfmt'stable-x86_64-apple-darwin updated - rustc 1.77.1 (7cf61ebde 2024-03-27) (from rustc 1.70.0 (90c541806 2023-05-31))info: cleaning up downloads & tmp directories
info: self-update is disabled for this build of rustup
info: any updates to rustup will need to be fetched with your system package manager
➜  rustup show
Default host: x86_64-apple-darwin
rustup home:  ~/.rustupstable-x86_64-apple-darwin (default)
rustc 1.77.1 (7cf61ebde 2024-03-27)