Q1: error-component-rls-is-unavailable-for-download-nightly

[yangwenmai]

VSCode 在打开 rs 文件后提示安装 rust-analysis 等，但是报错了

error: toolchain 'nightly-x86_64-apple-darwin' does not contain component 'rls' for target 'x86_64-apple-darwin'

解决办法：

https://github.com/rust-lang/rls#error-component-rls-is-unavailable-for-download-nightly

最终解决办法：rust-lang/rls#641 (comment)

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For those who made it here looking for a workaround, the most recent toolchain I found which still has rls-preview is nightly-2019-04-19.

$ rustup toolchain install nightly-2019-04-21-x86_64-apple-darwin
$ rustup component add rls-preview --toolchain nightly-2019-04-21-x86_64-apple-darwin

Then in your VSCode user settings:

  "rust-client.channel": "nightly-2019-04-21-x86_64-apple-darwin"