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Merge #10164

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10164: docs: fix unknown configuration setting r=lnicola a=dzvon

Currently, the correct configuration of sysroot is `rust-analyzer.cargo.noSysroot (default: false)`.

Co-authored-by: Dezhi Wu <wu543065657@163.com>
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bors[bot] 2021-09-06 11:59:21 +00:00 committed by GitHub
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@ -98,7 +98,7 @@ After I am done with the fix, I use `cargo xtask install --client` to try the ne
If I need to fix something in the `rust-analyzer` crate, I feel sad because it's on the boundary between the two processes, and working there is slow.
I usually just `cargo xtask install --server` and poke changes from my live environment.
Note that this uses `--release`, which is usually faster overall, because loading stdlib into debug version of rust-analyzer takes a lot of time.
To speed things up, sometimes I open a temporary hello-world project which has `"rust-analyzer.withSysroot": false` in `.code/settings.json`.
To speed things up, sometimes I open a temporary hello-world project which has `"rust-analyzer.cargo.noSysroot": true` in `.code/settings.json`.
This flag causes rust-analyzer to skip loading the sysroot, which greatly reduces the amount of things rust-analyzer needs to do, and makes printf's more useful.
Note that you should only use the `eprint!` family of macros for debugging: stdout is used for LSP communication, and `print!` would break it.