Rust-analyzer in VScode encounters problem when starting server

[Do7and]

I want to use rust-analyzer in vscode so I install the extension by vscode, but when I start to use it, it throws error :[ERROR project_model::rustc_cfg] failed to get rustc cfgs e=系统找不到指定的文件。 (os error 2). And maybe due to this error, I cannot find the "RUN doc-test" button where I write the doc test which can be detected by "cargo doc --open" command.

I take other's example as referrence, but in my rust-analyzer it doesn't work.

rust-analyzer version:v0.3.1730
rustc version: 1.74.0

relevant settings: NO rust-analyzer*-like setting in setting.json

[Veykril]

系统找不到指定的文件 = The system can not find the file specified

How did you install rust? It seems rust-analyzer is unable to run rustc --print cfg as rustc does not resolve to a command for it

[Do7and]

系统找不到指定的文件 = The system can not find the file specified

How did you install rust? It seems rust-analyzer is unable to run rustc --print cfg as rustc does not resolve to a command for it

I have surely installed rust.
I installed it through https://www.rust-lang.org/learn/get-started using its rustup-init.exe.
And I run rustc --print cfg in the same directory with my code above, it seems no problem.

And in my env path there exists cargo bin directory which contains rustc.exe and so on

I do not know how this rustc_cfg work in this extension, because when I use Everything to search rust_cfg on my local there shows no result.

[0xd34db100d]

Got the same error too on server extension startup and also got installed rust in path:

[AndersHogqvist]

I just installed Rust as well as rust-analyzer and have the same issue. I can run rustc --print cfg in the terminal but rust-analyzer seems to live in its own environment where it can't find rustc.

[lnicola]

@AndersHogqvist if you're on Linux or MacOS, see this part of the manual:

and #1811.

[AndersHogqvist]

I'm on Windows. In PowerShell:

C:\playground > rustc --print sysroot
C:\Users\SEANHOG1\.rustup\toolchains\stable-x86_64-pc-windows-msvc

Tried specifying the path in settings.json with / instead of \\ but that didn't help either:

"rust-analyzer.cargo.sysroot": "C:/Users/SEANHOG1/.rustup/toolchains/stable-x86_64-pc-windows-msvc"

[ERROR project_model::rustc_cfg] failed to get rustc cfgs e=failed to discover rustc in sysroot: "C:\\Users\\SEANHOG1\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc"

[AndersHogqvist]

Oh, rustup component add rust-src and restarting rust-analyzer solved it! :-)

[lnicola]

I wanted to suggest that, but I'm looking at

rust-analyzer/crates/project-model/src/sysroot.rs

Line 163 in 980d348

let rustc = self.root.join("bin/rustc");

and wondering how it can work on Windows.

[Veykril]

It can't, that's a bug

[ShadowDrakken]

Same issue occurring here...
ERROR project_model::rustc_cfg: failed to get rustc cfgs e=failed to discover rustc in sysroot: "<redacted>\\Rust\\rustup\\toolchains\\stable-x86_64-pc-windows-msvc"

Caused by:
The system cannot find the file specified. (os error 2)

PS> rustc --version
rustc 1.76.0 (07dca489a 2024-02-04)

PS> rustup component add rust-src
info: component 'rust-src' is up to date

PS>dir (rustc --print sysroot)
Directory: <redacted>\Rust\rustup\toolchains\stable-x86_64-pc-windows-msvc

Mode LastWriteTime Length Name

---

d----- 2/10/2024 2:57 PM bin
d----- 2/10/2024 2:57 PM etc
d----- 2/10/2024 2:57 PM lib
d----- 2/10/2024 2:57 PM libexec
d----- 2/10/2024 2:58 PM share