Unable to find definition for hashbrown

[fishincat]

I have describe this at stackoverflow: https://stackoverflow.com/questions/78754358/vscode-rust-analyzer-can-not-find-definition-of-hashbrown

here is my code:

main.rs

use std::collections::HashMap;

fn main() {
    let _ = HashMap::<i32, i32>::new();
    println!("Hello, world!")
}

Cargo.toml

[package]
name = "world_hello"
version = "0.1.0"
edition = "2021"

[dependencies]

rust-analyzer version is: v0.3.2037 (actually no version works)

rust version

Default host: x86_64-apple-darwin
rustup home:  /Users/fishincat/.rustup

installed toolchains
--------------------

stable-x86_64-apple-darwin (default)
nightly-2023-12-28-x86_64-apple-darwin
nightly-2024-01-26-x86_64-apple-darwin
nightly-x86_64-apple-darwin

active toolchain
----------------

stable-x86_64-apple-darwin (default)
rustc 1.77.2 (25ef9e3d8 2024-04-09)

rustup component list --installed

cargo-x86_64-apple-darwin
clippy-x86_64-apple-darwin
rust-docs-x86_64-apple-darwin
rust-src
rust-std-x86_64-apple-darwin
rustc-x86_64-apple-darwin
rustfmt-x86_64-apple-darwin

my problem is:

When I jump to the definition of HashMap:

...
use hashbrown::hash_map as base;
...

pub struct HashMap<K, V, S = RandomState> {
    base: base::HashMap<K, V, S>,
}

I can not go deep to the definition of base(hashbrown), it shows:

No Definition found for hashbrown

how to solve this?

[fishincat]

[Veykril]

You will have to enable the "rust-analyzer.cargo.sysrootQueryMetadata": true, config for this to work, but note that this means r-a will create and delete a lockfile in your toolchain's sysroot when you start a rust-analyze session. This is due to shortcoming in cargo

[fishincat]

@Veykril I don't know why "rust-analyzer.cargo.sysrootQueryMetadata" doesn't work any more.

[fishincat]

Rustc toolchain was updated to 1.80.1. It's this the problem?

[lnicola]

See #17795. I think it will start working again in 1.82.

[Veykril]

Sorry I was a bit eager with dropping that flag 😅 Any toolchain version 1.82 and beyond will work (so you could use the current beta now as well I think, or in a week)

[fishincat]

Sorry I was a bit eager with dropping that flag 😅 Any toolchain version 1.82 and beyond will work (so you could use the current beta now as well I think, or in a week)

Solved my problem, thx very much!

[lnicola]

@fishincat wait, so does it work in 1.83.0-nightly (bd53aa3bf 2024-09-02)?

[fishincat]

@fishincat wait, so does it work in 1.83.0-nightly (bd53aa3bf 2024-09-02)?

YES

[fishincat]

@lnicola
It works very well on Mac OS. But I faced a problem on Linux when I use vscode connected to it(Linux remote machine) remotely.

The setting.json is:

{
    "[rust]": {
        "editor.defaultFormatter": "rust-lang.rust-analyzer",
        "editor.formatOnSave": true
    },
    //"rust-analyzer.cargo.target": "x86_64-unknown-linux-gnu",
    "rust-analyzer.cargo.buildScripts.overrideCommand": null,
    "rust-analyzer.debug.engineSettings": {
    },
    "rust-analyzer.check.overrideCommand": null,
    "rust-analyzer.server.extraEnv": null,
    //"rust-analyzer.cargo.sysroot": "discover",
    "rust-analyzer.cargo.sysroot": "/data00/home/my_name/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu",
}

The error is:

Workspace `/data00/home/my_name/code/my_project/Cargo.toml` has sysroot errors: can't find standard library sources in /data00/home/my_name/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu

How should I do?

[lnicola]

We actually try to run rustup component add rust-src, I don't know why it doesn't work.

[Veykril]

We actually try to run rustup component add rust-src, I don't know why it doesn't work.

We don't run that for explicit sysroot paths, only when set to discover

[fishincat]

We actually try to run rustup component add rust-src, I don't know why it doesn't work.

We don't run that for explicit sysroot paths, only when set to discover

So is there any way to fix this?

[lnicola]

Remove rust-analyzer.cargo.sysroot from your settings or run rustup +nightly component add rust-src.

[fishincat]

Remove rust-analyzer.cargo.sysroot from your settings or run rustup +nightly component add rust-src.

Yes, It works.
You guys are really magician!