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The default rust toolchain on the machine is already set to nightly. But rust-analyzer complains about unstable features in vscode.

"#![feature] may not be used on the stable release channel"

It seems that rust-analyzer in vscode doesn't honor the toolchain setting on the machine. Is there a way to switch rust-analyzer from stable to nightly in vscode?

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1 Answer 1

Reset to default
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If your toolchain (and rust-analyzer with it) is managed by rustup you can simply put a toolchain-file in your project directory (next to Cargo.toml) or use any other toolchain override

rust-toolchain.toml:

[toolchain]
channel = "nightly"

You then need to restart any running rust-analyzer instances (for example by reloading VSCode) for it to take effect.

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