Rust-analyzer language server exited.

[moqsien]

Summary

I have Cargo 1.85 installed on my iMac.
And rust-analyzer exited when I try to open helix source code with hx.

As I just noticed that the rust-version from Cargo.toml in helix source code is 1.76, is this the reason why helix failed to start rust-analyzer?

It's unreasonable that a higher version can not satisfy a low version requirement.

Reproduction Steps

1. Have a higher version of Cargo/Rust installed.
2. Open a rust project limited to a lower version.

Helix log

2025-03-03T20:28:54.532 helix_lsp::transport [ERROR] rust-analyzer err <- "error: Unknown binary 'rust-analyzer' in official toolchain '1.76.0-x86_64-apple-darwin'.\n"
2025-03-03T20:28:54.534 helix_lsp [ERROR] failed to initialize language server: server closed the stream
2025-03-03T20:28:54.534 helix_lsp::transport [ERROR] rust-analyzer err: <- StreamClosed

Platform

macOS

Terminal Emulator

iterm2 3.5.11

Installation Method

brew

Helix Version

25.01.1

[arpangreat]

Cargo installs specific rust devtools per toolchain e.g. rustfmt, rust-analyzer etc. in your system cargo couldn't find rust-analyzer for that toolchain version , so just install it with cargo install.

[moqsien]

I just tried rustup install 1.76.0 on my Linux machine, and problems solved then.
Thx.

[taylorplewe]

Worked for me too. Thanks 🙏