Crashes every time in a specific project (VSCode)

[Dzejkop]

Every single time rust-analyzer starts for this project it displays the notification

The Rust Analyzer Language Server server crashed 5 times in the last 3 minutes. The server will not be restarted.

and in the logs there appear a bunch of entries like this one:

thread 'main' panicked at 'expected absolute path, got ', crates/paths/src/lib.rs:63:36
stack backtrace:
   0: <unknown>
   1: core::fmt::write
   2: <unknown>
   3: <unknown>
   4: <unknown>
   5: std::panicking::rust_panic_with_hook
   6: rust_begin_unwind
   7: std::panicking::begin_panic_fmt
   8: <unknown>
   9: paths::AbsPathBuf::assert
  10: ra_project_model::cargo_workspace::CargoWorkspace::from_cargo_metadata
  11: ra_project_model::ProjectWorkspace::load
  12: <unknown>
  13: <unknown>
  14: rust_analyzer::main_loop::main_loop
  15: <unknown>
  16: <unknown>
  17: std::rt::lang_start_internal
  18: <unknown>
  19: __libc_start_main
  20: <unknown>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
[Error - 4:56:35 PM] Connection to server got closed. Server will not be restarted.

Funny enough thisonly seems to affect one specific project.

[lnicola]

Do you have any path dependencies in Cargo.toml?

[Dzejkop]

Yes

[lnicola]

Crashes around https://github.com/rust-analyzer/rust-analyzer/blob/master/crates/ra_project_model/src/cargo_workspace.rs#L248 with the assertion that the workspace has an absolute path.

[matklad]

Would be useful to get output of cargo metadata command

[Dzejkop]

I can't really give you the cargo metadata there's some work related stuff there 😦

Any specific entries I could provide?

[lnicola]

workspace_root would be interesting. It's at the end.

[Dzejkop]

    "target_directory": "/home/user_name/Projects/abcd3/abcd3/target",
    "version": 1,
    "workspace_root": "/home/user_name/Projects/abcd3/abcd3"
}

[matklad]

Hm, not sure what’s going on here.... Do you have out_dir or proc macro support enabled in the settings?

[Dzejkop]

Ok, I fiddled with user settings I had this entry for some reason

"rust-analyzer.cargo.loadOutDirsFromCheck": true,

after removing, everything works fine

[matklad]

@Dzejkop could you run cargo check --message-format=json and check the value of out_dir from "build script executed" messages? It seems like there might be some bug in cargo?

[matklad]

Ah, I guess, you might be using rust older than 1.41,and that causes cargo metadata to use default path here.

[Dzejkop]

Yup, I'm using Rust 1.40, thanks for looking into this