RLS crashed: Connection to server got closed. Server will restart.

[XiangQingW]

Version of VSCode: 1.17.1
Version of the extension: 0.3.1
OS: macOS

Description:

RLS crashed when I go to definition, error as follow:

thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: CargoError(Msg("manifest path `/Users/xx/repos/lark/rust-sdk/Cargo.toml` is a virtual manifest, but this command requires running against an actual package in this workspace"), State { next_error: None, backtrace: None })', src/libcore/result.rs:906:4
note: Run with `RUST_BACKTRACE=1` for a backtrace.
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "PoisonError { inner: .. }"', src/libcore/result.rs:906:4
[Info  - 20:18:33] Connection to server got closed. Server will restart.

Output of the "Rust logging" channel:

<place here>