RLS fails to start in multi-project setup on non-OS drive

The VS Code error message: Could not spawn RLS: `spawn C:\WINDOWS\system32\cmd.exe ENOENT`

Setting "rust-client.enableMultiProjectSetup" to false in settings.json prevents the issue.

Only occurs when running in a workspace folder on a different disk drive than the Windows OS drive.
In my case, Windows is installed to C:, and I'm attempting to work in D:\projects\foo.

Example directory structure:

• D:\projects\foo
  • bar\
    • src\
      • main.rs
    • Cargo.toml
  • baz\
    • src\
      • main.rs
    • Cargo.toml

https://github.com/rust-lang/rls-vscode/blob/c85bf69f3a00184ee4600da34e6387178eba754c/src/extension.ts#L454
I noticed cwd here is set to "\projects\foo", without the drive letter.

settings.json:

"rust-client.enableMultiProjectSetup": true
"rust-client.channel": "stable"

PS D:\projects\foo> rustup -V
rustup 1.20.2 (13979c968 2019-10-16)

PS D:\projects\foo> rustup show
Default host: x86_64-pc-windows-msvc
rustup home:  C:\Users\...\.rustup

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

stable-x86_64-pc-windows-msvc
nightly-x86_64-pc-windows-msvc

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

stable-x86_64-pc-windows-msvc (default)
rustc 1.39.0 (4560ea788 2019-11-04)

PS D:\projects\foo> code -v
1.40.2
f359dd69833dd8800b54d458f6d37ab7c78df520
x64

PS D:\projects\foo> code --list-extensions --show-versions | rg rust
rust-lang.rust@0.7.0

[ppisecky]

I am having the exact same issue

Same situation, same issue

[mihai-dinculescu]

Is there any update on this?