RustOwl toolchain setup failed (exit code 1)

[gerard-ryan-immersaview]

Bug Description

When launching the default cargo project, I get:

Environment

• OS: Windows 11 and WSL Ubuntu 24.04.2 LTS
• rustc: 1.86.0 (05f9846f8 2025-03-31)
• rustup: 1.28.2 (e4f3ad6f8 2025-04-28)
• RustOwl: 0.3.2
• Editor: VSCode WSL remote

[gerard-ryan-immersaview]

Running the following showed me the information I likely need to fix my issue, it'd be nice if it were more accessible

$HOME/.vscode-server/data/User/globalStorage/cordx56.rustowl-vscode/rustowl toolchain install

This is probably more a feature request rather than a bug at this point

[chiiydd]

Each time I launch a rust project in vscode, rustowl will download a new rustowl toolchain. Is it normal?

[cordx56]

Each time I launch a rust project in vscode, rustowl will download a new rustowl toolchain. Is it normal?

Not. Please tell me what environment you use.

[chiiydd]

Not. Please tell me what environment you use.

I just close the project, and open it again in vscode. It will setup RustOwl toolchain, and start downloading.

I try downloading the toolchain in command.

rustowl toolchain install 

But it doesn't work.

Environment

• OS: Arch Linux x86_64
• rustc 1.87.0 (17067e9ac 2025-05-09)
• rustup 1.28.2 (2025-06-02)
• RustOwl v0.3.4 (from aur rustowl-bin)
• vscode 1.100.3

[cordx56]

It seems there is a problem with the rustowl-bin repo. @MuntasirSZN Please investigate the cause of this problem after you get fine.

[MuntasirSZN]

@chiiydd Thanks for reporting. To verify, can you go to a rust project, run rustowl check, and share some logs from start? In the logs, it will say if rustowl found it, or not, or something else.

[MuntasirSZN]

Is there a folder in home directory named rustowl-runtime?

[chiiydd]

@chiiydd Thanks for reporting. To verify, can you go to a rust project, run rustowl check, and share some logs from start? In the logs, it will say if rustowl found it, or not, or something else.

@MuntasirSZN Thanks for reply. The logs are as follows.

 ~/repository/test-proj ❯ rustowl check                                                                       
2025-06-12T16:20:43.064Z INFO  [rustowl::lsp::backend] add /home/chiiydd/repository/test-proj to watch list
2025-06-12T16:20:43.065Z INFO  [rustowl::lsp::backend] wait 100ms for rust-analyzer
2025-06-12T16:20:43.166Z INFO  [rustowl::lsp::backend] stop running analysis processes
2025-06-12T16:20:43.166Z INFO  [rustowl::lsp::backend] start analysis
2025-06-12T16:20:43.229Z INFO  [rustowl::lsp::backend] clear cargo cache
2025-06-12T16:20:43.434Z INFO  [rustowl::toolchain] rustc_driver found: /home/chiiydd/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-9c23edfdcf82221e.so
2025-06-12T16:20:43.435Z INFO  [rustowl::toolchain] select sysroot dir from rustup installed: /home/chiiydd/.rustup/toolchains/stable-x86_64-unknown-linux-gnu
2025-06-12T16:20:43.435Z INFO  [rustowl::lsp::backend] using default cargo
2025-06-12T16:20:43.435Z INFO  [rustowl::toolchain] rustowlc is selected in the same directory as rustowl executable
2025-06-12T16:20:43.567Z INFO  [rustowl::toolchain] rustc_driver found: /home/chiiydd/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/librustc_driver-9c23edfdcf82221e.so
2025-06-12T16:20:43.567Z INFO  [rustowl::lsp::backend] start checking /home/chiiydd/repository/test-proj
    Checking test-proj v0.1.0 (/home/chiiydd/repository/test-proj)
2025-06-12T16:20:43.642Z INFO  [rustowlc::core] start borrowck of DefId(0:3 ~ test_proj[0218]::main)
2025-06-12T16:20:43.642Z INFO  [rustowlc::core] start borrowck of DefId(0:3 ~ test_proj[92df]::main)
2025-06-12T16:20:43.642Z INFO  [rustowlc::core::analyze] facts of DefId(0:3 ~ test_proj[92df]::main) prepared; start analyze of DefId(0:3 ~ test_proj[92df]::main)
2025-06-12T16:20:43.642Z INFO  [rustowlc::core::analyze] facts of DefId(0:3 ~ test_proj[0218]::main) prepared; start analyze of DefId(0:3 ~ test_proj[0218]::main)
2025-06-12T16:20:43.644Z INFO  [rustowlc::core] borrow checked: 1 / 1
2025-06-12T16:20:43.644Z INFO  [rustowlc::core::analyze] start re-computing borrow check with dump: true
2025-06-12T16:20:43.644Z INFO  [rustowlc::core::analyze] borrow check finished
2025-06-12T16:20:43.644Z INFO  [rustowlc::core] borrow checked: 1 / 2
2025-06-12T16:20:43.644Z INFO  [rustowlc::core::analyze] start re-computing borrow check with dump: true
2025-06-12T16:20:43.644Z INFO  [rustowlc::core] start borrowck of DefId(0:4 ~ test_proj[92df]::main#1)
2025-06-12T16:20:43.644Z INFO  [rustowlc::core::analyze] borrow check finished
2025-06-12T16:20:43.646Z INFO  [rustowlc::core::analyze] facts of DefId(0:4 ~ test_proj[92df]::main#1) prepared; start analyze of DefId(0:4 ~ test_proj[92df]::main#1)
2025-06-12T16:20:43.646Z INFO  [rustowlc::core] borrow checked: 2 / 2
2025-06-12T16:20:43.646Z INFO  [rustowlc::core::analyze] start re-computing borrow check with dump: true
2025-06-12T16:20:43.646Z INFO  [rustowlc::core::analyze] borrow check finished
2025-06-12T16:20:43.650Z INFO  [rustowlc::core] analyzed one item of /home/chiiydd/repository/test-proj/src/main.rs
2025-06-12T16:20:43.650Z INFO  [rustowlc::core] analyzed one item of /home/chiiydd/repository/test-proj/src/main.rs
2025-06-12T16:20:43.650Z INFO  [rustowlc::core] analyzed one item of /home/chiiydd/repository/test-proj/src/main.rs
2025-06-12T16:20:43.655Z INFO  [rustowl::lsp::backend] 1 crates checked                                                                       
2025-06-12T16:20:43.656Z INFO  [rustowl::lsp::backend] 2 crates checked    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s

2025-06-12T16:20:43.658Z INFO  [rustowl::lsp::backend] check finished
2025-06-12T16:20:43.658Z INFO  [rustowl] Successfully analyzed

Is there a folder in home directory named rustowl-runtime?

No, the directory rustowl-runtime is located in /usr/bin. I changed the permissions of the /usr/bin/rustowl-runtime directory to allow the toolchain to install properly.

Perhaps the problem is that RUSTOWL_RUNTIME_DIRS is not set. I didn't find any environment variables related to rustowl.

[cordx56]

@chiiydd I suspect that the rustowl command version does not correspond to the VS Code extension version. Can you tell me about each of the two versions?

[chiiydd]

@chiiydd I suspect that the rustowl command version does not correspond to the VS Code extension version.

@cordx56 I tried both the version from the extension marketplace and the one built from source . The issue persists in both cases.

Below is the version I installed from the extension marketplace.

VS Code Extension version

• Identifier: cordx56.rustowl-vscode
• Version : 0.3.4
• Last Updated : 2025-06-13, 10:47:49
• Size : 465.83KB

RustOwl: v0.3.4

[cordx56]

@chiiydd can you share the result of running rustowl --version -q?

[chiiydd]

@cordx56 The version is exactly v0.3.4 .

 ~ ❯ rustowl --version -q                                                                                                      
v0.3.4
~ ❯ rustowl --version                                                                                                         
RustOwl v0.3.4

[github-actions[bot]]

🤖 Bot: Issue has not seen activity in 30 days and will therefore be marked as stale. It will be closed in 7 days if no further response is found.

[gerard-ryan-immersaview]

bump

[Mauladen]

I have the same problem, I installed rustowl-bin and when I start VS Code I get this error

UPDATE:

I managed to solve the problem, I tried running the rustowl toolchain install command and got an error

2025-07-26T09:31:28.313Z INFO  [rustowl::toolchain]  99% received
2025-07-26T09:31:28.400Z INFO  [rustowl::toolchain] 100% received
2025-07-26T09:31:28.400Z INFO  [rustowl::toolchain] download finished
2025-07-26T09:31:28.400Z ERROR [rustowl::toolchain] failed to create toolchain directory

I thought that there were problems with the rights, so I ran this command with sudo and after that everything was installed correctly, I started VSCode and everything works!

@gerard-ryan-immersaview maybe you should try my solution?

[mikeggh]

I am on newest VS Code, and had it fail multiple times at 98% from the command line: $HOME/.vscode-server/data/User/globalStorage/cordx56.rustowl-vscode/rustowl toolchain install I am behind a proxy though.. but I just saw the filename and used: wget https://github.com/cordx56/rustowl/releases/download/v0.3.4/rustowl-x86_64-unknown-linux-gnu.tar.gz. I unzipped into the directory from the command line, and it works fine..

It MAY have something to do with your HTTP client code? I am not positive.. just giving information about my experience..

[MuntasirSZN]

Hi @mikeggh, it happens because we had default-features = false and this disabled system-proxy in reqwest, this gets a fix in #352. Also enabled socks if anyone uses it....

[gerard-ryan-immersaview]

For me, this Issue was about the quality of the error code, not the specific error. Providing some kind of detailed error in the UI would be my preference, but a link to a log file would also work.

Otherwise, this issue will be about every possible error that may occur.

[github-actions[bot]]

🤖 Bot: Issue has not seen activity in 30 days and will therefore be marked as stale. It will be closed in 7 days if no further response is found.

[stokesaidan420-arch]

Use cargo-binstall instead