Hmbown/CodeWhale · error

lane child stderr was not piped

Error message

lane child stderr was not piped

What it means

Error "lane child stderr was not piped" thrown in Hmbown/CodeWhale.

Source

Thrown at crates/lane/src/runtime.rs:485

    child_command.args(&command[1..]);
    child_command.envs(environment);
    child_command.stdout(Stdio::piped()).stderr(Stdio::piped());
    let mut child = match child_command.spawn() {
        Ok(child) => child,
        Err(error) => {
            return fail(
                anyhow::Error::from(error).context(format!("spawn lane child command {command:?}")),
                127,
            );
        }
    };
    let stdout = match child.stdout.take() {
        Some(stdout) => stdout,
        None => return fail(anyhow::anyhow!("lane child stdout was not piped"), 125),
    };
    let stderr = match child.stderr.take() {
        Some(stderr) => stderr,
        None => return fail(anyhow::anyhow!("lane child stderr was not piped"), 125),
    };
    let stdout_log = log_path.clone();
    let stderr_log = log_path.clone();
    let stdout_thread = thread::spawn(move || stream_child_output(stdout, stdout_log, "stdout"));
    let stderr_thread = thread::spawn(move || stream_child_output(stderr, stderr_log, "stderr"));

    let status = match child.wait() {
        Ok(status) => status,
        Err(error) => {
            return fail(
                anyhow::Error::from(error).context(format!("wait for lane child {command:?}")),
                LANE_PROXY_FAILURE_EXIT_CODE,
            );
        }
    };
    let stdout_result = stdout_thread
        .join()
        .map_err(|_| anyhow::anyhow!("lane proxy stdout logger panicked"))?;

View on GitHub (pinned to 8880682c63)

When it happens

Trigger: Thrown at crates/lane/src/runtime.rs:485 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@8880682c63 (2026-08-16). Data as JSON: /api/errors/7962137ed6aec587. Report an issue: GitHub.