Hmbown/CodeWhale · error

lane proxy stderr logger panicked

Error message

lane proxy stderr logger panicked

What it means

Error "lane proxy stderr logger panicked" thrown in Hmbown/CodeWhale.

Source

Thrown at crates/lane/src/runtime.rs:506

    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"))?;
    let stderr_result = stderr_thread
        .join()
        .map_err(|_| anyhow::anyhow!("lane proxy stderr logger panicked"))?;
    let mut exit_code = exit_status_code(status);
    if let Some(error) = stdout_result.err().or_else(|| stderr_result.err()) {
        append_proxy_failure(&log_path, &lane_id, &error)?;
        exit_code = LANE_PROXY_FAILURE_EXIT_CODE;
    }
    write_lane_exit_receipt(&receipt_path, &receipt_tmp_path, &lane_id, exit_code)?;
    Ok(exit_code)
}

fn read_lane_exit_receipt(log_path: &Path, lane_id: &str) -> Result<Option<LaneExitReceipt>> {
    let path = lane_exit_receipt_path(log_path);
    let metadata = match std::fs::metadata(&path) {
        Ok(metadata) => metadata,
        Err(err) if err.kind() == std::io::ErrorKind::NotFound => return Ok(None),
        Err(err) => return Err(err).with_context(|| format!("stat {}", path.display())),
    };
    if metadata.len() > MAX_EXIT_RECEIPT_BYTES {
        bail!(

View on GitHub (pinned to 8880682c63)

When it happens

Trigger: Thrown at crates/lane/src/runtime.rs:506 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/9ee3ad9d777b83cf. Report an issue: GitHub.