openai/codex · error · anyhow::Error

DuplicateHandle failed for runner {pipe_label_for_thread} co

Error message

DuplicateHandle failed for runner {pipe_label_for_thread} connect thread: {}

What it means

Error "DuplicateHandle failed for runner {pipe_label_for_thread} connect thread: {}" thrown in openai/codex.

Source

Thrown at codex-rs/windows-sandbox-rs/src/elevated/runner_client.rs:225

    let mut connect_thread = Some(
        thread::Builder::new()
            .name(format!("codex-runner-connect-{pipe_label}"))
            .spawn(move || {
                let current_process = unsafe { GetCurrentProcess() };
                let mut thread_handle = 0;
                let duplicate_ok = unsafe {
                    DuplicateHandle(
                        current_process,
                        GetCurrentThread(),
                        current_process,
                        &mut thread_handle,
                        0,
                        0,
                        DUPLICATE_SAME_ACCESS,
                    )
                };
                if duplicate_ok == 0 {
                    let _ = thread_handle_tx.send(Err(anyhow::anyhow!(
                        "DuplicateHandle failed for runner {pipe_label_for_thread} connect thread: {}",
                        unsafe { GetLastError() }
                    )));
                    return;
                }

                // Publish the helper thread HANDLE before the blocking pipe connect so the
                // parent can cancel this specific operation if it times out.
                let _ = thread_handle_tx.send(Ok(thread_handle));

                let result = connect_pipe(h_pipe, expected_runner_pid)
                    .map_err(anyhow::Error::from)
                    .context(format!("connect {pipe_label_for_thread}"));
                let _ = connect_result_tx.send(result);
            })?,
    );
    let thread_handle = thread_handle_rx.recv().map_err(|_| {
        anyhow::anyhow!("runner {pipe_label} connect thread exited before publishing its handle")

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/windows-sandbox-rs/src/elevated/runner_client.rs:225 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/a28583f7cad3896d. Report an issue: GitHub.