openai/codex · error · anyhow::Error

runner pipe closed before exit

Error message

runner pipe closed before exit

What it means

Error "runner pipe closed before exit" thrown in openai/codex.

Source

Thrown at codex-rs/windows-sandbox-rs/src/elevated_impl.rs:237

                        read_roots_override,
                        read_roots_include_platform_defaults,
                        write_roots_override,
                        &deny_read_paths_override,
                        &deny_write_paths_override,
                        proxy_enforced,
                        crate::WindowsSandboxProxySettingsMode::Reconcile,
                    )
                },
            )?;
            let (pipe_write, mut pipe_read) = transport.into_files();
            let cancel_writer = spawn_cancel_writer(&pipe_write, cancellation)?;

            let mut stdout = Vec::new();
            let mut stderr = Vec::new();
            let result = loop {
                let msg = match read_frame(&mut pipe_read) {
                    Ok(Some(msg)) => msg,
                    Ok(None) => break Err(anyhow::anyhow!("runner pipe closed before exit")),
                    Err(err) => break Err(err),
                };
                match msg.message {
                    Message::SpawnReady { .. } => {}
                    Message::Output { payload } => match decode_bytes(&payload.data_b64) {
                        Ok(bytes) => match payload.stream {
                            OutputStream::Stdout => stdout.extend_from_slice(&bytes),
                            OutputStream::Stderr => stderr.extend_from_slice(&bytes),
                        },
                        Err(err) => {
                            break Err(err);
                        }
                    },
                    Message::Exit { payload } => break Ok((payload.exit_code, payload.timed_out)),
                    Message::Error { payload } => {
                        break Err(anyhow::anyhow!("runner error: {}", payload.message));
                    }
                    other => {

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/windows-sandbox-rs/src/elevated_impl.rs:237 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/f838a65f71d9bab5. Report an issue: GitHub.