openai/codex · error

WriteFile failed: {err}

Error message

WriteFile failed: {err}

What it means

Error "WriteFile failed: {err}" thrown in openai/codex.

Source

Thrown at codex-rs/windows-sandbox-rs/src/unified_exec/backends/legacy.rs:227

        }
    }
}

fn write_all_handle(handle: HANDLE, mut bytes: &[u8]) -> Result<()> {
    while !bytes.is_empty() {
        let mut written = 0u32;
        let ok = unsafe {
            WriteFile(
                handle,
                bytes.as_ptr() as *const _,
                bytes.len() as u32,
                &mut written,
                ptr::null_mut(),
            )
        };
        if ok == 0 {
            let err = unsafe { GetLastError() } as i32;
            return Err(anyhow::anyhow!("WriteFile failed: {err}"));
        }
        if written == 0 {
            anyhow::bail!("WriteFile returned success but wrote 0 bytes");
        }
        bytes = &bytes[written as usize..];
    }
    Ok(())
}

#[allow(clippy::too_many_arguments)]
fn finalize_exit(
    exit_tx: oneshot::Sender<i32>,
    process_handle: Arc<StdMutex<Option<HANDLE>>>,
    thread_handle: HANDLE,
    output_join: std::thread::JoinHandle<()>,
    logs_base_dir: Option<&Path>,
    command: Vec<String>,
) {

View on GitHub (pinned to 339751715c)

Solutions

1. Check that the pipe to the process is still open (the process may have exited) and inspect the inner Win32 error; retry the write.

When it happens

Trigger: Thrown at codex-rs/windows-sandbox-rs/src/unified_exec/backends/legacy.rs:227 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/9e084720e386321a. Report an issue: GitHub.