openai/codex · error · anyhow::Error

frame too large: {}

Error message

frame too large: {}

What it means

Error "frame too large: {}" thrown in openai/codex.

Source

Thrown at codex-rs/windows-sandbox-rs/src/elevated/ipc_framed.rs:155

/// Empty payload for control messages.
#[derive(Debug, Serialize, Deserialize, Clone, Default)]
pub struct EmptyPayload {}

/// Base64-encode raw bytes for IPC payloads.
pub fn encode_bytes(data: &[u8]) -> String {
    STANDARD.encode(data)
}

/// Decode base64 payload data into raw bytes.
pub fn decode_bytes(data: &str) -> Result<Vec<u8>> {
    Ok(STANDARD.decode(data.as_bytes())?)
}

/// Write a length-prefixed JSON frame.
pub fn write_frame<W: Write>(mut writer: W, msg: &FramedMessage) -> Result<()> {
    let payload = serde_json::to_vec(msg)?;
    if payload.len() > MAX_FRAME_LEN {
        anyhow::bail!("frame too large: {}", payload.len());
    }
    let len = payload.len() as u32;
    writer.write_all(&len.to_le_bytes())?;
    writer.write_all(&payload)?;
    writer.flush()?;
    Ok(())
}

/// Read a length-prefixed JSON frame; returns `Ok(None)` on EOF.
pub fn read_frame<R: Read>(mut reader: R) -> Result<Option<FramedMessage>> {
    let mut len_buf = [0u8; 4];
    match reader.read_exact(&mut len_buf) {
        Ok(()) => {}
        Err(err) if err.kind() == std::io::ErrorKind::UnexpectedEof => return Ok(None),
        Err(err) => return Err(err.into()),
    }
    let len = u32::from_le_bytes(len_buf) as usize;
    if len > MAX_FRAME_LEN {

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/windows-sandbox-rs/src/elevated/ipc_framed.rs:155 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/99cc18187b118cb2. Report an issue: GitHub.