{LABEL} must not have leading or trailing whitespace

Error message

{LABEL} must not have leading or trailing whitespace

What it means

Error "{LABEL} must not have leading or trailing whitespace" thrown in openai/codex.

Source

Thrown at codex-rs/core/src/config/mod.rs:3069

        "python",
        "python_user_visible",
        "submodel_delegator",
        "terminal",
        "tool_search",
        "web",
    ];

    let Some(namespace) = namespace else {
        return Ok(());
    };
    if namespace.is_empty() {
        return Err(std::io::Error::new(
            std::io::ErrorKind::InvalidInput,
            format!("{LABEL} must not be empty"),
        ));
    }
    if namespace.trim() != namespace {
        return Err(std::io::Error::new(
            std::io::ErrorKind::InvalidInput,
            format!("{LABEL} must not have leading or trailing whitespace"),
        ));
    }
    if !namespace
        .bytes()
        .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'_' | b'-'))
    {
        return Err(std::io::Error::new(
            std::io::ErrorKind::InvalidInput,
            format!("{LABEL} must match ^[a-zA-Z0-9_-]+$"),
        ));
    }
    if namespace.chars().count() > MAX_LEN {
        return Err(std::io::Error::new(
            std::io::ErrorKind::InvalidInput,
            format!("{LABEL} must be at most {MAX_LEN} characters"),
        ));

View on GitHub (pinned to 339751715c)

Solutions

Trim leading and trailing whitespace from {LABEL}.

When it happens

Trigger: Thrown at codex-rs/core/src/config/mod.rs:3069 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/d0bf0b96eb1672fb. Report an issue: GitHub.