openai/codex · error

failed to unlock synthetic bubblewrap mount registry {}: {er

Error message

failed to unlock synthetic bubblewrap mount registry {}: {err}

What it means

Error "failed to unlock synthetic bubblewrap mount registry {}: {err}" thrown in openai/codex.

Source

Thrown at codex-rs/linux-sandbox/src/linux_run_main.rs:1324

        .truncate(false)
        .open(&lock_path)
        .unwrap_or_else(|err| {
            panic!(
                "failed to open synthetic bubblewrap mount registry lock {}: {err}",
                lock_path.display()
            )
        });
    if unsafe { libc::flock(lock_file.as_raw_fd(), libc::LOCK_EX) } < 0 {
        let err = std::io::Error::last_os_error();
        panic!(
            "failed to lock synthetic bubblewrap mount registry {}: {err}",
            lock_path.display()
        );
    }
    let result = f();
    if unsafe { libc::flock(lock_file.as_raw_fd(), libc::LOCK_UN) } < 0 {
        let err = std::io::Error::last_os_error();
        panic!(
            "failed to unlock synthetic bubblewrap mount registry {}: {err}",
            lock_path.display()
        );
    }
    result
}

fn synthetic_mount_marker_dir(path: &Path) -> PathBuf {
    synthetic_mount_registry_root().join(format!("{:016x}", hash_path(path)))
}

pub(crate) fn synthetic_mount_registry_root() -> PathBuf {
    static REGISTRY_ROOT: OnceLock<PathBuf> = OnceLock::new();

    REGISTRY_ROOT
        .get_or_init(|| {
            let effective_uid = unsafe { libc::geteuid() };
            let temp_dir = std::env::temp_dir();

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/linux-sandbox/src/linux_run_main.rs:1324 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/d4cebda200245457. Report an issue: GitHub.