Function cleanup_wait_callback_data

crates/stdlib/src/overlapped.rs:1792–1799

Helper to cleanup callback data when unregistering Just removes from registry - Arc ensures memory stays alive if callback is running

(wait_handle: isize)

    // Helper to cleanup callback data when unregistering
    // Just removes from registry - Arc ensures memory stays alive if callback is running
    fn cleanup_wait_callback_data(wait_handle: isize) {
        if let Ok(mut registry) = wait_callback_registry().lock() {
            // Removing from registry drops one Arc reference
            // If callback already ran, this frees the memory
            // If callback is still pending/running, it holds the other reference
            registry.remove(&wait_handle);
        }
    }

    #[pyfunction]
    fn UnregisterWait(wait_handle: isize, vm: &VirtualMachine) -> PyResult<()> {