Function _leave_task

crates/stdlib/src/_asyncio.rs:2503–2527

(loop_: PyObjectRef, task: PyObjectRef, vm: &VirtualMachine)

    #[pyfunction]
    fn _leave_task(loop_: PyObjectRef, task: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
        // Per-thread check, matching CPython's ts->asyncio_running_task
        {
            let running_task = vm.asyncio_running_task.borrow();
            match running_task.as_ref() {
                None => {
                    return Err(vm.new_runtime_error("_leave_task: task is not the current task"));
                }
                Some(current) if !current.is(&task) => {
                    return Err(vm.new_runtime_error("_leave_task: task is not the current task"));
                }
                _ => {}
            }
        }

        *vm.asyncio_running_task.borrow_mut() = None;

        // Also update the module-level dict
        if let Ok(current_tasks) = get_current_tasks_dict(vm)
            && let Ok(dict) = current_tasks.downcast::<rustpython_vm::builtins::PyDict>()
        {
            let _ = dict.del_item(&*loop_, vm);
        }
        Ok(())
    }

    #[pyfunction]
    fn _swap_current_task(loop_: PyObjectRef, task: PyObjectRef, vm: &VirtualMachine) -> PyResult {