ReactiveProperty not throwing exception

[elhimp]

With object being null:

private GameObject testGO;

void Start() {
    Observable.EveryUpdate()
    .Select(_ => testGO.name)
    .ToReactiveProperty();
    // .ToReadOnlyReactiveProperty();
    // .ToSequentialReadOnlyReactiveProperty();
    // .Subscribe();
}

.ToReactiveProperty .ToReadOnlyReactiveProperty and .ToSequentialReadOnlyReactiveProperty just silently stops working.
While base .Subscribe gonna spam console with red, as it supposed to.