When using @PageActivationContext and providing a no-args activate event handler, the handler may be called too soon

It appears that the onActivate() method is called before the @PageActivationContext logic, which means the following can fail:

@PageActivationContext
private MyEntity entity;

void onActivate()
{
if (entity == null) throw new RuntimeException("Entity not found.");
}

The RuntimeException is thrown even when a valid Entity is in the page activation context.