I just got bitten by qdev_get_machine()'s behaviour on the user-only emulators, where it can return something that isn't NULL and isn't an instance of TYPE_MACHINE either.
It looks like maybe this can happen in some cases in softmmu too, judging by the way that qdev_get_hotplug_handler() does an object_dynamic_cast() check that it really got back a TYPE_MACHINE. Is this intentional? Does anything rely on qdev_get_machine() returning something odd like this? In the code I have which ran into this I can just make it do an object_dynamic_cast() check like the hotplug_handler code does, but if the current implementation is intentional we should probably document that this is what you're supposed to do. thanks -- PMM
