Can I use the same variable to initialise two class objects?

[VBCherry]

And what are going to do if some Device object is about to destruct?
Are you going to remove its pointer from the QList<Device*>? How?

I honestly hadn't considered this. I had only thought about cleaning up. Each Device object has a unique ID, which the user provides. I could save the Device pointers along with their IDs in a hash table of sorts (QHash or QMap<int,Device*>). This could allow me to delete the specific pointer. And I could add an event in the destructor, so I am informed if a particular object is deleted.
Does this sound right? Or am I overcomplicating what should be a straightforward task?