Is there a way to pass a reference to python, that will raise an exception if used after the python function returns?

[daltairwalter]

I have a C++ object that I am trying to use in a trampoline function. If I pass it directly by reference, I see:
return_value_policy = copy, but type ... is non-copyable!

If I change what I am passing to a pointer, the code works, but if I store the object in python, I see a crash if this object is used later. Instead of a crash, I would like to see a python exception that says the objects lifetime has expired.

I think I could do this by using a lambda in all of the def calls, but I am wondering if there is an easier way.