[boost] [c++ question] detecting reference to temporaries

I have a stupid question related to a bug in boost.test. A piece of code is doing something like: const value& get() { return *internal_iterator; // can be a ref or not to value or another type } The fix is trivial, *but* I want to test it. Is there any technique that would let me test for reference to temporaries? The only option I see would be to promote compiler warnings into error, but maybe there is something there? Thanks, Raffi (complete example here: https://github.com/boostorg/test/blob/90d577a620e008417af79f5caa25e701eef954... )