🚀 go-pugleaf

Any time you have a class which contains a pointer to 
dynamically-allocated memory (as your class does), you
WILL NEED an appropriate:

	Assignment operator
	Copy constructor
	Destructor

You will likely also need a default constructor.

Your symptoms are consistent with forgetting one
or both of the assignment operator or copy constructor,
depending on how the addition operator was used. 
(Forgetting the destructor results in a memory leak.)

If you forget any of these, you'll end up with the
kinds of problems you're seeing.

Note that these problems can be silent:  since the
compiler provides you with these functions if you
don't provide them, you won't get any sort of
compiler error.

What I think is happening in your case is that the
compiler supplied assignment operator or copy 
constructor is just doing a memberwise copy of
your object.  Your addition function is creating
the temporary and allocating memory for it.  The
pointer to this memory is copied from the temporary
to the object to which you're assigning/copying
rather than copying the memory.

// Paul Johns