C++ :: Using Smart Pointers To Sort And Relink Potentially Large Data Elements

I am trying to use smart pointers to sort and re-link potentially large data elements. I have defined a class in my code for smart pointers, as listed below:

template <typename T>
class sptr {
public:
sptr(T *_ptr=NULL) { ptr = _ptr; }

[Code] ....

The object I'm trying to sort is a singly-linked list containing class objects with personal records (i.e., names, phone numbers, etc.). The singly-linked list class has an iterator class within it, as listed below.

template <class T>
class slist {
private:
struct node {
node() { data=T(); next=NULL; }

[Code] .....

The following is my function within my list class for "sorting" using the smart pointers.

template <typename T>
void slist<T>::sort(){
vector< sptr<node> > Ap(N); // set up smart point array for list
//slist<T>::iterator iter = begin();
node *ptrtemp = head->next;

[Code] .....

I must have a bad smart pointer assignment somewhere because this code compiles, but when I run it, std::bad_alloc happens along with a core dump. Where am I leaking memory?