std::istream_iterator

I have a program as follows:

#include <iostream>
#include <iterator>
#include <fstream>
#include <string>

class Stream{
        public:
        //default constructor
        Stream();
        //constructor
        Stream(const std::string&);
        //Returns true if more elements are available
        bool hasNext();
        //Get the next element in the stream
        double getNext();
        private:
        std::istream_iterator<double> streamHandle;
        std::istream_iterator<double> eos;
};
Stream::Stream()
{
        streamHandle = std::istream_iterator<double>(std::cin);
}
Stream::Stream(const std::string& absolutePath)
{
        std::fstream file(absolutePath);
        streamHandle = std::istream_iterator<double>(file);
}
bool Stream::hasNext()
{
        return (streamHandle != eos)? true: false;
}
double Stream::getNext()
{
        double value = *streamHandle;
        ++streamHandle;
        return value;
}
int main()
{
   Stream input("test1");
   if( input.hasNext())
       std::cout << input.getNext();

}

While executing this program,it is core dumping. I know it is happening only if it executes statement ++streamHandle;

So I implemented same functionality without using a class as follows and it works perfectly fine.

#include <iostream>
#include <iterator>
#include <fstream>
#include <string>

void readFile(const std::string& absolutePath)
{
        std::fstream file(absolutePath);
        std::istream_iterator<double> streamHandle = std::istream_iterator<double>(file);
        std::istream_iterator<double> eos;

        while( streamHandle != eos)
        {
                double val= *streamHandle;
                ++streamHandle;
                std::cout << val << "\n";
        }
}
int main()
{
   readFile("test1");
}

Could you please help me to identify what is going wrong while creating a class and iterate over std::istream_iterator from class.