🚀 go-pugleaf

Here is the "riddle" for today:  

Consider the following file:

//************************* file.cc


template <class Type>
class Array {
public:
    Array() { }
    Array(const Array &iA) { }  //*** tricky line
};


template <class Type>
class image {
public:
   image()  { }
protected:
   Array<Type> data;
};


main()
{
  image<double> da;
  image<double> du=da;       // KO line
}

//******************* end of file.cc


With the tricky line commented out, the gnu compiler 2.2.2
(on IPC with OS 4.1.1) works fine. Otherwise, the above file
yields the following message (in correspondence of the KO line):

file.cc: In function `int  main ()':
file.cc:21: no member function `Array<double>::Array<double>'


Note: I don't think the error is due to the slimness of the class definition.
This file is just an excerpt of a "real" piece of code which gave the same
error message.

Once again, your help will be appreciated.
Thanks.