Strange bug in ListPath<>

[Alpar Juttner]

Valgrind report an error on the following code:

    ListPath<ListDigraph> p,q;
    p.addBack(a);
    q=p;

The problem seems to be that q=p tries to copy bitwise instead of using the template ListPath<>::operator=() implementation.

Implementing a non-template version solves the problem, but I don't understand why the template version is used.

I fear that this issue may affect other Path structures, or even other tools, too.