Side effects when passing objects to function in C++

Question

I have read in C++ : The Complete Reference book the following

Even though objects are passed to functions by means of the normal call-

Answer 1

That passage is probably talking about this situation:

class A {
  int *p;
public:
  A () : p(new int[100]) {}
  // default copy constructor and assignment
 ~A() { delete[] p; }
};

Now A object is used as pass by value:

void bar(A copy)
{
  // do something
  // copy.~A() called which deallocates copy.p
}
void foo ()
{
  A a;  // a.p is allocated
  bar(a);  // a.p was shallow copied and deallocated at the end of  'bar()'
  // again a.~A() is called and a.p is deallocated ... undefined behavior
}