Destructor for struct invoked many times

[Antonio Corbi via Digitalmars-d-learn]

Hi,

In this simple example, the destructor for the struct is invoked 
four more times than expected:

----
import std.stdio;

struct Person {
  string name;
  int age;

  ~this() {
    writefln("%s is gone (0x%x)", name, &this);
  }
}

int main(string[] args) {
  Person* p = new Person;

  writefln ("Created person (0x%x)", p);
  p.name = "Peter";
  p.age = 23;

  writeln("Person:", *p); // Comment this line and try

  return 0;
}
----

Output:

Created person (0x7f85ee997000)
Person:Person("Peter", 23)Peter is gone (0x7ffd916c1560)
Peter is gone (0x7ffd916c15c0)

Peter is gone (0x7ffd916c1640)
Peter is gone (0x7ffd916c16f0)
Peter is gone (0x7f85ee997000)
-----

If I comment the line "writeln("Person:", *p);" then the 
destructor is invoked only one time as expected.

Why is it?