C++ code - 12 lines

Link:

C++, pasted on Aug 1:

struct S
{
  S () {};
};


int
main ()
{
  S s;
  s.S::S ();
}

Output:

1
2
3

In function 'int main()':
Line 11: error: invalid use of 'struct S'
compilation terminated due to -Wfatal-errors.