C++ code - 8 lines

Link:

C++, pasted on Jul 19:

struct S {
  S() {}
  int a, b;
};

int main() {
  S s = { 4, 5 };
}

Output:

1
2
3

In function 'int main()':
Line 7: error: scalar object 's' requires one element in initializer
compilation terminated due to -Wfatal-errors.