true / null; // expect runtime error true / true; // expect runtime error true / "s"; // expect runtime error true / 123; // expect runtime error null / null; // expect runtime error null / true; // expect runtime error null / "s"; // expect runtime error null / 123; // expect runtime error 123 / null; // expect runtime error 123 / true; // expect runtime error 123 / "s"; // expect runtime error "s" / null; // expect runtime error "s" / true; // expect runtime error "s" / 123; // expect runtime error