Object.is comparison — what React uses for state bail-out

What does this output?

// React uses Object.is() to decide if state changed
const results = [
  Object.is(0, -0),
  Object.is(NaN, NaN),
  Object.is(null, null),
  Object.is({}, {}),
  Object.is('a', 'a'),
];

results.forEach(r => console.log(r));

// Simulates React bail-out
function setState(current, next) {
  if (Object.is(current, next)) {
    console.log('no re-render');
  } else {
    console.log('re-render');
  }
}

setState(0, -0);
setState({x:1}, {x:1});

Correct Output

false
true
true
false
true
no re-render
re-render

Why this output?