Strange indexOf issue with large arrays. Works in some runtimes and not others (node)

gistfile1.js

// Run this script with Node.js to see it throw. Works fine in browsers for some reason. Maybe an optimisation bug

function loop() {
  var arr = [0];

  var i = 0;

  //eval('(1)');            // ==== UNCOMMENTING THIS MAKES IT WORK

  while (i < 4101) {        // ==== MAKING THIS SMALLER MAKES IT WORK
    var num = (i % 2) / 2;  // ==== SIMPLIFYING THIS MAKES IT WORK

    //console.log(num);

    if (arr.indexOf(num) !== Array.prototype.indexOf.call(arr, num)) {
      console.log('i', i);
      console.log('num', num);
      throw new Error('WTF this should not happen!');
    }

    i++;
  }
}

loop();