https://github.com/facebook/hermes/issues/52

error.log

generator.js:1:9: error: 'identifier' expected after 'function'
function* seq(n) {
~~~~~~~~^

shell returned 2

for-of.js

for (var x of [0, 1, 2]) {
  print(x);
}

generator.js

function* seq(n) {
  for (var i = 0; i < n; i++) {
    yield i;
  }
}

for (var x of seq(3)) {
  print(x);
}