Chrome Canary 34.0.1775.0
node.js 0.11.9

```javascript
(function () {
  "use strict";

  for (let i in [1, 2, 3]) {
    setTimeout(function () {
      console.log(i);
    }, 0);
  }
})();
```

Ah... It seems like per-iteration binding is implemented only for ```for..in```