for loop on something else than an object
<p>What happens when I try to loop on an int like this:</p>

<pre><code>var x = 0;
for (var k in x) {
  // x[k]
}
</code></pre>

<p>Should I look for unexpected behavior or does it just not enter the loop?
(so far my experiments seem to show that it does not enter the loop... but it could do something I don't see)</p>
