Cannot access external variables in For-Of Loop (Including globals declared with 'use' keyword)

[cloew]

In Spider .1.5, I noticed some unexpected behavior.
You cannot access external variables in a for-of loop.

The following code exhibits the error.
Compiling the loop will cause errors for console, myObj, and somethingElse.

use console;

var myObj = {first: 1, second: 2, third: 3};
var somethingElse = "Something Else";

for key of myObj {
    console.log(myObj[key]);
    console.log(somethingElse);
}