Bug 146981 – using "with (o) {...}" shouldn't cause every variable to be closed over

• Status: NEW
• Component: JavaScriptCore

[Saam Barati]

For example, consider this:

```
let x, y;
with(o) {
    print(x);
}
```
There is no way anything in the "with" may resolve to "y". It's stupid to put it in the JSLexicalEnvironment when it doesn't need to be