Bug 163574 – Our ToThis semantics look to be affected by whether or not a local variable is captured

• Status: NEW
• Component: JavaScriptCore

[Saam Barati]

This doesn't seem spec compliant to me:

```
function foo() { function bar() { return x; } var x = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__").get; return x(); }
foo() // [object Object]
```

```
function foo() { var x = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__").get; return x(); }
foo() // Exception: TypeError: Can't convert undefined or null to object
```