A question about uninitialized variables

###### Version

chakra-1_11_22

###### Test case

```js
var h = function f(a0 = function () {
a2;
}(), a2) {
};
h();
```

###### Execution steps

```js
./ChakraCore/out/Debug/ch testcase.js
```

###### Output

```

```

###### Expected behavior

```js
ReferenceError: can't access lexical declaration `a2' before initialization
```

###### Description

When executing this test case, `a2` is not initialized before the call, other engines (such as v8, spiderMonkey, JavaScriptCore, etc.) threw a `ReferenceError`, but chakra did not do so. Is this a different implementation of chakra?