UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Steps to reproduce the problem:
1. Create an index.mjs or index.js with
```
let x = 12; 
console.log(x);
```

2. Include in html page via <script type="module"...
3. Set a breakpoint on line 2
4. When stopped, try and inspect x:
    a. hover over variable in source
    b. type `x` on console
    c. Watch on `x` shows notavailable
    d. ("Locals" is missing altogether)

What is the expected behavior?
variable is in scope

What went wrong?
Throws ReferenceError 

Did this work before? N/A 

Chrome version: 68.0.3440.106  Channel: stable
OS Version: OS X 10.13.6
Flash Version: 

Appears to be for all top level variables plus declared functions. Variables inside functions behave correctly. (nested scope okay, just top-level module)