[Webkit-unassigned] [Bug 174756] New: [ES6] Generator with yield * removed property in result from `next`

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174756

            Bug ID: 174756
           Summary: [ES6] Generator with yield * removed property in
                    result from `next`
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gskachkov at gmail.com

```
var O = { [Symbol.iterator]() { return this; }, next() { return { floof: 1, done: false, value: 1 }; } }; 
function* g() { yield* O; } 
let it = g(); 
it.next(); // { done: false, value: 1; }, BUT should be { floof: 1, done: false, value: 1 }, same object returned from .next();
```

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