[Webkit-unassigned] [Bug 151026] New: Destructuring Assignment: Properties are valid AssignmentElements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151026

            Bug ID: 151026
           Summary: Destructuring Assignment: Properties are valid
                    AssignmentElements
    Classification: Unclassified
           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: caitpotter88 at gmail.com

Any sort of Property MemberExpression used in a destructuring assignment context results in a syntax error:

```js
({ x: this.x } = { x: true });
({ x: (function() {}).x } = { x: true });
({ x: ({}).x } = { x: true });

// etc ...
```

However, these are all legal (even if they don't make any sense), per http://tc39.github.io/ecma262/#prod-AssignmentElement

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