[Webkit-unassigned] [Bug 175307] New: GetOwnProperty of TypedArray indexed fields is wrongly configurable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175307

            Bug ID: 175307
           Summary: GetOwnProperty of TypedArray indexed fields is wrongly
                    configurable
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Trivial
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rmorisset at apple.com

```
let a = new Uint8TypedArray(10);
let b = Object.getOwnPropertyDescriptor(a, 0);
assert(b.configurable === false);
```
should not fail: by section 9.4.5.1 (https://tc39.github.io/ecma262/#sec-integer-indexed-exotic-objects-getownproperty-p) that applies to integer indexed exotic objects, and section 22.2.7 (https://tc39.github.io/ecma262/#sec-properties-of-typedarray-instances) that says that typed arrays are integer indexed exotic objects.

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