Bug 278070 – [JSC] Use for-of instead of for-in in stress tests for Temporal.Duration

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Sosuke Suzuki]

In `stress/temporal-duration.js`, a `for-in` loop is used as follows:

```javascript
    const badStrings = [
        '', '+', '+P', '-P', '+-P',
        'P', 'P1', 'PT', 'P1YT', 'PT1',
        'PT20.S', 'PT.20S',
        'P1W1Y',  'PT1S1M',
        'P1.1Y', 'PT1.1H1M', 'PT1.1M1S',
        'PT1.1111111111H', 'PT1.1111111111M', 'PT1.1111111111S',
        `P${Array(309).fill(9).join('')}Y`
    ];
    for (const badString in badStrings)
        shouldThrow(() => Temporal.Duration.from(badString), RangeError);
```

Since `badString` becomes the index of the array, this test will pass regardless of the values.

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/32159

[EWS]

Committed 282271@main (c5784413c960): <https://commits.webkit.org/282271@main>

Reviewed commits have been landed. Closing PR #32159 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/133899774>