[Webkit-unassigned] [Bug 270517] New: scope of async function parameters are broken with local variable declaration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=270517

            Bug ID: 270517
           Summary: scope of async function parameters are broken with
                    local variable declaration
           Product: WebKit
           Version: Safari 17
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Major
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zjwpeter at gmail.com

Run this code:

```js
window.fn1 = async e => { var e = e["source"]; console.log({ e }) };
window.fn1({ source: 123 })
```

All other browsers works, Safari 17.3.1 throws an error.

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