270517 2024-03-05 07:08:45 -0800 scope of async function parameters are broken with local variable declaration 2024-03-05 07:41:34 -0800 1 1 1 Unclassified WebKit JavaScriptCore Safari 17 Unspecified Unspecified RESOLVED DUPLICATE 223533 P2 Major --- 1 wards.afar.0j webkit-unassigned oldest_to_newest 2018761 0 wards.afar.0j 2024-03-05 07:08:45 -0800 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. 2018766 1 wards.afar.0j 2024-03-05 07:41:34 -0800 *** This bug has been marked as a duplicate of bug 223533 ***