220517 2021-01-11 11:26:25 -0800 SyntaxError Duplicate parameter in function with destructuring with assignment 2023-10-12 15:09:54 -0700 1 1 1 Unclassified WebKit New Bugs Safari 14 Mac (Intel) macOS 10.15 RESOLVED DUPLICATE 247433 BrowserCompat, InRadar P2 Normal --- 1 ychris2010-1 webkit-unassigned ashvayka edward simon.fraser webkit-bug-importer oldest_to_newest 1718748 0 ychris2010-1 2021-01-11 11:26:25 -0800 Webkit throws a SyntaxError with message "Duplicate parameter <name> not allowed in function with destructuring parameters." when attempting to assign a function to another variable. This does not occur if the function is declared separately from the assignment. Works: function a({ test: a }) { console.log(a); } let b = a; Throws SyntaxError: let b = function a({ test: a }) { console.log(a); }; Reproduced with Webkit build 271364 1720371 1 webkit-bug-importer 2021-01-18 11:27:12 -0800 <rdar://problem/73327300> 1984737 2 ashvayka 2023-10-12 15:09:54 -0700 This was fixed in https://commits.webkit.org/256478@main *** This bug has been marked as a duplicate of bug 247433 ***