231166 2021-10-04 04:28:34 -0700 "Can't find variable" that's let-declared within `with` statement when executing function that's declared within same `with` statement 2023-09-24 13:59:23 -0700 1 1 1 Unclassified WebKit JavaScriptCore Safari 15 Unspecified Unspecified RESOLVED DUPLICATE 163209 InRadar P2 Normal --- 1 yanahij531 webkit-unassigned ashvayka fpizlo kevin_neal webkit-bug-importer ysuzuki oldest_to_newest 1800027 0 yanahij531 2021-10-04 04:28:34 -0700 In Firefox and Chrome the following code works fine, but Safari throws an error saying that the variable `a` cannot be found. ``` with({}) { let a = 1; function foo() { console.log(a); } foo(); } ``` https://jsbin.com/hiwihiyaxi/edit?html,console 1800619 1 kevin_neal 2021-10-05 10:13:51 -0700 Thanks for filing. I was able to reproduce the bug in Safari. The appropriate engineers have been notified. 1800621 2 webkit-bug-importer 2021-10-05 10:14:10 -0700 <rdar://problem/83892140> 1979667 3 ashvayka 2023-09-24 13:59:23 -0700 Thank you for reporting! This bug arises because block-level function declarations in global code, which are subject to currently unimplemented legacy Annex B hoisting, always receive top-level scope instead of lexical one. https://bugs.webkit.org/show_bug.cgi?id=163209 implements Annex B function hoisting for global code, fixing this issue. *** This bug has been marked as a duplicate of bug 163209 ***