258683 2023-06-29 10:29:09 -0700 Function defined within a `with` statement, but called from outside it - cannot access variables exposed by `with` 2023-09-24 13:59:13 -0700 1 1 1 Unclassified WebKit JavaScriptCore Safari 17 All All RESOLVED DUPLICATE 163209 InRadar P2 Normal --- 1 niseg98160 webkit-unassigned ashvayka mark.lam webkit-bug-importer ysuzuki oldest_to_newest 1964281 0 niseg98160 2023-06-29 10:29:09 -0700 `with` is deprecated, but there is still a bunch of legacy code that uses it. This code works fine in Firefox and Chrome but throws "Can't find variable: foo" in Safari: ```js let obj = {foo:"bar"}; with(obj) { function test() { console.log(foo); } } test(); ``` Perchance.org, for example, uses `with` as part of its DSL, and so a subset of 'generators' are broken for Safari users. Possibly related: https://bugs.webkit.org/show_bug.cgi?id=231166 1965387 1 webkit-bug-importer 2023-07-06 10:30:21 -0700 <rdar://problem/111857202> 1979665 2 ashvayka 2023-09-24 13:59:13 -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 ***