Bug 258683 – Function defined within a `with` statement, but called from outside it - cannot access variables exposed by `with`

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: JavaScriptCore

[Joe]

`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

[Radar WebKit Bug Importer]

<rdar://problem/111857202>

[Alexey Shvayka]

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 ***