Bug 220142 – A possible issue about variable redeclaration

• Component: JavaScriptCore
• Status: RESOLVED DUPLICATE

[Yang Tian]

# Version
d940b47(https://github.com/WebKit/WebKit-http/commit/d940b477848884f63752d25491d9dd0b9d3ccb2d)

# Testcase1:
// Will throw an SyntaxError
function func() {
    if (1) {
        function o() {}
        var o = 1;
    }
}

# Testcase2:
// Will not throw an SyntaxError
if (1) {
    function o() {};
    var o = 1;
}

# Description
In both of the above examples, an variable 'o' declaration error occurred, however Testcase1 throws an exception and Testcase2 doesn't.

I've tried other engines(such as V8, SpiderMonkey), and they all throw SyntaxError, So i suspect it's a bug of jsc.

Please let me know the result whether this is a bug or not. Looking forward to your reply, thanks! 😆

[Radar WebKit Bug Importer]

<rdar://problem/72754003>

[Yusuke Suzuki]

Thanks, this is dupe of 163209 :)

*** This bug has been marked as a duplicate of bug 163209 ***