[Webkit-unassigned] [Bug 220142] New: A possible issue about variable redeclaration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220142

            Bug ID: 220142
           Summary: A possible issue about variable redeclaration
           Product: WebKit
           Version: WebKit Local Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nwu_ty at 163.com

# 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! ��

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