[Webkit-unassigned] [Bug 17250] New: Array instanceof test fails when using iframes

Fri Feb 8 22:46:41 PST 2008

http://bugs.webkit.org/show_bug.cgi?id=17250

           Summary: Array instanceof test fails when using iframes
           Product: WebKit
           Version: 523.x (Safari 3)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sanjiv.jivan+wk at gmail.com

I have an iframe where I'm creating an Array with in the parent's context via
new parent.Array(). I now call a function in the parent window passing this
array. When the parent function receives this argument, it fails the instanceof
test.

I understand that passing "new Array()" from the iframe to parent will cause
the "instanceof Array " test to fail in the parent because the contexts of the
two are different, but in this case I am creating a array from the parent
context itself yet if fails the "instanceof Array" test. Below is a simple
testcase illustrating the problem. This test runs fine on IE, Firefox and Opera
but fails on Safari only.

parent.html
<html>
<head>
</head>
<body>
<script type="text/javascript">
    function isArray(arr) {
        alert(arr instanceof Array);
    }
</script>
</body>
<iframe src="child.html"></iframe>
</html>

child.html
<html>
<head>
</head>
<body>
 <script type="text/javascript">
     function test() {
         var arr = new parent.Array();
         parent.isArray(arr);
     }
 </script>

<button onclick="test()">Array Test</button>
</body>
</html>

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