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<!DOCTYPE html>
<html>
<head>
<title> postMessage with duplicate transfer objects raises DataCloneError exception </title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id=log></div>
<div style="display:none">
<iframe width="70%" onload="PostMessageTest()" src="./support/ChildWindowPostMessage.htm"></iframe>
</div>
<script>
var description = "Test Description: " +
"postMessage with duplicate transfer objects raises DataCloneError exception.";
var DATA = "ports";
var TARGET = document.querySelector("iframe");
function PostMessageTest()
{
test(function()
{
assert_throws("DATA_CLONE_ERR", function()
{
assert_own_property(window, "MessageChannel", "window");
var channel = new MessageChannel();
TARGET.contentWindow.postMessage(DATA, "*", [channel.port1, channel.port1]);
});
}, description);
}
</script>
</body>
</html>
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