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<html><head>
<title>Crash [@ nsGenericElement::SetAttr] with classList.toggle</title>
<script>
var classList;
var interval;
function run() {
classList = window.frames[0].document.documentElement.classList;
window.frames[0].location.reload();
interval = setInterval(function(aClassList) {aClassList.toggle('a'); forcegc();}, 10, classList);
// Let the interval run for awhile and close the window after 2 seconds.
setTimeout(function() { clearInterval(interval); window.opener.done(); window.close(); }, 2000);
}
function forcegc(){
SpecialPowers.forceGC();
SpecialPowers.gc();
}
</script>
</head>
<body onload="run()">
<iframe></iframe>
</body>
</html>
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