LayoutTests/svg/dom/SVGAnimatedString-detached-set-baseVal.html

<p>This test passes if it doesn't crash.</p>
<script>
if (testRunner)
    testRunner.dumpAsText();

let animatedString = (() => {
    return (new Document).createElementNS('http://www.w3.org/2000/svg', 'text').className;
})();

if (window.GCController)
    GCController.collect();

animatedString.baseVal = 'foo';
let newValue = animatedString.baseVal;
document.write(newValue == 'foo' ? 'PASS' : `FAIL - ${newValue}`);

</script>