stylesheet-load-complete-in-detached-iframe-crash.html

<head>
<link rel="stylesheet" type="text/css" href="does-not-exist.css">
</head>
<body>
<iframe id=i></iframe>
<script>
if (window.testRunner) {
  testRunner.dumpAsText();
  testRunner.dumpChildFrames();
}
document.body.appendChild(document.head);
i.contentDocument.body.appendChild(document.body);
console.log("PASS if no crash.");
</script>

chromium/third_party/blink/web_tests/http/tests/css/stylesheet-load-complete-in-detached-iframe-crash.html