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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="resources/utils.js"></script>
<head>
<iframe id="iframe"></iframe>
<script>
setup(() => assertSpeculationRulesIsSupported());
async_test(t => {
const doc = iframe.contentDocument;
const script = doc.createElement('script');
script.type = 'speculationrules';
script.text = `{"prerender": [{"source": "list", "urls": [] }] }`;
doc.head.appendChild(script);
iframe.remove();
t.step_timeout(() => {
document.head.appendChild(script);
t.done();
}, 0);
}, 'Removing speculationrules script from detached document should not crash');
</script>
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