<!DOCTYPE html>
<body>
<title>Crash with lazy parsing child rules and stylesheet copy-on-write</title>
<link rel="help" href="https://crbug.com/1404879">
<link href="../support/delete-other-rule-crash.css" rel="stylesheet">
<script src="/common/gc.js"></script>
<script>
addEventListener('DOMContentLoaded', async () => {
  requestAnimationFrame(async () => {
    document.styleSheets[0].deleteRule(0);
    await garbageCollect();
    document.styleSheets[0].cssRules[0].cssText;
  });
});
</script>
