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chromium/third_party/blink/web_tests/external/wpt/fetch/api/crashtests/body-window-destroy.html 

<!DOCTYPE html>
<meta charset="utf-8">
<iframe srcdoc='
  <script>
    let a = new Blob(["a", "𢕾"], {})
    let b = new Response(a)
    try { let _ = b.body } catch (e) { }
    frameElement.remove()
    b.json().catch(() => {})
  </script>
'></iframe>