test/fixtures/wpt/streams/piping/detached-context-crash.html

<!DOCTYPE html>
<body>
<script>
window.onload = () => {
  const i = document.createElement("iframe");
  i.src = "about:blank";
  document.body.appendChild(i);

  const rs = new i.contentWindow.ReadableStream({
    start(controller) { controller.error(); }
  });
  const ws = new i.contentWindow.WritableStream();

  i.remove();

  // pipeTo() should not crash with a ReadableStream or WritableStream from
  // a detached iframe.
  rs.pipeTo(ws);
};
</script>
</body>