<html>
<head>
<script>
  if (window.testRunner){
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
  }

  let request = indexedDB.open(Math.random());
  request.onupgradeneeded = () => {
    let db = request.result;
    let idbObjectStore = db.createObjectStore('b');
    let transaction = idbObjectStore.transaction;
    transaction.dispatchEvent(new Event(''));
    globalThis.testRunner?.notifyDone();
  };
</script>
</head>
<body>
WebKit should not crash.
<body>
</html>