<!--
  Any copyright is dedicated to the Public Domain.
  http://creativecommons.org/publicdomain/zero/1.0/
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<!DOCTYPE HTML>
<html>
<head>
  <title>Failure to create a Promise shouldn't crash</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test"></pre>
<script class="testbody" type="text/javascript">
  async function runTest() {
    const iframe = document.createElement('iframe');
    document.getElementById("content").appendChild(iframe);

    const serviceWorker = iframe.contentWindow.navigator.serviceWorker;
    const worker = await iframe.contentWindow.navigator.serviceWorker.register("empty.js", {});

    iframe.remove();

    // We can't wait for this promise to settle, because the global's
    // browsing context has been discarded when the iframe was removed.
    // We're just checking if this call crashes, which would happen
    // immediately, so ignoring the promise should be fine.
    worker.navigationPreload.disable();
    ok(true, "navigationPreload.disable() failed but didn't crash.");

    SimpleTest.finish();
  }

  SimpleTest.waitForExplicitFinish();
  // We can't call unregister on the worker after its browsing context has been
  // discarded, so use SpecialPowers.removeAllServiceWorkerData.
  SimpleTest.registerCleanupFunction(() => SpecialPowers.removeAllServiceWorkerData());
  onload = function() {
    SpecialPowers.pushPrefEnv({"set": [
      ["dom.serviceWorkers.exemptFromPerDomainMax", true],
      ["dom.serviceWorkers.enabled", true],
      ["dom.serviceWorkers.navigationPreload.enabled", true],
      ["dom.serviceWorkers.testing.enabled", true],
    ]}, runTest);
  };
</script>
</pre>
</body>
</html>
