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chromium/third_party/blink/web_tests/external/wpt/html/links/icon/no-error-event.sub.html 

<!DOCTYPE html>
<meta charset="utf-8" />
<title>&lt;link rel="icon"&gt; doesn't fire an error event</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  async_test((t) => {
    const link = document.createElement("link");
    link.rel = "icon";
    link.href = "http://{{hosts[][nonexistent]}}";

    link.addEventListener("error", t.unreached_func());
    document.head.append(link);
    t.step_timeout(() => t.done(), 2000);
  }, document.title);
</script>