<!doctype html>
<title>Cancelling error after document.open</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<iframe src="004-1.html"></iframe>
<script>
var t = async_test();
var iframe;
onload = t.step_func(function() {
  var iframe = document.getElementsByTagName("iframe")[0];
  var img = iframe.contentDocument.createElement("img");
  img.onerror = t.step_func(function() {assert_unreached()})
  img.src = "missing";
  iframe.contentDocument.body.appendChild(img);
  iframe.contentDocument.open()
  setTimeout(function() {t.done();}, 500);
});
</script>