accessibility-beforematch-marker-crash.html

<!DOCTYPE html>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<li id=hiddenli hidden=until-found>
  <a id><a><div id=hiddentext>hiddentext</div>
</li>
<script>
const testCase = async_test('Regression test for crbug.com/1250959 should not crash');

hiddenli.addEventListener('beforematch', testCase.step_func(() => {
  hiddenli.setAttribute('hidden', 'until-found');
  setTimeout(testCase.step_func_done(() => {
    hiddenli.removeAttribute('hidden');
  }));
}));

testCase.step(() => {
  assert_own_property(window, 'testRunner', 'This test requires testRunner');
  testRunner.findString('hiddentext', ['Async']);
});
</script>

chromium/third_party/blink/web_tests/accessibility/accessibility-beforematch-marker-crash.html