<!--
onerror = function(a, b, c, d) {
  return false; // the error is "not handled"
}
function x() {
  y();
}
x();
/*
-->
<!doctype html>
<title>onerror, "not handled"</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
async_test(function() {
  var worker = new Worker('#');
  worker.onerror = this.step_func(function(e) {
    assert_true(e instanceof ErrorEvent, 'e instanceof ErrorEvent');
    assert_equals(typeof e.message, 'string', 'typeof e.message');
    assert_equals(e.filename, document.URL+'#', 'e.filename');
    assert_equals(typeof e.lineno, 'number', 'typeof e.lineno');
    assert_equals(typeof e.colno, 'number', 'typeof e.column');
    e.preventDefault(); // "handled"
    this.done();
  });
});
</script>
<!--
*/
//-->