LayoutTests/fast/loader/cancel-load-during-port-block-timer.html

<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    window.open("http://127.0.0.1:22").document.write('');

    if (window.testRunner)
        testRunner.notifyDone();
</script>
If this does crash, the test has passed.