LayoutTests/http/tests/svg/change-id-with-pending-resources.html

<script>
// Test passes if it does not crash.
// Note: this test is located under Layouttests/http in order to load an external
//       document and modify it without hitting security restrictions.
    if (window.testRunner) {
        testRunner.waitUntilDone();
        testRunner.dumpAsText();
    }

    function crash() {
        q = document.getElementById('root').contentDocument;
        document.write("");
        q.getElementById('d').id = "maskedGradient";
        document.write("If this text is visible and the test did not crash, this test passes");
        if (window.testRunner)
            testRunner.notifyDone();
    }
</script>
<object data="http://127.0.0.1:8000/svg/resources/svg-use-defs-rect.svg" id="root" onload="crash()"/>