use-external-base-change-assert.html

<!DOCTYPE html>
<svg>
  <use href="resources/linkingCircle-f.svg#circle-1"/>
  <script>
    if (window.testRunner)
        testRunner.dumpAsText();
    var baseElement = document.createElement("base");
    baseElement.setAttribute("href", "http://www.example.com/");
    document.head.appendChild(baseElement);
  </script>
</svg>
<p>PASS if no assert in debug</p>

chromium/third_party/blink/web_tests/svg/custom/use-external-base-change-assert.html