textpath-reference-path-on-out-of-use-element.html

<!DOCTYPE HTML>
<svg>
  <defs>
    <path id="svgpath" d="M100 100 350 100"/>
    <text id="svgtext">
      <textPath xlink:href="#svgpath">Hello, SVG</textPath>
    </text>
  </defs>
  <use xlink:href="#svgtext"/>
</svg>

chromium/third_party/blink/web_tests/svg/text/textpath-reference-path-on-out-of-use-element.html