<svg xmlns="http://www.w3.org/2000/svg">
<defs>
<clipPath id="clip0">
<rect width="1" height="1" clip-path="url(#clip)" />
</clipPath>
<clipPath id="clip2">
<rect width="100" height="100" clip-path="url(#clip0)"/>
</clipPath>
<clipPath id="clip">
<rect width="1" height="1" clip-path="url(#clip2)"/>
</clipPath>
<mask id="mask1" x="0" y="0" width="1" height="1" maskContentUnits="objectBoundingBox">
<rect width="1" height="1" clip-path="url(#clip)" />
</mask>
</defs>
<text x="10" y="75">This test passes if it does not crash.</text>
<circle r="50" mask="url(#mask1)"/>
</svg>