LayoutTests/svg/masking/mask-type-not-set.svg

<svg xmlns="http://www.w3.org/2000/svg">
<mask id="mask">
    <rect width="200" height="200" fill="black"/>
    <rect x="50" y="50" width="100" height="100" fill="white"/>
</mask>
<rect width="200" height="200" fill="green" mask="url(#mask)"/>
</svg>