SerenityOS
LibWeb: Crash on SVG clip-path reference to other SVG tree with display:none
This is a reduction of https://github.com/awesomekling that currently crashes due to a bogus layout tree.
As I understand it, url(#jeez) in the second <svg> tree should not see the <clippath id="jeez"> in the first <svg> tree. In other words, ID references should be local to the current SVGSVGElement.
<!doctype html>
<svg style="display: none">
<clippath id="jeez">
<rect width="16" height="16"></rect>
</clippath>
</svg>
<svg>
<g clip-path="url(#jeez)"></g>
</svg>
cc @MacDue
I don't think the clipPath elements need to be local to the SVG, the following example works in Chrome and Firefox (and I see nothing disallowing it within the spec):
<!doctype html>
<svg>
<clippath id="jeez">
<circle cx="50" cy="50" r="50" />
</clippath>
</svg>
<svg>
<g clip-path="url(#jeez)">
<rect fill="red" width="100" height="100">
</rect>
</g>
</svg>
If you place display: none on the first SVG then the clip path does nothing in the second SVG. LibWeb only crashes when display: none is set on the first SVG, with it removed it does not crash, but the clipping is incorrect.
