<!DOCTYPE html>
<title>Don't crash when setting a CSS-wide keyword on a custom property</title>
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssperspective">
<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#cssnumericvalue-create-a-type">
<link rel="help" href="https://crbug.com/1240638<">
<div id="target">
  Don't crash
</div>
<script>
  String(new CSSPerspective(CSS.px(1).mul(CSS.px(1)).div(CSS.px(1))));
</script>
