LayoutTests/fast/css/variables/invalid-reference.html - WebKit - Git at Google

 <style>
 :root {
   --a: crimson;
   color: red;
 }
 body {
   color: green;
 }
 p {
   color: orange;
   color: var(--a) var(--b);
 }
 </style>
 <body>
 <p>This text should be green.
 </p>
	<style>
	:root {
	--a: crimson;
	color: red;
	}
	body {
	color: green;
	}
	p {
	color: orange;
	color: var(--a) var(--b);
	}
	</style>
	<body>
	<p>This text should be green.
	</p>