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- This WPT test may be referenced by the following Test IDs:
- /css/cssom/CSSRuleList-appendRule-keyframe-002-crash.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>CSSOM Test: Servo crash when modifying keyframe rules</title>
<style>@keyframes keyframe {}</style>
<script>
let rule = document.styleSheets[0].cssRules[0];
rule.appendRule("1% { }")
rule.cssRules[1];
</script>