LayoutTests/fast/css/cssom-border-image-width-crash.html

<style>
 div { border-image-width: auto; }
</style>
<script>
window.testRunner?.dumpAsText();

const div = document.createElement('div');
document.documentElement.appendChild(div);
div.attributeStyleMap.set('accent-color', div.computedStyleMap().get('border-image-width'));
</script>
This test passes if it doesn't crash.