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Test Info:
- Manifest: layout/style/crashtests/crashtests.list
<!doctype html>
<style>
div::first-line {
color: yellow:
}
.foo span {
display: none;
}
.foo::first-line {
color: red;
}
</style>
<div><span>Yo, I'm a first-line<span> really</span></span>
<script>
document.body.offsetTop;
document.querySelector('div').classList.add('foo');
</script>