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<!DOCTYPE html>
<title>CSS Animations: Crash when using neutral keyframes and a var()-cycle (registered)</title>
<style>
@property --x {
syntax: "<number>";
initial-value: 0;
inherits: false;
}
#test {
animation: anim 1s;
}
@keyframes anim {
to {
--x: var(--x);
}
}
</style>
<div id="test">PASS if no crash</div>