<!DOCTYPE html>
<html>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    internals.settings.setCSSVariablesEnabled(true);
}
</script>
<style>
#foo {
  -webkit-var-var23: -webkit-calc(0vw);
}
</style>
This test is successful if it does not crash.
</html>