<!DOCTYPE html>
<html>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
<body>
    <input style="width:0; height:0" type="checkbox">
    <input style="width:0; height:0" type="checkbox" checked>
    <input style="width:1px; height:1px;" type="checkbox">
    <input style="width:1px; height:1px;" type="checkbox" checked>
    Test passes if it does not crash.
</body>
</html>