<!DOCTYPE html>
<html>
<head>
<style>
:last-child {
    all: initial;
}
</style>
<script>
if (window.testRunner)
    testRunner.dumpAsText();

onload = () => {
    let n0 = document.createElement('div');
    document.documentElement.appendChild(n0);
    n0.appendChild(document.createElement('input'));
    let n1 = document.createElement('input');
    document.documentElement.appendChild(n1);
    getSelection().selectAllChildren(n0);
    document.execCommand('Copy');
    document.designMode = 'on';
    document.execCommand('PasteAsQuotation');
    getSelection().extend(n1);
    document.execCommand('Paste');
};
</script>
</head>
<body>
This test passes if WebKit does not crash. PASS
</body>
</html>