<!DOCTYPE html>
<html>
<body>
<p>This tests that WebKit doesn't crash when there is an non-flattened iframe inside a flattened iframe.</p>
<div id="container"></div>
<script>

if (window.testRunner && window.internals) {
    testRunner.dumpAsText();
    internals.settings.setFrameFlattening("FullyEnabled");
}

const container = document.getElementById('container');
const outerIFrame = document.createElement('iframe');
container.appendChild(outerIFrame);

const innerIFrame = document.createElement('iframe');
innerIFrame.setAttribute('scrolling', 'no');
innerIFrame.style.width = '100px';
innerIFrame.style.height = '100px';

outerIFrame.contentDocument.body.appendChild(innerIFrame);

let content = '';
for (let i = 0; i < 50; i++)
    content += `some text ${i}<br>`;

innerIFrame.contentDocument.body.innerHTML = content;

document.body.getBoundingClientRect();
container.textContent = 'PASS. WebKit did not crash.';

</script>
</body>
</html>