<html>
<script>

let didLoad = false;
let didFinishTesting = false;

function load() {
    document.body.innerHTML = 'The test is declared pass if there is no crash observed.';
    didLoad =true;
    if (window.testRunner) {
        testRunner.dumpAsText();
        if(!didFinishTesting)
            testRunner.waitUntilDone();
    }
}

function didLoadFrame2() {
    iframe1.srcdoc = "x";
    didFinishTesting = true;
    if (window.testRunner && didLoad)
        testRunner.notifyDone();
}

</script>
<body onload="load()">
<iframe id="iframe1" src="data:text/html,foo">a</iframe>
<iframe id="iframe2" onload="didLoadFrame2()" srcdoc="y">