LayoutTests/http/tests/cache/recursive-validation.html

<script src="/js-test-resources/js-test-pre.js"></script>
<script>
jsTestIsAsync = true;

description("Test that recursively loading resource that requires validation does not assert or crash");

function load(completion) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', "resources/no-cache-with-validation.py");
    xhr.onload = completion;
    xhr.send();
}

window.onload = load(function () {
    load(function () {
        load(function () {
            load(function () {
                 finishJSTest();
            });
        });
    });
});
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<script src="/js-test-resources/js-test-post.js"></script>