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https://bugs.webkit.org/show_bug.cgi?id=49693<br>
Ensure loads that go through our scheduler and are cancelled by willSendRequest() don't cause us to crash.
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.setWillSendRequestReturnsNull(true);
    }
    var img = new Image(1, 1);
    document.getElementsByTagName("body")[0].appendChild(img);
    img.src = "does-not-exist.html";
</script>
</body>
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