<!DOCTYPE html>
<script>
if (window.testRunner) {
    testRunner.dumpAsText()
    testRunner.waitUntilDone();
    window.addEventListener("load", function() {
        testRunner.notifyDone();
    });
}
</script>
<link id=link rel=preload href="../resources/dummy.js" as=fetch>
<body>
Test that restarting link preload doesn't assert or crash.
</body>
<script>
link.setAttribute("rel", "preload");
</script>