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chromium/third_party/blink/web_tests/media/video-preload-none-to-metadata-after-load-crash.html 

<!DOCTYPE html>
<title>Setting preload=metadata after calling load() w/ preload=none</title>
<p>PASS if no crash in Debug.</p>
<script>
if (window.testRunner)
  testRunner.dumpAsText();

var video = document.createElement('video');
video.preload = "none";
video.src = 'content/test.ogv';
video.load();
video.preload = "metadata";
</script>