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chromium
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chromium/third_party/blink/web_tests/http/tests/cachestorage/detached-context-match.html 

<body>
PASS if no crash.
<iframe id="i"></iframe>
<script>
if (window.testRunner)
  testRunner.dumpAsText();

var cache = i.contentWindow.caches;
i.remove();
cache.match("/");
</script>
</body>