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chromium/third_party/blink/web_tests/storage/indexeddb/cursor-after-range-bug.html 

<!DOCTYPE html>
<title>IndexedDB: Reading cursor value after advancing past range</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/testharness-helpers.js"></script>
<script>

// A regression test for http://crbug.com/487711
indexeddb_test(
    function(t, db) {
        var store = db.createObjectStore('store');
        for (var i = 0; i < 10; ++i)
            store.put(i, i);
    },
    function(t, db) {
        var transaction = db.transaction('store', 'readonly', {durability: 'relaxed'});
        var store = transaction.objectStore('store');
        var req = store.openCursor();
        var last_cursor;
        req.onsuccess = t.step_func(function(evt) {
            var cursor = evt.target.result;
            if (cursor) {
                last_cursor = cursor;
                cursor.continue();
            } else {
                assert_equals(last_cursor.value, undefined);
                t.done();
            }
        });
        req.onerror = t.step_func(function() {
            assert_unreached('open should not fail');
        });
    },
    'Access to cursor value after final advance should be undefined'
);

</script>