callback not called in indexeddb_store.js

[terrycojones]

From line 389 in indexeddb_store.js:

        openRequest.onupgradeneeded = function(ev) {
            createStores(ev.target.result, reqIndexArray, self.metaStoreName);
            updated = true;
        };

If the above case happens, neither the callback nor the errback passed to open will be called.

I've not experienced this, but from just looking at the code it looks like it might be a bug. (If it's not, maybe a comment could explain why the callback/errback is not called.) What does update affect?