Error reading from fake-indexeddb using where clause

[stutrek]

https://codesandbox.io/s/dexie-bug-tr8ml

This code sandbox will error with fake-indexeddb but succeed with regular indexedDB, toggle lines 15 and 16 to see it work. It happens with both 2.0.4 and 3.0.0-rc1. I don't know if the bug is in Dexie or fake-indexeddb, but I don't know how to reduce this to a simpler case to show to fake-indexeddb.

I found this while I was investigating my own code, where an anyOf(severalIds) would only get one per id, even when there were two for a specific id.

[stutrek]

It looks like this was unrelated.