Periodic crash in flights

[ericberman]

It's in this code in _logbookTableContents.cshrml:

                string szExpandoID = String.Format(CultureInfo.InvariantCulture, "expando{0}", led.FlightID);
                Aircraft ac = ua[led.AircraftID];
                if (ac.AircraftImages.Count == 0)
                {
                    ac.PopulateImages();
                }

Looks like ac can be null (!) Why would this ever happen? Flushing the cache solves it, so there's some sort of cache miss that's not being fixed?

[ericberman]

Repro steps:

• Add an aircraft to your account that has multiple versions
• View your flights. This populates the flightresults cache. Be sure this include a page with the flight in that aircraft
• View the aircraft and click 'My Flights are in this aircraft" next to the alternate version
• View your flights (same page) => BOOM! The useraircraft list is flushed so is accurate, but the flight cache is still referencing the old aircraft, so it's missing in the aircraft lookup