[0.16.18] Crash during catch up after: "ManualBuilder::suitableBuildDirections"

[Sparen]

On a vanilla multiplayer server (Factorio MMO The Great Factory) I experienced two desyncs followed by the game freezing when attempting to catch up.

Desync report prior to crash and crash log attached.

macOS Sierra

[psihius]

I don't know if these desyncs are related or not, but we had desynced when we started the stream - all of us (sparen came in way later), so I'm posting my desync report and log too

[Rseding91]

Thanks for the report. I looked at the crash and I can't see how it's possible for it to crash at the place it did.

Unless it happens again I'm going to go with 0/1 magic.