[1.12.7] Crash while running event on_train_changed_state

[Jorn86]

Factorio version 0.18.15. We were playing multiplayer, 3 players connected. Let me know if you need more info.

Screenshot with stacktrace is attached

[Optera]

Factorio version 0.18.15. We were playing multiplayer, 3 players connected. Let me know if you need more info.

Always give all information listed here: viewtopic.php?f=214&t=60889

Especially what you where doing, so i can reproduce that error.

[Jorn86]

I wasn't doing anything LTN related at the time, just minding my own business when it crashed. I can't speak for the other players, but since the error happens in an event handler I doubt it's related to anything they did either.

We restarted the game and played for several more hours, and the crash didn't happen again. So I have no idea what caused it or how to reproduce it.

[Optera]

The error should only be possible if the first schedule entry when leaving a requester either has nil as stop name, or an invalid rail segment.
I don't see how that could happen in normal gameplay.

[Jorn86]

The stop names do have rich text (icons), but they all do so that should be fine. I guess it's possible someone was changing the station settings or signals at the time, but it'd be pretty hard to reproduce if it hat to be at that exact tick.

[Optera]

Even with a deliberate invalid temp stop on top of the schedule it doesn't crash.
Doesn't matter if it's the only stop beside the requester either.

2020-03-25-19-20-27-0754368.png (148.74 KiB) Viewed 2892 times

[Jorn86]

I'm not sure what else I can tell you beyond it happened But since it never happened again and won't be easy to reproduce, I guess we'll have to leave it be.