[2.0.43] Crash editing blueprint (UndergroundBelt.cpp:1079: this->leftUndergroundLine->length == 1)

[quigonquinn0]

I was editing a BP, clicked on the button to select new contents. And the game crashed, with the pop-up letting me know I could report it here, and giving me access to the current log

It was not a big BP, 5 assemblers, 5 recyclers, and a handful of inserters, chests, belts, and modules.

Expected result was being able to select new contents for the BP, not crash

This is the first time this has happened.

No mods (aside from Wube official DLC)

[Rseding91]

Are you able to preproduce this crash? If so, do you know what steps are needed to do it?

[quigonquinn0]

I was unable to reproduce it. I reloaded my save and did the exact same series of actions (as close as I could get). And it worked fine.

[TriangleV]

Just encountered this in a heavily modded SE save. I've attached the save, it seems to crash ~25s after the save loads, every time.

No action required to trigger the bug, though it should be noted there is some belts (including undergrounds) being upgraded on Nauvis. Presumably the crash happens when the bots get round to interacting with the underground belt in question.