[Raiguard] [1.1.69] Ghosting belts drags smart belt undergrounds through empty space

[Zaspar]

This bug is very easy to replicate. Just copy what I do in the video and it will give you an underground through empty space for no reason. Happened to me while speedrunning and I have attached the save of the finished run here. Let me know if any more info about the bug is needed.


https://streamable.com/1gdnqw

[raiguard]

The video is no longer viewable. Do you remember what the issue was / can you still reproduce it?

[Zaspar]

Hi Raiguard, thanks for the response and sorry for the video being unavailable now, and for not explaining the bug in text. The steps to reproduce were:
Enable the setting to allow q picking a ghost of an item when you have none of the item in your inventory
Place 1 tile of red belt somewhere
Empty your inventory of red belt
Build a straight line of 20 or so yellow belt
Use the upgrade planner to mark the yellow belt to be upgraded to red
Q pick the red belt (to obtain a red belt ghost)
Drag the ghost red belt over the upgrade planned yellow belt in the same direction
The result will be ghosted red underground belts.

This was written from memory of the bug from when I first experienced it 2.5 years ago so might be slightly inaccurate. I will be able to double check that these steps reproduce the bug on Monday. Can also check if the same bug exists in 2.0

[Zaspar]

After some more experimentation, the bug only occurs when in the last step, you drag from close to the 'tip' of the placed yellow belt forward. The ghost underground only spawns if you drag from within the max length of 1 red underground of the end of the existing belt. Also, the bug still exists in 2.0.43 in exactly the same way.

[Zaspar]

If there is any confusion I can post a new video.