Excavator gets confused. Solved by re-painting leveling designation.

Issue description

Excavator gets stuck, taking no action while cycling through various statuses (Loading cargo, Searching for a valid terrain designation, Driving to destination). Re-painting the leveling designation (not sure if it can occur with a mining designation) over the existing one solves the issue.

I mentioned this in a comment in Leveling designation not working properly, dumping and digging fail at times, but after observing it several more times I'm putting it in its own issue. (See there for an additional save file showing the issue.)

Expected behavior

Excavator should continue working normally. Re-applying a designation without changing the type/level/contour shouldn't ever have any effect.

Reproduction steps

1. Load the attached save.
2. Click the excavator to see the status cycling.
3. Press N
4. Drag along the existing designation to re-apply it.
5. Observe: excavator resumes operation.

Game version

0.5.1 (200)
0.5.1a (202)

Attachments

excavator-bug.save

Files not imported: excavator-bug.save

Thanks for the report and save file, this was fixed in v0.5.1a.

Encountered the issue again, on 0.5.1a. With a mining designation this time. Re-painting the mining designation doesn't solve it. Painting a leveling designation over the top fixes it; switching back to mining designation immediately causes the problem again. (After letting it mine a couple scoops with leveling designation, switching back to mining is fine.)

excavator-bug-continues.save

Files not imported: excavator-bug-continues.save