0.17.44 (pre-existing issue) - Bug - train carriages from blueprint in invalid positions

[SkiCarver]

Hi,

TL;DR

Ghost carriages from blueprint are appearing where their supporting track cannot be placed.

Detail

The blueprint includes train track on which train carriages are located. I have placed belt to prevent the train from being created every thing I stamp the blueprint down (to set assemblers due to tech).

The issue is, ghosts of the carriages which were on the (now invalid) track have been placed and bots are trying to place the carriages.

[kovarex]

What is the bug exactly?

If you forced-built blueprint in a way that rails were not built, but train was built, than the train is there.

[SkiCarver]

The blueprint contains rails where the map has belt - this means the rails cannot be built so the system knows not to place a ghost.
The blueprint contains carriages where there is belt and therefore no rail - this system should behave as it does for other items that cannot be placed - it should not place a ghost.

I consider that a bug ... If it is how it is intended to work, please explain the purpose, as I do not see why a ghost should appear that cannot be placed.

[kovarex]

The ghost train building just doesn't check the rail existence. Only when it is being materialised. This is as connection tho ghost rails isn't possible, and I don't see much value in adding more restrictions.

[SkiCarver]

I agree that this bug would be a low priority as it doesn't stop the game, it is merely an annoyance (wasted bots, graphically unsightly and generally unsatisfying) and, I suspect, a case that does not occur often. Perhaps a task if the blueprint validation is updated at some point.

[eradicator]

What is the bug exactly?

More of an inconsistency. If a blueprint only contains trains without rail they can only be placed on real rail. Can't even place them on ghost rail.

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