[0.15.?] Ghost underground items interfere with placed ones

[featherwinglove]

I haven't tried this myself yet (I don't find it all that important and wouldn't be too surprised to find it in "Won't Fix", but I'll try it next time I have time to update and play my 0.15 installation.) I found it in a Youtube LP, and rather to my surprise, advanced search reveals no trace that it is known.

Expected: Built UGB/UGP will connect with actual built UGB/UGP and not ghost blueprint variety.

Actual: Built UGB/UGP one end will attempt unsuccessfully to connect with ghost blueprint UGB/UGP end instead of the built end within range beyond the ghost. The UGB/UGP actually built will not function.

Reproduce: Shift-clicking a UGB/UGP end into the way of a functioning UGB/UGP should be enough to do it.

Discovered by KatherineOfSky: https://www.youtube.com/watch?v=nqDqQetPZbY&t=22m

The sharp-eyed might notice that there are gears sticking out of the eastern UGB end: that's because there are two versions of the print in her game (she calls it a mall), one for the early game and one for the later game. She had placed and built the early game version, and when she started to need more than it provided, she placed the later game version, which has those UGB ends one tile further west. Her AM1/AM2 line was functioning from the older version and knocked out of action by this problem when the later version was placed. This is likely a very old bug not noticed because the period in which it could be noticed when only bots built to blueprints is very short and even if observed, probably wouldn't be distinguished from the expected malfunctions of an unfinished blueprint build.

[posila]

Hi, thanks for the report.
However this is intended behavior programmed in 0.13 as fix for this problem: 22720
In most cases you really want ghosts to block underground belts to prevent some random connections happen before all ghost are built.

[featherwinglove]

...elsewhere it's numbered 1172.