[0.18.17] Vanilla desync when changing logistic request

[MJDSys]

I was playing Factorio tonight with a friend. They just added a logistic request for some items, when the game desync'ed. Everytime after that, as soon as they connected the game would immediately desync, no matter what I did with my player character (enabling/disabling logistics, moving around, disconnecting entirely, etc). I was only able to get the game to stop by deleting them from the server, removing all of their inventory/requests. Afterwards they were able to add logistic requests and we were able to continue as normal.

First desync: https://stuff.mjdsystems.ca/desync-repo ... -29-02.zip
Another desync after when they connected: https://stuff.mjdsystems.ca/desync-repo ... -34-52.zip

I imagine just connecting to this game as sanilogc21 will be enough to trigger the desync. It happens immediately on my server everytime.

TL;DR:
Steps taken before desync: Logistc request added by sanilogc21 player to character, and then everytime after they connect
Reproducible: Not so far, they were able to add logistic requests after being deleted.

[Windsinger]

Can confirm, we had 2 similar cases, (This time with 18.18)

Both they either added or changed their personal logistic request in the new GUI.

File1: https://mega.nz/file/D1ZDRIZJ#PxDg3WKJ5 ... 9okF-gO0dc
File2: https://mega.nz/file/K8A3mKDR#4Ii7OPfO9 ... h8kinYimWM

Same resolution, Deleted the char, afterwards it was all ok again.

Edit - Forgot to add, this was also with Vanilla map, no mods.

[Windsinger]

Similar reports ->

viewtopic.php?f=7&t=83238
viewtopic.php?f=7&t=82743

[Rseding91]

Do you know of any way to reproduce this desync from a "known working state"? Some series of steps to reproduce it from a new game?

[Windsinger]

I've been trying to read through the forums, reddit/discord to hear what people did that triggered and retried it many times or slight variantions of it. i was not able to trigger it myself unfortunately.

Last night it happened on our server 3 times during buildup of the the base, 3 different people client, once i deleted them it was fine.

Sidenote, after those de-syncs what we also noticed is that if we do

/p o
we say the people online correctly,

/admin
That list was totally wrong, only corrected itself after a server restart. (players online that were not there...)

Afterwards i've not heard any de-sync reports since. So not entirely sure where or how to pinpoint this.

[BulletToothJake]

I have 2 more desync reports from the same server WindSinger is referring to. One is from my player causing and one from when another player caused it. Both were while adding a logistic request. They are both about 122mb each.

[Rseding91]

Thanks for the report and the save files/desync files. With the help of Boskid it's now fixed for the next release.

[MJDSys]

Thanks for the report and the save files/desync files. With the help of Boskid it's now fixed for the next release.

Thanks Rseding91!