[0.16.4] Items not moving on belts REOPENED

[staviq]

I have just noticed there is a point in my factory where items are not moving on a single belt past this one point.

I can hop on the belt and it will carry me past this point so the segments are for sure in the correct direction, items hovewer are standing still.

I does not show well on screenshot, but there it is, the copper/coal, first to the right of the character:

[staviq]

I have restarted the game, and after a coupe of seconds the copper portion of the belt started moving, but the coal side stayed still for good 30 seconds:

Only one side of belt moving:



EDIT:

This state seems reproducible, after i load the game save, it takes a bit of delay for the copper side to start moving, about 3s, and much longer for the coal side, about 25s.

EDIT 2:

It happened again, iron plate belt on the bottom left:



It might be worth noting, i can manually onstuck the belt by "Z"dropping an item on the belt segment where it's stuck, but only on the stuck side, the other side works normally.

I have suspected the "Picker extended", because it has done some weird thing with belt placement yesterday, but i have disabled it and this still happens.

[staviq]

I have tried to find a way to reproduce and not only i got to reproduce, but i crashed the game.

Generally it goes like this:
1. have a belt fully compressed, with nothing at the end.
2. at the end, using copy tool from "cut and paste tools" mod, copy a belt lane coupe peices long, paste it at the end of the existing belt.
3. have robots build it from the ghost ( i used nanobots )
4. belt is stuck like i have described in the original post.

game crashing part:

5. remove the part of the belt lane you have copy pasted, leaving the original beclt from 1. instact.
6. take a belt piece from your inventory
7. place a single ghost at the end of belt, do not let bots build it
8. remove the ghost, have crashes.

Edit:
Debug view of a stuck belt:

[staviq]

Another crash trying to remove shown piece of belt:

[Loewchen]

The crash is handled here: viewtopic.php?f=7&t=55082

[staviq]

Stuck belts appear to be fixed in 0.16.5.
Also game saves that previously resulted in belt being stuck after loading the save, now immadietly show correct state of the belts.

I do not know about the crash issue itself, but i'm not able to reproduce condidtions leading to the crash like before, so the initial problem appears to be solved.


Thanks a lot! You guys are the best!

[posila]

Thanks for the reports.

I tried to reproduce the crash using your instructions in 0.16.4, but didn't managed to make it crash for me.
Given there were no reports of this crash in 0.16.5 or 0.16.6, I suspect it was related to bug in force-building ghosts

Fixed that forced ghost building (shift + click) didn't work correctly.

Please, let me know if it happens again in 0.16.6 or newer.

[staviq]

Thanks for the reports.

I tried to reproduce the crash using your instructions in 0.16.4, but didn't managed to make it crash for me.
Given there were no reports of this crash in 0.16.5 or 0.16.6, I suspect it was related to bug in force-building ghosts

Fixed that forced ghost building (shift + click) didn't work correctly.

Please, let me know if it happens again in 0.16.6 or newer.

Hi, the issuecame back in 0.16.11 ( i think )
I finished my game today and started again, with bob's mods this time.

Can't exactly say in which update the issue came back because i haven't buid any belts since about 0.16.8/9.

I'm at the very beginning of the game, and the exact same problem is happening again,

I tried to ignore it for a while, but it now crashed the game.

I'll try to reproduce and let you know.

[staviq]

Steps to reproduce using attached save file:

https://youtu.be/cLLHYxdHw6c ( just uploaded, give youtube a couple of hours to unfuck the resolution, it's recorded in 1080p )

[staviq]

Similar context, diffrent crash,

The exact moment bot tried to place splitter over the ghost made by cut and paste mod blueprint.



At this point im almost certain the problem is triggered by the blueprints the cut and paste mod makes.

[staviq]

I have done some testing and have noticed as follows:

1. With this save, i can crash the game every time.
2. It does not matter which belt i do this with, it does seem hovewer, like the belt must be full at the end.
3. Fresh game, sandbox, enabled cheat mode, spawned player and recreated the situation with a chest full of iron plates, loader unloading to a yellow belt about 10 segments long, wait until the belt gets full, try to reproduce, nothing happens, game works as intended.

This one is very important:

4. Fresh save as above, recreated the situation, and then i have unlearned all the research, game crashes when i try to reproduce.

also

5. Rollback to 0.16.10 problem can be reproduced.

Edit:

6. Rollback to 0.16.9, problem with belts still reproducible, game did not crash hovewer.
7. Rollback to 0.16.8, problem reproducible, game did crash.
8. Rollback to 0.16.7, problem with belts reproducible, no crash ( it seems to me like the problem is the same in every version, it's just that sometimes process jumps into memory out of bounds and sometime it isn't, but it's a invalid address every time. Just a guess. )
9. Rollback to 0.16.6, problem reproducible, game did crash.
10. Rollback to 0.16.5, problem reproducible, game did crash.
11. Rollback to 0.16.4, problem reproducible, game did crash.

I have confirmed with 0.16.4, that the problem only occurs early when not many of the technologies are researched.

It seems like the problem was never fixed, i just have progressed my game enough so the problem was not reproducible.

[staviq]

Confirmed to also be reproducible in 0.16.12 on OSX resulting in SIGSEGV.

You got a rogue pointer on the run, boys

[staviq]

Same problem, using cut and paste, on stone walls:



Note the wall segment next to the player, it was copied before and placed by bots, it's not connected to the rest of the wall when it should be.

[staviq]

There is nother mod called "CutAndCopyBlueprint" that implements the same functionality, and it does not cause this problem.

So it looks like the crash is caused by how this specific mod creates it's temporary blueprints: https://mods.factorio.com/mods/mickael9/cut-and-paste

Just to make sure it's not corrupted, i have redownloaded the mod, changed "factorio_version" to 0.16 and added icon_size whenever nescesary, and it's still doing the same weirdness.

[Rseding91]

Can whoever is having issues please make a new bug report? The original report for this topic was items not moving on belts and now people are talking about crashes when robots build belts.

[staviq]

Can whoever is having issues please make a new bug report? The original report for this topic was items not moving on belts and now people are talking about crashes when robots build belts.

It's my bug report, i can make a separate one but what would you want mo to title it ? It all the same issue, just manifesting in diffrent ways, and it just took a while to put together.

Right now there seems to be only one issue, it is possible to place a ghost, trough a mod, that when placed by bots creates on the map an item, that is not behaving like a normally placed item. Upon attempting to interact ( mine or build an item next to ) those items, game eperiences invalid pointer that most of the time craseh the game.

That is the best summary i'm able to come with rignt now.