I gave up trying to re-produce the different effects and just changed to switch between an entity and a rendered animation to get the desired effect.

In 0.16 a trivial smoke with a duration and frame_count of 1 would be present for 1 tick. If you created it via command with the game speed of 0 in map editor it appeared on the 1 tick forward movement from the command and then when you moved on 1 tick it would vanish. In 0.17 a duration & frame_cou...

thanks, corrected. value of 0 is what causes the crash.

from antidotal experience this seems to be related to the selection boxes, as if I make them smaller the crash doesn't occur.

If you set RollingStock's wheel's direction_count to 0 the game crashes when you hover the RollingStock over a railway track and the game tries to draw the wheels. https://wiki.factorio.com/Prototype/RollingStock#wheels https://wiki.factorio.com/Types/RotatedSprite#direction_count data.lua code used...

I was placing some modified locamotives and cargo wagons in editor mode and the game crashed. They were being placed in a line using the auto connect placement feature. I placed into a train from front heading backwards a loco, wagon and clicked to place a second loco when it happened. I saw the 2nd...

If you mix railway carriages with different connection distances the separation distance is based on their facing to each other. If they are both facing the same direction then the leading carriage applies its connection distance and the trailing carriage value is ignored. If the direction of the ca...

If you create and destroy a lot of unit groups this can cause a desync in heavy mode. In a clean 0.17.74 vanilla game. Enable heavy mode (toggle-heavy-mode) Run the below script a few times (up to 5) and a desync will be reported. /c global.groups = global.groups or {} local surface = game.player.su...

I wondered (not tested) if this behaviour would increase UPS usage through unit command state changes, pathing requests to flee and then return when next triggered, ect. I.e. multiple waves hitting turrets sorrounded by wall. Would take small biters a while to chew through the wall layers and thus t...

Noticed a strange thing when testing new biter behaviour post 0.17.70. If I make a large horde of small biters (50ish) and attract them to my player they close in on me and after a few seconds of being really compact they shoot off away from me to just wonder around. The player is wearing lots of sh...

While catching up to an MP game if I press escape to get to the in-game menu, the save and pause buttons do nothing when clicked. I see the click animation on them, but no outcome. I think the buttons should be either disabled or have a popup notice like the Mod Settings button does when used in thi...

I know this is stretching it a bit, but though at least this way you get an explanation of what happened for the auto submitted crash log. Desynced in an MP game and while it was processing the desync to get the server's map copy for inclusion in the desync report I clicked the close button "X" on m...

When a desync has occurred and the client starts to download the map again they can not reach the menu by pressing escape. Effectively trapping you in the game until the map has re-downloaded and the desync report generated. On slower internet or very large maps this can take a long time. It seems t...

Further to the discord discussion earlier. I've just tried running this save on a headless windows install of 0.17.62 on a secondary pc in my house. I can reproduce the server crash when the autosave runs after I connect to the server with my main pc. The attached save should skip basically all of t...

is the variation in serialisation expected/accepted or is it a bug?

When I try to load the attached save after disabling all but one of the mods the save previously had, the game crashes. Done it twice in succession to confirm. Full mod folder including disabled mods included for completeness. I was doing this to try and quickly identify which mod was causing oddnes...

When I look at a desync report I've noticed that for a non broken mod there is variation in the reference and desynced script.dat files. It looks to be a serialisation variation that I don't recall ever noticing in older Factorio versions (early 0.17 or maybe 0.16). Not sure if it matters but the se...

When an MP server running "_autosave2" attempts to make the next auto save the server crashes with the attached errors. The autosave interval is 11 minutes. I have tried loading the server again from a copy of "_autosave2" and the game crashed with the same error on first autosave attempt. However, ...

this bug does see to have gone a bit off track. It was meant to highlight how the biters are prone to getting stuck on cliffs and likely other indestructible path blocking elements. And then they seemed to just give up after a while. If this is "accepted/expected" behaviour from the current mechanic...

yea you are correct. I redid the events fresh and I hadn't unticked the logistic network "Connect". Funny as a few experienced "smarts" people ingame looked at it and couldn't work out what was up either.