[2.1.11] Biter expansions still sometimes generate worms only

Things that has been reported already before.
Gameboyaac
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[2.1.11] Biter expansions still sometimes generate worms only

Post by Gameboyaac »

I vaguely remember seeing this as patched, but apparently not. Biters still sometimes generate worm only bases on expanding. Suggested fix: walk without rhythm as to not attract the worms.
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Worm only base:
Worm only base:
worms.jpg (1.23 MiB) Viewed 1231 times
TheDash
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by TheDash »

I too have noticed and found this quite irksome on 2.0.77
eugenekay
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by eugenekay »

134800 is still "Pending"
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Klonan
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by Klonan »

Gameboyaac wrote: Wed Jul 15, 2026 3:48 pm I vaguely remember seeing this as patched, but apparently not. Biters still sometimes generate worm only bases on expanding. Suggested fix: walk without rhythm as to not attract the worms.
Hello, thanks for the report,

Can you provide a save game?
Ideally one with the base and one before the expansion happened?
Gameboyaac
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by Gameboyaac »

Klonan wrote: Wed Jul 15, 2026 6:20 pm
Gameboyaac wrote: Wed Jul 15, 2026 3:48 pm I vaguely remember seeing this as patched, but apparently not. Biters still sometimes generate worm only bases on expanding. Suggested fix: walk without rhythm as to not attract the worms.
Hello, thanks for the report,

Can you provide a save game?
Ideally one with the base and one before the expansion happened?

I can provide 2 saves, my most recent and one on the day it occurred, although the nest is already cleared unfortunately. I've marked where the base was in the attached screenshot:
Attachments
Where the base WAS
Where the base WAS
Screenshot 2026-07-17 125607.png (109.58 KiB) Viewed 1022 times
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Klonan
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by Klonan »

Gameboyaac wrote: Fri Jul 17, 2026 4:05 pm I can provide 2 saves, my most recent and one on the day it occurred, although the nest is already cleared unfortunately. I've marked where the base was in the attached screenshot:
They still can be helpful, please upload them here and I can check them
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by kjagodka »

Discovered worms only expansion in my game in version 2.1.12.
World was created in version 2.1.7 with default settings but I was playing on 2.1.12 when worms occured.
Worms spawned next to iron ore just outside southernmost wall.
There is 2.5h gap between those saves, I have no idea, when did worms spawn.
Attachments
_autosave2.zip
first save with worms expansion present
(14.46 MiB) Downloaded 26 times
2.1.zip
latest save before worms expanded
(14.17 MiB) Downloaded 27 times
factorio-current.log
(13.79 KiB) Downloaded 23 times
heyqule
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by heyqule »

That's because the builder group happened to select only spitters.

Larger sized spitter can only build worms, meanwhile larger sized biters can only build spawners.

If the build group only contains biters, it would spawn only spawners without worms.
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Klonan
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Re: [2.1.11] Biter expansions still sometimes generate worms only

Post by Klonan »

This is fixed for the next release, more info here:
134800
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