Too many spiders, too maaaany spiders

[Musteval]

Describe the bug

I was sitting in my home base on experimental when I saw something tunnelling across the road. I went over to investigate, figuring it was a worm, but it turned out to be 20-30 giant trapdoor spiders, which appeared one by one and murdered me. I asked in Discord and it sounds like this isn't supposed to happen - feel free to close if this is actually a feature, but I didn't see anything in the code or commit history that looked like it was supposed to cause this.

I tried to make myself invincible so I could figure out what was going on, but I guess the "invincibility" mutation doesn't stop you from bleeding out, so I died before I was able to see if there was some kind of worm casting the "summon trapdoor spiders" spell or if it was just the spiders by themselves. I have "delete world on death" enabled so I don't have a savefile either, sorry!

Steps to reproduce

Don't know how to repro.

Expected behavior

30 spiders don't show up in my home base out of nowhere.

Screenshots

No response

Versions and configuration

• OS: Windows
  • OS Version: 10.0 2009
• Game Version: e27abe9 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  sees-player, run, crouch, bleed icons, retrodays [sees_player_retro],
  Stats Through Kills [stats_through_kills]
  ]

Additional context

No response

[NetSysFire]

First of all, the thing you have encountered is a trapdoor spider den. Those things are very dangerous. You can reproduce it by debug spawning the trapdoor spider map extra (mx_Trapdoor_spider_den, debug menu -> map -> spawn map extra).

Make yourself invincible but not invisible and walk into the den.

[LeahLuong]

I've yet to encounter this critter but that sounds like strange behavior. Real trapdoor spiders do create a burrow but aren't really known for tunneling underground to catch their prey; they leap out of their burrow when they sense vibration or see them from the trapdoor.

It would also be strange if something was casting trapdoor spider summoning spells when you don't list a mod that has those AFAIK.

Nice "bug" report.

[Night-Pryanik]

@LeahLuong this map extra is from vanilla.

[NetSysFire]

One thing I can imagine without diving into the code is a similar issue the eyebots had when they could infinitely summoned police bots. Trapdoor spiders might be able to infinitely spawn more of them.

[oosyrag]

The spiders don't spawn more spiders. The traps spawn one spider upon getting triggered. The range is 4, so if the spawned spiders can trigger the traps themselves, there is a non zero possibility the entire spider den gets triggered. The spider den map extra contains 28 eggs. Possible wild animal(s) wandered into the tile and lured them over?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. Please do not 'bump' or comment on this issue unless you are actively working on it. Stale issues, and stale issues that are closed are still considered.

[Night-Pryanik]

Closing as stale, since stalebot can't do it by itself.