Bug Report (Console all of a sudden gets spammed with "CUtlLinkedList overflow! (exhausted index range)" millions of times, causing extreme FPS loss.

[Illusion™]

Type of Bug: Map

Description of the Bug: Console all of a sudden gets spammed with "CUtlLinkedList overflow! (exhausted index range)" millions of times, causing extreme FPS loss. The only solution I have so far is to retry in console.

How to reproduce the Bug: This only seems to happen around PD. It happens randomly from what I can tell, but only after being on for a little bit (over ~45 minutes). After being on for a bit, if you walk around PD, it has a chance of happening. I have not been able to reproduce it in any other location other than near PD (like on the sidewalk outside PD or PD public parking lot).

Time Stamp: 8:57 PM EST on Jun 10, 2026.

Errors: CUtlLinkedList overflow! (exhausted index range)

Media: https://i.gyazo.com/70f0ba0368642566363f5d5bd0cd5bd4.png

Here it is happening on two occasions, about 15 minutes apart (I rejoined after the first one).

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LinkedList 2 - Clipped Garry's Mod with Medal.tv

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LinkedList 3 - Clipped Garry's Mod with Medal.tv

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[jams]

I have had this happen a couple times, unsure on cause, will update if I get it again with timestamp

 

[Ducko]

@Dahweeble also reported having this error
While it was active he said his game had horrible fps

 

[Dahweeble]

The error popped up for me 2 times in like 20 minutes however after deleting all cache in /Garry's Mod/cache I could play the rest of the day without getting it. It could be a possible fix or I was just lucky and it didn't happen again for no reason.

For me it has always happened when there has been a shootout and a lot of city employees show up. Could be a problem with the lights on the emergency vehicles maybe?

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[thehomelessdude]

I have experienced the same issue multiple times. It always happens when I go past the storage in the city, fps instantly drops to 3-6 and stays like that until I leave the area. After that it stays on steady 13-16 until i rejoin, when I had 60-70 before entering the storage area.

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[Creepis]

Does this only happen on the night map? Seeing as all the evidence posted here is from that map.

 

[Tilin]

Happened to me twice yesterday after seeing a police car for the first time. After that I kind of just gave up.

 

[Ducko]

The error popped up for me 2 times in like 20 minutes however after deleting all cache in /Garry's Mod/cache I could play the rest of the day without getting it. It could be a possible fix or I was just lucky and it didn't happen again for no reason.

For me it has always happened when there has been a shootout and a lot of city employees show up. Could be a problem with the lights on the emergency vehicles maybe?

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Peak driving on my part there too

 

[Dahweeble]

Does this only happen on the night map? Seeing as all the evidence posted here is from that map.

I believe this is the normal map, but at night. Couldn't actually see the clip because it was deleted. Emergency vehicles seems to be a common denominator at least.

 

[Illusion™]

Happened to me twice yesterday after seeing a police car for the first time. After that I kind of just gave up.

I confirmed today that this happens on both maps. It might not actually be a map issue, since I got it around city garage today. Here's the clip of that:

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I think looking into the emergency lights is a good first step.