From 582e31efc418ba39d73f63d03eba72b964dde8a0 Mon Sep 17 00:00:00 2001
From: SmArtKar <44720187+SmArtKar@users.noreply.github.com>
Date: Sun, 4 Jan 2026 06:56:10 +0100
Subject: [PATCH] Adds some safeties to ensure that hotspots don't cause an
 infinite infectious runtime and crash clients (#94698)

## About The Pull Request

Not 100% sure, but somehow we ended up with a missing hot group on Terry
which caused newer hotspots to runtime and not get theirs which caused
more hotspots- you get it.
Only idea I have is that possibly we could've gotten a hard delete, but
there are none in the logs? This should solve the infinite hotspot
runtimes at the very least, and possibly? prevent harddels by changing
the nullcheck to a qdel check.

## Changelog
:cl:
fix: Added some safeties to ensure that hotspots don't cause an infinite
infectious runtime and crash clients
/:cl:
---
 code/modules/atmospherics/environmental/LINDA_fire.dm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/code/modules/atmospherics/environmental/LINDA_fire.dm b/code/modules/atmospherics/environmental/LINDA_fire.dm
index 96938483b54..6a82fe99ed5 100644
--- a/code/modules/atmospherics/environmental/LINDA_fire.dm
+++ b/code/modules/atmospherics/environmental/LINDA_fire.dm
@@ -115,12 +115,15 @@
 		if(!to_check.active_hotspot)
 			continue
 		var/obj/effect/hotspot/enemy_spot = to_check.active_hotspot
+		// Safeguard to prevent infectious init runtimes for hotspots if we somehow end up with a hotspot without a group
+		if(!enemy_spot.our_hot_group)
+			continue
 		if(!our_hot_group)
 			enemy_spot.our_hot_group.add_to_group(src)
-		else if(our_hot_group != enemy_spot.our_hot_group && enemy_spot.our_hot_group) //if we belongs to a hot group from prior loop and we encounter another hot spot with a group then we merge
+		else if(our_hot_group != enemy_spot.our_hot_group) //if we belongs to a hot group from prior loop and we encounter another hot spot with a group then we merge
 			our_hot_group.merge_hot_groups(enemy_spot.our_hot_group)
 
-	if(!our_hot_group)//if after loop through all the adjacents turfs and we havent belong to a group yet, make our own
+	if(QDELETED(our_hot_group))//if after loop through all the adjacents turfs and we havent belong to a group yet, make our own
 		our_hot_group = new
 		our_hot_group.add_to_group(src)