From 520464e89b2e9b5fdea33be6864d52e2107680cc Mon Sep 17 00:00:00 2001
From: Vera Aguilera Puerto <6766154+Zumorica@users.noreply.github.com>
Date: Fri, 8 Jul 2022 12:41:59 +0200
Subject: [PATCH] FixVacuum does not replace tile air if there are no adjacent
 tiles. (#9535)

---
 .../EntitySystems/AtmosphereSystem.GridAtmosphere.cs      | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Content.Server/Atmos/EntitySystems/AtmosphereSystem.GridAtmosphere.cs b/Content.Server/Atmos/EntitySystems/AtmosphereSystem.GridAtmosphere.cs
index 69d42186e5..a8c5103b49 100644
--- a/Content.Server/Atmos/EntitySystems/AtmosphereSystem.GridAtmosphere.cs
+++ b/Content.Server/Atmos/EntitySystems/AtmosphereSystem.GridAtmosphere.cs
@@ -440,6 +440,10 @@ public sealed partial class AtmosphereSystem
 
         var adjacent = adjEv.Result!.ToArray();
 
+        // Return early, let's not cause any funny NaNs or needless vacuums.
+        if (adjacent.Length == 0)
+            return;
+
         tile.Air = new GasMixture
         {
             Volume = GetVolumeForTiles(mapGridComp.Grid, 1),
@@ -449,10 +453,6 @@ public sealed partial class AtmosphereSystem
         tile.MolesArchived = new float[Atmospherics.AdjustedNumberOfGases];
         tile.ArchivedCycle = 0;
 
-        // Return early, let's not cause any funny NaNs.
-        if (adjacent.Length == 0)
-            return;
-
         var ratio = 1f / adjacent.Length;
         var totalTemperature = 0f;