From ebf2181074521d4dfd6756f60c06da25dd5564e4 Mon Sep 17 00:00:00 2001
From: Ryll Ryll <3589655+Ryll-Ryll@users.noreply.github.com>
Date: Tue, 8 Feb 2022 07:34:35 -0500
Subject: [PATCH] Fixes ashwalker lung runtimes on runtimestation (#64707)

I've been getting this error every time I launch a local server on runtimestation with LOWMEMORYMODE for months and months now from one of the ashwalker dummies. I'm now finally getting around to fixing it so I don't have to see this same damn error all the time.
---
 code/modules/surgery/organs/lungs.dm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/code/modules/surgery/organs/lungs.dm b/code/modules/surgery/organs/lungs.dm
index 76a002bc40d..c3e1ae6949d 100644
--- a/code/modules/surgery/organs/lungs.dm
+++ b/code/modules/surgery/organs/lungs.dm
@@ -585,6 +585,10 @@
 	. = ..()
 
 	var/datum/gas_mixture/immutable/planetary/mix = SSair.planetary[LAVALAND_DEFAULT_ATMOS]
+
+	if(!mix?.total_moles()) // this typically means we didn't load lavaland, like if we're using #define LOWMEMORYMODE
+		return
+
 	// Take a "breath" of the air
 	var/datum/gas_mixture/breath = mix.remove(mix.total_moles() * BREATH_PERCENTAGE)