From ca6dee493eed4320321c9edd0b81a7e5667e1ea2 Mon Sep 17 00:00:00 2001
From: skull132 <skull132@users.noreply.github.com>
Date: Wed, 23 Nov 2016 22:47:22 +0200
Subject: [PATCH] Fix Mecha Runtimes (#1179)

Consistently spammed these for 8+ hours today.

No thank you.

Remember kids, safety checking a variable before assuming it can be used is important.
---
 code/game/mecha/mecha.dm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/code/game/mecha/mecha.dm b/code/game/mecha/mecha.dm
index 4dbc871cc98..7a4df64ac2f 100644
--- a/code/game/mecha/mecha.dm
+++ b/code/game/mecha/mecha.dm
@@ -1452,7 +1452,7 @@
 						<b>Powercell charge: </b>[isnull(cell_charge)?"No powercell installed":"[cell.percent()]%"]<br>
 						<b>Air source: </b>[use_internal_tank?"Internal Airtank":"Environment"]<br>
 						<b>Airtank pressure: </b>[tank_pressure]kPa<br>
-						<b>Airtank temperature: </b>[tank_temperature]K|[tank_temperature - T0C]&deg;C<br>
+						<b>Airtank temperature: </b>[isnum(tank_temperature) ? "[tank_temperature]K|[tank_temperature - T0C]&deg;C" : "Unknown"]<br>
 						<b>Cabin pressure: </b>[cabin_pressure>WARNING_HIGH_PRESSURE ? "<font color='red'>[cabin_pressure]</font>": cabin_pressure]kPa<br>
 						<b>Cabin temperature: </b> [return_temperature()]K|[return_temperature() - T0C]&deg;C<br>
 						<b>Lights: </b>[lights?"on":"off"]<br>
@@ -1985,7 +1985,9 @@
 
 
 	process(var/obj/mecha/mecha)
-		if (!mecha)
+		// No cell will kill warnings.
+		// Makes sense, caution systems are battery powered.
+		if (!mecha || !mecha.cell)
 			return
 
 		if (!mecha.power_alert_status && mecha.cell)//If we're in the fine status