From 0d3a6e6d570374b46d3348a8953795452ef79aae Mon Sep 17 00:00:00 2001
From: Alex Anderson <raanderson@instructure.com>
Date: Fri, 31 Jan 2020 21:07:49 -0700
Subject: [PATCH] fix(Server): Fixes an issue where the server crashes
 regularly. Closes #2735

---
 server/processes/reactor.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/processes/reactor.js b/server/processes/reactor.js
index 00cf67b93..a4d5006f8 100644
--- a/server/processes/reactor.js
+++ b/server/processes/reactor.js
@@ -124,7 +124,7 @@ const updateReactor = () => {
           const simId = sim.id;
           let oldLevel = App.systems
             .filter(s => s.simulatorId === simId)
-            .filter(s => s.power.power)
+            .filter(s => s?.power?.power)
             .reduce((prev, sys) => {
               return sys.power.powerLevels.length > 0
                 ? prev + sys.power.power