From c14353ddad8c951c93aa491f04b5dd244bc6202e Mon Sep 17 00:00:00 2001
From: Connor Adams <connorads@users.noreply.github.com>
Date: Tue, 28 Jul 2020 00:21:01 +0100
Subject: [PATCH] Handle undefined values when resolving Fn::Join in
 environment variables

---
 src/utils/resolveJoins.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/utils/resolveJoins.js b/src/utils/resolveJoins.js
index 8b81b39f1..f04bc2e3d 100644
--- a/src/utils/resolveJoins.js
+++ b/src/utils/resolveJoins.js
@@ -8,6 +8,10 @@ export default function resolveJoins(environment) {
 
   Object.keys(environment).forEach((key) => {
     const value = environment[key]
+    if (!value) {
+      return
+    }
+
     const joinArray = value['Fn::Join']
     const isJoin = Boolean(joinArray)