From 7c3bd972e9fd077f366165f5740a9cea305a9c88 Mon Sep 17 00:00:00 2001
From: Antonio Ojea <aojea@redhat.com>
Date: Wed, 28 Oct 2020 09:05:29 +0100
Subject: [PATCH] fix unbound variable on upgrade

---
 cluster/gce/upgrade.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cluster/gce/upgrade.sh b/cluster/gce/upgrade.sh
index 01555e65908..1db0ea8b949 100755
--- a/cluster/gce/upgrade.sh
+++ b/cluster/gce/upgrade.sh
@@ -462,7 +462,9 @@ function update-coredns-config() {
 
   # clean up
   cleanup() {
-    rm -rf "${download_dir}"
+    if [ -n "${download_dir:-}" ]; then
+      rm -rf "${download_dir}"
+    fi
   }
   trap cleanup RETURN