From 2aee491bf8ac27dd38aa45e308c2e3eb07e7b65d Mon Sep 17 00:00:00 2001
From: Maciej Borsz <maciejborsz@google.com>
Date: Wed, 19 Dec 2018 08:14:22 +0100
Subject: [PATCH] Fix detect_node_failures for gke

---
 cluster/log-dump/log-dump.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cluster/log-dump/log-dump.sh b/cluster/log-dump/log-dump.sh
index c74afe11b4b..634deadcd90 100755
--- a/cluster/log-dump/log-dump.sh
+++ b/cluster/log-dump/log-dump.sh
@@ -435,7 +435,7 @@ function detect_node_failures() {
   fi
 
   detect-node-names
-  if [ -z "$INSTANCE_GROUPS" ]; then
+  if [ -z "${INSTANCE_GROUPS:-}" ]; then
     return
   fi
   for group in "${INSTANCE_GROUPS[@]}"; do