From 3c4f7491c917ebb9fff57b63104c77b2631c6c74 Mon Sep 17 00:00:00 2001
From: David McMahon <djmm@google.com>
Date: Fri, 19 Aug 2016 13:46:00 -0700
Subject: [PATCH] Fix unbound variable issue (set -e).

---
 hack/jenkins/build.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hack/jenkins/build.sh b/hack/jenkins/build.sh
index 6a7f2481762..ad340715417 100755
--- a/hack/jenkins/build.sh
+++ b/hack/jenkins/build.sh
@@ -79,8 +79,8 @@ elif ${RELEASE_INFRA_PUSH-}; then
     exit 1
   fi
 
-  [[ -n "$KUBE_GCS_RELEASE_BUCKET" ]] \
-   && bucket_flag="--bucket=$KUBE_GCS_RELEASE_BUCKET"
+  [[ -n "${KUBE_GCS_RELEASE_BUCKET-}" ]] \
+   && bucket_flag="--bucket=${KUBE_GCS_RELEASE_BUCKET-}"
   ${FEDERATION} && federation_flag="--federation"
   ${SET_NOMOCK_FLAG} && mock_flag="--nomock"
   ${release_infra_clone}/push-ci-build.sh ${bucket_flag-} ${federation_flag-} \