From 2aded7dd552ee71455167287e2fec1d46023c3ca Mon Sep 17 00:00:00 2001
From: Brian Egizi <begizi@google.com>
Date: Fri, 21 May 2021 00:50:21 +0000
Subject: [PATCH] Fix unbound variable in kzip script

Change-Id: Id7f81677389cb853da064a43f1d5d54b2271f0c0
---
 build_kzip.bash | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build_kzip.bash b/build_kzip.bash
index 786ff7656..56550677f 100755
--- a/build_kzip.bash
+++ b/build_kzip.bash
@@ -18,7 +18,7 @@
 
 # If the SUPERPROJECT_REVISION is defined as a sha, use this as the default value if no
 # SUPERPROJECT_SHA is specified.
-if [[ $SUPERPROJECT_REVISION =~ [0-9a-f]{40} ]]; then
+if [[ ${SUPERPROJECT_REVISION:-} =~ [0-9a-f]{40} ]]; then
   : ${KZIP_NAME:=${SUPERPROJECT_REVISION:-}}
 fi