From 173f9659d72b8bc46e701191cd4f3634e33f0d6e Mon Sep 17 00:00:00 2001
From: Chai Feng <chaifeng@chaifeng.com>
Date: Wed, 12 Aug 2020 13:31:27 +0800
Subject: [PATCH] Fix a variable undefined error

---
 ufw-docker | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ufw-docker b/ufw-docker
index c1673de..8a93550 100755
--- a/ufw-docker
+++ b/ufw-docker
@@ -276,7 +276,7 @@ function rm-on-exit() {
 }
 
 function on-exit() {
-  for file in "${files_to_be_deleted[@]}"; do
+  for file in "${files_to_be_deleted[@]:-}"; do
     [[ -f "$file" ]] && rm -r "$file"
   done
   files_to_be_deleted=()