From 93fc5feeb2d7fa034d610404755b5d3f9107aec2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?No=C3=A9=20Rubinstein?= <noe.rubinstein@gmail.com>
Date: Thu, 25 Dec 2025 13:52:14 +0100
Subject: [PATCH] Handle unset env var checks safely

---
 update-pr-stack.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/update-pr-stack.sh b/update-pr-stack.sh
index 7d48e8f..a08be11 100755
--- a/update-pr-stack.sh
+++ b/update-pr-stack.sh
@@ -27,7 +27,7 @@ CONFLICT_LABEL="autorestack-needs-conflict-resolution"
 
 # Function to check if a required environment variable is set
 check_env_var() {
-    if [ -z "${!1}" ]; then
+    if [[ -z "${!1-}" ]]; then
         echo "Error: $1 is not set" >&2
         exit 1
     fi