From 65f1b15c953805816133db3d3f92ff4c35c57741 Mon Sep 17 00:00:00 2001
From: eldritch horrors <pennae@lix.systems>
Date: Thu, 7 Mar 2024 03:35:47 +0100
Subject: [PATCH] Merge pull request #9934 from nmeum/absPath-out-of-bounds

absPath: Explicitly check if path is empty before accessing it
(cherry picked from commit 6ec08b85f607852eb6f976c1392c4917d0a53787)
Change-Id: Ieeb53fb65d0e334e6017ceb3a48b3b6ae1047843
---
 src/libutil/util.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 6fcce5d67..51cda9da4 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -115,7 +115,7 @@ void replaceEnv(const std::map<std::string, std::string> & newEnv)
 
 Path absPath(Path path, std::optional<PathView> dir, bool resolveSymlinks)
 {
-    if (path[0] != '/') {
+    if (path.empty() || path[0] != '/') {
         if (!dir) {
 #ifdef __GNU__
             /* GNU (aka. GNU/Hurd) doesn't have any limitation on path