From: William Desportes <williamdes@wdes.fr>
Date: Mon, 14 Apr 2025 21:27:12 +0200
Subject: Fix an undefined index error

Origin: vendor
Forwarded: no
---
 src/Phing/Task/Ext/Sass/SassCompiler.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Phing/Task/Ext/Sass/SassCompiler.php b/src/Phing/Task/Ext/Sass/SassCompiler.php
index 1b782c2..6dbc54e 100644
--- a/src/Phing/Task/Ext/Sass/SassCompiler.php
+++ b/src/Phing/Task/Ext/Sass/SassCompiler.php
@@ -52,7 +52,7 @@ class SassCompiler implements SassTaskCompiler
         list($return, $output) = $this->executeCommand($inputFilePath, $outputFilePath);
         if ($failOnError && $return !== 0) {
             throw new BuildException(
-                "Sass exited with return code {$return} and message '{$output[0]}'"
+                "Sass exited with return code {$return} and message '" . ($output[0] ?? '') . "'"
             );
         }
     }