From 7cdf7d24892efaadf954564567c661eba868d7b4 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Sun, 27 Sep 2020 15:03:19 +0200
Subject: [PATCH] [Filesystem] fix for PHP 8

---
 Filesystem.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Filesystem.php b/Filesystem.php
index 0dda9f28af..a6e8715256 100644
--- a/Filesystem.php
+++ b/Filesystem.php
@@ -599,13 +599,13 @@ public function mirror($originDir, $targetDir, \Traversable $iterator = null, $o
      */
     public function isAbsolutePath($file)
     {
-        return strspn($file, '/\\', 0, 1)
+        return '' !== (string) $file && (strspn($file, '/\\', 0, 1)
             || (\strlen($file) > 3 && ctype_alpha($file[0])
                 && ':' === $file[1]
                 && strspn($file, '/\\', 2, 1)
             )
             || null !== parse_url($file, \PHP_URL_SCHEME)
-        ;
+        );
     }
 
     /**