ACP2E-1701: Error when flushing JavaScript/CSS cache

Author: Anna Bukatar

lib/internal/Magento/Framework/Filesystem/Driver/File.php

@@ -440,19 +440,20 @@ public function symlink($source, $destination, DriverInterface $targetDriver = n
      */
     public function deleteFile($path)
     {
-        $result = @unlink($this->getScheme() . $path);
+        @unlink($this->getScheme() . $path);
         if ($this->stateful) {
             clearstatcache(true, $this->getScheme() . $path);
         }
-        if (!$result) {
+
+        if ($this->isFile($path)) {
             throw new FileSystemException(
                 new Phrase(
                     'The "%1" file can\'t be deleted. %2',
                     [$path, $this->getWarningMessage()]
                 )
             );
         }
-        return $result;
+        return true;
     }
 
     /**