修复zend Loader.php 文件 下订单时报错问题

vendor/magento/zendframework1/library/Zend/Loader.php

@@ -177,19 +177,27 @@ class Zend_Loader
 
         foreach (self::explodeIncludePath() as $path) {
             if ($path == '.') {
-                if (is_readable($filename)) {
+                if (self::is_readable2($filename)) {
                     return true;
                 }
                 continue;
             }
             $file = $path . '/' . $filename;
-            if (is_readable($file)) {
+            if (self::is_readable2($file)) {
                 return true;
             }
         }
         return false;
     }
 
+    private static function is_readable2($filename) {
+        try {
+            return is_readable($filename);
+        } catch (Exception $ex) {
+            return false;
+        }
+    }
+    
     /**
      * Explode an include path into an array
      *