From a56bd8d4e135a731dd8295cdb144adc89aafdd3b Mon Sep 17 00:00:00 2001
From: Paul Holden <paulh@moodle.com>
Date: Tue, 21 Nov 2023 09:58:19 +0000
Subject: [PATCH] MDL-80202 repository_local: null check when recursing child
 nodes.

---
 repository/local/lib.php | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/repository/local/lib.php b/repository/local/lib.php
index ec6e19242c6..1e36bd40a23 100644
--- a/repository/local/lib.php
+++ b/repository/local/lib.php
@@ -132,11 +132,14 @@ class repository_local extends repository {
      * This function may skip subfolders and recursively add their children
      * {@link repository_local::can_skip()}
      *
-     * @param file_info $fileinfo
-     * @param string|array $extensions, for example '*' or array('.gif','.jpg')
+     * @param file_info|null $fileinfo
+     * @param string|string[] $extensions for example '*' or ['.gif', '.jpg']
      * @return array array of file_info elements
      */
-    private function get_non_empty_children(file_info $fileinfo, $extensions) {
+    private function get_non_empty_children(?file_info $fileinfo, $extensions): array {
+        if ($fileinfo === null) {
+            return [];
+        }
         $nonemptychildren = $fileinfo->get_non_empty_children($extensions);
         $list = array();
         foreach ($nonemptychildren as $child) {