Merge branch 'MDL-74358_400' of https://github.com/stronk7/moodle int…

…o MOODLE_400_STABLE
moodle · Jun 20, 2022 · 4cd3426 · 4cd3426
2 parents f02b730 + feb621d
commit 4cd3426
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/availability/classes/tree.php b/availability/classes/tree.php
@@ -684,7 +684,7 @@ public function update_after_restore($restoreid, $courseid,
             } else {
                 unset($this->children[$index]);
                 unset($this->showchildren[$index]);
-                $this->showchildren = array_values($this->showchildren);
+                $this->showchildren = !is_null($this->showchildren) ? array_values($this->showchildren) : null;
                 $changed = true;
             }
         }