From e2baf7ed8a9046f611fd44d7ab4e18f9bf9b46d2 Mon Sep 17 00:00:00 2001
From: "Eloy Lafuente (stronk7)" <stronk7@moodle.org>
Date: Wed, 20 Jan 2016 02:50:15 +0100
Subject: [PATCH] MDL-50083 mod_assign: protect code against not set flags

Yes could have used !empty() but for some reason found
the isset() && condition more clear. Tired brain, surely.
---
 mod/assign/locallib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/assign/locallib.php b/mod/assign/locallib.php
index fe7700e616e..09121a893e1 100644
--- a/mod/assign/locallib.php
+++ b/mod/assign/locallib.php
@@ -7163,7 +7163,7 @@ class assign {
 
         $this->update_submission($newsubmission, $userid, false, $this->get_instance()->teamsubmission);
         $flags = $this->get_user_flags($userid, false);
-        if ($flags->locked) {
+        if (isset($flags->locked) && $flags->locked) { // May not exist.
             $this->process_unlock_submission($userid);
         }
         return true;