From e168e38813541c31ff486ca2d2a2c7b220919e8f Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Mon, 16 Nov 2015 14:37:42 +0000
Subject: [PATCH] MDL-52166 gradebook: overview report fails with separate
 groups

---
 grade/report/overview/index.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/grade/report/overview/index.php b/grade/report/overview/index.php
index 15954dc669a..9f0fbce572b 100644
--- a/grade/report/overview/index.php
+++ b/grade/report/overview/index.php
@@ -64,9 +64,9 @@ if (isset($personalcontext) && $courseid == SITEID) {
 if ($userid == $USER->id) {
     $settings = $PAGE->settingsnav->find('mygrades', null);
     $settings->make_active();
-} else if ($courseid != SITEID) {
+} else if ($courseid != SITEID && $userid) {
     // Show some other navbar thing.
-    $user = $DB->get_record('user', array('id' => $userid));
+    $user = $DB->get_record('user', array('id' => $userid), '*', MUST_EXIST);
     $PAGE->navigation->extend_for_user($user);
 }