From f7e9dbcbe21a30abb8633bef57c02762f0e2334d Mon Sep 17 00:00:00 2001
From: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date: Fri, 7 Apr 2017 11:57:35 +0100
Subject: [PATCH] MDL-58539 assignfeedback_editpdf: Fix group assignment fatal
 error.

This makes sure that $grade->attemptnumber is not NULL before using its
value.
---
 mod/assign/feedback/editpdf/locallib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/assign/feedback/editpdf/locallib.php b/mod/assign/feedback/editpdf/locallib.php
index f69c8f521f8..1cdf136ffbe 100644
--- a/mod/assign/feedback/editpdf/locallib.php
+++ b/mod/assign/feedback/editpdf/locallib.php
@@ -58,7 +58,7 @@ class assign_feedback_editpdf extends assign_feedback_plugin {
      */
     public function get_widget($userid, $grade, $readonly) {
         $attempt = -1;
-        if ($grade) {
+        if ($grade && isset($grade->attemptnumber)) {
             $attempt = $grade->attemptnumber;
         } else {
             $grade = $this->assignment->get_user_grade($userid, true);