MDL-13738 - Invalid context developer debug notice in manual grading.

diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 04114281ba6eb282bb3a125c25b13916dd38cb45..aaf50d8906f0c3b1a56f74a5e1bd53a8ed250dfe 100644 (file)
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -694,7 +694,7 @@ function quiz_get_reviewoptions($quiz, $attempt, $context=null) {
     $options->questionreviewlink = '/mod/quiz/reviewquestion.php';
 
     // Show a link to the comment box only for closed attempts
-    if ($attempt->timefinish && has_capability('mod/quiz:grade', $context)) {
+    if ($attempt->timefinish && !is_null($context) && has_capability('mod/quiz:grade', $context)) {
         $options->questioncommentlink = '/mod/quiz/comment.php';
     }