MDL-71728 mod_quiz: check if user can access this page

mod/quiz/processattempt.php

@@ -85,6 +85,12 @@
             'attemptalreadyclosed', null, $attemptobj->review_url());
 }
 
+// If this page cannot be accessed, notify user and send them to the correct page.
+if (!$finishattempt && !$attemptobj->check_page_access($thispage)) {
+    throw new moodle_exception('submissionoutofsequencefriendlymessage', 'question',
+            $attemptobj->attempt_url(null, $attemptobj->get_currentpage()));
+}
+
 // Process the attempt, getting the new status for the attempt.
 $status = $attemptobj->process_attempt($timenow, $finishattempt, $timeup, $thispage);