From a18e060c5b35beea719348d8aa99032910c1daa5 Mon Sep 17 00:00:00 2001
From: Tony Butler <tonyjbutler@gmail.com>
Date: Mon, 11 Aug 2014 13:58:40 +0100
Subject: [PATCH] MDL-46281 core_backup: Add class_exists check for
 backup_<mod>_activity_task

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
---
 backup/moodle2/backup_xml_transformer.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backup/moodle2/backup_xml_transformer.class.php b/backup/moodle2/backup_xml_transformer.class.php
index 63fb8a82bd3..eb5b1766fa7 100644
--- a/backup/moodle2/backup_xml_transformer.class.php
+++ b/backup/moodle2/backup_xml_transformer.class.php
@@ -159,7 +159,7 @@ class backup_xml_transformer extends xml_contenttransformer {
         // Add the module ones. Each module supporting moodle2 backups MUST have it
         $mods = core_component::get_plugin_list('mod');
         foreach ($mods as $mod => $moddir) {
-            if (plugin_supports('mod', $mod, FEATURE_BACKUP_MOODLE2)) {
+            if (plugin_supports('mod', $mod, FEATURE_BACKUP_MOODLE2) && class_exists('backup_' . $mod . '_activity_task')) {
                 $encoders['backup_' . $mod . '_activity_task'] = 'encode_content_links';
             }
         }