From 07af06df96728b9265c1632f5469e066dd405e6f Mon Sep 17 00:00:00 2001
From: Mark Nelson <markn@moodle.com>
Date: Tue, 6 Dec 2016 14:10:06 +0800
Subject: [PATCH] MDL-57283 core: fixed function call on null

---
 lib/filterlib.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/filterlib.php b/lib/filterlib.php
index 230fd3fe728..688ec006daa 100644
--- a/lib/filterlib.php
+++ b/lib/filterlib.php
@@ -295,6 +295,9 @@ class filter_manager {
                 $filter = $this->textfilters[$context->id][$name];
             } else {
                 $filter = $this->make_filter_object($name, $context, $config);
+                if (is_null($filter)) {
+                    continue;
+                }
             }
             $filter->setup($page, $context);
         }
-- 
2.11.4.GIT