From 7c77033fb6234ce225744b045e1a2d7e4e92bbf3 Mon Sep 17 00:00:00 2001
From: tjhunt <tjhunt>
Date: Mon, 23 Apr 2007 16:19:25 +0000
Subject: [PATCH] MDL-9524 - Formslib gets confused if a required field is
 frozen. Merged from MOODLE_18_STABLE.

---
 lib/formslib.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/formslib.php b/lib/formslib.php
index baf928c863..603cfb725c 100644
--- a/lib/formslib.php
+++ b/lib/formslib.php
@@ -1056,6 +1056,11 @@ class MoodleQuickForm extends HTML_QuickForm_DHTMLRulesTableless {
                 }
             }
         }
+
+        // Fix for MDL-9524. If you don't do this, then $element may be left as a reference to one of the fields in
+        // the form, and then that form field gets corrupted by the code that follows.
+        unset($element);
+
         $js = '
 <script type="text/javascript">
 //<![CDATA[
-- 
2.39.5