From d9e0726431e3141f273047e5a14480dfb9847d4d Mon Sep 17 00:00:00 2001
From: Sam Hemelryk <sam@moodle.com>
Date: Fri, 12 Nov 2010 07:53:55 +0000
Subject: [PATCH] lib MDL-1975 Users who have been auto logged in by guest are
 now redirected to login on capability exceptions rather than being shown the
 exception.

---
 lib/moodlelib.php | 1 +
 lib/setuplib.php  | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 60dbcc95559..82b82b0be31 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -2330,6 +2330,7 @@ function require_login($courseorid = NULL, $autologinguest = true, $cm = NULL, $
             }
             $lang = isset($SESSION->lang) ? $SESSION->lang : $CFG->lang;
             complete_user_login($guest, false);
+            $USER->autologinguest = true;
             $SESSION->lang = $lang;
         } else {
             //NOTE: $USER->site check was obsoleted by session test cookie,
diff --git a/lib/setuplib.php b/lib/setuplib.php
index ae941285873..116b4b484b1 100644
--- a/lib/setuplib.php
+++ b/lib/setuplib.php
@@ -274,11 +274,16 @@ class invalid_dataroot_permissions extends moodle_exception {
  * @return void -does not return. Terminates execution!
  */
 function default_exception_handler($ex) {
-    global $DB, $OUTPUT;
+    global $CFG, $DB, $OUTPUT, $USER, $FULLME, $SESSION;
 
     // detect active db transactions, rollback and log as error
     abort_all_db_transactions();
 
+    if (($ex instanceof required_capability_exception) && !CLI_SCRIPT && !AJAX_SCRIPT && !empty($CFG->autologinguests) && !empty($USER->autologinguest)) {
+        $SESSION->wantsurl = $FULLME;
+        redirect(get_login_url());
+    }
+
     $info = get_exception_info($ex);
 
     if (debugging('', DEBUG_MINIMAL)) {