From 73af286bc87a66451325fe5f5c4c45545ae4c428 Mon Sep 17 00:00:00 2001
From: Petr Skoda <commits@skodak.org>
Date: Sat, 29 Jan 2011 19:20:34 +0100
Subject: [PATCH] MDL-26172 skip invalid group records during upgrade

---
 lib/db/upgradelib.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/db/upgradelib.php b/lib/db/upgradelib.php
index 0653ef766ff..327c625ba64 100644
--- a/lib/db/upgradelib.php
+++ b/lib/db/upgradelib.php
@@ -246,7 +246,10 @@ function upgrade_migrate_group_icons() {
         upgrade_set_timeout(60); /// Give upgrade at least 60 more seconds
         $pbar->update($i, $count, "Migrated group icons  $i/$count.");
 
-        $context = get_context_instance(CONTEXT_COURSE, $group->courseid);
+        if (!$context = get_context_instance(CONTEXT_COURSE, $group->courseid)) {
+            debugging('Invalid group record (id=' . $group->id . ') found.');
+            continue;
+        }
 
         if ($fs->file_exists($context->id, 'group', 'icon', $group->id, '/', 'f1.jpg')) {
             // already converted!