Testing difficulty: medium - requires source code modification and access to the server's error log 1. Apply the following patch to simulate an exception happening during the shutdown: diff --git a/admin/tool/log/classes/log/manager.php b/admin/tool/log/classes/log/manager.php index 2b1d49107f..907cc0aa74 100644 --- a/admin/tool/log/classes/log/manager.php +++ b/admin/tool/log/classes/log/manager.php @@ -190,6 +190,7 @@ class manager implements \core\log\manager { * this allows us to implement buffering of write operations. */ public function dispose() { + throw new \Exception('Accidents happen!'); if ($this->stores) { foreach ($this->stores as $store) { $store->dispose(); 2. Load a Moodle page (does not matter which one, any request should make it). 3. Check the error log of your web server. 4. TEST: Confirm that there is a line describing where the exception happened and that it was ignored, like: Exception ignored in shutdown function tool_log\\log\\manager::dispose: Accidents happen!