commit 4fd7936e67a6511ee6997efd5a24b40bb25dac0f
Author: Ali Abdulrahman <ali.abdulrahman@lnu.se>
Date:   Mon Sep 17 12:43:28 2018 +0200

    Fixing bug in instantiation of moodle_exception

diff --git a/enrol/manual/externallib.php b/enrol/manual/externallib.php
index a9b86d1faa5..b14dddfc744 100644
--- a/enrol/manual/externallib.php
+++ b/enrol/manual/externallib.php
@@ -202,7 +202,7 @@ class enrol_manual_external extends external_api {
             require_capability('enrol/manual:unenrol', $context);
             $instance = $DB->get_record('enrol', array('courseid' => $enrolment['courseid'], 'enrol' => 'manual'));
             if (!$instance) {
-                throw new moodle_exception('wsnoinstance', 'enrol_manual', $enrolment);
+                throw new moodle_exception('wsnoinstance', 'enrol_manual', '', $enrolment);
             }
             $user = $DB->get_record('user', array('id' => $enrolment['userid']));
             if (!$user) {
diff --git a/patch.txt b/patch.txt
new file mode 100644
index 00000000000..42ad15b0b95
--- /dev/null
+++ b/patch.txt
@@ -0,0 +1,19 @@
+commit 27f023b1f937057e110641a683b156417250c817
+Author: Ali Abdulrahman <ali.abdulrahman@lnu.se>
+Date:   Mon Sep 17 12:40:10 2018 +0200
+
+    Fixing bug in instantiation of moodle_exception
+
+diff --git a/enrol/manual/externallib.php b/enrol/manual/externallib.php
+index a538ac33429..a9b86d1faa5 100644
+--- a/enrol/manual/externallib.php
++++ b/enrol/manual/externallib.php
+@@ -120,7 +120,7 @@ class enrol_manual_external extends external_api {
+             if (empty($instance)) {
+               $errorparams = new stdClass();
+               $errorparams->courseid = $enrolment['courseid'];
+-              throw new moodle_exception('wsnoinstance', 'enrol_manual', $errorparams);
++              throw new moodle_exception('wsnoinstance', 'enrol_manual', '', $errorparams); // $link isn't required here
+             }
+ 
+             // Check that the plugin accept enrolment (it should always the case, it's hard coded in the plugin).