Roles and capability settings are as in standrad Moodle. Additionally for the student role the capability moodle/role:unassignself is set to allowed (so that a student can unenrol himself from a course).

There are two ways to unenrol from a course:

Case 1. Unenroling myself (in the role of a student) via Administration block on the course page (see blocks/admin/block_admin.php - here NO userid parameter is passed to course/unenrol.php)

Case 2. Using the Unenrol button in the user profile.
Case 2a: unenrol myself (in the role of a student)
Case 2b. unenrol any user of the course (if I am in the role of an editing teacher)

Case 2a does not work - the following error messages appears:
"Sorry, but you do not currently have permissions to do that (Assign roles to users)"

Looking at the code in user/view.php we see that when clicking the unenrol button (Case2) the userid parameter is set and passed to course/unenrol.php.

Now looking at course/unenrol.php we find the code lines 31ff:

if ($userid)

{ // Unenrolling someone else require_capability('moodle/role:assign', $context, NULL, false); }

else

{ // Unenrol yourself require_capability('moodle/role:unassignself', $context, NULL, false); }

However this works only for case1 and case 2b.

In order to work for case 2a the code should be modified as follows:

if ($userid AND $userid != $USER->id)

{ require_capability('moodle/role:assign', $context, NULL, false); // case 2a and 2b }

else

{ // Unenrol yourself require_capability('moodle/role:unassignself', $context, NULL, false); // case 1 }

Can anyone check this please?