If I have a Workshop module in a course and then go to view a "complete report", I get the following error:

Coding error detected, it must be fixed by a programmer: PHP catchable fatal error

More information about this error

Debug info: Argument 2 passed to workshop::__construct() must be an instance of stdClass, instance of cm_info given, called in [dirroot]/mod/workshop/lib.php on line 305 and defined
Error code: codingerror
Stack trace:
line 393 of /lib/setuplib.php: coding_exception thrown
line 190 of /mod/workshop/locallib.php: call to default_error_handler()
line 305 of /mod/workshop/lib.php: call to workshop->__construct()
line 131 of /report/outline/user.php: call to workshop_user_complete()

The complete report is the one found here:

https://MOODLE_URL/report/outline/user.php?id=USERID&course=COURSEID&mode=complete

The error is happening with this line of code in report/outline/user.php:

$user_complete($course, $user, $mod, $instance);

Which points to:

function workshop_user_complete($course, $user, $mod, $workshop) {

    global $CFG, $DB, $OUTPUT;

    require_once(dirname(__FILE__).'/locallib.php');

    require_once($CFG->libdir.'/gradelib.php');

    $workshop   = new workshop($workshop, $mod, $course);

    $grades     = grade_get_grades($course->id, 'mod', 'workshop', $workshop->id, $user->id);

The new workshop line is passing in $mod which is of class cm_info but the constructor function is expecting a stdClass object.

public function __construct(stdclass $dbrecord, stdclass $cm, stdclass $course, stdclass $context=null)

I can workaround this for now by using the following band-aid:

$cm = get_coursemodule_from_id('workshop', $mod->id);

$workshop   = new workshop($workshop, $cm, $course);

$grades     = grade_get_grades($course->id, 'mod', 'workshop', $workshop->id, $user->id);

It appears to work, but I have no idea what bizarre and unpredictable effects it might have, so I am hoping someone with a greater understanding than myself could weigh in.