Hi

In RealTime Quiz module, when clicking on the button «Show users» of the «Show answers» tab when nobody has yet answered to the quiz, I get the following error :

moodle_database::get_in_or_equal() does not accept empty arrays

Debug info:
Error code: codingerror

Stack trace: ◦line 693 of /lib/dml/moodle_database.php: coding_exception thrown
◦line 194 of /mod/realtimequiz/responses.php: call to moodle_database->get_in_or_equal()