Debug info:
Error code: generalexceptionmessage
Stack trace:
line 352 of /question/type/coderunner/question.php: Error thrown
line 237 of /question/type/coderunner/question.php: call to qtype_coderunner_question->get_attached_files()
line 626 of /question/behaviour/behaviourbase.php: call to qtype_coderunner_question->is_same_response()
line 679 of /question/behaviour/behaviourbase.php: call to question_behaviour_with_save->is_same_response()
line 114 of /question/behaviour/adaptive/behaviour.php: call to question_behaviour_with_save->process_save()
line 93 of /question/behaviour/adaptive_adapted_for_coderunner/behaviour.php: call to qbehaviour_adaptive->process_save()
line 95 of /question/behaviour/adaptive/behaviour.php: call to qbehaviour_adaptive_adapted_for_coderunner->process_submit()
line 78 of /question/behaviour/adaptive_adapted_for_coderunner/behaviour.php: call to qbehaviour_adaptive->process_action()
line 1299 of /question/engine/questionattempt.php: call to qbehaviour_adaptive_adapted_for_coderunner->process_action()
line 729 of /question/engine/questionusage.php: call to question_attempt->process_action()
line 610 of /question/engine/questionusage.php: call to question_usage_by_activity->process_action()
line 1907 of /mod/quiz/attemptlib.php: call to question_usage_by_activity->process_all_actions()
line 2254 of /mod/quiz/attemptlib.php: call to quiz_attempt->process_submitted_actions()
line 89 of /mod/quiz/processattempt.php: call to quiz_attempt->process_attempt()
Fixed in the latest CodeRunner release, V3.7.2, available from github or the Moodle question repository.