TypeError: unhashable type: 'set'
https://sentry.gitmate.io/gitmate/release-candidate-backend/issues/323/
TypeError: unhashable type: 'set'
File "celery/app/trace.py", line 374, in trace_task
R = retval = fun(*args, **kwargs)
File "celery/app/trace.py", line 629, in __protected_call__
return self.run(*args, **kwargs)
File "plugins/gitmate_similar_ee/responders.py", line 178, in gitmate_similar_ee
set_bucketed_labels(issue, label_blacklist)
File "plugins/gitmate_similar_ee/svm.py", line 180, in set_bucketed_labels
valid_buckets = {get_buckets(groups, label) for label in repo_labels - set(issue.labels)}
File "plugins/gitmate_similar_ee/svm.py", line 180, in <setcomp>
valid_buckets = {get_buckets(groups, label) for label in repo_labels - set(issue.labels)}
TypeError: unhashable type: 'set'