Ivan Levkivskyi added the comment: A very simple repro:
with self.assertRaises(TypeError): Union[[]] It looks like the problem happens when a non-hashable argument is passed to cached function ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28649> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com