The implementation of seq calls alength on string values and should instead use .-length. (See CLJS-2335).
this is my first contribution, so I hope I did everything right. tell me if I missed anything!
Great! And I see your name is listed here https://clojure.org/community/contributors.
fixed https://github.com/clojure/clojurescript/commit/0598b93e309150a979d3a738ed6cb6a8558dde05
Thanks for your contribution Oliver!