Support for clojure.core/extend is broken when used with typed.core/defprotocol

Question

Using extend with a protocol defined using typed.core/defprotocol, the following error occurs:

{{Type Error (client/clojurefx.clj:31:1) Internal Error (client/clojurefx.clj:31:1) Expecting Protocol type, found clojure.core.typed.type_rep.TypeFn@38c0769f}}

Answer 1

Reference: https://clojure.atlassian.net/browse/CTYP-195 (reported by alex+import)