(deftest k.result-type-at-beginning.1 (iter (:for i below 2) (:collect i at beginning result-type vector)) #(1 0)) (deftest k.result-type-at-beginning.2 (iter (:for i below 2) (:collect i at beginning result-type list)) (1 0)) (deftest k.result-type-at-beginning.2a (iter (:for i below 2) (:collect i at beginning)) (1 0)) (deftest k.result-type-at-beginning.3 (iter (:for c in-string "ab") (:collect c at beginning result-type string)) "ba") Did I miss something?