gistfile1.el

(defun search-github(repository_name)
  (request
  "https://api.github.com/search/repositories"
 :params '(("q" . "test" )  ("sort" . "stars")  ("order" . "desc"))
  :parser 'json-read
  :success (function*
            (lambda (&key data &allow-other-keys)
              (let* ((items    (assoc-default 'items data))
                     (names    (mapcar (lambda (item) (assoc-default 'name        item)) items))
                     (launches (mapcar (lambda (item) (assoc-default 'launch_date item)) items)))
                (mapcar* (lambda (name launch)
                           (message "name:`%s` launch:`%s`" name launch))
                         names
                        launches)))))))
;;;;;;;;;;;;;
when i replace "test" on line 5 with (concat "te" "st") i get =>
Wrong type argument: integerp, concat