catching asserts inside a future body fails silently, but why?

fails.clj

  (future
    (try
      (println "inside future body")
      (assert false) ;;
      (catch Exception e
        (println "error" (.getMessage e))))) ;; no error printed

  (try ;; not in a future, but just normal
    (println "inside future body")
    (assert false) ;;
    (catch Exception e
      (println "error" (.getMessage e)))) ;; error printed

  (future
    (try
      (println "inside future body")
      (throw (ex-info "throwing" {}))
      (catch Exception e
        (println "error" (.getMessage e))))) ;; error printed