"-c" "sleep 3; echo OK") (then (lambda (reason) (/ 1 0) ;; an error occurs!! (message-box "then %s" reason))) (promise-catch (lambda (reason) (message-box "catch error!! %s" reason))) (done (lambda (reason) (message-box "done. %s" reason))))) (mstk-start-promise-2a) ͔Γ͍͢ɾɾɾʁ