define-syntax

[Pach Roman (DGS-EC/ESG3)]

I've performed following two short tests.

test 1:
-------

(use-syntax (ice-9 syncase))

(define-syntax my-macro-1
  (syntax-rules ()
    ((_ par1 par2 par3)
     (begin
           (string-concatenate (list par1 par2 par3))
           ))))

(define (dummy)
  (my-macro-1 "a" "b" "c"))

(format #t "dummy => ~s\n" (procedure-source dummy))

result:
dummy => (lambda () (string-concatenate (list "a" "b" "c")))

test 2:
-------
(define-macro (my-macro-2 par1 par2 par3)
  (string-concatenate (list par1 par2 par3)))

(define (dummy)
  (my-macro-2 "a" "b" "c")
  )
(dummy)
(format #t "dummy => ~s\n" (procedure-source dummy))

result:
dummy => (lambda () "abc")

It seems to me the define-syntax is broken in version "1.8.2"
or I've done something wrong.