[plt-scheme] r6rs (Possible) bug with zip?

Compile message is:
null-list?: argument out of domain {1 2 3}

My code is>>
#!r6rs
(import (rnrs base (6))
        (rnrs io simple)
        (prefix (srfi :1 lists) srfi1.))

(display (srfi1.zip '(1 2 3)))
(newline)


I am using: 4.2.1.4-svn29jul2009 on unix.