@vector-segment and string-segment enter infinite loop (needs argument check)

[jpellegrini]

Hello,
The 'n' passed to @vector-segment from SRFI-160 and string-segment from SRFI-152 needs to be strictly greater than zero, otherwise Gauche enters an infinite loop:

(use srfi-152)
(use srfi-160)
(string-segment "abcdefg" 0)  ;; <- loop
(u8vector-segment #u8(1 2 3 4 5 6 7 8 9 10 100 200 222) 0)  ;; <- loop

The SRFIs don't mention this specific case, but I suppose this case should trigger an error.

I'd provide a patch, but I'm not familiar with Gauche's source (I actually couldn't find where those procedures are implemented).

[shirok]

Thanks. I agree it should trigger an error. Fix pushed.

[jpellegrini]

Now that the two procedures refuse the zero argument, I understand that this issue can be closed.