freebsd stable - Jul 2013 - Weird regex behavior on 9.1-RELEASE on amd64 in 32-bit mode

I noticed that scsh (which only runs in 32-bit mode) fails on amd64.  I
narrowed it down to a regex malfunction (I think).  This program:

----snip----
#include <regex.h>
#include <stdio.h>

int
main(void)
{
  regex_t r;
  int status = regcomp(&r, "/afs", REG_EXTENDED);
  size_t nmatch   = 1 + r.re_nsub;
  regmatch_t pmatch[32];
  status = regexec(&r, "/afs/informatik", nmatch, pmatch, 0);
  {
    int i;
    for(i = 0; i < nmatch; i--) {
      printf("%d: %d - %d\n", i, (int) pmatch[i].rm_so, (int)
pmatch[i].rm_eo);
    }
  }
  return 0;
}
----snip----

This giveds me:

# gcc r.c
# ./a.out
0: 0 - 4
# gcc -m32 r.c
# ./a.out
0: 0 - 0

Is it me or is there a bug?  Help would be much appreciated!

-- 
Regards,
Mike

On Tue, Jul 09, 2013 at 08:08:22PM +0200, Michael Sperber
wrote:
> 
> I noticed that scsh (which only runs in 32-bit mode) fails on amd64.  I
> narrowed it down to a regex malfunction (I think).  This program:
> 
> ----snip----
> #include <regex.h>
> #include <stdio.h>
> 
> int
> main(void)
> {
>   regex_t r;
>   int status = regcomp(&r, "/afs", REG_EXTENDED);
>   size_t nmatch   = 1 + r.re_nsub;
>   regmatch_t pmatch[32];
>   status = regexec(&r, "/afs/informatik", nmatch, pmatch, 0);
>   {
>     int i;
>     for(i = 0; i < nmatch; i--) {
>       printf("%d: %d - %d\n", i, (int) pmatch[i].rm_so, (int)
pmatch[i].rm_eo);
>     }
>   }
>   return 0;
> }
> ----snip----
> 
> This giveds me:
> 
> # gcc r.c
> # ./a.out
> 0: 0 - 4
> # gcc -m32 r.c
> # ./a.out
> 0: 0 - 0
> 
> Is it me or is there a bug?  Help would be much appreciated!
-m32 does not work on stable.  You need HEAD.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 834 bytes
Desc: not available
URL:
<http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20130709/23d264b7/attachment.sig>