$ uname -a
NetBSD IANZAG 3.99.16 NetBSD 3.99.16 (GENERIC.MPACPI) #0: Wed Mar  8 02:32:49 
NOVT 2006  
toor@NBSD1:/usr/build/obj/i386/sys/arch/i386/compile/GENERIC.MPACPI i386

$ ulimit -a
time(cpu-seconds)    unlimited
file(blocks)         unlimited
coredump(blocks)     unlimited
data(kbytes)         262144
stack(kbytes)        2048
lockedmem(kbytes)    339918
memory(kbytes)       1019756
nofiles(descriptors) 64
processes            160
sbsize(bytes)        unlimited

$ cat foo.c 

int
main()
{
        int *ptr = (int *)0;
        *ptr = 123;

        return 0;
}

$ ./foo 
Memory fault 

$ ls -l
total 20
-rwxr-xr-x  1 ianzag  users  5431 Mar 13 16:05 foo
-rw-r--r--  1 ianzag  wheel    63 Mar 13 16:05 foo.c
-rw-------  1 ianzag  users    52 Mar 13 16:06 foo.core

I.e. core file is 52 bytes long and of course gdb does not eat it :-/

Is there some significant core size optimization was done in this realm in 
comparison to 3.99.15?

// wbr