[7.0] /bin/sh segfaulting during boot

[walt]

Oliver Fromme wrote:
> walt<w41ter at gmail.com>  wrote:
>   >  I'm now running RELENG_7 on three x86 machines, but (only) one of
>   >  them is behaving badly during bootup.
>   >
>   >  Once the rc.d scripts start to run, I see /bin/sh crashing dozens of
>   >  times before I finally see the login prompt.  A few of the normal
>   >  processes actually start okay, like ppp and named (this is my home
>   >  firewall), but many normal daemons like syslogd and sendmail are
>   >  not running.
>
> Last time I had symptoms like that, it turned out to
> be bad RAM.

I suspected the same, so I ran memtest86 overnight with no errors.
I compiled sh with debugging symbols -- and it won't crash so I
still can't get a backtrace.  Very frustrating.  But at least I
have a working sh :o)