The following reply was made to PR port-xen/29887; it has been noted by GNATS.

From: Martin Husemann <martin@duskware.de>
To: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
Cc: jhawk@MIT.EDU, gnats-bugs@netbsd.org,
	port-xen-maintainer@netbsd.org, netbsd-bugs@netbsd.org,
	tech-userlevel@netbsd.org
Subject: Re: port-xen/29887: sysctl kern.consdev coredumps
Date: Thu, 23 Jun 2005 09:23:11 +0200

 On Thu, Jun 23, 2005 at 12:19:47PM +0900, YAMAMOTO Takashi wrote:
 > i meant "because the idea to produce (null) and suppress coredump is
 > fundamentally bad."
 
 I agree. We would not start mapping a userspace address at VA 0 again, to stop
 dereferences of NULL pointers to core, right?
 
 This does not mean that we should remove the "(null)" output from printf,
 and maybe add it to puts as a stopgap fix.
 
 But IMHO we should discourage passing NULL pointers as %s to *printf* in the
 style doc and fix callers as we discover them.
 
 Martin