Xref: utzoo comp.sys.mac.programmer:23331 comp.sys.mac.system:4065 comp.sys.mac.misc:10554
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.system,comp.sys.mac.misc
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!decwrl!ads.com!killer!usenet
From: anders@verity.com (Anders Wallgren)
Subject: Re: Virtual screws up Macsbug?? (was Re: MacsBug 6.2b1 sees ALL...)
Reply-To: anders@verity.com (Anders Wallgren)
Organization: Verity, Inc., Mountain View, CA
Date: Fri, 5 Apr 91 02:23:15 GMT
Message-ID: <1991Apr5.022315.17797@verity.com>
Followup-To: comp.sys.mac.programmer
In-Reply-To: gft_robert@gsbacd.uchicago.edu (opcode ranger)
References: <1991Apr3.195724.1@gsbacd.uchicago.edu> <1991Apr4.145959.1@gsbacd.uchicago.edu>
Sender: usenet@verity.com (USENET News)

In article <1991Apr4.145959.1@gsbacd.uchicago.edu>, gft_robert@gsbacd (opcode ranger) writes:
>In article <1991Apr3.195724.1@gsbacd.uchicago.edu>, I wrote
>> -- 
>> 
>> I was working on an app in MPW C and then in THINK C and whenever I checked
>> (hc) the heap in MacsBug I kept getting "zone bad".  Fair enough, but
>> I started getting "zone bad" in THINK itself, even after a reboot.  Then
>> I checked, and even after a reboot, any other app besides the Finder
>> gives me "zone bad" on a heap check, even if it's the first (after Finder)
>> launched.
>
>Well, thanks to the help of a net reader I was able to figure out that Virtual
>(2.0.2) was causing (spurious?) readings of 'zone pointer is bad' in MacsBug
>6.2b1.
>
>Now for the important question: is Virtual actually screwing things up? Or is
>MacsBug returning bogus information?  If the latter, is there a version that
>won't do this?  (The person who helped me said that he'd experienced problems
>also with MacsBug 6.1 and Virtual).
>

I've experienced problems with both MacsBug 6.1,6.2b1-3, and 6.2 Final
when using Virtual or Maxima.  I do not know if the problem is in
MacsBug or the Connectix products.  MacsBug 6.2 Final seems a little
more stable wrt. to one problem that I was having - I would break into
macsbug, but when I hit g/es/rs, etc. my mac would freeze and I would
have to do a cold boot.  Of course, 6.2 Final is buggier than the
betas in some other areas, like stack crawl, so I guess you can't win
them all.

anders