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From: a_dent@fennel.cc.uwa.oz.au
Newsgroups: comp.sys.mac.programmer
Subject: Re: Another THINK Pascal gotcha - "With" instance vars
Message-ID: <1991Jan29.021918.2841@fennel.cc.uwa.oz.au>
Date: 28 Jan 91 18:19:18 GMT
References: <1991Jan25.233122.2825@fennel.cc.uwa.oz.au> <5479@husc6.harvard.edu>
Organization: University of Western Australia
Lines: 27

In article <5479@husc6.harvard.edu>, siegel@endor.uucp (Rich Siegel) writes:
> 
> 	Also, calling New( ) for an instance variable is a good way to
> crash, since it involves taking the address of the instance variable. This
> will be fixed in the next version of the compiler...

Thanks a zillion - I do this all over the place!
(I think my app will probably survive a Heapscramble now, will try it & let
the net know if it still doesn't - there may be yet another "vulnerability"
out there in the undergrowth, Bud.)

> 
>>I suspect that the THINK environment does a lot of locking of objects behind
>>the scenes so this one probably also qualifies as a "only crashes compiled
>>applications" scenario.
> 
> 	In fact, the debugger does absolutely nothing "behind the scenes";
> crashes like this are usually purely random.
I have to admit a statician would sneer at the size of the sample on which I
ventured this opinion :-)

> 
>  Rich Siegel	Symantec Languages Group  Internet: siegel@endor.harvard.edu
Andy Dent                     A.D. Software phone 09 249 2719
Mac & VAX programmer          94 Bermuda Dve, Ballajura
a_dent@fennel.cc.uwa.oz       Western Australia  6066     
a_dent@fennel.cc.uwa.oz.AU (international)