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From: d88-jwa@dront.nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Think C Agony!
Message-ID: <1991Mar7.163853.28307@nada.kth.se>
Date: 7 Mar 91 16:38:53 GMT
References: <1991Mar7.063549.14081@dartvax.dartmouth.edu>
Sender: news@nada.kth.se (Mr News)
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 31
In-reply-to: sean@eleazar.dartmouth.edu's message of 7 Mar 91 06:35:49 GMT


	/* allocate bias matrix */
	if (!((**hclusterNew).prgbiasstruct =
		(BIASSTRUCT**) NewHandle(NumNodes * sizeof(BIASSTRUCT))))
                               ~~~~~~~~~

Be careful ! NewHandle moves memory, and you have a dereferenced
handle in **hclusterNew. In THINK C, this gets evaluated after
the function call, but not in all C compilers (I believe)...

		{
		DisposHandle(hclusterNew);
		return(FALSE);
		}
	(**hclusterNew).LearningRate = (**network).DefaultBiasLearningRate;

So what's "network" anyway ? It's hard to debug without knowing
how stuff is declared...

By the way, things that crash when run normally but don't when run
in the debugger usually don't initialize all the managers in the
right way.

(Check InitGraf, InitFonts, InitMenus, InitWindows, InitDialogs,
 TEInit for starters...)

						h+@nada.kth.se
						Jon W{tte
"The IM-IV file manager chapter documents zillions of calls, all of which
seem to do almost the same thing and none of which seem to do what I want
them to do."  --  Juri Munkki in comp.sys.mac.programmer