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From: brett@visix.com (Brett Bourbin)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Manx vs. SAS/Lattice
Message-ID: <1991Apr19.193033.13587@visix.com>
Date: 19 Apr 91 19:30:33 GMT
References: <9104021420.AA10848@thunder.LakeheadU.Ca>  <stephen.672004888@cia.docs.uu.se>
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Reply-To: brett@visix.com
Organization: Visix Software Inc, Reston, VA 22091
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In article <stephen.672004888@cia.docs.uu.se>, stephen@cia.docs.uu.se (Stephen Cooper) writes:
> Yet another bug in AztecC 5.0d:  (YABIAC? :-)
> Compiling this:
>  
> void
> DrawCurves (void)
> {
>   SHORT xy[MAXPOINTS * 2];
>   struct Border BezierBorder =
>   {0, 0, 1, 0, COMPLEMENT, MAXPOINTS, &xy, NULL};
>  
>   get_polypoints (DrawBezier, Bezier_Window, &BezierBorder);
>   return;
> }
>  
> will give internal error #40, while compiling this:
>  
> void
> DrawCurves (void)
> {
>   SHORT xy[MAXPOINTS * 2];
>   struct Border BezierBorder =
>   {0, 0, 1, 0, COMPLEMENT, MAXPOINTS, NULL, NULL};
>  
>   BezierBorder.XY = xy;
>   get_polypoints (DrawBezier, Bezier_Window, &BezierBorder);
>   return;
> }
>  
> is OK.  What gives?  I mean really -- Internal errors???
> For that?!?!

Yes, for that.  It looks like "xy" is declared in a procedure and is a local variable,
which means it will be allocated when you call the routine, from the stack.  Now, you
then try to take the address of a item that will be on the stack.  A no-no.  You can 
either make the "xy" array "static" so it will not be on the stack, or you could pull
it outside the DrawCurves() function and make it global (yech!).

Hope this helps.

> stephen@jfk.docs.uu.se
-- 
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