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From: matthews@harvard.UUCP
Newsgroups: net.micro.mac
Subject: bug in FillPoly?
Message-ID: <664@harvard.UUCP>
Date: Wed, 29-Jan-86 16:05:13 EST
Article-I.D.: harvard.664
Posted: Wed Jan 29 16:05:13 1986
Date-Received: Sat, 1-Feb-86 06:08:52 EST
Organization: Aiken Comp Lab, Harvard
Lines: 32


	We have found what seems to be a quickdraw bug.  The code that
triggers it is as follows (in C):

	PolyHandle ph;

	ph = OpenPoly();
	MoveTo(2134,638);
	LineTo(-5000,-4954);
	LineTo(5000,2051);
	LineTo(1646,882);
	ClosePoly();
	FillPoly(ph,white);


	This causes a violent system crash, with all sorts of 
screen-shaking and sound effects.  We tried it in Aztec C's example
program and in Macintosh Pascal, with identical effects.  Substituting
black for the pattern parameter and calling ErasePoly instead of FillPoly
yielded the same result.

	Is this a known bug, and if so is there a known workaround?
FillPoly is integral to the program we are developing, and so it very
important for us to find out when we can count on it.

Any and all help would be appreciated.

Jim Matthews
matthews@harvard.arpa

Greg Kuperberg
greg@harvard.arpa