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From: platt@emory.uucp (Dan Platt)
Newsgroups: comp.sys.mac
Subject: LSC bug(s)
Message-ID: <2274@emory.uucp>
Date: Mon, 12-Oct-87 19:47:41 EDT
Article-I.D.: emory.2274
Posted: Mon Oct 12 19:47:41 1987
Date-Received: Wed, 14-Oct-87 06:05:49 EDT
Reply-To: platt@emory.UUCP (Dan Platt)
Organization: Math & Computer Science, Emory University, Atlanta
Lines: 39

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choke on this lineater.
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I've detected a condition where code generated by the lightspeed
C compiler causes a system crash.  This code is generated by a
simple and innocuous piece of code:

walker.x=(r=rmax+rjump)*cos(theta=2*pi*rndm());

Pulling the two assignments out of the above statement:

theta=2*pi*rndm();
r=rmax+rjump;
walker.x=r*cos(theta);

produces code which doesn't cause the system to crash (make a
little bomb dialog box).

Declarations are of the form

double rndm();
double r,rmax,rjump,theta;
#define pi 3.14159265358979
struct { double x,y} walker;

rndm() returns a random number between 0 and 1 using the
Random() function from quickdraw.

Another thing I noticed is that programs generated by LSC don't
seem to work well with Juggler.

Any idea of whether and when these are expected to be fixed would
be appreciated.

Dan