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From: schorn@inf.ethz.ch (Peter Schorn)
Newsgroups: comp.sys.mac.programmer
Subject: Bug in LSP V2.01?
Message-ID: <3935@ethz-inf.UUCP>
Date: 18 Oct 89 10:36:00 GMT
Organization: Departement Informatik, ETH Zuerich
Lines: 26

I've run into a problem with Lighspeed Pascal V2.01 which appears to
be a compiler bug. I'm running LSP under Multifinder 6.1b7 on a Mac IIx in a
2MB partition. Running the following program with "Go" produces the
error messages "Your Application Zone is damaged. Proceed with caution"
and then "Nil dereference". These messages don't appear if the program
is run in single stop mode (in fact it works correctly then).

program test;
 type
  integerP=^integer;
  obj=object
    x:integerP;
    procedure init;
  end;

 procedure obj.init;
  procedure h(var y:integerP); begin new(y); y^:=19; end;
 begin h(x); end;

 var o: obj;
begin new(o); o.init; writeLn(o.x^); end.

Is this a compiler bug or am I doing something wrong?

Peter                                     schorn@inf.ethz.ch  or
                                          schorn@cs.unc.edu