Path: utzoo!attcan!uunet!munnari.oz.au!uniwa!fennel.cc.uwa.oz.au!a_dent
From: a_dent@fennel.cc.uwa.oz.au
Newsgroups: comp.sys.mac.programmer
Subject: Re: Program 'runs' in LSP, but crashes when app runs
Message-ID: <1991Jan24.085452.2814@fennel.cc.uwa.oz.au>
Date: 24 Jan 91 00:54:52 GMT
References: <28060.279b01f2@kuhub.cc.ukans.edu>
Organization: University of Western Australia
Lines: 45

In article <28060.279b01f2@kuhub.cc.ukans.edu>, mlab2@kuhub.cc.ukans.edu writes:
> Has anyone else had one of those bugs with LSP where it RUNs under the
> compiler, but when COMPILED, the app crashes?
> 
> Can you characterize those bugs?  It would be nice to have a guide explaining
> likely errors when xx crash occurs.
> 
> Right now, I have an address error when the standalone runs - no prob under
> LSP.  (Maybe I ought to ship it AS source :) ).
The following is a repost of part of a recent posting of mine describing woes
with CLists:

2) If you are having trouble with random crashes traversing lists,
particularly a program which works in the THINK environment but
crashes in an application, then may have bad contents in a list. For some
reason, the THINK environment seems a lot more rugged and able to ignore
nonsense handles.  I wrote the following procedure and edited the CList 
source, to trap any such occurrences.  The Symantec licensing prohibits me
publishing the modified source, but basically you put lines like the following,
inside the Append, Remove, etc.. procedures:
 
  checkHandle(theObject, ' called from Append ');


{ include this procedure at the top of the implementation section of CList }
 procedure checkHandle (h: univ Handle; msg: Str255);
  var
   handleSize: Size;
   strHandle: Str255;
 begin
  handleSize := GetHandleSize(Handle(h));
  if handleSize = 0 then begin
    NumToString(Ord4(h), strHandle);
    debugStr(concat('Bad handle in ', msg, '  = ', strHandle));
   end;
 end;  { checkHandle }



> 
> john calhoun
Andy Dent                     A.D. Software phone 09 249 2719
Mac & VAX programmer          94 Bermuda Dve, Ballajura
a_dent@fennel.cc.uwa.oz       Western Australia  6066     
a_dent@fennel.cc.uwa.oz.AU (international)