🚀 go-pugleaf

In article <28053@brunix.UUCP> mj@cs.brown.edu (Mark Johnson) writes:
> that I never had with the older version (1.2.2).  The one that bothers
> me most is that 1.3.1 sometimes just dies when I do a context switch
> back to it under Multifinder - I get an "Application has unexpectedly
> quit" message.  It doesn't seem to be reproducable, but does seem to
> happen when material is transfered via the clipboard.
> 
> Anybody else seen these symptoms?  Any suggestions for fixes?

I'm also having this problem, as are my colleagues.  It does
seem to be a quality of 1.3.1 more than 1.2.2.  One way such crashes
can occur in general is for a lisp pointer to something in the Mac
heap  to be left unnullified after that mac heap item (e.g., a pict)
has been disposed of. Then in GCing the lisp ptr leads to a meaningless
location in the heap, leading to disaster.  However, I and others have 
systematically looked for any such code problems and resolving them
has not resolved the overall problem.  The crash can even occur
 as a result of doing something in a DIFFERENT application 
(i.e., it triggers a crash of the lisp while the lisp is in the 
background (and I'm doing something innocuous like word processing)).  
   It is also frustratingly hard to isolate the conditions for the bug.
It even continued to occur when we set the lisp to not run
in the background.
   If someone from Mac Lisp would respond to this problem, that
would be great.

       Lucian Hughes