[no subject]

[JPG at MIT-MC (Jeffrey P. Golden)]

From: BR@MIT-MC
Date: Thu, 23 Jun 78 00:53:06 GMT
Original-Date: 06/22/78 20:53:06 EDT
Subject:
USING (CONTROL)] TO FIND OUT THE RUN TIME VERY OFTEN RESULTS
IN THE DESTRUCTION OF THE CALCULATION. TYPICAL MESSAGES
ARE LOST USER INTERRUPT OR (LATELY) SOME LONG MESSAGE INVOVLVING 
FILE SPECS BEING  LOST. VERY OFTEN MEANS ONCE OR TWICE A SESSION....
FROM THE USER POINT OF VIEW RATHER OFTEN.

I agree that this problem is serious.  I have not heard of this occurring 
for quite some time now previous to your message.  Unfortunately this is 
a LISP bug with LISP's interrupt scheme that is particularly difficult to 
track down.  Perhaps with HIC's help we can devise a breakpoint scheme or 
something that would make it easier to debug this when it occurs.