Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hoptoad!tim
From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Stack overflow
Message-ID: <10158@hoptoad.uucp>
Date: 10 Feb 90 20:12:38 GMT
References: <52023@bbn.COM>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 20

The "stack overflow" error in Plus is probably the same as the "too
much recursion" error in HyperCard.  It means that a script is invoking
itself (perhaps indirectly through another script) and continuing to
invoke itself until the script stack overflows.  With each invocation of
a script, the old script state is pushed on a data structure called a
stack, to be popped off the stack later when the invoked script
finishes.  The stack can only hold so many script states.

You can test if this what the error message means by simply writing
a self-invoking stack, then invoking it from the message box and
seeing what error you get.

on wombat
  wombat
end wombat
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

"Americans will buy anything, as long as it doesn't cross the thin line
 between cute and demonic." -- Ian Shoales