Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!bionet!agate!ucbvax!alphalpha.com!nazgul
From: nazgul@alphalpha.com (Kee Hinckley)
Newsgroups: comp.windows.x.motif
Subject: Re: Popup of a popup BUG.
Message-ID: <901210192016.883@alphalpha>
Date: 11 Dec 90 00:20:16 GMT
References: <4319@soleil-tx.oakhill.UUCP>
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: The Internet
Lines: 18

> I create a motif widget called 'button'.  This widget pops up another widget
> 'popup1' and 'button' is set to insensitive.  'popup1' is a Selection widget.
> If I push the help button in 'popup1', I popup the 'popup2' widget, and set
> 'popup1' to insensitive.  When I am done, I pop down popup2, and set popup1
> to sensitive. Then if I popdown 'popup1' the application crashes.
> 
> Why is that?
Because you aren't using Motif 1.1.

Seriously.  Prior to 1.1, and in fact, prior to patchlevel 14 or so of the
R4 Intrinsics, you should never delete a widget.  It will work sometimes,
but both Motif and the Intrinsics were pretty bad about handling
dynamic creating and deletion of widgets.  There are problems with
space not being freed, there are problems with using space that *has*
been freed.  All in all it was a real mess.  That is the major reason
that we switched to 1.1.  (Your program, for what it's worth, works fine 
under my version of 1.1.)
				-kee