[Vm-dev] Re: SegmentationFault in with OmniBrowser

Andreas Raab andreas.raab at gmx.de
Sat May 19 17:54:45 UTC 2007

Damien Cassou wrote:
> The problem is that I can easily reproduce the crash. Just take a
> squeak-dev-beta-123 from
> http://damien.cassou.free.fr/squeak-dev/beta/, and use the 'Package
> Universe Browser' to upgrade to latest OB ('update list from network',
> 'select all upgrades' 'install selection').
> Can somebody help me?

Easy. Since the crash is reproducable there is a good chance the 
compiler got confused. Looking at the crash dump we can see that 
OBButtonModel triggers it upon a push so changing it to:

	ContextPart runSimulated:[bar push: self].

has a very good chance to trigger such problems. And indeed: Once you do 
this you get an error saying that instances of OBModalFilter aren't 
indexable which is raised during simulating OBModalFilter>>selection:. 
Looking at the bytecodes (or the decompile) of that method shows that 
there is indeed a major problem, plus in a couple of other methods 
(noteParent:child: for example).

How it got into this state is a great question, though. Somewhere, 
somehow your system is badly screwed up. Given that you have some fairly 
experimental Monticello changes in there I think it's a fair guess to 
assume that those might be causing the problem.

   - Andreas

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