
Hi, Indeed, your example code crashes here too, on both OS X 10.5 and Windows XP (though I would guess that the GLU code is platform-independent). Since I have tolerance 0, that only happens if you have a duplicated vertex.
If the vertex (200,200) appears twice (as in the simple example I attach) then you get the bus error, presumably when calling the Combiner.
This makes me suspect that the nasty peeking and poking going on in the AnnotatedVertex Storable instance is not quite right, or something else is wrong in withCombineCallback or combineProperties (see
I checked the Storable instance for AnnotatedVertex already, and while the code looks somewhat strange, it appears to behave correctly. I will try and look into what happens... Balazs