[Fluxus] nuke button crash

[gabor papp]

> This is now fixed in cvs, but I'm trying to track down another elusive
> crash I got last night - which is proving to be difficult to spot.
are you sure you committed the changes? i don't see anything changed 
apart from ribbon-prim.scm and poly-tools.ss.

could you explain how you found the cause for the f6 crash, please? i 
tried a couple of things, but i was unable to do anything with the 
extensive list of scheme calls which came from the backtrace.

best,
gabor